API Development is an effective way for software to communicate and interact with each other over the internet. It’s a great way for developers to expand the capabilities of a program or systems by creating interfaces and allow data to be shared between different types of technology. With an API, existing systems can connect and more advanced solutions can be made. Hiring an API Developer can enable businesses to streamline processes and enable a much faster integration of existing software solutions.

API Developers are skilled engineers specialized in creating new APIs and maintaining existing ones. They are responsible for developing and troubleshooting current APIs, designing APIs from standards-based web services, maintaining inventory and implementing authorization mechanisms. Additionally, they incorporate different technologies together to create advanced software solutions that integrate cloud systems like Amazon Web Services or MongoDB and APIs with point-and-click platforms, like WordPress or HubSpot.

Here’s some projects that our expert API Developer made real:

  • Creating advanced databases on different cloud systems
  • Linking between two cameras from a microscope
  • Interfacing with customizing Wordpress themes, Woocommerce themes and SMS services
  • Building secure back end systems to analyze different public APIs
  • Applying sophisticated authorization mechanisms
  • Creating comprehensive ecommerce websites using MERN Stack
  • Developing node APIs for exchange markets using Node.js, Web3.js, Ether.js
  • Automatically out of stocking items from supplier’s stock through an API system.

It is no surprise that good API Development is the cornerstone of many successful software solutions. Our expert API Developers are well experienced in developing suitable solutions for projects ranging from app development to SaaS applications, game development to enterprise system integrations. WithFreelancer.com, businesses can easily hire one of these skilled professionals to build their own bespoke projects that are perfectly tailored for their needs. So why not post your own project on Freelancer today and hire an expert API Developer?

From 111,592 reviews, clients rate our API Developers 4.9 out of 5 stars.
Hire API Developers

API Development is an effective way for software to communicate and interact with each other over the internet. It’s a great way for developers to expand the capabilities of a program or systems by creating interfaces and allow data to be shared between different types of technology. With an API, existing systems can connect and more advanced solutions can be made. Hiring an API Developer can enable businesses to streamline processes and enable a much faster integration of existing software solutions.

API Developers are skilled engineers specialized in creating new APIs and maintaining existing ones. They are responsible for developing and troubleshooting current APIs, designing APIs from standards-based web services, maintaining inventory and implementing authorization mechanisms. Additionally, they incorporate different technologies together to create advanced software solutions that integrate cloud systems like Amazon Web Services or MongoDB and APIs with point-and-click platforms, like WordPress or HubSpot.

Here’s some projects that our expert API Developer made real:

  • Creating advanced databases on different cloud systems
  • Linking between two cameras from a microscope
  • Interfacing with customizing Wordpress themes, Woocommerce themes and SMS services
  • Building secure back end systems to analyze different public APIs
  • Applying sophisticated authorization mechanisms
  • Creating comprehensive ecommerce websites using MERN Stack
  • Developing node APIs for exchange markets using Node.js, Web3.js, Ether.js
  • Automatically out of stocking items from supplier’s stock through an API system.

It is no surprise that good API Development is the cornerstone of many successful software solutions. Our expert API Developers are well experienced in developing suitable solutions for projects ranging from app development to SaaS applications, game development to enterprise system integrations. WithFreelancer.com, businesses can easily hire one of these skilled professionals to build their own bespoke projects that are perfectly tailored for their needs. So why not post your own project on Freelancer today and hire an expert API Developer?

From 111,592 reviews, clients rate our API Developers 4.9 out of 5 stars.
Hire API Developers

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    I need a complete web-based freelance job network built from the ground up. The core idea is similar to the big freelance marketplaces: clients post projects, freelancers create profiles, and both sides can connect and transact in a safe, intuitive environment. Scope • Full front-end and back-end development, responsive for desktop and mobile • Account management for both freelancers and clients, including profile creation, portfolio upload and basic analytics • Project posting with search and filter functions so users can quickly find relevant work or talent • Real-time or near-real-time messaging between parties to negotiate terms before a contract is created • Admin dashboard where I can moderate users, approve listings and pull platform metrics Te...

    £361 Average bid
    £361 Avg Bid
    152 bids

    I’m looking for a versatile engineer who can jump in right away and keep our product moving forward. The work is continuous and touches every layer of the stack: sharpening existing AI logic, extending backend services that feed it, and refreshing front-end elements so users immediately feel the impact of each release. What you’ll actually do is simple to state but vital to execute: pick up the next feature, ship it cleanly, document just enough for the team, and get ready for the one after that. Some tasks may revolve around tweaking or retraining models, others around streamlining API endpoints, and still others around refining the user interface so new capabilities surface beautifully. I need fast turnaround, solid testing, and proactive communication because these updates ...

    £13 / hr Average bid
    £13 / hr Avg Bid
    208 bids

    I’m building a mobile-first fintech app for cab drivers and delivery riders that gives them access to a credit-based wallet. In the first release the wallet must let users draw and spend fuel credits only, yet the codebase has to be flexible enough for us to turn on insurance and utility credits with minimal rework. What I need is the complete product journey: an iOS and Android app for the workers, a slim merchant view so fuel stations can accept payment, and a secure backend that approves credit, settles transactions in real time, and tracks repayments. KYC, instant balance updates, push notifications, and straightforward spending analytics all belong in the core scope. Use whatever modern stack you are fastest with, provided it integrates cleanly with common payment rails and ide...

    £177 Average bid
    £177 Avg Bid
    63 bids

    I need a complete software-development partner to turn my web-application idea into a running product. The core objective is to design, build, test, and deploy a modern, browser-based application that is fast, secure, and easy to extend. Here is what I have in mind: • End-to-end build: information architecture, UI/UX wireframes, front-end coding, back-end APIs, database schema, and cloud deployment. • Clean, well-commented source code stored in a Git repository I can access at any time. • Technical stack recommendations—feel free to suggest React, Vue, Angular, Node.js, Django, Laravel, or whatever you believe best meets the brief; I’m open to your expertise. • Responsive design so the app works smoothly on desktop, tablet, and mobile browsers. &bu...

    £118 Average bid
    £118 Avg Bid
    219 bids

    I’m putting together a restaurant POS modeled closely on the Petpooja experience, and I need the backbone of the system built right away. Your task is to create clean, well-documented PHP APIs that my mobile and web teams can plug into immediately. Scope of the APIs • Core focus: real-time inventory management—stock levels, item variations, automatic deductions after each sale, low-stock alerts, and simple purchase-order generation. • Seamless sales and transaction hooks so that, when I’m ready, we can extend the same codebase to cover billing, reporting, and customer data without rewriting everything. • Secure authentication, role-based access, and clear JSON responses are mandatory so integration stays painless. • MySQL (or MariaDB) is prefe...

    £232 Average bid
    £232 Avg Bid
    79 bids

    I need a full-cycle build of a School Management System delivered as a dedicated mobile app for both iOS and Android. The solution must include a solid back-end, restful APIs, and a well-structured database so that the Admin, Teacher, and Student roles each see only what they should. A classic username-and-password flow is enough for the first release, but it must be implemented securely with proper session handling and encryption in place. Core modules I expect from day one are fee tracking, attendance, timetable, examination results, push notifications, and printable reports. Everything should be responsive to different screen sizes, optimised for low-bandwidth scenarios, and ready for future additions such as two-factor login or parent access without major refactoring. Deliverables ...

    £1469 Average bid
    £1469 Avg Bid
    124 bids

    My C#-based desktop trading front end now needs a direct, real-time link to Sterling Trader Pro. The goal is full API integration that goes beyond a simple data feed: live quotes and depth, every order type Sterling supports, position & risk updates, plus a back-testing harness on the same codebase so strategies can run historically before they trade live. The current application is stable and well-structured; what is missing is the Sterling layer—authentication, session management, event handling, and the conversion of our existing order objects to Sterling’s message format. All work must remain in C# and respect Sterling’s API guidelines. Deliverables • Connection module that authenticates and maintains a persistent Sterling session • Real-time market ...

    £382 Average bid
    NDA
    £382 Avg Bid
    85 bids

    Project: Premium Loan / Fintech Android App + Admin Panel I need an experienced developer or development team to build a smooth, premium and modern Android fintech/loan application with an original design and professional user experience. My current budget is approximately ₹2,00,000, so I need the developer to propose the best realistic MVP within this budget. Please clearly mention which features are included now and which advanced features can be added later. Customer Android App Requirements Premium modern UI/UX Mobile number registration and OTP login Customer profile Personal and basic financial information forms Loan application form Loan amount selection Loan tenure selection Loan application status tracking Customer dashboard Active loan details Repayment schedule Payment history/s...

    £1000 Average bid
    £1000 Avg Bid
    108 bids

    We are looking for an experienced Flutter developer/team to build a modern and scalable Real Estate Mobile Application for Android and iOS. The platform will allow users to browse, search, filter, and explore residential and commercial properties. Users should be able to view detailed property listings including images, videos, pricing, location, amenities, and property/agent information. Key features will include: • User registration and secure authentication • Property listing and management • Advanced search and filters • Location/map-based property discovery • Property details with image/video gallery • Favorites and saved properties • Property inquiry and lead management • In-app chat between users and agents • Agent/owner profiles •...

    £401 Average bid
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    168 bids

    I am looking for an experienced developer/team to build an MVP civic issue reporting platform for a beta launch in Kanyakumari District, Tamil Nadu, India. The long-term vision is to expand the platform across Tamil Nadu and eventually Pan-India, so the backend and database architecture should be scalable. The platform will allow citizens to report genuine public/civic issues such as potholes, garbage, drainage, water problems, streetlights and other local infrastructure issues. This will initially operate as an independent citizen platform, not an official government application. Core Citizen Features The first version should include: * Simple mobile-friendly interface * Tamil + English * Citizen registration/login * Report an issue * Upload photo/video * Automatic GPS/location capt...

    £188 Average bid
    £188 Avg Bid
    46 bids

    I manage several property listings and, every day, messages arrive in Spanish across Text messages, WhatsApp, Facebook Messenger and Google Voice. I need a single AI-driven solution that can automatically pull each incoming message, translate it to English, understand whether the sender is asking about an available property, a booking detail, or a maintenance issue, and then craft a reply that feels helpful and human. For the reply style, I want a mix of both preset templates (e.g., directions to the property, check-in times, basic troubleshooting) and dynamic, context-aware wording that adjusts to the exact question or concern. The system should log all conversations, flag anything it cannot classify confidently, and let me jump in manually when needed. Please build or integrate with th...

    £313 Average bid
    £313 Avg Bid
    181 bids
    Debug & Enhance Custom CRM
    6 days left
    Verified

    My AI-generated CRM is 90 % there, but a mix of functional, interface, and performance glitches keep the core experience from feeling complete. Automations stall, nurture sequences stop midway, and the cross-selling module never fires. I need a developer who can: • Trace and squash the current functional, UI, and speed issues across the entire codebase. • Finish and hard-test the automation engine so every trigger, timer, and conditional fires reliably. • Build out the full follow-up nurture flow—email/SMS templates are ready, they just need proper sequencing and fail-safe logic. • Activate the cross-selling feature set so related-product offers surface at the right moments. Acceptance will be a fully working CRM where: 1. All existing bugs are clo...

    £56 Average bid
    £56 Avg Bid
    57 bids

    ### Telegram Member Extraction & Migration I am a member of a Telegram channel with 30,000+ members. The channel appears to have around 3,000 active users who regularly generate views and engagement. I am looking for an experienced Telegram API/MTProto developer to investigate whether it is technically possible to: * Extract or enumerate the channel's member/user list, despite the member list not being visible to regular members; * Identify active or engaged users where technically possible; * Collect available public user information such as Telegram user IDs, usernames, etc.; * Determine what information can be accessed through Telegram's API when using an account that is a member but not an administrator; * Explore options for transferring, inviting, or attracting these...

    £13 Average bid
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    47 bids

    I have an existing WhatsApp group whose entire membership I need copied into a fresh group. The task is purely about replicating the member list—no chat history or custom settings have to come across—so the solution can stay lean and compliant with WhatsApp limits. The current head-count is well over 100, therefore I’m looking for an automated method (API integration, approved third-party tool, or a lightweight script) that can: • Pull every existing member ID from the source group • Add them seamlessly to the new group without triggering spam flags • Provide a simple way for me to repeat the process in the future if the roster changes Please build in any required rate-limiting or invitation workflows so we respect WhatsApp’s policies. On deliv...

    £24 Average bid
    £24 Avg Bid
    58 bids

    I am looking for a Senior IBM i developer. This task is responsible for designing, developing, implementing and maintaining purchased and/or custom application solutions using the following technologies: RPG/400, RPGILE/400, DB2/400, CL/400, and additional IBM technologies. This task is responsible for applying functional business knowledge to develop, program, implement and/or support individual components. This involves planning, analysis, detailed design, developing/coding, testing and implementation of the components. This may also involve providing enhancements and ongoing application support to the deployed application. This position will require the ability to work independently and work collaboratively with other IT Developers, Contract Programmers, and Customers (internal and ex...

    £10 / hr Average bid
    £10 / hr Avg Bid
    51 bids

    I need a skilled web developer who can take a concept for a new website, app, or full-scale platform and turn it into a production-ready product. The scope is broad: it may be a business or corporate site, an e-commerce storefront, a booking system, or an entirely custom web application, but the common thread is that the finished build must be fast, responsive, scalable, and easy to maintain. Here is what I’m looking for in practical terms: • End-to-end development — planning, UI/UX, front-end and back-end code, testing, deployment, and post-launch support. • Modern tech stack familiarity. If you regularly work with React, Vue, Angular, Node.js, Django, Laravel, Rails, PostgreSQL/MySQL, MongoDB, AWS, Docker, REST or GraphQL APIs, you’ll feel at home here. ...

    £324 Average bid
    £324 Avg Bid
    303 bids

    I am looking for an experienced full-stack developer to build a simple, modern and mobile-friendly classified marketplace. The platform will allow individuals and businesses to list new or preloved items for sale. Buyers can purchase items in three ways: 1. Fixed Cash Price – Seller sets a price and buyer purchases. 2. Make an Offer – Buyer submits an offer; seller can accept, reject or counter. 3. Auction/Bidding – Seller sets a starting price and buyers compete by placing bids. Key features: * Simple user registration and profiles * Verified user profiles with verification badges * Post listings with photos, descriptions, price and location * Categories and search * Filters by price, location, condition and selling method * Buy Now, Make Offer and Bidding functional...

    £136 Average bid
    £136 Avg Bid
    271 bids

    I already have RPR’s Broker AVM script and token working when I hard-code a property address, but I need a small JavaScript tweak so site visitors can type any address and instantly see the valuation. Here’s the flow I’m after: • An address field sits right inside the existing widget code—no new layout blocks; it should feel native to the page that already hosts my contact forms, listings, and search tools. • On submit, the script captures the typed address, swaps it into the widget’s Query parameter, and calls the RPR service. • The returned valuation opens in a clean, responsive pop-up modal (desktop and mobile) and stays on the same page. • Everything must run inside Sierra Interactive’s Shared Widget / JavaScript environme...

    £97 Average bid
    £97 Avg Bid
    202 bids

    I am looking for an experienced developer or development team to help build a vehicle transport load board and transportation marketplace, starting with the Canadian car-hauling industry. The concept, business model, workflow, core features and initial visual prototype are already defined, and we are now ready to move into MVP development. Unlike traditional bidding platforms, our model is based on fixed-price loads: a dealer posts a vehicle or load at a set price, a carrier can accept it instantly, and the assigned driver manages pickup, VIN verification, vehicle inspection, photos, signatures, GPS tracking, delivery inspection and eBOL through the platform. We want to build iOS, Android and web/admin together on one shared backend, with one mobile app that provides different interfaces f...

    £3735 Average bid
    £3735 Avg Bid
    201 bids

    Title Full-Stack Mobile App Development – Android & iOS Description I am looking for an experienced developer or development team to build a complete mobile application for both Android and iOS from scratch. Project Requirements: - Android + iOS mobile application - UI/UX Design - Backend development - Database setup and management - User registration and login - User accounts and profiles - Users can add and manage their own listings/content - Image upload and management - Search and filtering - Push notifications - Admin Dashboard for managing users and content - Full API integration between the mobile app, backend, and database - Testing and bug fixing - Deployment and publishing on Google Play Store and Apple App Store - Full source code must be delivered to me at the end o...

    £354 Average bid
    £354 Avg Bid
    227 bids

    I need a web-based inventory system that lets me see, in real time, what I have on hand, what has been sold, and exactly how each sale affects my bottom line. Every stock-keeping unit may be purchased or produced in lots, so the system must allow me to group items by lot, trace their movement, and reconcile quantities automatically. As items leave the warehouse, I want automatic profit-and-loss calculations that factor in cost per lot, selling price, fees, and any manual adjustments I make. Day-to-day, my staff will also use this platform as a lightweight task manager: assigning picking, packing, restocking, and counting duties with deadlines and status updates tied back to the relevant stock items. A clear dashboard that shows outstanding tasks alongside key inventory and financial metri...

    £190 Average bid
    £190 Avg Bid
    92 bids

    I’m putting together a cross-platform billing and inventory SaaS that must run smoothly on the web (React) and mobile (Flutter). The core stack is already chosen: a Django backend with a PostgreSQL database, all deployed on AWS. Key functional blocks you’ll build and wire up: • Subscription engine – monthly recurring plans driven by Razorpay Subscriptions API, with optional Stripe fallback, automatic invoicing, proration, and dunning logic. • GST-compliant invoice management – create, edit, email, and share invoices; integrate with the GSTN e-invoicing APIs for real-time IRN and QR code generation. • Inventory & batch tracking – receive stock, monitor quantities, lot/expiry dates, and link sales orders to inventory reductions. &bul...

    £193 Average bid
    £193 Avg Bid
    76 bids

    I am looking for a Senior Backend Software Engineer to help design and build a scalable, production-grade Agentic Data Platform. The project focuses on building backend infrastructure for LLM-enabled data ingestion, enrichment, processing, and discovery across large and complex datasets. The platform should be designed from the beginning to support AI agents, automated workflows, and intelligent data retrieval. What you will work on - Design and implement scalable backend services and microservices - Build APIs using REST and gRPC - Design reliable data ingestion and processing pipelines - Build low-latency streaming and event-driven systems - Work with large-scale PostgreSQL / MySQL databases - Integrate LLMs and AI agents into backend workflows - Build data enrichment and discovery se...

    £23 / hr Average bid
    £23 / hr Avg Bid
    222 bids

    I’m looking for a complete marketplace listing solution built with PHP (latest stable version) and MySQL on the back-end, paired with a native Android app. The web portal should let me manage three distinct roles—Admin, Seller, and Buyer—each with the appropriate dashboards and permissions. Attached Pdf Flie Please Review & Share Your Work Link Listing Market Place link Android App ink Key points I need covered: • Web portal: clean UI for adding, editing, and browsing listings, plus the usual order flow and reports an admin would expect. • Role management: separate logins and capabilities for Admin, Seller, and Buyer, all controllable from the admin panel. • Android app: native code (Java or Kotlin) that mirrors the core buyer experience, supp...

    £344 Average bid
    £344 Avg Bid
    119 bids

    We run a workflow-automation SaaS that lets customers build event-driven processes, route approvals, and call external services. The stack is Java 17, Spring Boot, PostgreSQL, Celery, Redis, Docker and AWS, all delivered in a fully multi-tenant environment. The immediate goal is to harden security and drive horizontal scalability without slowing feature delivery. That means: • Strengthening authentication, authorization and tenant-isolation layers • Stress-testing and tuning PostgreSQL schemas, indexes and queries for millions of tenant rows • Refining REST/JSON APIs so third-party services can plug in cleanly, with versioning and clear contracts • Profiling Spring Boot services, Celery workers and Redis caching to remove bottlenecks, then containerising improve...

    £1454 Average bid
    £1454 Avg Bid
    181 bids

    I need a complete, end-to-end system that lets my car-rental dealership manage short-term loans, collect signed consent, and automatically track every toll a borrower racks up while driving in or outside Sydney. Here is the workflow I must see in production: 1. The dealer logs in, checks live vehicle availability, and emails a consent form from the dashboard. 2. The customer opens that form on web or mobile, e-signs, uploads their licence photo, and submits. 3. Once I approve, the keys change hands and the trip begins. 4. GPS hardware in each of my five cars streams location data; any time the vehicle passes through a toll point, the system calls the official Transport for NSW eToll API, records the charge, and assigns it to that customer’s booking. 5. Back in the dashboard...

    £7 / hr Average bid
    £7 / hr Avg Bid
    286 bids

    I need a single, streamlined WhatsApp-based admin chat that serves two purposes at once: handling customer order inquiries and giving my internal team a real-time messaging space. Scope • Set up or connect to the WhatsApp Business API (Cloud API, Twilio, or a similar approved gateway). • Build or configure an admin dashboard where agents can: – Respond to customer order questions from one unified inbox. – Switch seamlessly to an internal channel for real-time team discussions. • Ensure message routing clearly distinguishes external chats from internal threads. • Include search and simple tagging so agents can locate past order conversations quickly. • Provide basic onboarding documentation so new staff can get started without extra trai...

    £310 Average bid
    £310 Avg Bid
    185 bids

    Project Plan: Cab, Bike & E-Rickshaw Booking App 1. Project Goal Develop an app similar to Ola/Uber for booking: Cab Bike taxi E-Rickshaw The freelancer should preferably use an existing ready-made source code/software and customize it instead of developing the entire system from zero. 2. Required Applications A. Customer App Android first (iOS can be added later). Features: Mobile number login with OTP Current location using GPS Pick-up and drop location Choose vehicle type: Cab / Bike / E-Rickshaw Fare estimation Book now / schedule ride Live driver tracking Driver details Trip history Online payment / Cash payment Ratings and reviews Push notifications B. Driver App Features: Driver registration and approval Upload documents Online / Offline button Accept or reject ride requests Nav...

    £251 Average bid
    £251 Avg Bid
    95 bids

    I need a production-ready shopping app built from the ground up, covering mobile front-end, back-end services, and a web-based admin panel. Security & Sign-in Users will create accounts with the classic email/password flow. All traffic must travel over SSL, and stored credentials should be hashed and salted so the authentication layer passes a penetration test. Shopping Experience The interface has to feel effortless: smooth screen transitions, category browsing, and a fast, typo-tolerant product search. I’m expecting native performance on both iOS and Android, but I’m open to React Native or Flutter if you can still hit that standard. Payments Checkout must launch with PayPal, Stripe, and Square fully integrated. Each gateway should return clear success/failure ca...

    £1481 Average bid
    £1481 Avg Bid
    165 bids

    I am planning to launch an end-to-end ecommerce solution that can stand shoulder-to-shoulder with Amazon, Flipkart, Meesho, Snapdeal and Myntra. The build must ship simultaneously on iOS and Android, delivering a smooth, modern shopping experience that scales to a large, varied product catalogue. Core functionality I need from day one includes: • User account management (secure sign-up, social login, profile, wish-lists) • Payment gateway integration with all the standard cards and UPI/wallet providers for the Indian market • Product reviews with ratings, photos and a simple moderation flow If you have already built commerce apps, please share live links or store screenshots that prove it—your past work will be my primary evaluation criterion. At hand-ov...

    £443 Average bid
    £443 Avg Bid
    124 bids

    I'm looking for a senior developer with hands-on experience defeating Arkose Labs FunCaptcha (specifically the newer game variants such as hopscotch_highsec / hopscotchv3) in a headless / API-based pipeline. â–Ž â–Ž I already have a working Node.js codebase that: â–Ž - Mints Arkose tokens via a real-Chrome TLS client (bogdanfinn) â–Ž - Rotates residential proxies + BDA fingerprints per attempt â–Ž - Uses commercial classifiers (YesCaptcha, OmoCaptcha, ) â–Ž â–Ž The pipeline reaches the challenge-submit step consistently, but the classifiers we use are giving low-accuracy answers on the newer navigation-style variants, so we're getting solved:false on the final wave. â–Ž â–Ž What I need help with: â–Ž - Diagnosing whether the failure is truly answer-quality vs a deeper trust/suppression issue â–Ž - Imp...

    £128 Average bid
    £128 Avg Bid
    104 bids

    New offshore India position - *CST hours till 3 PM CST* *### Mandatory Skills* * **MAUI & React Native** * Basic understanding of native/mobile application development * Understanding of common mobile development challenges, platform-specific issues, performance, deployment, and troubleshooting * **Azure & Backend Services** * Azure Functions * Azure Blob Storage * Cosmos DB * SQL Database * Third-party API integrations * Webhooks * Payment gateway integrations * Understanding of integration-related challenges, error handling, retries, security, and scalability * **.NET Core** * Strong understanding of .NET Core * Dependency Injection (DI) * Authentication and Authorization mechanisms * API development and integration * **Node.js** * Understa...

    £849 Average bid
    £849 Avg Bid
    50 bids

    I’m building a full-featured e-commerce site and need a developer (or small team) who is fluent with the MERN stack—React.js on the front end, Node.js with on the back end, and MongoDB as the database. Core scope The store must be fast, cleanly coded, and fully responsive on mobile, tablet, and desktop. Beyond a polished UI, I’ll need secure user authentication, seamless MongoDB integration, and a checkout flow that uses PayU Money as the payment gateway. Key shopping features • Advanced product search and filtering so visitors can drill down quickly. • A reliable shopping cart and checkout process with real-time price and inventory updates. • User reviews and ratings attached to each product for social proof. What I’d like from you 1. A...

    £7 / hr Average bid
    £7 / hr Avg Bid
    152 bids

    We want a finance tracking application with features Dashboard_Net worth summary_Total assets (cash + investments) minus liabilities (credit card outstanding) as one headline number. Auth & Onboarding_Sign up / Log in_Email + password, full validation. Server-side bcrypt hashing, per-device sessions. Auth & Onboarding_Profile capture at signup_Full name, DOB, income source, monthly income bracket, phone with country code selector. Auth & Onboarding_Email & phone OTP verification_Generate, expire, resend, attempt-limit flow — simulated pending a real SMS/email gateway. Dashboard_Monthly summary_Income, expenses, and net savings for the current month. Dashboard_Spending by category_Donut chart + breakdown list. Dashboard_Recent transactions_Quick-glance list of the ...

    £384 Average bid
    £384 Avg Bid
    107 bids
    AI Router Setup with Node.js
    5 days left
    Verified

    I'm looking for an experienced Node.js developer to set up an AI Router. This intelligent proxy will dynamically distribute Natural Language Processing requests across multiple free AI providers. Requirements: - Support for Natural Language Processing services - Input format: Plain text - Dynamic request distribution Ideal Skills and Experience: - Proficiency in Node.js - Experience with AI APIs and proxies - Strong understanding of NLP tasks - Ability to handle plain text input Submit a brief overview of your experience and approach to this project.

    £62 Average bid
    £62 Avg Bid
    78 bids

    I’m creating a companion-on-demand service that lets users book an “online rental boyfriend” quickly and discreetly, and I need a complete product that works seamlessly as both a website and a mobile app (iOS and Android). The heart of the product is a smooth booking flow: visitors browse available companions, select a time slot, confirm the rate, and pay securely in just a few taps. A real-time availability calendar, automated confirmations, and push/email reminders all need to be in place from day one so customers feel confident their booking is locked in. While the booking system is the must-have feature, I’d like the codebase and database schema structured so that user profiles and private messaging can be switched on later without a full rewrite. Clean modula...

    £12 / hr Average bid
    £12 / hr Avg Bid
    43 bids

    I’m putting together a straightforward location-tracking system for loads of non-perishable goods that move through warehouses, trucks, and rail cars. The core requirement is real-time position updates from departure to storage, with automatic alerts if a device signals potential theft. The hardware can be either single-use—so the receiver never has to return or recharge the tag—or a reusable unit that we can redeploy after each trip. I’ll need your help scoping both variants and producing an estimated cost per device for each. What I expect from you • A concise technical proposal outlining the recommended tracker form factor, network technology (e.g., GSM, LTE-M, NB-IoT, LoRaWAN), and back-end platform or API you plan to leverage. • A table or brie...

    £82 Average bid
    £82 Avg Bid
    96 bids

    I have an enterprise-grade, multi-vendor SaaS marketplace that is feature-complete on paper but still awaiting a green light for production. Before we release, I need an experienced Technical Project Manager or Technical Product Manager to give the entire platform a hard, independent review and drive it all the way to an unequivocal “ready” or “not ready”. Scope you will own • Perform a line-by-line review of the build against the existing SRS, challenging developers whenever implementation drifts from spec. • Orchestrate milestone planning and daily follow-ups with the current dev team so fixes, retests and regressions stay on schedule. • Design and execute full UAT: test every workflow, log defects in detail, and verify fixes. The goal is sim...

    £1203 Average bid
    £1203 Avg Bid
    52 bids

    I want a complete fitness tracking app built around my personal-trainer brand. The core of the project is to give each client a private login that opens a personalised dashboard where they can: • watch my step-by-step exercise videos and written how-to guides • read tailored nutritional information • fill out and submit workout-plan forms I create for them • upload their own progress photos and short videos so I can review technique and results An intuitive admin panel is essential so I can add new content, approve uploads, and track every client’s progress without touching code. Smooth UX on both iOS and Android is a priority, and the backend must be secure enough to handle sensitive health data as well as media files. Deliverables I need to see before...

    £242 Average bid
    £242 Avg Bid
    263 bids

    We are seeking a developer to create a Minimum Viable Product (MVP) for an innovative web platform. This platform aims to connect users to a network of healthcare partners, including doctors, clinics, laboratories, pharmacies, and other establishments. Essential functionalities for this first phase of the MVP include: - Complete registration and login system for users and partners. - Implementation of an administrative panel for platform management. - Creation of a specific panel for partners to manage their information. - Functionality for detailed registration of doctors, clinics, laboratories, pharmacies, and other partners. - Ability to register services, consultations, exams, and benefits offered by partners. - Option to display the regular price of services and the discounted price f...

    £343 Average bid
    £343 Avg Bid
    318 bids

    I am gaining peojects costs. This isnt our first app so we have some familiarity. App for Hunters hiker's outdoors people in general. Get back safe . There is no way currently without a Epirb or PLB to share with friends and family. Your exact coordinates. When you are due back and if things change a count down starts then will notify people. Also providing an sos app button. Our app will help all outdoors people and it will allow family friends or partners to know theyre exact location and if they fail to meet the requirements or check ins it will start to notify the appropriate contacts

    £1530 Average bid
    £1530 Avg Bid
    267 bids

    I’m building an online “rental boyfriend” service and need it available on the web as well as native iOS and Android apps. The core experience has to feel instant and personal, so an in-app live chat is the first feature I want working flawlessly. Users should sign up or sign in with their preferred social media account (Facebook, Google, or Apple are all fine), then jump straight into chatting with listed companions. What I already have in mind • A clean, swipe-style catalogue of profiles with photos, short bios, interests and hourly availability. • Real-time chat that supports text, emojis, read receipts and push notifications. • Admin tools that let me verify new “boyfriend” profiles, adjust availability calendars and step in to modera...

    £7 / hr Average bid
    £7 / hr Avg Bid
    36 bids

    Currently, each invoice request requires me to complete several steps. The guest sends me a message or calls me, provides their company details, which I then have to enter manually, locate the relevant reservation, issue the invoice in my invoicing software and send it by email. With seven apartments and a high number of bookings, this results in many additional tasks every month, while manually entering the information creates a risk of errors in the tax identification number, company name or address. My idea is to fully automate this process. The guest scans a QR code placed in the apartment, completes a short form and confirms the information using a link received by email. The system then automatically issues the invoice in invoicing software such as inFakt and sends it to the specifi...

    £400 Average bid
    £400 Avg Bid
    260 bids

    Summary WHAT TRYING TO DO OPEN TO FEEDBACK: The goal Get you retained as an expert witness more often by finding relevant lawsuits the day they're filed and letting the attorney know you're available — before they've gone looking for an expert. What we're building A small automated pipeline that runs every weekday morning: Trellis (a court-records service) emails you alerts about newly filed Texas cases matching your searches (med-mal, epidural injections, RFA, stimulators, radiculopathy, CRPS, concussion, trucking/spine injuries). n8n (a no-code automation tool) reads those alert emails, pulls out each case, and skips any you've already seen. Claude (AI) reads the case details and scores it 0–100 for fit with your practice, identifies the plaintiff ...

    £300 Average bid
    £300 Avg Bid
    247 bids

    need an experienced mobile and backend developer to build a digital loan application for India with a user experience and loan journey similar to Pocketly, but with completely original branding, UI/UX and source code. The app should allow customers to: Customer Features: Register/login using mobile number and OTP Create and manage a customer profile Apply for a loan Select loan amount and repayment tenure View estimated EMI/repayment schedule Upload required documents Integrate PAN and customer identity/KYC verification through an authorised third-party API Add and verify bank account details Track loan application status View approved loan details View repayment schedule and repayment status Receive notifications and reminders Admin Panel: Secure admin login View and manage customers View...

    £96 Average bid
    £96 Avg Bid
    26 bids

    I need an experienced mobile and backend developer to build a digital loan application for India with a user experience and loan journey similar to Pocketly, but with completely original branding, UI/UX and source code. The app should allow customers to: Customer Features: Register/login using mobile number and OTP Create and manage a customer profile Apply for a loan Select loan amount and repayment tenure View estimated EMI/repayment schedule Upload required documents Integrate PAN and customer identity/KYC verification through an authorised third-party API Add and verify bank account details Track loan application status View approved loan details View repayment schedule and repayment status Receive notifications and reminders Admin Panel: Secure admin login View and manage customers Vi...

    £120 Average bid
    £120 Avg Bid
    53 bids

    I have a complete, clean PostgreSQL database of a football club's entire match history — 120 years, roughly 6,900 matches, with lineups, goals, cards, players, managers, referees and venues. **The data work is finished.** I need a developer to build the website on top of it. There is a full written specification and a technical appendix documenting every table and data convention. Both go to shortlisted bidders. This is a well-defined build, not a discovery project. ### What exists already - A PostgreSQL 17 dump (~10 MB, 35 tables) that restores cleanly, with a documented schema - A working read-only reference viewer you can browse: **** - A ~15-page specification covering every page, every form, colours, and an acceptance checklist - A technical appendix covering data conven...

    £1575 Average bid
    £1575 Avg Bid
    229 bids

    I need a small-footprint Azure application, that I can deploy inside my tenant, that lets users upload a PDF of our “date effective” records and automatically pulls out the From Date and To Date. Here is the flow I have in mind: 1. Upload interface (simple web page or BLOB-triggered function) accepts a single PDF at a time. 2. Azure AI Document Intelligence handles the parsing. If extra text cleanup or disambiguation is required, feel free to chain Azure OpenAI behind it. 3. Your code pinpoints the first instance of the two labels (“from date” / “to date”) and captures the values in ISO format. 4. The result, together with a unique identifier we generate for that file, is inserted into an Azure SQL Database table. I will provide sample PDFs ...

    £22 Average bid
    £22 Avg Bid
    63 bids
    Android Partner & Admin Apps
    5 days left
    Verified

    I sell a range of services and products and now want a straightforward way to enlist referral partners. I need two linked Android apps—one for the partner and one for me as the admin. Partner app • Login must be by mobile number (OTP flow is fine). • After logging in, the partner sees a single form to capture the referral’s name, address, phone, and email. • The same screen should let the partner attach supporting documents (images or PDFs). • A small dashboard listing every referral the partner has submitted would be helpful so they can check status. Admin app • I should be able to view each partner’s submissions, open the attached files, and mark a referral as approved, rejected, or pending. • Basic search / filter by partner ...

    £91 Average bid
    £91 Avg Bid
    41 bids

    The AMC covers maintenance of a MERN stack-based website, including MongoDB, , React.js, and Node.js components. Included Services: • Bug fixing and issue resolution • Performance monitoring and optimization • Security patches and vulnerability fixes • Minor UI/UX enhancements • Server and database maintenance • Backup monitoring and recovery support • API monitoring and fixes • Third-party integration support • Changes in design, features, content, and images within existing pages are included in the scope • Development of a dynamic testimonial feature at no additional cost within AMC scope • Creation/addition of unlimited new pages (information-based/static pages/dynamic) will be included in the scope • Others to be included an...

    £181 Average bid
    £181 Avg Bid
    72 bids

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