Backend Development Jobs

Backend code is the part of a website or application that isn’t visible to the user. The code is a behind-the-scenes part of development, requiring a high level of competency regarding coding and the server that is being used. A backend developer works on the implementation and configuration of systems, and thus provides the building blogs for a website or program.

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    40 jobs found, pricing in GBP
    Build website backend 6 days left
    VERIFIED

    We are looking for a team to build the backend of a website for us. The team need to be familiar with one of this programming languages: * Python * NodeJS * Ruby The team also need to have experience using AWS services such as SQS, SNS, Lambda, ECS, RDS, DynamoDB, etc. The project also has several third party integrations.

    £3072 (Avg Bid)
    £3072 Avg Bid
    54 bids

    Hello, I searching Ruby on Rails expert to work on complex task.

    £5 / hr (Avg Bid)
    £5 / hr Avg Bid
    4 bids

    Hello, We are seeking long term RoR developers working on our project. - Work 5usd/hour (we are new company we can't pay above 5 usd) - Finish tasks on time - Communicate with team. If you don't answer our message we can't work.

    £4 / hr (Avg Bid)
    £4 / hr Avg Bid
    6 bids

    I need a freelancer experienced in css code and that can work quickly following a document and complete minor responsiveness issues in my website.

    £25 (Avg Bid)
    £25 Avg Bid
    45 bids
    £5 / hr Avg Bid
    26 bids

    I need a freelancer familiar with the Divi theme who can build a one page website for a builder that is fully dynamic.

    £35 (Avg Bid)
    £35 Avg Bid
    47 bids

    I need an existing Code or API. I don't have time for trial and error :) If you have an API, please provide the demo link. If you have the Code already done. Then I will purchase the Source Code. Kindly place your bids if you have the requirements.

    £11694 (Avg Bid)
    £11694 Avg Bid
    17 bids

    I need an iPhone and Android app. I would like it designed and built. The mobile app is for the website: https://thesdeals.com. The content in the app should be dynamically changeable from a backend application. The content will consist of images and text and would redirect to a website. Push notifications should be supported. Waiting for the offers. A PoC would be required.

    £669 (Avg Bid)
    £669 Avg Bid
    72 bids
    Dating App Completion 5 days left
    VERIFIED

    Hello Freelancers, Please consider this project carefully before bidding. 2 - If you have no reviews or previous work on Freelancer please do NOT bid 3 - Project Involves taking on existing code and completing project before 1st April 2020 4 - All current code provided to successful bidder. 5 - Bid will not be awarded to solo developers 6 - Please do not request work outside of Freelancer Develo...

    £1015 (Avg Bid)
    £1015 Avg Bid
    82 bids

    I want an mobile app in android and ios. The app will consists user, trainer side and an admin panel. Companies and freelancer are welcome to showcase their skills. The best and on time delivery will be chosen for the Project. Only Jaipur based are required. Thanks

    £1268 (Avg Bid)
    £1268 Avg Bid
    41 bids

    We are in the process of hiring a python developer. This posting is not for that. Our job description needs to include four questions that we can use to identify a competent developer. In particular, he needs to have a security background, as our product tracks python dependencies for vulnerabilities. Please send four question and answers. Ideally things that are not easily Googleable.

    £29 (Avg Bid)
    £29 Avg Bid
    2 bids

    We need assistance on a project, specifically: Setup NoSQL database (MongoDB) Take our architecture designs and implement the database API's need to be created to send data back/forth between the app and database Authentication as per the doc Testing to ensure it's bug-free Company/developer needs to be fluent in English We're developing an app to go with this and we will handle t...

    £2046 (Avg Bid)
    £2046 Avg Bid
    9 bids

    I am looking for senior web developer who has experience with Paytriot payment integration. Only need individual developer. Not team. More details will be shared via chat box.

    £104 (Avg Bid)
    £104 Avg Bid
    24 bids

    I need to build a mobile and web app, that is similar to certain review/rating website like justdial or ask.com. Key features of this app - 1. Allows posting reviews on other businesses 2. Reviews must be structured. Reviews/ratings can be liked, loved, disliked etc 3. Reviews/ratings can only be posted by members/users This is a long term project as it is a part of a larger app.

    £5 / hr (Avg Bid)
    £5 / hr Avg Bid
    18 bids
    whatsapp api integration 4 days left
    VERIFIED

    need to build platform for WhatsApp business

    £12 (Avg Bid)
    £12 Avg Bid
    1 bids

    We are looking for a Developer who can build a cryptocurrency payment gateway system which can be integrated to third party platform (Meta Quotes software (MT4/MT5) and other Financial / online Casino platform including CRM ) There will be backend and frontend, admin, affiliate, merchant portals, etc. We can provide you our idea. Please respond if anybody have done similar project. We request ...

    £5922 (Avg Bid)
    £5922 Avg Bid
    70 bids

    I need a knowledgable freelancer who will optimize back-end code to retrieve data, must implement the fastest method to retrieve records as speed is very important for my site. I need server response time under 200ms (requirement), current is about 2000~ms Analyze site speed and provide full report. freelancer needs to identify if issue is related to slow application logic, slow database querie...

    £190 (Avg Bid)
    £190 Avg Bid
    18 bids

    I am a Product Owner developing products using Scrum for past 10 years. I have an idea for a business of my own: Essentially it is a website where one user can list tasks to be done and other users search the tasks to be done and can bid for the work. There would be a CV / Job History element for both users. There would be the options to pay for tasks to be done (standard), barter (i.e. i do one t...

    £9 / hr (Avg Bid)
    £9 / hr Avg Bid
    3 bids

    I have the shell of a Shiny Dashboard and would like help with adding action buttons that allow for datatable to add/modify/delete entries. The data is initially read from .rds file and upon saving of changes the .rds file needs to be updated so that any subsequent reading from the .rds reflects the updated data. I will supply the ui.R/server.R/global.R scripts that I have as a shell for code to b...

    £50 (Avg Bid)
    £50 Avg Bid
    7 bids

    We are looking for a Developer who can build a cryptocurrency payment gateway system which can be integrated to third party platform (Meta Quotes software (MT4/MT5) and other Financial / online Casino platform including CRM ) There will be backend and frontend, admin, affiliate, merchant portals, etc. We can provide you our idea. Please respond if anybody have done similar project. We request ...

    £6034 (Avg Bid)
    £6034 Avg Bid
    40 bids
    LinkedIn like system 3 days left
    VERIFIED

    We are looking for LinkedIn like system for uob postings and job applications along with news feed, job pages and applicant profiles similar to LinkedIn Please submit the demo urls

    £3544 (Avg Bid)
    £3544 Avg Bid
    47 bids

    We are a bootstrapped startup in software sale and marketing business. we need a CTO to handle tech end of the startup. No salary is offered. Just equity in the startup. Candidate must be well versed with various stack and master in one or two.

    £11 (Avg Bid)
    £11 Avg Bid
    2 bids

    Java Spring Boot Developer with Angular 7 experience needed for 2 days . Must have experience with Gradle, Angular 7 and SpringBoot. Have some major improvements and changes in project. Need to complete all.

    £83 (Avg Bid)
    £83 Avg Bid
    12 bids

    Zecide models human reactions to market events to produce structured financial analysis and data science tools for traders. So we need to build a backend for something similar to social media platform, also having ML models deployed. Rest can be discussed.

    £108 (Avg Bid)
    £108 Avg Bid
    1 bids

    i need a man who can build website, give back links. expert in S.E.O & Digital Marketing

    £2 / hr (Avg Bid)
    £2 / hr Avg Bid
    19 bids
    Ruby on Rails Developer 1 day left
    VERIFIED

    We are looking for a Ruby on Rails developer co-founder for our tech startup. Experience with databases is required. Thanks!

    £835 (Avg Bid)
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    27 bids

    Deliverable: Development of server side component for communicating with the Concox GPS devices – involving full protocol implementation and post-processing of data received. Good fit for job: Someone who is aware of client-server protocol development using Java

    £380 (Avg Bid)
    £380 Avg Bid
    2 bids

    I need an existing Code or API. I don't have time for trial and error :) If you have an API, please provide the link. If you have the Code already done. Then I will purchase the Source Code. Kindly place your bids if you have the requirements.

    £32070 (Avg Bid)
    £32070 Avg Bid
    27 bids

    App and website are already developed but not ideal. Need someone based in Singapore to take over development and maintenance.

    £20 / hr (Avg Bid)
    Local
    £20 / hr Avg Bid
    22 bids

    We need frelancer that already have experienced in make payment gateway system like midtrans or doku in indonesia. Please bid this project if you have experienced work this project before

    £1193 (Avg Bid)
    £1193 Avg Bid
    25 bids
    Guest Post Selling Marketplace 13 hours left
    VERIFIED

    Full details of the project are included in the attached file. We will ignore automated bids. We will require interested parties to submit a plan on how they will go about delivering the project.

    £28344 (Avg Bid)
    £28344 Avg Bid
    37 bids

    hello, I need a booking page in my wix website, Full website is created just need one booking page. I will provide the reference site, It must be a multistep booking in which when a person select a service price automatically increase

    £14 (Avg Bid)
    £14 Avg Bid
    3 bids
    PHP Web Developer 4 hours left
    VERIFIED

    NearshoringID is a startup based in Bali, Indonesia that focuses on providing end-to-end solutions for companies based in Europe, Australia, and the U.S. We are looking for talented PHP Web Developers for a full-time OR freelance position, are you ready for a new challenge and grow professionally? Apply! Qualifications - Minimum of 2 years of experience as a PHP backend developer, and Jav...

    £1616 (Avg Bid)
    Local
    £1616 Avg Bid
    11 bids

    Need geo location redirects between USA and Canada. (Wordpress sites) Is it possible to detect IP address and redirect user to local specific website?

    £337 (Avg Bid)
    £337 Avg Bid
    33 bids

    Queremos mejorar nuestra página, tiene algunos inconvenientes de links quebrados, Buscamos una página más práctica para nuestros clientes, en ella tenemos, servicios, clientes con que hemos trabajado, datos de contacto y queremos incluir un chat, necesitamos que la parte de servicios pueda incluirse de más servicios o reorganizarlos, y en la parte de clientes que...

    £129 (Avg Bid)
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    23 bids

    Somos uma futura empresa voltada a ensino e buscamos um profissional para fazer o back-end, implementar um Dashboard e implementar alguns recursos no front-end.

    £379 (Avg Bid)
    £379 Avg Bid
    7 bids
    realidad aumentada 3 days left
    VERIFIED

    busco frelancers o equipos o consultoras que tengan experiencia en apps usando la realidad aumentada. Solo contantarse si tienen una app con realidad aumentada y dejar el link para revisarla Se requiere para hacer una app para un cliente que quiere dejar ciertas señales dentro de un salon y segun ella salgan, videos, textos, preguntas segun el taller de entrenamiento que se esta haciendo,...

    £478 (Avg Bid)
    £478 Avg Bid
    12 bids
    site de matematica 3 days left
    VERIFIED

    .As dori crearea unui site web gen projecteuler.net. Functionalitatile la fel . Designul schimbat . In mare parte este vorba despre creearea unui site cu probleme de matematica . Utilizatorul sa poata da raspuns intr-un textbox(tastatura matematica) la problemele publicate de mine , iar daca raspunsul este corect la problema sa bifeze problema din tabel. Clasamente in functie de numarul de prob...

    £249 (Avg Bid)
    £249 Avg Bid
    8 bids

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