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Devinkumar T.

5.0

256

7.9

99%

Rajkot, India

$20 USD per hour

I have a great track of delivering great websites and web apps for clients. Look for me for getting your business website, eCommerce store, or any custom website designed and developed. I have more than 10 years of experience with all parts of project life cycle including business analysis, requirements specification, design, development, testing and maintenance. I am an Expert delivering: • Custom WordPress Plugins(for any level of Complexity) • API Integration with WordPress and WooCommerce stores • Customizing any plugin, no matter how complex it is. Other Services I can provide: • PHP Website Development • PHP Web Application Development • eCommerce store development • API Integration • Website Design • Graphic Design Looking for an excellent service provider for your next project? Let’s start its discussion right now. Use the form on the right side to hire us, and I'll make sure to deliver the best project for you. Looking forward to work with you. - Devin

OAuth PHP JavaScript Project Management AJAX

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Kolte Technologies

5.0

717

10.0

98%

Surat, India

$25 USD per hour

We are a team of highly skilled developers with expertise across a wide range of technologies, frameworks, and platforms. Our experience spans enterprise applications, custom software solutions, web and mobile platforms, blockchain, and NFT-based projects. Technical Skill Set - Microsoft Technologies: Asp.Net, MVC, C#, .Net Framework, .Net Core (3.1, 5, 6, 7, 8+), Blazor Web/Server - UI & Testing: Selenium Web UI Testing, Telerik Controls, Kendo UI, DevExpress, Angular, AngularJS (2/4/7/10+), TypeScript - Enterprise Platforms: SharePoint, Power Automate - Web & CMS: WordPress, WordPress Plugin Development, NopCommerce (Plugins, Customizations, Theme Development) - Open Source & Frameworks: PHP, Laravel, CodeIgniter, MERN Stack, React JS, Angular, Next JS - Frontend Technologies: JavaScript, jQuery, CSS, HTML - Databases: MySQL, SQL Server, PostgreSQL, Oracle - API Development & Integrations: Web API 2, REST API, Microservices, SOAP, Social Network APIs - Logistics & Finance Integrations: UPS, FedEx, DHL, DPD Shipping APIs, QuickBooks API Integration - Collaboration & Automation: Zoom API (automation, scheduling, reminders), File Sync & Sharing solutions with Azure Blob Storage - Blockchain & NFT: Smart Contract Development, NFT Marketplace Solutions, Token Creation & Management, Wallet Integration, Blockchain-based dApps Our Promises * Regular Communication * Daily & Weekly Work Updates * 100% Guaranteed Stress-Free Work * Guaranteed Data Security & Privacy * Adopted Agile Development Methodology * Mature Technology & Process Expertise Engagement Models * Fixed Cost * Time & Material (Hourly) * Dedicated Team * Hybrid Model (Fixed + Hourly)

OAuth PHP ASP JavaScript Visual Basic

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Narola Infotech

4.7

2156

10.0

97%

Surat, India

$15 USD per hour

⭐ Top 1% on Freelancer.com | Narola Infotech - Digitalising Businesses Since 2005 ✎ About Us We are Narola Infotech, a globally recognized IT solutions company with 20+ years of experience delivering high-performance web, mobile, and enterprise software solutions to 1500+ happy clients across 50+ countries. Trusted by Fortune companies like CGI, L&T, Infosys, Biocon, and TVSNext. We don't just build software, we build lasting partnerships. Our approach is simple: understand your vision, deliver beyond expectations, and stay with you every step of the way. ✎ Why Choose Us? ➬ 20+ Years of Industry Experience ➬ 350+ Talented IT Professionals ➬ 3000+ Successfully Delivered Projects ➬ 95% Client Retention Ratio ➬ 4.9 ⭐ Clutch Rating ➬ 100% Project Success Ratio ➬ Clutch Top 1000 Companies Global 2022 ➬ Best Outsourcing Company - SGCCI ✎ Our Services ➬ Custom Web & Mobile App Development ➬ Custom Enterprise Software Development ➬ AI/ML & Data Analytics Solutions ➬ QA & Software Testing (Automation, Security, Performance) ➬ DevOps, Cloud Migration & Managed Services ➬ Salesforce Consulting, Implementation & Support ➬ Staff Augmentation - Dedicated Teams or Individual Developers ➬ Support & Maintenance ✎ Tech Stack ➬ Frontend: ReactJS, AngularJS, VueJS, NextJS, NuxtJS ➬ Backend: Node.js, Java, PHP, Laravel, .NET, Python, Django, WordPress ➬ Mobile: Flutter, React Native, iOS (Swift), Android (Java/Kotlin) ➬ Cloud & DevOps: AWS, Azure, Docker, Kubernetes, Jenkins, CI/CD, Terraform ➬ Database: MySQL, MongoDB, PostgreSQL, Firebase, MS-SQL ➬ Other: Salesforce, MS Dynamics 365, Power Platform, Big Data, AI/ML, Automation ✎ Industries We Serve ● Fintech ● Healthcare ● Retail & Ecommerce ● Education ● Real Estate ● Media & Entertainment ●Transport & Logistics ✎ Our Strengths ➬ Agile Development Methodology ➬ Daily & Weekly Progress Reports ➬ Clear Communication & Collaboration ➬ 100% Plagiarism-Free & Secure Delivery ➬ Guaranteed Data Privacy & NDA Protection ➬ Flexible Engagement Models: ● Fixed Cost ● Time & Material (Hourly) ● Dedicated Team ● Hybrid Model (Fixed + Hourly) ✎ Our Promise "You will get the value of every penny you spend. We are committed to driving your business forward with reliable, quality solutions powered by technology and innovation." - Ashish Narola, CEO

OAuth PHP ASP Java JSP

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Iryna S.

5.0

1596

8.4

99%

Quinte West, Canada

$30 USD per hour

Fast & Efficient Tecrific Service "Quality is never an accident; it is always the result of high intention, sincere effort, intelligent direction, and skillful execution; it represents the wise choice of many alternatives." I am a full-stack developer with extensive experience building modern, scalable, and high-performance web applications. From frontend user experiences to backend architecture, APIs, databases, cloud infrastructure, and deployment pipelines, I provide end-to-end development solutions tailored to business needs. My expertise includes designing and developing responsive web applications, integrating third-party services, optimizing performance, troubleshooting complex technical issues, and maintaining reliable production environments. I focus on writing clean, maintainable code and delivering solutions that are robust, scalable, and built for long-term success. I take pride in clear communication, attention to detail, and delivering projects on time. I am committed to providing exceptional service and going the extra mile to ensure every client is satisfied with the final result. My reputation is built on reliability, professionalism, and consistently delivering high-quality work.

OAuth PHP C Programming Java JavaScript

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STALLIONi NET SOLUTIONS

4.8

983

9.6

98%

coimbatore, India

$12 USD per hour

Welcome to STALLIONi Net Solutions — a trusted web development team with 18+ years of experience and 900+ reviews on Freelancer.com. We build digital solutions that work — on time, on budget, and exactly as promised. What We Do: • Web Design & Development — HTML, CSS, JavaScript, ReactJS, AngularJS • Backend Development — PHP, Laravel, CodeIgniter, Node.js • CMS & eCommerce — WordPress, Shopify, Magento, Joomla • CRM & Automation — Zoho CRM, GoHighLevel, Zapier, QuickBase • Mobile Apps — iOS & Android (native & cross-platform) • AI & Python — Chatbot development & smart integrations • Graphic Design — Branding, UI/UX, digital assets Whether you're launching a new product, scaling an existing platform, or automating your business workflows — we bring the technical depth and communication skills to get it done right. Let's build something great together. + Team STALLIONi

OAuth PHP C Programming Java JSP

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Dev. Team Online

4.9

775

8.3

94%

Karachi, Pakistan

$25 USD per hour

We build AI-powered software systems, intelligent automation workflows, AI agents, MCP servers, and scalable SaaS platforms for startups, agencies, and enterprises. Our expertise includes AI agent architecture, workflow automation, OpenAI integrations, multi-agent systems, MCP server development, CRM automation, business process automation, and enterprise-grade web applications. We help businesses automate operations, reduce manual work, improve customer experience, and scale faster using modern AI technologies. 🚀 Core Expertise: ✔ AI Agents & Autonomous Systems ✔ MCP Server Development ✔ OpenAI, Claude & Gemini Integrations ✔ AI Chatbots & Assistants ✔ n8n & Workflow Automation ✔ AI CRM & Business Automation ✔ SaaS Platforms & Enterprise Applications ✔ Laravel, React, Node.js & APIs ✔ Multi-Tenant Architectures ✔ Cloud Infrastructure & DevOps 💡 We specialize in: • AI-powered CRM systems • AI customer support agents • Business workflow automation • AI lead qualification systems • AI dashboards & analytics • AI-enhanced marketplaces • AI-integrated ERP/CRM platforms • Voice AI & AI chat systems • Custom MCP server implementations Our focus is delivering scalable, secure, maintainable, and revenue-driven AI software solutions with long-term business value.

OAuth PHP ASP C Programming Java

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Eplanet Soft

4.8

753

8.6

98%

JAIPUR, India

$40 USD per hour

Eplanet Soft is a web/mobile app solutions company which specializes in Web design and development, Mobile App Development and SEO Services creating a strong brand presence and providing expert training in the field of web/mobile development and related technologies. We work on projects related to Core PHP, Laravel, Cake PHP, Wordpress, Opencart, Magento, Joomla, Android, E-Commerce, HTML, HTML5, CSS, CSS3, Bootstrap Designs and many more. We have worked for more than 600+ clients already and all are very much happy with services. Our Office timings as per GMT +5.30 are Morning 10 A.M. to 7 P.M. We always focus on maintaining long-term as well as healthy relationships between clients.

OAuth PHP JavaScript Python Website Design

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Dimitris K.

5.0

730

7.9

99%

Athens, Greece

$55 USD per hour

A Linux Administrator with 10+ years of expertise in Redhat / Centos / Ubuntu / Debian/ Aws /Google Cloud / Linux / Docker / Ansible / Plesk / CPanel

OAuth PHP Script Install System Admin Linux

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Sandiya Solutions

4.8

616

8.1

98%

Pali, India

$8 USD per hour

Website Development | Digital Marketing | 15+ Years | 600+ Reviews Hi, I’m Raj Kumar – a digital expert with 15+ years of experience in Web Design, Development, and Complete Digital Marketing (SEO, SMM, SMO, PPC, etc.). ✅ MERN STACK Development ✅ Custom Web Design & UI/UX Development ✅ WordPress, WooCommerce, Shopify & Magento ✅ HTML, CSS, Bootstrap, JavaScript, jQuery, PHP ✅ Full-Suite Digital Marketing: SEO, SMO, SMM, PPC ✅ Speed Optimization & Mobile-Responsive Design ✅ Long-Term Support, Maintenance & Upgrades I lead a professional team of skilled designers and developers delivering high-quality, budget-friendly solutions tailored to your business goals. We’re committed to: ✔️ 100% Client Satisfaction ✔️ Timely Delivery & Communication ✔️ Long-Term Collaboration Let’s connect to discuss how I can help bring your project to life with creative design and growth-focused marketing strategies. Message me today — I’d love to hear more about your project! Best Regards, Raj Kumar Sandiya Solutions

OAuth PHP JavaScript Website Design Graphic Design

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Clients rate our OAuth Developers

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from 21,679 reviews

How to hire a great freelance OAuth Developer

An OAuth developer is a software engineer who designs, implements, and secures authentication and authorization flows using the OAuth 2.0 and OpenID Connect protocols. These specialists build the token-based systems that let users sign in with third-party accounts, grant scoped API access, and protect resources across web, mobile, and machine-to-machine applications.

What an OAuth developer delivers

Hiring an OAuth developer means getting a working, standards-compliant identity layer for your application. The deliverables are concrete: authorization servers, client integrations, token validation middleware, refresh-token rotation logic, and consent screens that meet regulatory requirements. Done right, OAuth implementation reduces password risk, enables single sign-on across products, and lets your APIs expose granular permissions to partners and users.

Poor OAuth work creates breaches, broken logins, and audit failures. That is why buyers look for engineers who understand the protocol at the RFC level, not just developers who have copy-pasted a library example.

Core services and deliverables

An OAuth specialist typically handles end-to-end identity work, including:

Implementing OAuth 2.0 grant types — authorization code with PKCE, client credentials, device authorization, and refresh token flows

Building OpenID Connect (OIDC) layers for federated identity and ID token issuance

Integrating social and enterprise identity providers such as Google, Microsoft Entra ID, Apple, GitHub, and Facebook Login

Configuring identity platforms like Auth0, Okta, Keycloak, AWS Cognito, Firebase Authentication, and ForgeRock

Writing JWT validation, JWKS rotation, and signature verification middleware

Designing scope models, consent screens, and role-based access control (RBAC) tied to access tokens

Hardening flows against CSRF, token replay, mix-up attacks, and open redirect vulnerabilities

Implementing SAML-to-OAuth bridges and SCIM provisioning for enterprise SSO

Migrating legacy session-based auth to token-based architectures

Producing documentation, Postman collections, and SDK samples for downstream API consumers

Tools, libraries, and frameworks

OAuth developers work fluently across the identity tooling ecosystem. Common libraries and platforms include Auth0, Okta, Keycloak, IdentityServer (Duende), Spring Security OAuth, Passport.js, NextAuth, MSAL, AppAuth, AWS Cognito, Firebase Authentication, and Ory Hydra. On the cryptography and token side, expect work with JWTs, JWS, JWE, JWKS endpoints, mTLS client authentication, and DPoP. Strong candidates also know how to test flows with tools like Postman, Burp Suite, and OpenID Connect conformance suites.

Industries and use cases

OAuth implementation work spans almost every sector that ships APIs or user accounts. Common engagements include fintech apps requiring strong customer authentication and Open Banking compliance, healthcare platforms needing HIPAA-aligned access controls, SaaS products onboarding enterprise customers through SSO, e-commerce marketplaces issuing partner API keys, IoT and connected-device fleets using the device authorization grant, and gaming or media services federating identity across platforms.

How to evaluate OAuth developer candidates

Identity work is unforgiving — small mistakes become security incidents. Look beyond generic backend experience for these signals:

Direct experience with the specific identity provider you plan to use (Auth0, Okta, Keycloak, Cognito, etc.)

A portfolio of shipped integrations: social login, enterprise SSO, partner APIs, mobile auth flows

Familiarity with current OAuth 2.1 best practices, PKCE for all clients, and the OAuth security BCP

Working knowledge of OpenID Connect, SAML, and SCIM for enterprise customers

Ability to threat-model their own implementations and explain trade-offs

Sample interview questions to copy and use:

Walk me through the authorization code flow with PKCE. Why is PKCE now required even for confidential clients?

How would you securely store refresh tokens in a single-page application versus a native mobile app?

What is the difference between an access token and an ID token, and when should each be used?

How do you validate a JWT issued by an external identity provider, and how do you handle key rotation?

Describe how you would design scopes and consent for a public API that third-party developers will integrate with.

Why hire OAuth developers on Freelancer.com

Freelancer.com gives you access to a global pool of identity and security engineers, from independent specialists who have built auth for fintech startups to senior architects who have run enterprise SSO programs. You can compare proposals side by side, review verified ratings, and see portfolio evidence of past OAuth and OIDC work before you commit. Clients set their own budgets and receive competitive bids, and Milestone Payments hold funds securely until each deliverable is approved. Whether you need a quick social login integration or a full custom authorization server, freelancers on Freelancer.com are ready to bid on your project.

Ready to secure your application's identity layer? Post a project on Freelancer.com today and connect with skilled OAuth developers ready to deliver standards-compliant, production-ready authentication and authorization.

What are the steps to hiring a freelance OAuth developer?

Hiring an OAuth developer is straightforward when your brief is precise. Identity work depends on protocol details — grant types, providers, token formats — so the more specific you are upfront, the better the bids you receive. The process below walks through posting your project, reviewing proposals, and awarding the work.

Step 1: Post your project on Freelancer.com

The project post is the single biggest determinant of bid quality. A clear OAuth brief filters for engineers who actually understand identity work, rather than generalists guessing at the scope. Head to the post project page , where you fill in the brief, scope, timeline, and budget before publishing the project for freelancers to bid on.

The OAuth grant types you need (authorization code with PKCE, client credentials, device flow, etc.)

Your identity provider or platform (Auth0, Okta, Keycloak, Cognito, Firebase, custom)

Application types involved — web, single-page, native mobile, machine-to-machine, or IoT

Compliance constraints such as HIPAA, PCI DSS, GDPR, or Open Banking requirements

Existing stack and frameworks (Node, .NET, Spring, Django, Rails) and any legacy auth being replaced

Timeline, milestones, and budget range so bidders can scope realistically

Step 2: Review bids from freelancers

Bids are short proposals, not just price quotes. Each one reveals how the freelancer interprets your brief, what approach they would take, and whether they understand the protocol nuances of your use case. Read carefully and shortlist candidates whose technical reasoning matches the work.

Clarity on which OAuth grant type and flow they recommend, and why

Specific references to libraries, SDKs, or identity providers relevant to your stack

Smart clarifying questions about scopes, token lifetimes, or session handling

Realistic timelines that account for testing, staging deployment, and security review

Sample work, GitHub repositories, or case studies demonstrating prior OAuth or OIDC implementations

Use Freelancer.com chat to ask follow-up questions on threat modeling and token storage before shortlisting

Step 3: Evaluate freelancers and award the project

The final decision combines proposal quality with profile evidence. For OAuth work, consistency matters more than a single impressive case study — you want someone who has shipped secure auth repeatedly. Weigh portfolio depth, written reviews from past identity projects, and verified credentials together.

Portfolio relevance — prior work with the same identity provider, language, or compliance regime

Star ratings and the volume of completed projects on Freelancer.com

Written client reviews mentioning security, code quality, and on-time delivery

Verified payment method and high project completion rate

On-time delivery rate, especially on past security-sensitive engagements

Award the project and use Milestone Payments to release funds only as each deliverable — discovery, implementation, testing, documentation — is approved

What is the difference between OAuth and OpenID Connect?

OAuth 2.0 is an authorization framework — it issues access tokens that let an application call an API on a user's behalf. OpenID Connect is an authentication layer built on top of OAuth 2.0 that adds an ID token, making it possible to verify who the user is, not just what they can do.

Do I need an OAuth developer or a general backend developer?

If your project is purely a quick library install with default settings, a strong backend generalist may handle it. For custom authorization servers, multi-tenant SaaS SSO, partner API programs, or anything touching financial or health data, hire a specialist who understands the OAuth security BCP, token binding, and threat modeling.

How long does an OAuth integration project take?

A straightforward social login or single identity provider integration can be completed within days. Building a custom authorization server, migrating legacy authentication, or rolling out enterprise SSO with provisioning typically takes several weeks and involves staging, security testing, and documentation phases.

Can an OAuth developer also handle SAML and enterprise SSO?

Most experienced OAuth developers also work with SAML 2.0 and SCIM, since enterprise customers commonly require those protocols. Confirm this in the proposal — ask for examples of SAML integrations and identity provider federation they have shipped.

Can I hire an OAuth freelancer for a one-off security audit?

Yes. Many OAuth specialists offer audit-only engagements, reviewing your existing flows for issues like missing PKCE, weak token storage, scope misuse, or insecure redirect handling. The deliverable is typically a written report with prioritized remediation steps.