Hire the Best OAuth Developers

Clients rate our OAuth Developers
Rating is 4.8 out of 5.
4.8/5
Based on 397 client reviews
Joe K.

St. Louis, Missouri

$130/hr
4.8
162 jobs

25+ years exp. - Full stack web developer, integrity is one of my core values. If you are looking for someone you can trust who has been building custom web solutions successfully for a long time, look no further. AI model integration, machine learning APIs, Stripe connect and custom Stripe checkouts, automated testing with AI. I build with the TALL stack ( Tailwind, Alpine, Livewire, Laravel ) and use Filmanetphp for rapid panel development. I've also built many custom WordPress plugins. AI augmented - I'm a claude code power user and Cursor is my IDE for fine tuning. I tend to have 2-3 AI coding assistant processes running at any given point in my workflow - for maximum productivity. I closely review generated code and pay tons of focus when/where needed. From one of my favorite reviews I've received here on Upwork - "I've never met such a skilled developer. I mean, we are talking world-class ladies and gentlemen! You are not going to discover a better developer anywhere else." -- Some recent projects; - Built a multi-tenant SaaS for scout troops, AI chatbot with API access to all the troops data like upcoming events, scout advancement progress, etc - Build an app that has a csv importer for companies, calls multiple APIs for gathering data about key people and uses LLM to generate targeted sales copy - Built an API for voice to text transcriptions to run on a local network machine - Setup local network open weights models for unlimited use without paying for tokens - Built a sales management system for an auto insurance dealer ( so his sales people could login, enter a sale, and commissions could also be tracked ) - Built a social network type app with courses and badges, a bit like linked in but focused on fast moving and fast shifting careers. - Built a platform for folks to promote their favorite business' and earn commissions. - Built a custom web application billing system for a contractor / sub - contractor service provider company that has dashboards for clients and vendors with billing and split payments so contractor earns platform fee. -- - "Joseph was kind, responsive, quick, direct, and receptive to feedback. If you have worked with other developers, you know how rare this is, and how important it is to find someone who truly cares about the quality of work they provide. He couldn't have been better to work with." "Joe is incredibly talented and an absolute pleasure to work with. He is our go-to guy for a variety of challenges and we have full confidence" "I really enjoyed working with Joseph. He was honest and direct with his communication. He didn't try to oversell his services. It was all about just getting the job done, doing it well, and communicating with me about what was going on throughout the whole process." - --- Ultimately, good web dev service consists of not only coding, but also translating your needs into solutions, communicating effectively, training you how to use the software, and giving you confidence along the way. I'm here for my clients to find their way through web dev projects. If there is anything I can't do, I'm happy to handle bringing in help on that specialty. I will be honest with you. My skills include but are not limited to; - Web App development - Laravel development - WordPress plugin development - Stripe integrations - Payment gateways - E-commerce - API integrations - AI automation I'm able to help with system design and database design, user experience, and optimization. I offer functionality consulting and can help prepare detailed requirements documents for larger projects. I do my best to provide ideas to solutions - when there is no clear path, a bit of research and some creativity can go a long way. Contact me to discuss your needs!

  • OAuth
  • Custom PHP
  • Stripe
  • jQuery
  • PHP
  • WordPress Plugin
  • WordPress
  • Laravel
  • API Integration
  • Web Development
  • Payment Gateway Integration
  • API Development
  • Plugin Development
  • API
Gaurav Kumar S.

Lucknow, India

$30/hr
4.9
258 jobs

Salesforce Ridge Consulting Partner. 1,000+ projects across 12+ countries, 40+ certifications. I help mid-market & enterprise teams ship Salesforce that drives ROI. We're AnavClouds Software Solutions — a Salesforce Ridge Consulting Partner headquartered in India, serving clients across the US, UK, Canada, Australia, EU, and Middle East since 2016. What we deliver: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔹 SALESFORCE CONSULTING • Service Cloud, Sales Cloud, Experience Cloud, Marketing Cloud • Service Cloud Voice + Omni-Channel implementations • Apex, LWC, Flow Builder, custom integrations • Einstein AI, Agentforce, Data Cloud • AppExchange product development 🔹 AI & ANALYTICS (AnavClouds Analytics.ai) • Custom voice bots & conversational AI • LLM integrations (Claude, GPT, custom RAG pipelines) • AI-powered project management & sales automation • Predictive analytics & dashboards 🔹 STAFF AUGMENTATION • Dedicated Salesforce developers, admins, architects • Flexible engagement: hourly, monthly, project-based • Onshore PM + offshore delivery model Why teams hire us: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✓ Ridge-tier Salesforce Partner (top-rated by Salesforce) ✓ 40+ active certifications across Service, Sales, Marketing, Platform Dev ✓ 1,000+ successful projects, 12+ countries ✓ Daily standups, weekly demos, full Jira/Slack transparency ✓ India HQ + flexible timezone overlap with US/UK/AU clients ✓ NDA-ready, ISO-aligned delivery process Best fit for: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ - Companies migrating to or scaling on Salesforce - ISVs building AppExchange products - Support orgs needing Service Cloud Voice / contact center on Salesforce - Founders building AI products who need engineering muscle - Teams needing reliable offshore Salesforce talent Let's talk — share your project, get a free 30-min discovery call + scoping doc.

  • OAuth
  • AJAX
  • HTML5
  • JavaScript
  • AngularJS
  • jQuery
  • Bootstrap
  • Java
  • PHP
  • Payment Gateway Integration
  • Apex
  • DHTML
  • Salesforce App Development
  • jQuery Mobile
  • Salesforce CRM
Narinder S.

Patiala, India

$25/hr
5.0
29 jobs

I am a full-stack .Net and SQL Server developer with 10+ years of experience. I have extensive experience in developing and maintaining large applications and data warehouse. I have architectured Microservices, N-TIER layer large applications. Backend:- ✅C# ✅ASP.NET MVC ✅.Net Core ✅Entity Framework ✅ADO.NET ✅Dapper ✅oAuth ✅RESTFUL Web APIs ✅Depdency injections ✅Unit of work ✅Repository pattern ✅Unit testing ✅Integration testing ✅Linq to Sql Frontend:- ✅HTML/Css ✅Bootstrap ✅jQuery/Javascript ✅TypeScript ✅Knockout js ✅React ✅Require js Database:- ✅NOSQL ✅MYSQL ✅MSSQL ✅POSTGRESSQL Third party integration:- ✅DevExpress ✅Telerik ✅Kendo ✅Email service ✅Payment gateway ✅SMS gateway Cloud Server: SQL Azure, Azure, AWS. Tools:- ✅VSO ✅Github ✅Bitbucket ✅Trello ✅Jira ✅Monday Methodology: ✅Scrum ✅Agile Principles, I following SOLID, DRY, TDD (XUnit/NUnit, Moq/NSubstitute, Autofixture). My objective is to provide cost effective and high quality solutions and provide highest quality of service in every phase of Client Relationship. Thanks

  • OAuth
  • Database
  • ASP.NET MVC
  • AWS OpsWorks
  • Azure DevOps
  • Payment Gateway Integration
  • ASP.NET Web API
  • ASP.NET
  • ASP.NET Core
  • SQL
  • Entity Framework
  • MongoDB
  • C#
  • API
  • Microsoft Azure
  • Docker
  • n8n
  • .NET Core
  • .NET Framework
  • Cloud Development
Mirza Z.

Karachi, Pakistan

$15/hr
4.2
36 jobs

As a highly accomplished Full Stack Developer with over 7 years of extensive experience in the software development industry, I am adept at utilizing a wide range of technologies, including .NET Core, Asp.net, Wordpress, WooCommerce ,Python, Node.js, React.js, Vue, Angular, PHP, GraphQL, C#, and Laravel. My expertise in front-end and back-end development, as well as my proficiency in database management and optimization, allows me to create high-performance, scalable, and robust web and software solutions that are tailored to meet the specific requirements of my clients. I possess a comprehensive understanding of automation tools and frameworks such as Ansible, Selenium, Playwright, Puppeteer, and BeautifulSoup, which I effectively employ to improve efficiency, reduce costs, and automate repetitive tasks. My proficiency in data scraping and analysis, coupled with my ability to deliver projects on time and within budget, further enhances my value as a developer. In addition to my technical skills, I am well-versed in system administration, network protocols, and cloud-based environments such as AWS and Azure. I have a thorough understanding of Linux and Windows operating systems, and have experience utilizing Git, Jenkins, and JIRA for version control and project management. I am an expert in Agile methodology, and possess a keen analytical mind, which allows me to quickly identify and solve complex problems. As a full-time freelancer, I am dedicated to providing exceptional service to my clients. I am highly responsive, maintain open lines of communication at all times, and am committed to delivering value and earning the trust of my clients. I am also committed to continuously enhancing my skills and knowledge through ongoing education and professional development. ⚫Experience: ⚪10+ years of experience in web and software development. ⚪Strong understanding of front-end and back-end development ⚪Strong understanding of automation tools and technologies ⚪Experience with API integration ⚪Experience with system administration and network protocols ⚪Experience with Git, Jenkins, and JIRA for version control and project management ⚪Proficient in Linux and Windows operating systems ⚪Experience working with cloud-based environments such as AWS and Azure ⚪Strong analytical and problem-solving skills ⚪Strong analytical and problem-solving skills ⚪Experience with Agile methodology ⚫Skills: ⚪Programming Languages: C#, Python, PHP, JavaScript ⚪Front-End Technologies: React.js, Vue.js, Knockout.js, Tailwind, GraphQL, Next. ⚪Back-End Technologies: Node.js, Express.js, Laravel, .NET, GraphQL, Asp.net. ⚪Automation Tools and Technologies: Selenium, Playwright, Puppeteer, TestNG, JUnit, Appium, Calabash, etc. ⚪Databases: MySQL, MS SQL Server, PostgreSQL, Redis, MariaDB, SQLite, DynamoDB, MongoDB ⚪Cloud: AWS, Azure, Google Cloud Why choose me over other freelancers? ✅ I will spare no time nor effort to deliver high-end results as fast as possible. ✅I will suggest improvements once I spot any ✅I am extremely responsive and always keeping all lines of communication readily open with my clients ✅I focus on providing value to all of my clients and earning their trust ✅ I am a full-time freelancer which means you'll find me almost 24/7 online and ready to work "Excellence endures long after the cost is forgotten" is a phrase that embodies my commitment to producing exceptional outcomes.

  • OAuth
  • Cloud Computing
  • PHP
  • GraphQL
  • .NET Core
  • AWS Lambda
  • Serverless Stack
  • React
  • Node.js
  • JavaScript
  • ASP.NET Core
  • Microsoft Azure
  • Vue.js
  • API Integration
  • SOAP
Sharjeel M.

Lahore, Pakistan

$40/hr
5.0
174 jobs

I help businesses automate operations, improve CRM workflows, connect their tools, and build reliable web systems that save time, reduce manual work, and make the business easier to run. My work covers business process automation, CRM setup, CRM integrations, AI workflows, API integrations, internal tools, dashboards, client portals, high-converting business websites, and full-stack web development. For many businesses, even a few broken workflows can create serious problems: → 10–30+ hours lost every month on manual admin work → Leads missed because follow-ups are not automated → Sales teams wasting time updating CRM records manually → Reports built by hand instead of generated automatically → Customers waiting longer because data is scattered across tools I help fix that by building clean systems where leads, customers, tasks, documents, payments, messages, forms, and reports move correctly without constant manual follow-up. Most businesses do not need more disconnected tools. They need systems that save time, reduce errors, improve response speed, and help the team focus on revenue-generating work. That is what I build. I design and develop automation systems using n8n, Make, Zapier, OpenAI, Claude, ChatGPT, APIs, webhooks, Google Apps Script, Airtable, Notion, Google Sheets, ClickUp, Asana, Trello, Slack, and custom Python or Node.js logic when no-code tools are not enough. I also work with CRM platforms including HubSpot, GoHighLevel, Pipedrive, Salesforce, Zoho CRM, Monday, Airtable, ClickUp, Keap, Freshsales, ActiveCampaign, Mailchimp, Klaviyo, Insightly, Copper, and custom CRM systems. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ What I can help you build: → CRM setup, cleanup, pipeline automation, and lead management systems → CRM integrations with websites, forms, ads, calendars, email, SMS, and payment tools → Automated lead capture, qualification, assignment, and follow-up workflows → AI agents and AI-powered workflows using OpenAI, Claude, and ChatGPT → n8n, Make, Zapier, and custom API automations → Webhooks, REST APIs, third-party integrations, and backend workflows → Airtable, Notion, Google Sheets, and database-based operations systems → Internal dashboards, admin panels, SaaS tools, and client portals → Business websites, landing pages, and high-end service pages → WordPress, Shopify, WooCommerce, MERN, Node.js, React, Python, Django, Flask, and FastAPI development → Reporting, invoicing, document generation, email workflows, and sales automation ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ The goal is not just to connect apps. The goal is to build systems that can help you: → Save 10–30+ hours per month by removing repetitive manual work → Reduce missed leads and delayed follow-ups → Improve CRM accuracy and pipeline visibility → Respond to prospects faster through automated workflows → Increase booked calls by making lead capture and follow-up more reliable → Reduce duplicate data, broken handoffs, and manual reporting → Give your team a cleaner system they can actually use Actual results depend on your current process, tools, and traffic volume, but the right automation system can often create a measurable difference in how fast your business operates. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Clients usually come to me when: → Their team is wasting hours every week on repetitive manual work → Their CRM is messy, slow, duplicated, or not being used properly → Leads are coming in but not being tracked, assigned, followed up, or reported correctly → Their website, forms, CRM, email, calendar, and payment tools are not connected → Their existing automation breaks when real users and real data enter the system → They need a developer who understands both business operations and technical execution I do not just connect apps together and call it automation. Before building, I look at the full workflow: → Where the data starts → Where it needs to go → What should happen automatically → What should stay manual → What can fail → How errors should be logged, retried, or handled → How the system will scale as the business grows This helps avoid fragile workflows, messy CRM pipelines, duplicate records, broken automations, and expensive rebuilds later. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Along with automation and CRM work, I can also support the development side of your business. That includes custom websites, landing pages, backend systems, admin dashboards, SaaS features, API integrations, payment flows, user portals, and internal tools. So if your business needs both automation and development, you do not need to hire separate people for every part of the system. My goal is simple: Build clean, reliable systems that save time, reduce manual work, improve operations, and are easy for your team to manage after delivery. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ For clients who read profiles: Send “RELIABLE” in your first message and I’ll offer a free 20-minute scoping call to map your workflow, ident

  • Automation
  • Make.com
  • Zapier
  • Airtable
  • Business Process Automation
  • ChatGPT
  • Notion
  • Scripting
  • API Integration
  • HighLevel
  • n8n
  • Task Automation
  • Google Sheets Automation
  • Selenium
  • Python
Rafique Adam C.

Accra, Ghana

$20/hr
5.0
20 jobs

I've built production systems serving 100,000+ users and currently lead engineering as CTO of a SaaS platform — so I bring senior-level architecture, not just code. Need a backend or full-stack engineer who ships fast without breaking what already works? I build production NestJS/Node.js APIs, Next.js web apps, and tricky third-party integrations (Stripe, GoHighLevel, Phorest, Zapier, PayFast) that other developers got stuck on. Hi 👋 I'm Rafique — a Top Rated AI-Native Full Stack Engineer with 100% Job Success on Upwork. I have 5+ years of experience building backend services, REST APIs, and SaaS platforms for startups and growing teams. Most of my work falls into one of three buckets: shipping new MVPs quickly, fixing and scaling existing apps, or building the integration layer that connects your product to the tools your business actually runs on. My core stack: 🔧 Backend: Node.js, NestJS, TypeScript, REST APIs, PostgreSQL, MongoDB, Prisma 🎨 Frontend: Next.js, React, TypeScript ☁️ Infra & Tools: AWS (Lambda, Cognito), Vercel, GitHub 🧠 AI-Native Workflow: Claude, Codex, and Cursor — used where they reduce bugs and ship faster, not as a replacement for clean architecture What clients hire me for: ✅ NestJS + Node.js backends with secure authentication and clean REST APIs ✅ Stripe, GoHighLevel, Phorest, PayFast, and Zapier integrations ✅ Next.js full-stack apps (auth, dashboards, SaaS MVPs) ✅ Performance, migrations, and stabilizing existing codebases ✅ Clear estimates, proactive updates, no surprises Recent client feedback: ⭐ "Rafique ROCKS — something I was trying to do on my own for hours and hours, he just did it." — Phorest → GoHighLevel integration ⭐ "Best developer to work with — extremely technical, patient, good communication, and most importantly knows his code. Definitely gonna hire again." — PayFast / Next.js integration ⭐ "He delivered high-quality authentication features, communicated clearly, and was very patient and professional." — NextJS + NestJS auth setup Send me a short message about what you're building or what's broken. I'll reply within 4 hours with a clear plan, realistic timeline, and an honest answer on whether I'm the right fit — no fluff, no sales pitch.

  • NestJS
  • Node.js
  • TypeScript
  • JavaScript
  • Database
  • AWS Application
  • API
  • API Integration
  • Scripting
  • API Development
  • REST API
  • PostgreSQL
  • MongoDB
  • Back-End Development
  • Full-Stack Development

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