Hire the Best API Developers

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Rahul S.

Yamunanagar, India

$16/hr
5.0
79 jobs

I am Rahul a results-driven Airtable Automation Expert and Full-Stack Developer specializing in Airtable automation, Gravity Forms and JotForm integrations, Twilio SMS/Voice automation, and custom API development using PHP and Laravel. If you need to connect WordPress or WooCommerce to Airtable, automate business workflows, or integrate third-party APIs like Twilio, Stripe, Printful, or PayPal, I can build you a reliable, scalable solution tailored to your exact workflow. ✅ Core Skills & Expertise 📊 Airtable Development & Automation Airtable base design with linked records, formulas, and interfaces Advanced Airtable automations using scripts, webhooks, and the Airtable API Custom Airtable integrations with CRMs, forms, and eCommerce systems No-code/low-code workflow optimization with Make (Integromat) and Zapier 📝 Form Integrations & Workflow Automation Gravity Forms, WS Form, JotForm, Zoho Forms, Formstack, Fluent Forms & Formidable Forms Form-to-Airtable data pipelines, auto-responders, conditional logic, and lead routing Real-time webhook triggers and Airtable synchronization for lead management 🌐 WordPress & WooCommerce Development Custom WordPress theme and plugin development WooCommerce automation for product management and checkout processes API integrations with Printful, Printify, and other third-party services 💻 PHP & Laravel Development RESTful API design and backend systems using Laravel and PHP Secure Stripe and PayPal payment gateway integrations Custom API development and webhook-based workflow automation 📞 Twilio API & Messaging Automation Twilio SMS, Voice, and IVR flow setup via Twilio Studio Automated lead follow-ups, appointment reminders, and alert systems Twilio API integrations with CRMs, WordPress, and Airtable Tech & Tools: Airtable, Laravel, PHP, WordPress, WooCommerce Gravity Forms, WS Form, JotForm, Zoho Forms, Formstack, Fluent Forms, Formidable Forms Twilio API, Stripe, PayPal, Printful API, Printify ✅ Why Work With Me? 🔁 End-to-end automation expert — no more manual tasks 📈 Business-first approach — focused on ROI and user experience 🧩 Seamless API integrations — make all your tools talk to each other 💬 Clear communication & prompt delivery Ready to bring your project to life with smarter workflows and scalable code? 📬 Let’s talk today — and turn your tech into a competitive advantage. Keyword: Twilio API, Twilio Integration SMS Messaging, Voice Calls, Twilio Functions, Twilio Studio, Twilio Call Center Solutions, center solutions using Twilio, Interactive Voice Response (IVR), Twilio Flex, Twilio Development, API Integration, VoIP Solutions,

  • API Development
  • Airtable
  • Automation
  • CRM Software
  • CRM Automation
  • API Integration
  • Jotform
  • Gravity Forms
  • Google APIs
  • Twilio API
  • PayPal
  • Stripe API
  • RESTful API
  • WordPress Plugin
  • WordPress
  • System Automation
  • Email Automation
  • Android App Development
  • iOS Development
  • Mobile App Development
Vitalii K.

Kharkiv, Ukraine

$42/hr
4.8
76 jobs

I build data- and API-heavy platforms on Laravel + React — and own them end-to-end. My focus is the parts most developers bolt on as an afterthought: interactive maps (Mapbox / Leaflet / Google Maps) and Meta / Google marketing-API integrations. 15 years, 50+ projects delivered, 100% Job Success. I work best on systems built to last and grow — but I'm just as happy taking a single, well-scoped task to start. ⚙️ FULL-STACK WEB PRODUCTS Laravel APIs paired with React frontends, built to last — not just to ship. From SaaS platforms and admin dashboards to a multi-brand CMS engine powering 15+ automotive dealer websites (Volvo, Mercedes-Benz, Alfa Romeo, Jaguar, Land Rover). 🗺 Interactive Maps — Mapbox / Leaflet / Google Maps API ◾ Custom maps: styled tiles, markers, plotting live data ◾ Map tools: drawing & editing shapes, measurements and calculations on the map ◾ Example: a solar-PV design tool with live roof mapping 🛠️ Meta Graph / Marketing API ◾ Lead capture: real-time leads delivered straight to CRM, email, or messenger ◾ Ad tooling: custom reporting logic, automated insights, campaign automation ◾ Publishing & analytics: posting to Instagram/Facebook (feed, stories), post & profile insights 🗃️ Google API ◾ Custom Looker Studio connectors ◾ Google Merchant Center feeds (recent project: 30k+ SKUs synced) ◾ Google Ads automation tools 💳 Payments ◾ Standard and custom Stripe / PayPal / Afterpay integrations However you want to start — a full build, a senior pair of hands on an existing codebase, or one focused task (a map feature, a Meta/Google API integration, a tracking or feed setup) — I'm easy to work with and quick to get going. Send a short note about your project, even a rough idea, and I'll tell you honestly how I'd approach it. 🤝 Thank you, Vitalii Komliev

  • API Development
  • Laravel
  • React
  • PHP
  • JavaScript
  • API Integration
  • Web Development
  • Mapbox
  • Leaflet
  • Google Maps API
  • Facebook Graph API
  • Node.js
  • Next.js
  • GIS
  • Marketing API Integration
  • Instagram API
  • Facebook Advertising
  • AI Development
  • AI Agent Development
  • Marketing Automation
Abdul Jamal N.

Islamabad, Pakistan

$25/hr
5.0
45 jobs

🎁 𝗔 𝟭𝟬𝟬% 𝗿𝗲𝗳𝘂𝗻𝗱 𝗶𝗳 𝗜 𝘀𝗲𝘁 𝘁𝗵𝗲 𝘄𝗿𝗼𝗻𝗴 𝗲𝘅𝗽𝗲𝗰𝘁𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗰𝗮𝗻’𝘁 𝗱𝗲𝗹𝗶𝘃𝗲𝗿. 𝗡𝗼 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀 𝗮𝘀𝗸𝗲𝗱! I architect the AI systems other developers can't ship production RAG pipelines, multi-agent LLM apps and chatbots on a full-stack React, Next.js and Node.js base. 𝗣𝗿𝗲𝘃𝗶𝗼𝘂𝘀𝗹𝘆 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 (𝘁𝗼𝗽 𝟭% 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸) 🏅 AI architecture, not AI demos production multi-tenant platforms that scale 🚀 About I architect production AI agent systems multi-tenant LLM orchestration, agentic RAG, voice AI, and MCP servers for SaaS founders and agencies who need real systems, not chatbot demos. 15+ years of full-stack engineering means your AI doesn't just work in a Loom video; it scales, bills, and survives real traffic. 🌟 What I Deliver ✅ AI Agent Platforms Multi-tenant orchestration with multi-LLM execution (OpenAI, Anthropic, Gemini), agentic RAG, MCP servers, embeddable widgets, LangSmith tracing, cost/KPI analytics ✅ Voice AI & Conversational Agents Production voice with VAPI, ElevenLabs, Twilio inbound/outbound calling, transcription, workflow triggers, per-call cost attribution ✅ AI Workflow Automation n8n-powered agentic workflows connecting LLMs, CRMs, payments, and 70+ APIs into autonomous business processes ✅ Multi-Tenant SaaS Infrastructure Laravel/Node backends with per-tenant isolation, subscription billing, role-based access, React frontends scaling 100 to 100K users ✅ Enterprise AI Integrations Stripe, Salesforce, HubSpot, Go High Levek (GHL) ,Shopify, OpenAI, Anthropic, Gemini, ElevenLabs, VAPI, Twilio webhook routing, async queues, full observability 🏗️ What I Build AI Agent Orchestration Platforms Production multi-tenant systems that deploy, manage, monitor AI agents at scale: multi-LLM, agentic RAG (Pinecone/MongoDB), streaming chat, cost tracking, KPI dashboards, embeddable widgets. Voice AI & Conversational Automation Voice agents with ElevenLabs, VAPI, Twilio inbound/outbound calls, real-time transcription, post-call analysis, workflow triggers, per-call cost attribution. n8n Workflow Automation Builders No-code automation backed by n8n with drag-and-drop editors, multi-step agentic workflows, webhooks, 20+ tool integrations (Slack, Sheets, Asana, ClickUp, HubSpot). MCP Servers & Agent Tool Integration Custom Model Context Protocol servers giving AI agents tool-use, structured outputs, and secure access to internal data. Multi-Tenant SaaS Backends Laravel backends with per-tenant isolation, subscription billing, role-based permissions, REST APIs built to scale from first customer to thousands. React Frontends at Scale TypeScript React 18 with BLoC, real-time streaming (Socket-io + Pusher), embeddable widgets, browser extensions, visual workflow builders CI/CD deployed. API Integration Systems 70+ integrations across Stripe, Salesforce, HubSpot, Shopify, FedEx, VAPI, Twilio, OpenAI, Anthropic, Gemini webhook routing, async queues (Laravel Horizon), error tracking. 🍇 Signature Work 🔷 Studio98-ai AI Workforce Platform (flagship): Multi-tenant AI agent orchestration serving 50+ clients across sales, marketing, ops, support. LangChain orchestration with OpenAI/Anthropic/Gemini, agentic RAG via MongoDB/PostgreSQL, MCP server, n8n workflows, LangSmith tracing. React 18 frontend with 27 modules, embeddable chat widget, browser extension, visual workflow builder, real-time SSE streaming. 🔷 Rave 2.0 Multi-tenant SaaS retail platform with subscription management, analytics, drag-and-drop page builder. 🔷 Enterprise Jira Governance Multi-team Agile system for 50+ developers with workflow automation and executive dashboards. 🛠️ Core Tech Stack AI & Agents: LangChain · LangGraph · LangSmith · MCP · Agentic RAG (Pinecone, MongoDB) · OpenAI · Anthropic Claude · Gemini · Prompt Engineering Voice AI: VAPI · ElevenLabs · Twilio · Real-time Transcription Automation: n8n · Make · Webhooks Backend: Laravel 11 · PHP 8.1+ · Node.js · TypeScript · Nova · Sanctum · Octane · Horizon · Redis · MongoDB · PostgreSQL Frontend: React 18 · TypeScript · Vue.js · Inertia.js · Socket-io · Pusher Infra: Docker · AWS · GCP · Firebase · CI/CD Delivery: Scrum (PSM I) · Jira · Confluence · ACP-620 💡 Why Clients Choose Me ✅ AI architecture, not AI demos production multi-tenant platforms that scale ✅ End-to-end ownership agent architecture to deployment to team handoff ✅ 15+ years, 50+ AI agents in production, 24,000+ Upwork hours ✅ Multi-LLM, multi-tenant, multi-channel platform scale, not script scale ✅ Top Rated Plus with 100% JSS sustained, not seasonal Last updated: 21.06.2026

  • API Development
  • API
  • Laravel
  • React
  • PHP
  • TypeScript
  • RESTful API
  • Zapier
  • Vue.js
  • AI Development
  • Stripe API
  • PayPal Integration
  • Vercel
  • API Integration
  • Node.js
  • JavaScript
  • AWS Development
  • Replit
  • Next.js
Patrick M.

Whitney, Texas

$111/hr
4.9
157 jobs

☑️ 𝟮𝟮+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗰𝘂𝘀𝘁𝗼𝗺 𝗪𝗼𝗿𝗱𝗣𝗿𝗲𝘀𝘀 𝗽𝗹𝘂𝗴𝗶𝗻 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀. ✅ 𝗧𝗼𝗽 𝟬.𝟭% 𝗨𝗽𝘄𝗼𝗿𝗸𝗲𝗿. 𝗘𝘅𝗽𝗲𝗿𝘁 𝗩𝗲𝘁𝘁𝗲𝗱. 𝗖𝗵𝗼𝗼𝘀𝗲 𝗺𝗲 𝘄𝗵𝗲𝗻 𝘆𝗼𝘂 𝘄𝗮𝗻𝘁 𝗶𝘁 𝗱𝗼𝗻𝗲 𝗿𝗶𝗴𝗵𝘁 𝘁𝗵𝗲 𝗳𝗶𝗿𝘀𝘁 𝘁𝗶𝗺𝗲 𝗼𝗿 𝗻𝗲𝗲𝗱 𝗶𝘁 𝗳𝗶𝘅𝗲𝗱 𝗽𝗿𝗼𝗽𝗲𝗿𝗹𝘆! 𝗛𝗶𝗴𝗵𝗹𝘆 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗲𝗱 𝗪𝗼𝗿𝗱𝗣𝗿𝗲𝘀𝘀 𝗽𝗹𝘂𝗴𝗶𝗻 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 𝗯𝘂𝗶𝗹𝘁 𝘄𝗶𝘁𝗵 𝗰𝗹𝗲𝗮𝗻 𝗰𝗼𝗱𝗲 𝘁𝗵𝗮𝘁 𝗺𝗼𝘀𝘁 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁𝗹𝘆 𝘀𝗼𝗹𝘃𝗲𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗯𝗹𝗲𝗺. 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 or 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲. I’ll be happy to schedule a call to chat about your needs, outline a solution and give you a timeline and price to make it happen. ❝ 𝗜 𝗵𝗮𝗱 𝗮 𝗱𝗶𝗳𝗳𝗶𝗰𝘂𝗹𝘁 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗵𝗮𝘁 𝗻𝗼 𝗼𝗻𝗲 𝗰𝗼𝘂𝗹𝗱 𝗳𝗶𝗴𝘂𝗿𝗲 𝗼𝘂𝘁—𝘂𝗻𝘁𝗶𝗹 𝗵𝗲 𝗱𝗶𝗱. 𝗡𝗼𝘁 𝗼𝗻𝗹𝘆 𝘁𝗵𝗮𝘁, 𝗯𝘂𝘁 𝗵𝗲 𝗮𝗹𝘀𝗼 𝗰𝗹𝗲𝗮𝗿𝗹𝘆 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗲𝗱 𝗲𝘃𝗲𝗿𝘆 𝘀𝘁𝗲𝗽 𝗼𝗳 𝘁𝗵𝗲 𝘄𝗮𝘆. 𝗜 𝗵𝗮𝗱 𝗮 𝗽𝗵𝗼𝗻𝗲 𝗰𝗼𝗻𝘃𝗲𝗿𝘀𝗮𝘁𝗶𝗼𝗻 𝘄𝗶𝘁𝗵 𝗵𝗶𝗺 𝗮𝗻𝗱 𝗮𝗻𝗼𝘁𝗵𝗲𝗿 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, 𝗮𝗻𝗱 𝘁𝗵𝗲 𝗼𝘁𝗵𝗲𝗿 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘀𝗮𝗶𝗱, "𝙏𝙝𝙞𝙨 𝙜𝙪𝙮 𝙧𝙚𝙖𝙡𝙡𝙮 𝙠𝙣𝙤𝙬𝙨 𝙬𝙝𝙖𝙩 𝙝𝙚'𝙨 𝙙𝙤𝙞𝙣𝙜" 𝗜 𝗵𝗶𝗴𝗵𝗹𝘆 𝗿𝗲𝗰𝗼𝗺𝗺𝗲𝗻𝗱 𝗵𝗶𝗺, 𝗮𝗻𝗱 𝗵𝗲'𝘀 𝗻𝗼𝘄 𝗺𝘆 𝗴𝗼-𝘁𝗼 𝗳𝗼𝗿 𝗮𝗻𝘆 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝘄𝗼𝗿𝗸. ❞ 🗣 𝗣𝗮𝘂𝗹 𝗠𝗮𝗿𝗸𝗼𝗳𝗳 - 𝗢𝘄𝗻𝗲𝗿, 𝗗𝗿. 𝗣𝗲𝗽𝗽𝗲𝗿 𝗦𝘁𝗮𝗿 𝗖𝗲𝗻𝘁𝗲𝗿𝘀 Highlights my clients appreciate about working together: ☑️ 𝗛𝗼𝗻𝗲𝘀𝘁𝘆 - I only quote exactly what’s needed and I track every hour using Upwork’s screen capture time tracker on every project ☑️ 𝗥𝗲𝗹𝗶𝗮𝗯𝗹𝗲 – I work 7 days a week, responding to messages within 30 minutes to 1 hour during work hours ☑️ 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗲𝗱 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 - API Integration & Automation Obsession – Real Estate - Payment Processing - SaaS ☑️ 𝗖𝗹𝗲𝗮𝗿 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 & 𝗗𝗼𝗰𝘂𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻 – You’ll always know what’s happening with your project. You’ll have Loom videos explaining how everything works. ☑️ 𝗨𝗦 𝗠𝗮𝗿𝗸𝗲𝘁 𝗖𝗹𝗶𝗲𝗻𝘁 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻 - All my experience and solutions are based on American standards, best practices and expectations Hi, I’m Rick aka Patrick! For more than 22 years my expertise has focused on making third-party applications work flawlessly with WordPress through the use of custom built plugins and API integrations. I’m the creator of the “WordPress Plugin Dragon Framework” and follow Robert C. Martin’s Clean Code principles (SOLID, DRY, YAGNI) to ensure exceptional quality. 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀 𝗢𝗳 𝗠𝘆 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 ✔ Custom WordPress API Integrations - API Development & API Automation - ✔ Real Estate IDX Plugin & MLS API Solutions - Housecall Pro ✔ Custom WordPress Plugin Development & WordPress Web Development ✔ Business Automation Solutions - Zapier - Zapier Workflows - Google Sheets ✔ WooCommerce API - E-commerce Solutions - SaaS Solutions - Data Synchronization - Stripe - PayPal 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀 𝗢𝗳 𝗠𝘆 𝗢𝘁𝗵𝗲𝗿 𝗖𝗼𝗺𝗺𝗼𝗻𝗹𝘆 𝗨𝘀𝗲𝗱 𝗦𝗸𝗶𝗹𝗹𝘀 ✔ Senior Developer - Laravel - PHP - React - XML - JSON ✔ API Expert - RESTful API - Google API - MLS API - RESTful API - RESTful Architecture - SOAP API - Google API - Laravel API - RESO API ✔ Business Automation Solutions - Zapier - Google Sheets Thanks for learning about me! If you’re looking to get your WordPress plugin integration project done right the first time, 𝗶𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 or 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲. I’ll invite you to book a complimentary consultation call together. Talk soon! Rick aka Patrick Mac Gillis ❝ 𝘾𝙤𝙪𝙡𝙙𝙣'𝙩 𝙝𝙖𝙫𝙚 𝙗𝙚𝙚𝙣 𝙝𝙖𝙥𝙥𝙞𝙚𝙧 𝙬𝙞𝙩𝙝 𝙍𝙞𝙘𝙠'𝙨 𝙬𝙤𝙧𝙠, 𝙘𝙤𝙢𝙢𝙪𝙣𝙞𝙘𝙖𝙩𝙞𝙤𝙣, 𝙖𝙩𝙩𝙚𝙣𝙩𝙞𝙤𝙣 𝙩𝙤 𝙙𝙚𝙩𝙖𝙞𝙡𝙨, 𝙧𝙚𝙨𝙥𝙤𝙣𝙨𝙞𝙫𝙚𝙣𝙚𝙨𝙨, 𝙖𝙣𝙙 𝙚𝙫𝙚𝙧𝙮 𝙤𝙩𝙝𝙚𝙧 𝙖𝙨𝙥𝙚𝙘𝙩 𝙮𝙤𝙪'𝙙 𝙚𝙭𝙥𝙚𝙘𝙩 𝙛𝙧𝙤𝙢 𝙖 𝙥𝙧𝙤𝙛𝙚𝙨𝙨𝙞𝙤𝙣𝙖𝙡 𝙙𝙚𝙫𝙚𝙡𝙤𝙥𝙚𝙧. 𝙄𝙛 𝙄 𝙣𝙚𝙚𝙙 𝙖𝙙𝙙𝙞𝙩𝙞𝙤𝙣𝙖𝙡 𝙬𝙤𝙧𝙠 𝙤𝙧 𝙝𝙖𝙫𝙚 𝙖 𝙣𝙚𝙬 𝙥𝙧𝙤𝙟𝙚𝙘𝙩, 𝙍𝙞𝙘𝙠 𝙞𝙨 𝙩𝙝𝙚 𝙤𝙣𝙡𝙮 𝙤𝙣𝙚 𝙄'𝙡𝙡 𝙧𝙚𝙖𝙘𝙝 𝙤𝙪𝙩 𝙩𝙤! ❞ 🗣 𝙍𝙤𝙗 𝙂𝙧𝙖𝙗𝙤𝙬𝙨𝙠𝙞 - 𝙊𝙬𝙣𝙚𝙧 - 𝙂𝙪𝙣𝙂𝙧𝙤𝙪𝙥𝙞𝙚

  • API Development
  • API
  • API Integration
  • Automation
  • Real Estate IDX
  • WordPress
  • WooCommerce
  • MLS Consulting
  • WordPress Plugin
  • Web Development
  • RESTful API
  • PHP
  • Zapier
  • JSON API
  • GPT API
Omer F.

Dubai, United Arab Emirates

$55/hr
4.9
100 jobs

Software Architect & Technical Writer. 16 years of engineering experience. 86 completed projects across 35+ organizations — Branch, Bright Data, NexHealth, Fonoa, and more. I build API and Product documentation systems that keep pace with fast-moving products. CORE SERVICES: → API & Developer Documentation — Turn complex REST, GraphQL, and OpenAPI specs into clean, navigable references developers trust and return to → Documentation Architecture — Design docs-as-code pipelines, CI/CD workflows, and multi-environment setups that keep your docs in sync with your codebase automatically → SaaS & Platform Docs — Build onboarding flows, help centers, release notes, and internal runbooks that reduce time-to-value for every new user → API Integrations & Technical Guides — Build and document the integration layer so your developers have both working code and clear guidance → AI Agents & Automation Systems — Design and deploy Claude/OpenAI-powered agents, LLM workflows, and automation pipelines (Make, Zapier, GitHub Actions) that handle real business processes end-to-end Documentation Platforms: ReadMe · Mintlify · Docusaurus · Stoplight · GitBook · Swagger/OpenAPI 3.0 · Redoc · Postman · Confluence Technical Stack: Claude API · OpenAI · LangChain · Make · Supabase · Node.js · REST · GraphQL · GitHub Actions · JavaScript · Python · AWS Industries: AI/ML · Fintech · Healthcare · SaaS · Developer Tools · Maritime · E-Commerce Lets connect and I can map out exactly what needs to be built.

  • Technical Writing
  • API Documentation
  • Instruction Manual
  • Technical Documentation
  • User Manual
  • Technical Report
  • Swagger
  • Report Writing
  • Apiary
  • Content Writing
  • Content Creation
  • OpenAPI
  • Article Writing
  • Software Documentation
Wagnew M.

Debre Tabor, Ethiopia

$5/hr
5.0
5 jobs

I’m a Back-End Developer specializing in Django, Django REST Framework, PostgreSQL, and MySQL, with strong experience building secure, scalable, and well-structured APIs for real-world applications. I focus on writing clean, maintainable code, designing efficient database systems, and delivering reliable backend logic that supports smooth, high-performance user experiences. Alongside backend development, I bring solid skills in Machine Learning and Data Analytics, using tools like Pandas, NumPy, scikit-learn, TensorFlow, and Power BI to build predictive models, automate workflows, and create data-driven dashboards. This allows me to support clients who need both robust backend systems and intelligent, analytics-powered features. I have successfully completed projects with 100% Job Success, demonstrating strong communication, consistent delivery, and high-quality results. I always ensure clear documentation, proper API testing, and smooth integrations for frontend developers. #. What I Can Do for You Build and document REST APIs (JWT Authentication, CRUD, filtering, pagination) Design and optimize relational databases (PostgreSQL, MySQL) Deploy backend systems using Docker, Linux, GitHub, and cloud services Integrate Celery + Redis for background jobs and async tasks Develop ML models for prediction, classification, and automation Create interactive dashboards and data visualizations Troubleshoot, refactor, and scale existing backend systems

  • Python
  • React
  • JavaScript
  • Microsoft Excel
  • TensorFlow
  • Docker Compose
  • Kubernetes
  • TypeScript
  • Django
  • MySQL
  • PostgreSQL
  • RESTful API
  • Unit Testing
  • Firebase
  • Microsoft Power BI

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API developer hiring guide

API developers design and build the connections that power modern software ecosystems. From enabling real-time data exchange between platforms to creating secure endpoints for mobile apps, these professionals help businesses automate workflows, improve system integration, and unlock new product capabilities.

What does an API developer do?

An API developer builds and maintains application programming interfaces (APIs) that allow software systems to connect, share data, and perform tasks. These professionals focus on designing secure, well-documented, and scalable APIs that enable seamless integration between platforms, mobile apps, and web services.

Companies hire API developers to streamline operations, connect external providers, automate internal workflows, and enable third-party access to their software products.

How to hire an API developer on Upwork

Hiring the right API developer starts with a clear job post and continues through evaluating skills, communication, and compatibility.

Step 1: Craft a targeted job post

A well-crafted job post attracts qualified API developers who match your project requirements.

  • Share your objectives. Start with a clear job description that outlines your technical needs and goals.

  • Define your tech stack. Mention if your system uses RESTful APIs, GraphQL, AWS, or specific frameworks like Flask or Express.

  • List use cases and deliverables. Explain what the API should do and include whether you need documentation, testing, or integration support.

To streamline this step, use the Job Post Generator, powered by Uma™, Upwork’s Mindful AI, to quickly draft a customized job post for your review.

Step 2: Filter and evaluate candidates

Systematically assess candidates based on technical expertise, project history, and tool proficiency.

  • Search the talent pool using Upwork's filters for skills, hourly rate, and work history.

  • Review portfolios. Look for experience building secure APIs with scalable architecture.

  • Check API design experience. Strong developers demonstrate knowledge in API management, life cycle, and versioning.

  • Look for relevant tools. Confirm familiarity with Postman, Swagger/OpenAPI, AWS, and authentication systems like OAuth.

You can use Upwork’s instant video interviews to screen applicants for a best-fit shortlist, with Uma providing side-by-side candidate comparisons.

Step 3: Interview your top choices

Direct conversations reveal how candidates approach technical challenges. Consider these common back-end developer interview questions to structure your discussions.

  • Discuss their process. Ask how they design, test, and deploy APIs and handle edge cases.

  • Explore documentation standards. Clear API documentation improves developer experience and long-term usability.

  • Ask about scalability. Confirm the developer understands how to optimize APIs for performance.

Upwork Messages allows you to schedule and conduct live video interviews on the platform, with call transcripts and summaries available after the calls.

Step 4: Agree on scope and begin work

Before starting the work, you’ll want a firm contract in place Establishing well-defined project parameters before work begins creates a foundation for successful collaboration.

  • Define project structure. Choose between a fixed-price or hourly contract based on your project scope.

  • Outline deliverables and timelines. Break work into sprints or milestones where possible.

  • Discuss access and security. Ensure safe sharing of API keys, credentials, and runtime environments.

  • Plan for maintenance. Set terms for ongoing support if needed.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring an API developer cost?

Most API developers on Upwork charge $20-$40 per hour, depending on experience, tech stack, and project complexity.

You can use these typical cost ranges to help estimate a budget for your API developer project needs:

Simple integration or endpoint setup

$200-$500 /project

Entry-level to mid-level
  • Single REST endpoint creation
  • Basic authentication setup
  • Simple third-party API integration

Standard API development

$500-$2,000 /project

Mid-level to senior-level
  • Multiendpoint API with authentication
  • Documentation using Swagger/OpenAPI
  • Integration with internal tools

Complex or custom API architecture

$2,000-$6,000+ /project

Senior-level or specialist
  • Full API system design
  • Public API with versioning
  • Microservices architecture
  • Advanced security implementation

Ongoing API maintenance

$800-$3,000 /month

Mid-level to senior-level
  • Performance monitoring
  • Bug fixes and endpoint updates
  • Documentation maintenance

Strategic API consulting

$3,000-$10,000+ /project

Expert or principal-level
  • API strategy and roadmap
  • Architecture review
  • Developer portal setup

FAQs about API developers

Frequently asked questions

Is hiring an API developer worth it?

Hiring an API developer is a smart investment for projects involving system integrations, third-party access, or workflow automation. A skilled developer can reduce development time and improve product flexibility.

What skills should I look for in an API developer?

When hiring an API developer, look for experience with RESTful API design, versioning, error handling, and authentication protocols like OAuth. Common languages include Python, JavaScript (Node.js), or Java. Familiarity with API testing and documentation tools like Swagger or Postman is also valuable.

What's the difference between an API developer and a back-end developer?

The API developer role is a subset of back-end developers, focusing specifically on creating APIs for system communication. A dedicated API developer is typically more skilled in designing secure, scalable, and well-documented interfaces.

Do I need a full development team, or can one API developer handle the project?

Many API projects can be handled by one experienced professional. However, if the API is part of a larger system overhaul or involves deep coordination with front-end or mobile teams, a broader development team may offer better outcomes.

Are API developers responsible for API documentation?

Yes, in most cases, skilled API developers provide technical documentation covering endpoints, parameters, and authentication methods. For customer-facing APIs, you may also want a technical writer to polish the format.

Which programming languages are commonly used in API development?

Python, JavaScript (Node.js), and Java are the most common languages for API development. Developers may also use frameworks like FastAPI, Express, or Spring Boot. Familiarity with cloud service SDKs like AWS is important for deployment.

How do API developers support AI agents and modern web applications?

API developers build stable, scalable interfaces that allow AI agents and web applications to access data, trigger actions, and interact with external systems in real time.

What’s the role of an API developer in managing public APIs?

An API developer builds and maintains connections that power software ecosystems, especially when using or publishing public APIs. They ensure your API's functionality is reliable, well-documented, and secure.