Hire the Best OpenAPI

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Kunal B.

Ahmedabad, India

$20/hr
4.9
12 jobs

With 6+ years as a Full Stack Developer specializing in AI-accelerated development, I build high-quality, scalable web applications and MVPs lightning-fast using cutting-edge AI tools like Cursor, Claude Code, and Lovable.dev for rapid prototyping, then deliver polished production systems with modern stacks. Clients hire me to turn ideas into working products in days (not months): AI-assisted coding for clean, efficient frontends/backends, seamless Supabase + Vercel integrations for real-time, serverless apps, and full end-to-end delivery with performance and scalability in mind. 🔹 Core Expertise - AI-Powered Full Stack 🌐 Frontend: React Developer, Next.js Developer, Angular Developer 💻 Backend: Python Full Stack, Django Developer, Flask Developer, FastAPI Developer, Node.js, Nest.js, Express.js 🛠️ APIs & Modern Tools: GraphQL API, RESTful APIs, API Integration, Stripe/PayPal/Twilio, AI tool orchestration (Cursor, Claude, Lovable) 🗂️ Databases & Backend-as-a-Service: PostgreSQL Database, MySQL Database, MongoDB NoSQL, Supabase Integration (auth, realtime, storage), Redis ☁️ Deployment & Hosting: Vercel Deployment, Serverless Architecture, CI/CD Pipelines, Docker for rapid deploys 🤖 AI Acceleration: Generative AI integration, AI-assisted development, Prompt Engineering for code gen, LLM workflows in apps, rapid POC building 🏗️ Advanced: Microservices for AI, Serverless AI (Lambda + SageMaker), Event-Driven Architecture (Kafka for data streams), High-Availability & Fault-Tolerant Design 🔹 What Sets Me Apart in 2026 - 5-10x faster delivery via AI tools (Cursor/Claude for code, Lovable for instant prototypes) - Production-ready MVPs → scalable SaaS apps with Supabase + Vercel stack - Clean, maintainable code + performance optimization (load times, cost efficiency) - End-to-end: ideation → AI prototyping → full development → deployment & iteration - Proven with 20+ projects: startups love the speed-to-market and ROI 🔹 Ideal Projects - Build AI-enhanced web apps or SaaS MVPs quickly - Modern full-stack development with Supabase/Vercel + React/Next + FastAPI/Django - Feature additions, performance upgrades, or AI integrations into existing apps - Ongoing support for fast-moving products Clients return for my proactive communication, business-aligned solutions, and ability to ship reliable, intelligent applications fast. Let's turn your vision into a live product, message me to discuss your MVP or next feature!

  • OpenAPI
  • Python
  • Django
  • FastAPI
  • Machine Learning
  • Data Science
  • pandas
  • NumPy
  • PostgreSQL
  • Amazon Web Services
  • Docker
  • REST API
  • LangChain
  • ChatGPT
Ankit V.

Varanasi, India

$30/hr
4.8
102 jobs

I build production-ready SaaS applications on Bubble for founders and businesses who need to move fast without cutting corners. With over 5000+ hours delivered on Upwork, Bubble Certified status, and a 97% Job Success Score, I have helped clients across legal tech, wellness, logistics, e-commerce, and AI tooling go from concept to live product. What I build: AI-integrated SaaS platforms, two-sided marketplaces, client portals, internal tools, booking and scheduling systems, and MVP applications ready for investment or user acquisition. My technical stack goes beyond Bubble. I work with Supabase for scalable databases, FlutterFlow for mobile applications, OpenAI and RAG pipelines for AI features, Stripe for payments, and custom API integrations across the board. I have shipped real products used by real users across industries including construction law, wellness coaching, labour hire, golf services, pre-planning, and generative AI tooling. What you get working with me: clear scope definition from day one, proactive communication throughout the project, and a developer who treats your deadline as seriously as you do. I do not do cookie-cutter builds. Every project is scoped, architected, and delivered with the specific business goal in mind, whether that is launching an MVP to attract your first 100 users or scaling an existing platform to handle thousands. If you are building a SaaS product, marketplace, or AI-powered application and need a partner who has shipped products like yours before, send me a message describing what you are working on.

  • OpenAPI
  • Web Development
  • WordPress
  • CSS
  • HTML5
  • API Integration
  • Bubble.io
  • No-Code Development
  • Airtable
  • Web Design
  • Mobile App Design
  • Minimum Viable Feature
  • Prototyping
  • SaaS Development
Jitin M.

Lucknow, India

$14/hr
5.0
217 jobs

With 20+ years of experience in WordPress, WooCommerce, and eCommerce development, I help businesses build scalable, high-converting digital platforms powered by AI automation, API integrations, and modern web technologies. I specialize in developing custom WordPress and WooCommerce solutions that automate business workflows, improve customer experience, increase conversions, and support long-term growth. As a Top Rated freelancer with a 100% Job Success Score on Upwork, I focus on delivering reliable, scalable, and business-focused solutions with clear communication, strategic guidance, and long-term technical support. 🤖 AI Automation & API Integrations ✔️ OpenAI / ChatGPT API Integrations ✔️ Claude API & Gemini AI Integrations ✔️ AI Chatbots for Support & Lead Generation ✔️ AI Product Search & Smart Recommendations ✔️ AI Content & SEO Automation ✔️ AI Workflow Automation using Make, n8n & Zapier ✔️ CRM, ERP & Third-Party API Integrations ✔️ Custom AI-Powered Business Workflows ✔️ AI Agent & Automation Systems 🛒 WooCommerce & eCommerce Development ✔️ Custom WooCommerce Development ✔️ Advanced Cart & Checkout Customization ✔️ High-Converting eCommerce UX/UI ✔️ Subscription & Membership Websites ✔️ LMS & Online Course Platforms ✔️ Multi-Vendor Marketplace Development ✔️ Shopify to WooCommerce Migration ✔️ Payment Gateway & Shipping Integrations ✔️ Custom Product Logic & Dynamic Pricing ✔️ WooCommerce Performance Optimization ✔️ High-Traffic Store Scalability ⚙️ WordPress Development Expertise ✔️ Custom WordPress Development ✔️ Headless WordPress Solutions ✔️ API-Driven WordPress Applications ✔️ Enterprise WordPress Architecture ✔️ Advanced Plugin & Theme Customization ✔️ Custom Features & Functionality ✔️ WordPress Security & Malware Hardening ✔️ Website Speed Optimization & Core Web Vitals ✔️ Scalable Hosting & Server Optimization 🚀 Modern Tech Stack ✔️ Next.js ✔️ React ✔️ Node.js ✔️ Laravel ✔️ PHP ✔️ Bubble ✔️ Framer ✔️ Webflow ✔️ Shopify 🧩 WordPress Builders & Platforms ✔️ Elementor ✔️ Divi ✔️ Bricks Builder ✔️ Breakdance ✔️ Oxygen Builder ✔️ Gutenberg ✔️ Kadence ✔️ Thrive Architect ✔️ Avada ✔️ WPBakery / Visual Composer 💼 Why Clients Work With Me ✔️ 20+ years of hands-on development experience ✔️ Top Rated Upwork freelancer with 100% Job Success ✔️ Strong WooCommerce & WordPress architecture expertise ✔️ Deep understanding of AI automation workflows ✔️ Business-focused problem solving ✔️ Clean, scalable, maintainable code ✔️ Excellent communication & transparency ✔️ Reliable long-term support ✔️ Ability to handle complex custom functionality ✔️ Agency-quality execution with freelancer flexibility 🎯 Ideal Projects ✔️ AI-powered WooCommerce stores ✔️ Workflow automation systems ✔️ Custom WordPress platforms ✔️ API integrations & business automation ✔️ Membership & LMS websites ✔️ Headless WordPress applications ✔️ White-label agency partnerships ✔️ Conversion optimization & performance improvements 🤝 What You Can Expect ✔️ Strategic technical guidance ✔️ Performance-focused development ✔️ Scalable architecture ✔️ Thorough testing & QA ✔️ Clear communication throughout the project ✔️ Post-launch support & optimization ✔️ Cost-effective solutions for startups, agencies & growing businesses If you’re looking for a technical partner who understands both business growth and modern AI-powered web development, I’d be happy to discuss how we can build a reliable, scalable, and conversion-focused solution for your business.

  • OpenAPI
  • WordPress
  • WooCommerce
  • PHP
  • Payment Gateway Integration
  • WordPress Backup
  • WordPress Migration
  • WordPress Development
  • WordPress Customization
  • Elementor
  • Divi
  • Figma
  • Zapier
  • Ecommerce Website
  • Ecommerce Purchase Tracking
  • Ecommerce Backup & Migration
  • API Integration
  • Tracking Pixel
  • QuickBase
  • CRM Automation
Jap D.

Bhavnagar, India

$13/hr
4.8
38 jobs

🏆 Top-Rated on Upwork 🌟 100% Job Success Score ✅ 20+ Jobs completed 🏆 Hi, I am a Python Backend developer with 4 years of experience crafting robust and scalable web applications. I am passionate about turning ideas into reality, I specialize in building efficient and reliable backend systems using Django, Flask, and FastAPI. ✅ Why I am Unique? 🌟 Service Before Money 🌟 Full-Stack Proficiency 🌟 Uncompromising Communication 🌟 Weekend Support 🌟 Dedicated Freelancer 🌟 Attention to Detail 🌟 Problem Solver 🌟 Client-Centric Approach ✅ My Working Strategies I follow Agile methodologies and Waterfall models to ensure efficient project management and deliver high-quality results. I prioritize clear communication, code quality, and maintainability. My focus is on building scalable, secure, and well-documented applications. ✅ Technical Expertise 🔹 Python: Core programming language for backend development 🔹 Django, Flask, FastAPI: Python web frameworks for building robust applications 🔹 Databases: PostgreSQL, MySQL, SQLite 🔹 Cloud Platforms: AWS (EC2, S3, Lambda, RDS) 🔹 API Development: RESTful and GraphQL APIs using Open API specifications 🔹 Version Control: Git 🔹 Testing: Unit, integration, and API testing Ready to bring your project to life? Let's connect! Feel free to send me a message or check out my portfolio for more details. I am eager to discuss your project requirements and explore how I can help you achieve your goals. Thanks & Regards

  • OpenAPI
  • Python
  • Flask
  • Django
  • Web Development
  • Stripe
  • Amazon EC2
  • Amazon S3
  • AWS CodeDeploy
  • Back-End Development
  • Amazon Web Services
  • FastAPI
  • Web Scraping
  • API
  • Selenium
Wuyi A.

Abuja, Nigeria

$8/hr
5.0
10 jobs

Senior backend developer; Golang. I build reliable, well-structured APIs, integrate AI solutions using OpenAI, RAG, LangChain, and MCP, and automate workflows with n8n. Other skills include Angular, PHP (Laravel), and Node.js (NestJS). I deliver high-quality work on time, communicate clearly, and focus on solutions aligned with your goals. Let’s build something solid and efficient.

  • OpenAPI
  • Golang
  • RESTful API
  • API Documentation
  • PostgreSQL
  • Redis
  • Kubernetes
  • Docker
  • RabbitMQ
  • Microservice
  • MySQL
  • Angular
MAYURKUMAR P.

Ahmedabad, India

$13/hr
4.9
8 jobs

Helping businesses design and build scalable backend systems, AI-driven automation, and secure data platforms that perform reliably in real-world environments. With 11+ years of experience across backend engineering, AI systems, cloud infrastructure, and blockchain, the focus is on turning unclear ideas into production-ready solutions without unnecessary complexity. 💡 What businesses typically achieve working with me 🔹 40–70% reduction in reconciliation, audit, and verification effort 🔹 Near-zero data tampering risk through immutable on-chain proofs 🔹 30–50% faster approval, settlement, and validation workflows 🔹 Reduced fraud and dispute exposure through transparent system design 🔹 Lower long-term operational risk via hybrid on-chain and off-chain architectures 🔹 Reduced manual operations through AI automation 🔹 Faster decision-making with intelligent systems 🔹 Scalable backend architecture built for real usage 🔹 Improved system reliability, performance, and cost efficiency 🔹 Reduced manual operations through AI automation (Exact outcomes vary by use case and industry, but these ranges are realistic and consistently achievable with the right design.) 🚀 Core Capabilities 🔹 AI systems including LLMs, RAG pipelines, and multi-agent workflows 🔹 Backend development using Python, FastAPI, Node.js, and microservices 🔹 Real-time systems such as voice AI, chat platforms, and event-driven architectures 🔹 Cloud infrastructure across Azure, AWS, Docker, and Kubernetes 🔹 Blockchain systems including smart contracts, tokenization, and hybrid architectures 🔹 Trading and fintech systems including data pipelines and execution workflows 🧠 How Work Is Approached 🔹 Focus on business outcomes, not just implementation 🔹 Clean, scalable architecture designed for long-term growth 🔹 Strong ownership from design to production deployment 🔹 Clear communication and fast iteration cycles Most projects start with a problem, not a clear solution. That problem is translated into a structured system and executed with reliability. 🤝 Let’s Work Together Best suited for: 🔹 Startups building products from scratch 🔹 Teams scaling systems beyond MVP 🔹 Businesses integrating AI into real workflows 🔹 Platforms requiring secure and high-performance architecture Available for long-term collaborations and high-impact projects.

  • OpenAPI
  • Python
  • Node.js
  • Next.js
  • AI Chatbot
  • Generative AI
  • FastAPI
  • GPT-4
  • LangChain
  • Pinecone
  • Supabase
  • WhatsApp
  • Telegram
  • Twilio
  • n8n

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Rates charged by OpenAPI on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a OpenAPI on Upwork?

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