Hire the Best REST API Developers
in the United States

If your app is broken, behind schedule, or stuck with bugs you can't diagnose, I can help. I specialize in taking AI-built and half-finished apps the last mile: fixing, hardening, auditing, and shipping them to production. I've been building production software for 35+ years, including a decade as CTO and then Chief Product Officer at a fintech platform, where transaction correctness, data isolation, and security were non-negotiable. I still sit in that seat today as a fractional CTO for founders, guiding teams from idea through MVP launch. I've led architecture, run engineering teams, and shipped systems that had to hold up under real operational stakes. I build with AI tooling every day, including Claude and the Anthropic API, and I run my own business operations on an automated AI-agent pipeline I built. That's why my delivery timelines run ahead of standard estimates, and why I know exactly where AI-generated codebases skip guardrails and where they hold up. My recent production work centers on React, Next.js, TypeScript, Supabase (Postgres, Auth, RLS), Node.js, and Stripe. Recent engagements include pre-launch SaaS architecture audits, Supabase RLS and API security reviews, rescuing AI-generated MVPs (Lovable, v0, and similar) into production, and LLM feature integrations. Common engagements: - Pre-launch architecture and security audits, with a written findings and remediation report (Supabase RLS is a specialty) - Stabilizing and finishing AI-built or half-built MVPs - API integrations that fail, timeout, or return incorrect data - Auth, webhooks, and data sync issues - React rendering, state, and performance problems - Node.js / Express backend errors and crashes - LLM features: chat, scoring, extraction, and agent workflows I also work with Web3 systems when a project calls for it, including Ethereum and Solana smart contracts, token integrations, and wallet-based workflows. I'm available for short-term fixes, audits, and ongoing support. If you're not sure what you need yet, start with an audit: you'll get a written findings and remediation report you can act on with or without me.

If your data is stuck in the wrong system, in messy files, or behind an awkward API, I can help. I turn complex data problems into working systems and usable deliverables. I help clients move data between platforms, automate manual work, clean up unreliable exports, and build workflows that save time and reduce errors. Whether the deliverable is a program they can keep using, or a clean CSV, Excel file, report, or database, I can make it happen. Most of my work is API integrations, ETL pipelines, backend automation, data processing, and data migrations. I'm at my best when the problem is not clean or perfectly defined. I'll solve that problem first. I build data workflows that are meant to hold up in real use. I work with complex APIs, big JSON or XML data files, elaborate schema, folders full of CSV and Excel files, and large datasets where correctness matters. The result is a cleaner dataset, a dependable program, or a responsive and well-designed workflow. If you need a dependable program, a solid new system, or a clean final dataset, I can help.

🚀 Results-Driven Web Developer with strong expertise in Python, Django, Flask, full-stack web development, backend engineering, API integration, and embedded systems. I help startups, businesses, and entrepreneurs turn ideas into scalable, secure, and high-performance applications. With a deep understanding of modern web technologies, clean architecture, and performance optimization, I deliver production-ready solutions that are easy to maintain and scale. 🔹 Core Skills & Technologies Backend Development Python Programming Django (REST Framework, ORM, Authentication, Middleware) Flask (Microservices, REST APIs) FastAPI RESTful API Development GraphQL Microservices Architecture Asynchronous Programming Frontend & Design Integration HTML5, CSS3, JavaScript (ES6+) Responsive Web Design Bootstrap, Tailwind CSS React.js (basic integration) UI/UX Design Implementation Figma / Adobe XD to Code Cross-Browser Compatibility Databases & Storage PostgreSQL MySQL SQLite MongoDB Redis Database Design & Optimization API & Third-Party Integrations Payment Gateways (Stripe, PayPal) OAuth & Social Login Google APIs SMS / Email APIs Webhooks External REST API Integration DevOps & Deployment Docker & Containerization CI/CD Pipelines AWS, DigitalOcean, Heroku Linux Server Administration Nginx, Gunicorn Cloud Deployment & Scaling Embedded Systems & IoT Embedded Python Microcontrollers (Arduino, ESP32, Raspberry Pi) IoT Web Dashboards Hardware-Software Integration Sensor Data Processing Serial Communication 🔹 What I Can Build for You ✅ Custom Web Applications ✅ Python Django & Flask Websites ✅ REST APIs & Backend Systems ✅ SaaS Platforms ✅ Admin Dashboards ✅ Embedded-Web Integrated Systems ✅ Automation & Scripts ✅ API Development & Integration ✅ Bug Fixing & Performance Optimization ✅ Database Design & Migration 🔹 Why Clients Choose Me ✔ Clean, scalable & secure code ✔ SEO-friendly and performance-optimized apps ✔ Clear communication & fast response ✔ On-time delivery with regular updates ✔ Long-term support & maintenance ✔ Business-focused solutions I follow best coding practices, write well-documented code, and always prioritize security, speed, and scalability. NB: My work covers all these and is not limited to: Python Developer | Django Developer | Flask Developer | Web Developer | Full Stack Developer | Backend Developer | REST API Developer | API Integration | SaaS Developer | Embedded Systems Developer | IoT Developer | Microservices | Database Design | PostgreSQL | MySQL | MongoDB | Cloud Deployment | AWS Developer | Docker | Linux | Automation | Web Application Development | Software Engineer | Custom Web Development | Python Automation | Embedded Python | Hardware Integration

✨ Senior API Integration & AI Automation Specialist | LLM & OpenAI Expert ✨ Core Expertise: API Integrations • AI Agents • LLM Applications • OpenAI API • Payment Gateways • ERP Systems • Chatbots • Microservices • Marketing Tools • Healthcare Systems • Financial Platforms • Middleware • CRM • Social Media APIs • Databases • E-commerce • Workflow Automation • HubSpot • Salesforce • QuickBooks API • NetSuite Integration • Odoo ERP Development • Zoho Books API I help businesses connect platforms, automate workflows, and build scalable AI-powered systems using APIs, LLMs, and modern backend technologies. My expertise includes API integrations, AI agents, OpenAI-powered applications, payment gateway systems, CRM/ERP synchronization, workflow automation, and custom middleware development. I focus on building reliable integrations that improve operational efficiency, reduce manual work, and scale smoothly with business growth. Core Expertise: ✔ API Integrations ✔ AI Agents & LLM Applications ✔ OpenAI API & Automation ✔ Payment Gateway Integrations ✔ QuickBooks & Xero Integrations ✔ CRM & ERP Systems ✔ Twilio, WhatsApp & Messaging APIs ✔ Webhooks & Microservices ✔ Healthcare & Financial Systems ✔ E-commerce Integrations ✔ Custom Backend Development Tech Stack: Node.js • NestJS • Python • FastAPI • Express.js • PostgreSQL • MongoDB • Redis • REST APIs • GraphQL • Docker • AWS • Firebase I’ve worked on integrations involving payment platforms, accounting systems, AI chatbots, communication APIs, SaaS products, and enterprise workflow automation systems. Why clients work with me: ✅ Clean and scalable architecture ✅ Fast communication and reliable delivery ✅ Business-focused solutions ✅ Long-term maintainable systems ✅ Strong debugging and problem-solving skills If you need an experienced developer to build secure integrations or AI-powered automation systems, feel free to invite me to your project or schedule a quick chat. Full Stack Developer | MERN Stack Developer | Base44 Developer| React.js Developer | Next.js Developer | Node.js Developer | JavaScript Developer | Web Application Development | Custom Web Applications | SaaS Development | MVP Development | Startup Developer | Scalable Web Applications | Backend Developer | Frontend Developer | API Integration | REST API Development | GraphQL API | API Developer | Third-Party Integrations | Payment Gateway Integration | Stripe | PayPal | CRM Integration | HubSpot | Zoho| Salesforce | Dashboard Development | Admin Panel Development | Automation Developer | Workflow Automation | Zapier | Make | Integromat | n8n | Database Design | MongoDB | PostgreSQL | MySQL | Firebase | Supabase | Redis | Real-Time Applications | Web Performance Optimization | Responsive Web Design | Tailwind CSS | Modern UI/UX | Cloud Deployment | AWS | Vercel | Docker | CI/CD Pipelines | GitHub Actions | Serverless Architecture | Microservices Architecture | Secure Authentication | JWT | OAuth) | Role-Based Access Control | RBAC | SaaS Platforms | Marketplace Development | Booking Systems | ERP Systems | CRM Systems | Scalable Backend Systems | Twilio API | WhatsApp API | SMS API | Messaging API | VOIP Systems | Cloud Telephony | Call Automation | Auto Dialer Systems | IVR Systems | Call Routing | WebRTC | SIP Integration | Call Recording & Analytics | CRM Calling Integration | QuickBooks Online Integration | QBO Automation | Accounting Workflow Automation | Financial Data Sync | Invoicing & Payments Sync | Expense & Transaction Automation | Bookkeeping Integrations | POS to QuickBooks Sync | Payroll & Reporting Automation | NetSuite Integration | Odoo ERP Development | Zoho Books API Integration | ERP & Accounting Software Integrations

I started working on PHP web apps. Most of my time was spent on backend logic, databases, and keeping older systems running. Pretty early on I noticed a pattern. Things did not break because of code most of the time. They broke because the data was messy or the system structure did not make sense. That pushed me to focus more on backend work. I started building APIs and working with data from different sources. A lot of it was not clean. I spent time making it consistent and usable without making the system too complex. Over time I took on more responsibility around how systems are put together. I still write code, but I also think about where logic should live and how data moves through the system. I have also helped coordinate work on some projects, but I always stay close to the backend. I prefer to stay hands on and understand what is actually running. Most of the work I take on now is not building from scratch. It is fixing systems that already work but feel off. Slow, messy, or hard to extend. That is usually where I can help the most.

WANT A WEB APPLICATION THAT LOOKS GREAT, PERFORMS FAST, AND ACTUALLY SOLVES REAL BUSINESS PROBLEMS? YOU ARE IN THE RIGHT PLACE. I'm a Full Stack Developer & Backend Engineer specializing in React, Next.js, Node.js, Python, Go, FastAPI, and Django, building scalable SaaS platforms, AI-powered applications, DevOps pipelines, and high-performance web and mobile apps for startups, growing businesses, and ambitious founders. You bring the vision. I build the product: frontend to backend, cloud deployment to AI automation. FULL STACK & BACKEND SERVICES I OFFER ✅ Full Stack Web Application Development ✅ Frontend Development (React, Next.js, Responsive UI/UX) ✅ Backend Development (Node.js, Python, Go, FastAPI, Django, NestJS) ✅ REST API & GraphQL Development ✅ Microservices & Serverless Architecture ✅ SaaS Platform Development ✅ AI Integration, LLM-Powered Apps & AI Agent Workflows ✅ MVP Development for Startups ✅ Mobile App Development (Flutter, React Native) ✅ DevOps, CI/CD Pipelines & Cloud Deployment ✅ Database Design (PostgreSQL, MySQL, MongoDB, Redis, Firebase) ✅ Docker, Kubernetes & Container Orchestration ✅ AWS, GCP & Azure Cloud Infrastructure ✅ Payment Gateway & Third-Party API Integration ✅ Ongoing Support & Maintenance WHAT I DELIVER ✔ React & Next.js Frontend: Fast, responsive, conversion-focused interfaces built for real users ✔ Node.js, Python & Go Backend: Scalable server-side logic, clean APIs, and secure data handling ✔ FastAPI & Django Systems: High-performance Python backends built for speed and reliability ✔ DevOps & Cloud Automation: Docker, Kubernetes, GitHub Actions CI/CD, AWS Lambda, ECS, EC2 ✔ SaaS & Web App Development: End-to-end platforms designed to grow with your business ✔ AI Agents & LLM Integration: Customer support bots, HR assistants, sales automation, RAG systems, OpenAI API workflows ✔ Mobile Apps: Cross-platform Flutter & React Native apps ✔ MVP Builds: From idea to working product, fast and lean ✔ Clean, Scalable Architecture: Microservices, serverless, and cloud-ready systems AI WORKFLOW AUTOMATIONS I BUILD ✔ Customer Support: Chatbots & Voice Assistants ✔ HR: AI Recruiters & Policy Assistants ✔ Sales & Marketing: Lead Scorers & Chat-to-Lead Converters ✔ Operations: Schedulers & Report Generators ✔ Finance: Invoice Bots & Forecast Models ✔ Data & Product: AI Analytics Agents & Anomaly Detectors WHO I WORK WITH 1. Startups building their first product or MVP 2. Founders who need a technical partner, not just a coder 3. Businesses scaling their SaaS platform 4. Teams integrating AI agents into existing operations 5. Companies needing DevOps, cloud infrastructure, or automation 6. Agencies needing reliable full stack execution WHY CLIENTS CHOOSE ME ✔ Full Stack + Backend + DevOps in one developer ✔ React, Node.js, Python & Go: rare multi-stack expertise ✔ AI-Ready: LLM integration, AI agents, and automation workflows ✔ DevOps Mindset: deploy once, monitor always, scale effortlessly ✔ Business-Focused: I think about your users and goals, not just the code ✔ Clean, Documented, Production-Quality Code ✔ Clear Communication & Reliable Delivery I don't just write code. I build products that work, scale, and deliver value from day one. LET'S BUILD SOMETHING GREAT If you need a Full Stack Developer, Backend Engineer, or DevOps expert who can handle everything from React frontends and Python/Go backends to AI automation and cloud deployments, let's talk. 📩 Send me a message today and let's turn your idea into a working, scalable product. Best regards, Gabriel Daramola Full Stack Developer | Backend Engineer & DevOps | React, Next.js, Node.js, Python, Go | SaaS, AI & Cloud React, Next.js, Node.js, Python, FastAPI, Django, TypeScript, JavaScript, Full Stack Developer, Backend Developer, Frontend Developer, Backend Engineer, API Engineer, Senior Developer, SaaS, MVP, AI Integration, LLMs, RAG, OpenAI API, LangChain, AI Agents, Scalable Systems, REST API, GraphQL, Microservices, Serverless, Docker, Kubernetes, AWS, CI/CD, PostgreSQL, MongoDB, Redis, Firebase, DevOps, Cloud Deployment, GitHub Actions, System Architecture, Web & Mobile Dev, Flutter, React Native, Go, Golang, NestJS, Express.js, Flask, Gin, Fiber, Echo, Django, FastAPI, SQLAlchemy, Prisma, tRPC, Vue.js, Nuxt.js, Svelte, SvelteKit, TailwindCSS, Material UI, Chakra UI, shadcn/ui, Expo, PWA, Webpack, Vite, Responsive Design, UI/UX, Web Performance, Core Web Vitals, MySQL, Firestore, Supabase, PlanetScale, DynamoDB, Elasticsearch, Cassandra, SQLite, CockroachDB, Neon, Vector DB, Pinecone, Weaviate, ChromaDB, Qdrant, GCP, Azure, Lambda, EC2, ECS, S3, RDS, CloudFront, Vercel, Netlify, Railway, Render, Heroku, GitLab CI, Jenkins, CircleCI, Terraform, Ansible, Nginx, Linux, Bash, Shell Scripting, Prometheus, Grafana, ELK Stack, Datadog, Sentry, Cloudflare, Claude API, Gemini API, LlamaIndex, Hugging Face, Chatbots, Voice Assistants, Automation, Custom AI, AI-Driven Systems, Whisper