Ammad F.

🚀 Built SaaS for 16+ months straight for a Canadian startup. Rails, React, Vue, Node, TypeScript, AWS, AI. I don’t do one-off sprints, I build products. I’m a full-stack engineer with 8+ years of experience building, scaling, and rescuing web and mobile applications. I specialize in Ruby on Rails, Node.js, TypeScript, React, Vue, and React Native, with strong experience in AWS deployments, SaaS platforms, marketplaces, CRMs, dashboards, REST APIs, third-party integrations, AI-powered features, and business automation. HIRE ME WHEN YOU NEED TO - Launch an MVP or SaaS product that's production-ready, not a prototype - Build or redesign a REST/GraphQL API and connect it to a web or mobile frontend - Ship an iOS/Android app with React Native (Expo) on top of a new or existing backend - Integrate payments (Stripe, PayPal, Paystack), CRMs, email, SMS, chat, analytics, or any third-party API - Automate manual workflows with Python scripts, background jobs, webhooks, n8n, Zapier or Make - Add AI features: OpenAI/Claude API integration, chatbots, document processing, LLM-powered search - Fix, refactor, or scale a legacy Rails, Django, or Node codebase that's slow, buggy, or blocking your roadmap - Migrate or upgrade: framework versions, monolith to services, Heroku to AWS, MySQL to PostgreSQL TECH STACK Backend: Ruby on Rails, Node.js (Express, NestJS), Python (Django, Django REST Framework, FastAPI, Flask), REST & GraphQL APIs, Sidekiq, Celery, WebSockets, microservices Frontend: React, Next.js, TypeScript, Vue.js, Redux, Tailwind CSS, Bootstrap, HTML5/CSS3, responsive mobile-first UI Mobile: React Native, Expo, push notifications, App Store and Play Store submission Databases: PostgreSQL, MySQL, MongoDB, Redis, Firebase, Elasticsearch Cloud & DevOps: AWS (EC2, S3, RDS, Lambda), Docker, Heroku, DigitalOcean, CI/CD with GitHub Actions, Nginx Payments & Integrations: Stripe, PayPal, Paystack, Twilio, SendGrid, HubSpot, Salesforce, Shopify, Google APIs, OAuth/SSO AI & Automation: OpenAI, Anthropic Claude, LangChain, n8n, Zapier, Make, Python scraping (Scrapy, Playwright), cron and queue workers Quality: TDD (RSpec, Jest, pytest), code review, Git/GitHub/GitLab, Agile/Scrum, Jira INDUSTRIES I'VE SHIPPED FOR SaaS and B2B tools, marketplaces and booking platforms, fintech and payments, e-commerce, healthcare and telehealth, real estate and property management, EdTech/LMS, logistics and delivery, HR and recruiting, CRM and sales automation, analytics dashboards and admin panels. HOW I WORK - Written scope and estimate before work starts. If something changes, you hear about it before it costs you. - Daily progress updates, so you always know where things stand and what's next - Tested, documented, reviewed code that any future developer can pick up - Overlap with UK/EU hours and US mornings. Async-friendly. RECENT RESULTS - Full-stack engineer for a Canadian AI startup: 1,300+ hours over 16 months, Rails and React, 5.0 rating. Client's words: "Consistently delivers high-quality, maintainable code and adapts quickly to our tech stack." - Web app API integrations: 960 hours over 9 months, 5.0 rating - Marketplace platform in Ruby on Rails and React, spec to production - OTT streaming MVP, built and launched - Messaging app on Rails and Sidekiq: real-time delivery, background jobs, third-party integrations - Legacy rescue: Heroku-24 migration and asset pipeline crash fixed in a 3-week engagement Available for two-day fixes, fixed-price builds, and long-term retainers. Send your brief, repo, or Figma, and I'll reply with a plan within 24 hours. Keywords: Full Stack Developer | Ruby on Rails Developer | Node.js Developer | Python Developer | Django Developer | Django REST Framework | FastAPI | Flask | React Developer | React Native Developer | Expo | Mobile App Development | iOS | Android | Next.js | TypeScript | Vue.js | Web Application Development | SaaS Development | MVP Development | API Development | REST API | GraphQL | API Integration | Stripe Integration | Payment Gateway | Marketplace Development | CRM Development | Admin Dashboard | E-commerce Development | Shopify API | Business Automation | Workflow Automation | n8n | Zapier | Make | AI Integration | OpenAI API | ChatGPT | Claude API | LLM | Chatbot Development | Web Scraping | PostgreSQL | MySQL | MongoDB | Redis | AWS | Docker | Heroku | CI/CD | Microservices | Legacy Code Refactoring | Performance Optimization | Bug Fixing | TDD | Agile