Sheeraz W.

Need a full stack developer to take your SaaS, AI product or mobile app from MVP to production? I build scalable web apps, AI-powered platforms and React Native mobile apps with React, Next.js, Node.js, .NET and OpenAI, for startups and growing businesses in healthcare, construction, staffing, telecom and food distribution. Across 4+ years and 20+ full-stack projects, I've launched SaaS MVPs, replaced spreadsheets and legacy databases with custom CRM and ERP systems, and shipped production AI features (LLM integrations, AI agents, speech-to-text, automation) to real users. RECENT PROJECTS ▸ docuCODER Surgery | Healthcare AI SaaS A physician talks through the procedure and the platform delivers a CPT-coded surgical report by the end of the case. A chain of AI agents handles transcription, procedure matching and gap detection against each hospital's own coding rules, with a human in the loop. Built for HIPAA: PHI masking, audit logs, BAA-covered APIs. Result: time to bill cut from the industry average of 3–7 days to zero. Stack: React, Next.js, Node.js, FastAPI, MongoDB, WebSockets, OpenAI, Claude, LangChain, Deepgram, AWS ▸ Procure Builder | Construction ERP (Web + iOS App) Took a $20M multi-site construction company off Excel, WhatsApp and verbal updates. Admins see actual vs planned spend across sites, engineers raise purchase orders that approvers sign off remotely, and field teams find materials down to warehouse, zone and aisle. Stack: .NET, React, TypeScript, Tailwind CSS, Ant Design ▸ Westrow Food Group | Internal Platform & Data Migration Replaced a legacy MySQL system and a wall of spreadsheets for a food brokerage selling into every major Canadian retailer. One source of truth now links 135 clients, 165 retail customers and every product spec. Migrated 15+ years of legacy data to PostgreSQL through a custom, re-runnable ETL pipeline. Stack: Next.js, NestJS, React, TypeScript, PostgreSQL, Docker, Jenkins ▸ IVY Estate Agency | Staffing & Recruitment Platform Replaced a hiring pipeline run across spreadsheets, email and WhatsApp for a luxury household staffing agency (private chefs, estate managers). Candidates build profiles and apply, the agency tracks every stage with a full audit trail, and clients review candidates in a scoped review window instead of waiting on status emails. Stack: ASP.NET 8, React 19, PostgreSQL, AWS (ECS, RDS, S3, CloudFront), GitHub Actions CI/CD ▸ Telecom Operations Platform (NDA) | Commission Engine Replaced a generic CRM and Excel commission math with one operations platform built around a rules-driven commission engine: split deals, manager overrides, renewals and clawbacks, all tracked automatically. Run against a real historical month, it matched (and in places corrected) the spreadsheet payouts line by line, and commission disputes dropped at the first month-end. Stack: Next.js, NestJS, PostgreSQL Also built: DPM Journal (AI-assisted iOS app, live on the App Store), Kohif Pharmagenix (precision-medicine EHR with AI clinical decision support), a pharma distribution CRM that replaced 7 spreadsheets and an Access database, and an OpenAI SMS booking bot. SERVICES ✔ SaaS development: multi-tenant platforms, subscriptions, Stripe billing, admin panels ✔ AI integration: OpenAI / ChatGPT and Claude APIs, AI agents, RAG, chatbots, workflow automation ✔ Custom CRM, ERP and business dashboards that replace spreadsheets ✔ Web app development with React, Next.js and TypeScript ✔ Mobile app development with React Native (iOS & Android) ✔ Backend & API development: Node.js, NestJS, .NET, Python, REST APIs, third-party integrations ✔ Cloud deployment and DevOps: AWS, Azure, Docker, CI/CD HOW I WORK ✔ Written scope and milestone-based payments before we start ✔ A working demo after every sprint ✔ QA-tested releases on clean, modular, scalable architecture ✔ Clear communication with daily overlap in US Eastern and UK hours LET'S WORK TOGETHER Share your idea or current setup and I'll come back with a suggested approach, tech stack and milestone plan for your MVP, SaaS platform, AI feature or mobile app. KEYWORDS AI Developer, Full Stack Developer, SaaS Developer, MVP Development, AI Integration, AI Agents, LLM, OpenAI API, ChatGPT Integration, Claude API, LangChain, RAG, AI Chatbot, AI Automation, React Developer, Next.js Developer, Node.js Developer, NestJS, .NET Developer, ASP.NET Core, C#, React Native Developer, Mobile App Development, iOS App Development, Android App Development, Web App Development, Custom CRM Development, ERP Development, Multi-Tenant SaaS, REST API, API Integration, TypeScript, Python, FastAPI, PostgreSQL, MongoDB, Firebase, Supabase, Redis, AWS, Azure, Docker, CI/CD, Stripe Integration, Twilio, Data Migration, Healthcare Software, HIPAA Compliance