Harjot P.

Full stack and AI developer who turns your idea, prototype or half finished codebase into a SaaS product, AI feature, API or automation that real users rely on. 10 years shipping React, Next.js, Node.js and Python web apps, plus native iOS and Android apps. I build with Codex, Claude Code, Cursor and DeepSeek Harness daily, so you see a working MVP in week two, not week eight. 🏆 Built and Shipped ✔ A production AI voicebot on Twilio Voice, WebRTC and OpenAI Realtime, live with real users, built solo ✔ LLM features that answer questions over live SQL data, return validated structured output, call tools and hand off to human review ✔ A WhatsApp Business Cloud API assistant that turns voice notes into structured tasks ✔ Multi tenant SaaS on Postgres with row level security; Stripe subscriptions and Stripe Connect seller onboarding and payouts ✔ HIPAA healthcare software handling PHI: insurance eligibility over EDI 270/271 (Availity, Stedi), 835 remittances matched to claims, FHIR and SMART on FHIR ✔ An enterprise field operations app with offline sync and audit logging, live on the App Store and Google Play 🤖 AI Developer | LLM Apps and AI Agents • Latest models: OpenAI API (GPT-6.1, GPT-6 Astra), Claude API (Opus 5.5, Sonnet 5.5, Fable 5.1), Gemini 4 Argon and 3.8 Flash, DeepSeek, Llama, Hugging Face • Streaming, prompt caching, model routing, token cost control, RAG, embeddings, semantic search, vector databases (pgvector, Pinecone, Qdrant), Vercel AI SDK, hands on with LangChain and LangGraph • AI agents and agentic workflows: function calling, tool use, multi step orchestration, MCP servers, OpenAI Agents SDK • AI chatbots and assistants, voice AI (Whisper, ElevenLabs, speech to text), document processing, OCR, computer vision, content and image generation • Machine learning (PyTorch, TensorFlow, scikit-learn), fine tuning open models, on device AI with Core ML, Apple Foundation Models, TFLite and ML Kit 🚀 SaaS Developer | Full Stack Web Apps • MVP to paying product in React, Next.js, Vue.js, Angular, Node.js, Express, NestJS, Python, Django, FastAPI, PHP, Laravel, Ruby on Rails, Tailwind CSS, Redux, TanStack Query and tRPC • Databases: PostgreSQL, MySQL, MongoDB, Supabase, Firestore, Redis and SQLite • Cloud and DevOps: AWS (ECS, EKS, Lambda, RDS, S3, DynamoDB), Google Cloud, Firebase, Azure, Vercel, Cloudflare Workers, Docker, Kubernetes, CI/CD with GitHub Actions and GitLab CI • Billing: Stripe (Checkout, Billing, Connect), PayPal, Paddle, Lemon Squeezy, Apple Pay, usage based billing and paywalls • Auth (Auth0, Clerk, NextAuth, SSO, SAML, 2FA), RBAC, admin dashboards, customer portals, CRM, ecommerce, Shopify, WordPress, Webflow and headless CMS • Prototype built in Lovable, Replit or Cursor? I make it production ready: security, payments, tests and deployment 🔌 API Developer | Backend and Integrations • REST and GraphQL API design, webhooks, WebSockets, gRPC, OpenAPI and Swagger, JWT and OAuth 2.0, rate limits, caching and versioning • Third party API integration: Square, Twilio, Google Maps, Google Workspace, HubSpot, GoHighLevel, Salesforce, Airtable, Notion, QuickBooks, Zendesk, Jira and App Store Connect API • HL7 messaging and EDI 837 claims, SOAP and XML to REST migrations, CRM and ERP integration ⚙️ Automation Expert | Workflows and Data Pipelines • Business process automation with n8n, Make, Zapier, Google Apps Script, Python scripts and cron jobs • Web scraping and browser automation with Playwright, Puppeteer, Selenium, Scrapy and Apify, plus AI browser agents • Slack, Telegram, Discord and WhatsApp bots, email, marketing, sales and CRM automation, lead generation • ETL pipelines, reporting, PDF and invoice automation, event driven automation with Cloud Functions, AWS Lambda and webhooks • AI automation: LLM workflows and Claude Code agents set up inside your team and repo 📱 iOS Developer | Android Developer | Flutter and React Native • Native iOS in Swift, SwiftUI, UIKit and Objective-C, Android in Kotlin and Jetpack Compose, cross platform in Flutter, React Native and Expo • Subscriptions (StoreKit 2, Google Play Billing, RevenueCat), push notifications, Firebase, offline first sync, HealthKit, MapKit, ARKit, WidgetKit, Bluetooth BLE, NFC, deep linking • App Store and Google Play submission, TestFlight, review rejections, Fastlane, XCTest, crash fixing, performance, Objective-C to Swift migrations 🤝 How I Work ✔ You talk to me directly, never an account manager, with clear written updates and an honest call when a feature is not worth building ✔ AI speeds up the typing. Every generated line is reviewed, typed and tested, 99.8 percent plus crash free, and I still own the architecture and the result ✔ Technical lead when you need one: architecture, code review, refactoring, QA and test automation, security audits, GDPR and rescuing legacy projects 📩 Send me what you are building. I will reply with how I would build it, the risks I see and what it will take.