Full Stack Engineer
Hi, I'm Bhavsagar
Full Stack Engineer with 3.5+ years shipping SaaS, fintech, healthcare, and AI products — React, Next.js, Node.js, TypeScript, PostgreSQL, and React Native from API to deploy.
3.5+ yrs
Experience
Full Stack
Focus
AI-native SaaS
Specialty
What I build
Production APIs, databases, and UIs — SaaS dashboards, mobile apps, AI features, and deployable systems.
Full Stack Engineer with 3.5+ years building and shipping production systems end to end — React, Next.js, Node.js, TypeScript, PostgreSQL, and React Native.
At Prospello, I own full-stack delivery across multiple SaaS products: an AI learning platform (Groq, Cohere, RAG, learner profiles, streaming mock interviews), a fintech merchant dashboard (Razorpay, JWT auth, AI payment intelligence), a fractional real estate mobile app (Express, Prisma, Groq, Whisper voice search), a healthcare operations dashboard (Firebase auth, KPI analytics, serverless AI summaries), and an enterprise marketing site (20+ pages, guides engine, lead capture).
I design REST APIs, Prisma schemas, auth flows, and deployment pipelines — then build the UI on top with realistic loading states, error handling, and performance discipline. Shipped AI patterns across products: server-side LLM proxying, streaming responses, embedding-based RAG, session memory, and abort-safe generation.
Earlier: large-scale EdTech at Allen Digital (millions of users), full-stack MERN development at GeeksForGeeks, and measurable wins including +35% LCP, -70% mobile crash rate, and -50% redundant API calls.
Experience
Full-stack ownership across SaaS, fintech, healthcare, AI platforms, and EdTech at scale.
- Build and ship MVPs from PRDs, translating product requirements into production-ready UI and full-stack features across AI, LMS, healthcare, and fitness SaaS products.
- Shipped AI LMS Tutor — Next.js App Router platform with 13-lesson curriculum, Groq/Cohere AI (learn, quiz, mock interview, review), RAG PDF chat, learner profile aggregation, mentor personality engine, and Prisma + Neon PostgreSQL.
- Shipped Fintech Pay — merchant dashboard with Razorpay payment links and settlements, JWT auth, transaction ledger with CSV export, rule-based revenue intelligence, and Groq AI assistant grounded in live account data.
- Shipped BrickShare — React Native + Expo fractional real estate app with Express REST API, JWT sessions, KYC/investment flows, portfolio tracking, and server-side Groq + Whisper voice search proxy.
- Shipped MediCore — healthcare operations dashboard with Firebase auth, KPI analytics, patient CRUD, Recharts, Groq AI patient summaries (streaming in dev, Vercel serverless in prod), and service-worker notifications.
- Shipped Solinify — enterprise marketing website (20+ routes): data-driven service/product pages, guides engine, docs hub, case studies, contact API, cookie consent, and Lenis smooth scroll.
- Established reusable AI patterns: server-side API key proxying, streaming + abort controllers, embedding-based RAG, session/learner memory, and demo-fallback modes for recruiter-friendly deployments.
- Delivered measurable performance wins: +35% LCP via Next.js SSR/ISR and code splitting, -70% mobile crash rate on React Native health app, -50% redundant API calls via TanStack Query caching.
- Built real-time video classroom infrastructure (LiveKit, Zoom Video SDK) and cross-platform health app (Expo → Native CLI) with care-team workflows and push notifications.
Technical Focus
Full-stack TypeScript, React ecosystem, PostgreSQL, API design, AI/LLM integration, and cloud deployment.
Daily drivers
6 technologies
Core
7 technologies
State & Data
5 technologies
Backend & Infra
12 technologies
AI & Testing
8 technologies
Education
Formal foundation strengthened through years of production React engineering.
Selected Work
Production-grade products shipped end to end — backend, frontend, AI, and deployment.
Full-stack AI learning platform — Learn → Practice → Mock Interview → Review workflow across 13 lessons and 4 tracks. Built mentor personality engine (modes, strategies, session memory), Groq/Cohere integrations, RAG PDF chat, learner profile aggregation in PostgreSQL, and recruiter demo mode. Next.js API routes, Prisma, TanStack Query.
Full-stack merchant payments dashboard — revenue KPIs, transaction search/filter/CSV export, Razorpay payment links and settlements, rule-based anomaly detection with 7-day forecast, JWT auth, and Groq AI assistant with floating chat grounded in live account data.
Full-stack fractional real estate investment app — React Native + Expo client, Express + Prisma + PostgreSQL API, JWT auth, KYC flow, property discovery with voice search (Groq Whisper), investment pipeline, portfolio charts, and server-side Groq AI for property Q&A, summaries, and diversification insights.
Healthcare SaaS operations dashboard — Firebase auth with protected routes, KPI dashboard, Recharts analytics, patient management (search, pagination, grid/list, side panel), add-patient validation, Groq AI clinical summaries (Express streaming in dev, Vercel serverless in prod), and toast + service-worker notifications.
Get in touch
Open to Full Stack Engineer roles — React, Next.js, Node.js, TypeScript, PostgreSQL, and AI products.
Prefer async? Drop a line at bhavsagar92@gmail.com