Portfolio · hello-sachin.vercel.app
I ship products, not just features — owning everything from schema design to the last pixel.
I build and ship production software across the full stack:
| Layer | What I own |
|---|---|
| Product & UI | Polished, accessible interfaces • real-time & streaming UIs • motion design |
| Frontend Architecture | Scalable React/Next.js apps • render optimization • bundle control |
| Backend & APIs | NestJS/Node services • webhook-safe payment flows • role-based access systems |
| Data & Infra | PostgreSQL/MongoDB schema design • Supabase • Docker • AWS deploys |
| AI Integration | LLM streaming pipelines • persistent memory architectures • agentic workflows |
Frontend
Backend
Cloud & Infra
AI-Native Workflow
I don't use AI to replace thinking. I use it to accelerate execution.
🤖 AI Digital Persona Platform Full-stack AI product — Gemini + Mem0 persistent memory architecture, real-time streaming conversational UI, subscription billing. Owned frontend, backend, and AI pipeline.
💳 Stripe Subscription Engine Complete subscription lifecycle — checkout, webhook-safe DB sync, plan upgrades/downgrades, dunning. Built to survive out-of-order webhook delivery.
📊 Enterprise Operations Dashboard Handles 15k+ monthly tickets, approvals & transactions. Role-based team/workspace system, optimized re-render cycles across complex data-heavy views.
📱 QR Asset Tracking System React Native app + backend for physical asset tracking with QR workflows.
- Designed webhook-safe payment sync logic that handles retries, races, and out-of-order events
- Built streaming API pipelines end-to-end: server-sent tokens → buffered rendering → smooth UI
- Architected role-based team/workspace systems (auth, permissions, invitations)
- Refactored large legacy React surfaces without visual regressions
- Profiled and eliminated re-render bottlenecks in production dashboards
1. Ship fast, refactor faster
2. Performance is a feature
3. Own the whole stack — no "not my layer"
4. UI is product, not decoration
5. Clean code scales, hacks don't
Open to building products that matter. Let's talk → sachin7368kr@gmail.com