Supratim Sarkar — Backend & Full-Stack Engineer
Open-source contributor at tiptap (37k★) · AWS Certified Solutions Architect
Durable Agent Engine — Fault-tolerant LLM agent orchestration on raw Postgres. SELECT ... FOR UPDATE SKIP LOCKED durable queue, idempotent DAG execution, crash recovery via lock-TTL reaper, cross-process pub/sub on LISTEN/NOTIFY. No Redis, no managed queue. Proven with a chaos test that SIGKILLs workers mid-run.
Node.js PostgreSQL WebSocket Docker — GitHub
FounderOS — Multi-tenant backend for a founder workspace app. Streaming AI pipeline via ReadableStream.tee(), HMAC-verified Stripe webhooks, Postgres row-level security with an isolated admin service-role client.
Next.js TypeScript PostgreSQL (RLS) Stripe GPT-4o — GitHub
Anchor — Offline-first notes with conflict-free multi-device sync. Every keystroke persisted to IndexedDB as a Yjs CRDT operation before any network call — the same replication strategy behind Figma and Notion.
Yjs (CRDTs) Tiptap/ProseMirror IndexedDB y-webrtc y-websocket — GitHub
| Repo | PR | Status |
|---|---|---|
| tiptap (37k★) | #7976 — fix character-count autoTrim boundary logic |
✅ Merged |
| tiptap (37k★) | #7977 — fix Link extension HTMLAttributes coercion |
✅ Merged |
| infisical (28k★) | #7028 — fix unreachable admin signup button (flex/scroll clipping) | 🔄 Open |
