Agnij Dutta
Full-stack · Blockchain · Systems
I build products, protocols and the infrastructure under them. Then I run them in production.
Payment rails, smart contracts, zero-knowledge circuits: I take them from a blank repo to something that survives real traffic.
Start with the hard part
Book 30 min · bring the problem
Rump Labs
A technical studio for founders: architecture reads, first working versions, and the delivery work after the code is written.
I scope it, I build it, and I stay on the call when it ships.
Capline
Spend limits for AI agents that a jailbreak can't talk its way past.
Published on npm as capline (0.1.1).
FLIP
Escrow-based settlement for Flare FAssets, instead of prefunded insurance pools.
Funded by a Flare Foundation grant.
Avacado
Private, compliance-ready DeFi. Prove you passed KYC without showing who you are.
Bounty at ETHGlobal New Delhi (2,000+ participants).
Atlas
Multi-step workflows as on-chain state machines, run by a permissionless executor network.
147/147 tests.
SwadFounding EngineerOne of the three engineers who built a San Francisco stablecoin neobank from the ground up, paying Indian freelancers their overseas income in INR. Zero crypto in the UI.
- I owned every production release from day one. Nothing reached main without me.
- Built the multi-provider webhook engine. Traced a 36-hour onboarding outage to a signature-parsing bug and shipped self-healing retry sweepers.
- Shipped the revenue P&L dashboard over 13 PRs, backing a flat 1.5% fee against a ~2.95% bank benchmark.
WorkwiseFounding EngineerTook a multi-tenant B2B platform from first commit to a measured peak of 300K requests/minute (5K req/s) for 40,000+ users. Owned system design and tenant isolation.
- Designed and own the REST APIs and a webhook-driven, event-driven pipeline: idempotent, dedup-keyed handlers with retries and a dead-letter path, so processing is at-least-once with no duplicate writes.
- Cut a core query's latency 80% on datasets above 1.5M rows with indexing, query planning, 2 read replicas and Redis caching. SigNoz distributed tracing made incident triage 40% faster.
HackQuestDeveloper AdvocateDeveloper education for Web3. Community growth, feature work, bug fixes.
IIT Madras
Bachelors, Data Science and Mathematics
A technical second opinion
A spec, a half-built repo, or a quote you don't trust. I tell you what breaks first.
The 36-hour outage at Swad began as a one-line parsing bug.
02A first version that runs
One core flow, deployed on infrastructure you own, not a laptop demo.
Capline shipped as an npm package on three networks.
03Infrastructure that stays up
Webhooks, queues, migrations, money movement. The parts nobody demos, everyone pages about.
Payment rails at Swad. 300K requests/minute at Workwise.
04Protocols, ZK, agent payments
Contracts, circuits and spend guardrails, tested like someone hostile is reading them.
68/68 on FLIP. 147/147 on Atlas.
Got a build that has to be real?
Book 30 minutes. Bring the problem, the repo, or the quote. You leave with a straight answer either way.
Replies within a day. Usually faster.
agnijdutta413@gmail.com
Fastest way to reach me directly. I read everything.