# Agnij Dutta

> I build products, protocols and the infrastructure under them. Then I run them in production. Agnij Dutta: full-stack and Web3 engineer in Bengaluru, open to select freelance and contract work. I co-founded Rump Labs and build smart contracts, stablecoin payments and production infrastructure.

I am Co-founder, Rump Labs, based in Bengaluru, India, studying at IIT Madras (Bachelors, Data Science and Mathematics). I work on stablecoin payments, smart contracts, zero-knowledge proofs and AI agent spend controls.

## Availability: freelance and contract Web3 work

- Status: Open to freelance and contract work. Remote, worldwide, from Bengaluru, India (UTC+5:30).
- Role: freelance Web3 and blockchain engineer, full-stack. Founding engineer at a stablecoin neobank.
- Takes on:
  - Solidity smart contracts on EVM chains, tested in Foundry to full coverage.
  - Solana programs in Anchor (Rust), Stellar contracts in Soroban.
  - dApps: Next.js, wagmi and viem front ends wired to contracts and indexers.
  - Stablecoin payments: USDC rails, webhooks, reconciliation and fee accounting.
  - Zero-knowledge circuits in Circom, private KYC and encrypted tokens.
  - AI agent payments: on-chain spend limits, x402 and ERC-8004.
- Chains and languages: Ethereum, Base, Avalanche, Solana, Stellar, Flare, Starknet, 0G, Solidity, Rust, Circom, TypeScript, Go
- Hire: email agnijdutta413@gmail.com or [book a 30-minute call](https://calendly.com/agnijdutta413/30min?utm_source=llms.txt)
- [Hire page](https://www.agnij.me/hire)

## Questions

### Is Agnij Dutta available for freelance Web3 work?

Yes. Agnij Dutta takes a small number of freelance and contract Web3 engagements through Rump Labs, a studio Agnij co-founded. The call is with Agnij, and so is the work.

### What Web3 work does Agnij Dutta do?

Smart contracts in Solidity, Anchor and Soroban, dApp front ends, stablecoin payment infrastructure, zero-knowledge circuits and spend controls for AI agents with wallets.

### What has Agnij Dutta shipped?

Payment rails at Swad, a San Francisco stablecoin neobank, as a founding engineer. FLIP, funded by a Flare Foundation grant. Avacado, a bounty winner at ETHGlobal New Delhi. Capline, published on npm and deployed on three networks.

### Where is Agnij Dutta based, and is the work remote?

Bengaluru, India (UTC+5:30), originally from Kolkata. Engagements are remote, with teams in India and abroad.

### How do I hire Agnij Dutta?

Email agnijdutta413@gmail.com or book a 30-minute call at agnij.me. Engagements are scoped in writing before anything starts.

## Contact

- [Book a 30-minute call](https://calendly.com/agnijdutta413/30min?utm_source=llms.txt): preferred way to start a conversation
- Email: agnijdutta413@gmail.com
- [X @0xholmesdev](https://x.com/0xholmesdev)
- [GitHub](https://github.com/agnij-dutta)
- [LinkedIn](https://www.linkedin.com/in/agnij-dutta)
- [Rump Labs](https://www.rumplabs.xyz)

## Experience

### Rump Labs · Co-founder

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.

### Swad · Founding Engineer

One 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.

### Workwise · Founding Engineer

Took 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.
- Recovered enterprise data with PostgreSQL point-in-time recovery during a live incident, restoring 200+ relational tables to their pre-incident state.
- Built authentication and authorization end to end: JWT and OAuth 2.0 with multi-tenant RBAC and ABAC.
- Lead a team of five: set architecture, run code review, own releases gated by tests in CI.

### HackQuest · Developer Advocate

Developer education for Web3. Community growth, feature work, bug fixes.

### IIT Madras · Bachelors, Data Science and Mathematics

Major in Data Science, minor in Machine Learning.

## Projects

### Capline · LIVE · npm

Spend limits for AI agents that a jailbreak can't talk its way past.

- Published on npm as capline (0.1.1).
- Deployed on Solana devnet, Avalanche Fuji and Stellar testnet.
- Two layers: the signer refuses, and if the key is stolen anyway, the contract reverts CapExceeded on-chain.
- Stack: Solidity, Anchor (Rust), Soroban, TypeScript, x402, ERC-8004
- [Detail page](https://www.agnij.me/work/capline)
- [Live](https://capline-protocol.vercel.app)
- [Repo](https://github.com/agnij-dutta/capline)
- [npm](https://www.npmjs.com/package/capline)

### FLIP · FLARE FOUNDATION GRANT

Escrow-based settlement for Flare FAssets, instead of prefunded insurance pools.

- Funded by a Flare Foundation grant.
- 10 Solidity contracts deployed on Coston2.
- 68/68 Foundry tests, 100% coverage, plus Go agent and oracle services.
- Stack: Solidity, Foundry, Go, Next.js, XRPL
- [Detail page](https://www.agnij.me/work/flip)
- [Live](https://flip-protocol.vercel.app)
- [Repo](https://github.com/agnij-dutta/FLIP)

### Avacado · ETHGLOBAL BOUNTY · 1ST AVALANCHE TEAM1

Private, compliance-ready DeFi. Prove you passed KYC without showing who you are.

- Bounty at ETHGlobal New Delhi (2,000+ participants).
- 1st of 100+ teams at Team1 Incubator, Kolkata.
- ZK KYC via Self.xyz plus an encrypted ERC-20 on ElGamal, Baby JubJub and Groth16.
- Stack: Circom, Solidity, Next.js, Self.xyz
- [Detail page](https://www.agnij.me/work/avacado)
- [Live](https://www.avacado.app)
- [Repo](https://github.com/agnij-dutta/Masta-chefs)

### Sibyl · SHIPPED

Incident investigation where the AI does the digging, then shows its evidence.

- Postgres, ClickHouse, Qdrant and Redis behind one ingest path.
- Root cause with a 0 to 100 confidence score, backed by z-score deploy correlation.
- 47 tests. Node and Python SDKs.
- Stack: Next.js, Hono, ClickHouse, Qdrant, Gemini
- [Detail page](https://www.agnij.me/work/sibyl)
- [Live](https://sibyl-jade.vercel.app)
- [Repo](https://github.com/agnij-dutta/sibyl)

### Atlas · LIVE ON BASE SEPOLIA

Multi-step workflows as on-chain state machines, run by a permissionless executor network.

- 147/147 tests.
- UUPS contracts deployed and upgraded on Base Sepolia; a 2-step workflow created, executed and completed on-chain.
- MEV-resistant deterministic executor selection.
- Stack: Solidity, Foundry, viem, The Graph, Next.js
- [Detail page](https://www.agnij.me/work/atlas)
- [Repo](https://github.com/agnij-dutta/atlas)
- [Explorer](https://base-sepolia.blockscout.com/address/0xc17F81db41a12a396e54DA9694B323148c945117)

### Dhvani · LIVE

Speak in any of 22 Indian languages, get a grounded, cited answer.

- Retrieval P50 21.8ms over 150 real queries on an M4, measured.
- 62,872 vectors searched in-process, no network hop in the retrieval path.
- Guardrails for injection, off-topic and grounding.
- Stack: TypeScript, ONNX embeddings, Groq, Sarvam STT, SSE
- [Detail page](https://www.agnij.me/work/dhvani)
- [Repo](https://github.com/agnij-dutta/dhvani)
- [Live](https://dhvani-rpf3.onrender.com): free tier, cold starts

### DOOMA · LIVE · 0G TESTNET

A public AI courtroom. Stake it, argue it, let the crowd pick a side, get paid out by escrow.

- Create, accept, AI ruling and on-chain payout proven end to end on 0G Galileo.
- 2.5% protocol fee math verified on testnet.
- Built for The Zero Cup.
- Stack: Solidity, Foundry, Next.js, wagmi, 0G
- [Detail page](https://www.agnij.me/work/dooma)
- [Live](https://dooma.vercel.app)
- [Repo](https://github.com/agnij-dutta/dooma)

### Cerberus · OPEN SOURCE

Rate limiting as a service, atomic down to the Redis script.

- Sliding-window and token-bucket limiters in Redis Lua behind a 3-tier cache.
- Designed for 50K+ checks/sec at sub-1.5ms p99.
- 4 SDK and middleware packages.
- Stack: Python, FastAPI, Redis Lua, Postgres, Prometheus
- [Detail page](https://www.agnij.me/work/cerberus)
- [Repo](https://github.com/agnij-dutta/cerberus)

## Also shipped

- [Solva](https://github.com/agnij-dutta/solva): ZK solvency proofs on Starknet
- [TVA](https://github.com/agnij-dutta/tva): Solidity to Soroban compiler, 4th at Build on Stellar
- [Tempus](https://github.com/agnij-dutta/tempus): ephemeral AWS preview envs in Terraform
- [Strate](https://github.com/agnij-dutta/strate-protocol): RWA yield stripping on Soroban
- [Wend](https://trywend.vercel.app): notes that dispatch to Claude Code, private alpha

## Wins and grants

- Bounty, ETHGlobal New Delhi (2,000+ participants), for Avacado
- 1st of 100+, Team1 Incubator, Kolkata, for Avacado
- Grant, Flare Foundation, for FLIP
- 2nd, East India Blockchain Summit, IIT Kharagpur
- 2nd, Tech Triad Hackathon, IIT Kharagpur
- 2nd, AI Hackathon at KSHITIJ, IIT Kharagpur
- 3rd, Edu-Chain Regional Hackathon, Kolkata
- 4th, Build on Stellar, Kolkata, for TVA

## How I can help

I take a small number of technical engagements through Rump Labs. The call is with me, and so is the work.

- A technical second opinion: A spec, a half-built repo, or a quote you don't trust. I tell you what breaks first. Proof: The 36-hour outage at Swad began as a one-line parsing bug.
- A first version that runs: One core flow, deployed on infrastructure you own, not a laptop demo. Proof: Capline shipped as an npm package on three networks.
- Infrastructure that stays up: Webhooks, queues, migrations, money movement. The parts nobody demos, everyone pages about. Proof: Payment rails at Swad. 300K requests/minute at Workwise.
- Protocols, ZK, agent payments: Contracts, circuits and spend guardrails, tested like someone hostile is reading them. Proof: 68/68 on FLIP. 147/147 on Atlas.

## GitHub

- Public repos: 52
- Public contributions, last 12 months: 3,929
- Last public push: 15 Sep 2026

## Pages

- [Home](https://www.agnij.me/)
- [Hire](https://www.agnij.me/hire): Agnij Dutta is a freelance Web3 and blockchain engineer in Bengaluru, India, open to select contract work: smart contracts, dApps, stablecoin payments, ZK and AI agent payments. Remote, worldwide.
- [Capline](https://www.agnij.me/work/capline): Spend limits for AI agents that a jailbreak can't talk its way past.
- [FLIP](https://www.agnij.me/work/flip): Escrow-based settlement for Flare FAssets, instead of prefunded insurance pools.
- [Avacado](https://www.agnij.me/work/avacado): Private, compliance-ready DeFi. Prove you passed KYC without showing who you are.
- [Sibyl](https://www.agnij.me/work/sibyl): Incident investigation where the AI does the digging, then shows its evidence.
- [Atlas](https://www.agnij.me/work/atlas): Multi-step workflows as on-chain state machines, run by a permissionless executor network.
- [Dhvani](https://www.agnij.me/work/dhvani): Speak in any of 22 Indian languages, get a grounded, cited answer.
- [DOOMA](https://www.agnij.me/work/dooma): A public AI courtroom. Stake it, argue it, let the crowd pick a side, get paid out by escrow.
- [Cerberus](https://www.agnij.me/work/cerberus): Rate limiting as a service, atomic down to the Redis script.