d4mr
Prithvish Baidya — systems engineer — d4mr.com
You might also know me as earthish or d4mr (deformer).
highlights
- ETHIndia 2024 Winner — 1st place with zkRail. ZK proofs meet game theory meet fiat rails.
- ERC-7518 co-author — an actual Ethereum standard I helped write. for compliant RWA tokenization.
- Zypherpunk 2025 - 1st place Electric Coin Company track, Network State + Raybot + Tachyon bounties
- Built the first ERC-4337 multichain wallet — weekend hackathon POC at Biconomy that became a thing.
- engine-core — production Rust web3 backend of your dream. the best thing I've ever built.
things I've built
zkRail — ETHIndia 2024 Winner
Smart contracts executing real-world payments without bank accounts. Zero-knowledge proofs meet game theory. Won Coinbase, CDP, and Polygon tracks because apparently the judges were as hyped as I was.
2.5 years of learnings distilled into 25k lines of Rust. Sophisticated nonce management, crash recovery, exactly-once delivery. All that coordination complexity that used to keep me up at 3am debugging nonce sync hell? Gone. The flow became poetry: recover, confirm, send, yield.
inside engine-core also lies BullMQ-lite. We built twmq because nothing had the queue semantics we needed.
Transparent to shielded Zcash transactions. Unified Rust core, WASM for web. Privacy is cool.
Batch image processing entirely client-side. No uploads, no registration, no ads, no bullshit. Just works.
Rust CLI to dump directory structure and file contents for LLM context. Built it because I needed it.
Golang CLI for dynamically embedding targeted ads into podcast media files.
the stack
Backend: Rust, TypeScript, Go, GraphQL, PostgreSQL, Redis, Kafka
Web3: Solidity, Viem, ERC-4337, EIP-2771, EIP-7702, L2/Rollups, FHE
Frontend: React, Next.js, Tailwind, Tanstack (yes I can frontend, I just prefer not to)
where I've been
thirdweb — Software Engineer (2024-2025)
Built Engine and Vault. Production transaction infrastructure and non-custodial key management secured with AWS Nitro Enclaves. Got to "rewrite it in Rust" and actually ship it.
Zoniqx — Lead Architect (2022-2024)
Co-authored ERC-7518. Built first compliant RWA tokenization layer on XRPL. Led major rewrites because sometimes you just have to burn it down and start fresh.
Biconomy — Software Engineer (2021-2022)
Helped gasless infrastructure revamp processing millions of transactions for clients like JP Morgan. Built the first multichain ERC-4337 wallet as a weekend hackathon POC.
Libertas Network — Senior Fullstack Developer (2021)
First full-time role building blockchain-based censorship-resistant podcasting infrastructure.
writing
I write about weird edge cases, 3am debugging sessions, and "wait why does this have two valid hashes" rabbit holes.
Latest on d4mr.com/posts:
find me
Open to chatting about engineering, distributed systems, or collaboration. (Hire Me!) DM me.