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NAME

Nitish Kumar —Protocol & backend engineer · DeFi

SYNOPSIS

nitish [--experience] [--projects] [--profiles] [--cv]

DESCRIPTION

Protocol and backend engineer at Timeswap Labs. I build the infrastructure under DeFi: indexers that turn raw chain events into positions people can trust, custody systems that check a transfer before it is signed, and order books that put a price on time. Four years across Timeswap, Liminal, Diamante and Hashmail. 40+ security vulnerabilities responsibly disclosed; Hall of Fame credits at PayU and Harvard.

EXPERIENCE

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  1. 2026 – now

    Protocol engineer, Timeswap Labs

    Sole engineer on the Rust indexer and API that replaced it. Per-chain write-ahead logs that pause rather than drop data, atomic reorg rollback with a single recovery leader, isolated Postgres pools so API load never starves ingestion, and 2,200+ tests including Anvil reorg suites.

    Rust · tokio · alloy · sqlx · axum · Datadog

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  2. 2025 – 26

    Backend engineer, Timeswap Labs

    The event platform behind a fixed-rate lending protocol: six EVM chains, 15k+ blocks a day at under two seconds, 100k+ positions. Kafka with reorg detection and idempotent replay; protocol maths re-implemented off-chain and reconciled to one wei; three contract versions migrated with zero downtime.

    TypeScript · Kafka · PostgreSQL · GraphQL · AWS EKS

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  3. 2025

    Senior blockchain engineer, Diamante

    Built Go storage modules for a Stellar-fork Layer 1 ledger, keeping state persistence replay-safe under consensus finality and validator interaction.

    Go · PostgreSQL · CouchDB

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  4. 2023 – 25

    Blockchain developer, Liminal Custody

    Institutional custody on MPC and HSM wallets. Built a Go engine that simulates every client transfer on an EVM state snapshot before it is signed, cutting on-chain failures by 45%. Moved multisig approvals off Safe’s APIs to run on Ethereum, Polygon and BSC, and took a transaction-history API from 6–7 seconds to under 300 ms.

    Go · MPC/HSM · Safe · Redis · Kubernetes

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  5. 2022 – 23

    Founding engineer, Hashmail

    Took a decentralised messaging product from idea to 500+ beta users, with cryptographic proof that each message is authentic. Wrote its contract-event indexer for 10k+ transactions a day, and audited ERC-20, 721 and 4626 contracts that cost 35% less gas than the OpenZeppelin baseline.

    Solidity · Node.js · MySQL · IPFS

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PROJECTS

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  1. 2026

    Dynamic graph rewiring in DEX networks

    A peer-reviewed study of MEV and liquidity fragmentation across decentralised exchange networks, presented at the Nanyang Blockchain Conference 2026 at NTU Singapore.

    Python · network analysis · MEV

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  2. Devcon 2024

    Arcus, a term-rate order book

    A central limit order book that trades yield, not price. A Rust matching engine with one book per maturity on 1bp rate ticks, atomic roll orders priced off the implied forward rate, batch clearing against sandwich attacks, and a write-ahead log that replays to an identical state hash.

    Rust · tokio · proptest · Solidity on Arbitrum

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  3. Dec 2023

    EthIndia 2023, Safe track winner

    Won the Safe track at EthIndia with a cross-chain DeFi lending prototype built over a weekend. One of three hackathon track wins.

    Safe · Chainlink CCIP · Solidity

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SEE ALSO

AUTHOR

Nitish Kumar · B.E. Information Science, NITTE Meenakshi Institute of Technology