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Protocol & backend engineer · DeFi

Nitish Kumar

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.

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Experience

Click any description and change a word. Every later entry breaks.

  1. #42026 – 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
    pendingprevhash
  2. #32025 – 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
    pendingprevhash
  3. #22025

    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
    pendingprevhash
  4. #12023 – 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
    pendingprevhash
  5. #02022 – 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
    pendingprevhash

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Projects

Chained the same way: edit a summary to break the entries above it.

  1. #22026

    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
    pendingprevhash
  2. #1Devcon 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
    pendingprevhash
  3. #0Dec 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
    pendingprevhash

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Profiles

ChannelAddress
GitHubgithub.com/technitish9123
LinkedInlinkedin.com/in/tecnicalnitish
Xx.com/Nekotish
CVnitishkumar.pages.dev/cv