Backend Engineer — Crypto Infrastructure & Traditional Payments

Liquid staking  ·  Card & settlement rails  ·  Cross-border payments  ·  DeFi vaults

Backend engineer specializing in the intersection of crypto infrastructure and traditional payments — systems where on-chain state must reconcile with real-world money movement to the cent.

My work spans both sides of that seam: founding-team engineer at a liquid-staking protocol that scaled past $500M+ in staked assets, four years on cross-border payments and the stablecoin initiative at Visa, and now card and vault products at ether.fi — a non-custodial Visa crypto card built on liquid-restaking infrastructure.

• Currently: Senior Backend Engineer at ether.fi — Cash (card) & Vault products
• Core stack: Go, Rust, Solidity, TypeScript, Java/Spring, Ethereum/EVM, EigenLayer, Kafka, PostgreSQL, Redis
• Education: B.Tech, Computer Science — Delhi College of Engineering (now Delhi Technological University)
• Focus areas: liquid staking & restaking, card settlement, cross-border payments, stablecoins, smart-contract gas optimization

2026 – Present

Building ether.fi Cash, a non-custodial Visa crypto card on liquid-restaking infrastructure where users spend ETH/USDC while their assets continue earning restaking yield.

• Own real-time settlement bridging Visa rails and on-chain vaults (authorization, capture, reconciliation).
• Built the Borrow Mode backend — USDC borrowing against eETH collateral via lending-pool integration.
• Designed an event-driven cashback pipeline (wETH rewards) on Kafka.
• Hardened KYC/AML and risk monitoring with chain-analytics providers; extended multi-chain support across Ethereum L1 and L2s.

Go · Solidity · Ethereum · EigenLayer · Kafka · PostgreSQL · Redis

2022 – 2026

Worked across traditional cross-border payments and Visa's stablecoin / crypto initiative — the bridge between card networks and digital assets.

• Led an 8-engineer team on a real-time payments platform (monolith plus eight microservices) sustaining 2,000+ TPS at 99.98% uptime.
• Delivered Treasury as a Service for the APAC hub — 15 currencies, clients in 60+ countries, powering roughly 80% of APAC liquidity flows through Visa Direct A2A.
• Built the Network Validations Framework — configurable payer/beneficiary identity checks across 100+ SWIFT message types.
• Prototyped on-chain payment settlement in Solidity and Solana as part of the crypto/stablecoin track.

Java · Spring Boot · Solidity · Rust · RabbitMQ · Hazelcast · Docker · Kubernetes

2021 – 2022

Joined as an intern during the final years of my degree at Delhi College of Engineering and grew into a founding member of a ~7-person team building a multi-chain liquid-staking protocol.

• Built Rust / CosmWasm smart contracts powering liquidity pools that scaled past $500M+ in staked assets across multiple chains.
• Led gas-fee analysis and optimization — benchmarking storage and swap costs on Terra/CosmWasm to keep contract execution economical at scale.
• Built a validator analytics platform monitoring 1M+ nodes (React, MongoDB, Ethereum APIs) and APR dashboards.
• Designed cross-chain architecture and on-chain/off-chain synchronization pipelines.

Rust · CosmWasm · TypeScript · Python · React · MongoDB

Languages

Blockchain & Web3

Backend & Infrastructure

Achieved Codeforces Expert during university (pre-2022, before AI coding assistants) — a credential earned through unassisted algorithmic problem-solving under contest conditions.

• Codeforces — Expert · pjdurden
• CodeChef — peak rating 1890 · pjdurden
• LeetCode — peak rating 1679 · Pjdope
• Code-A-Thon — Rank 5 (College Rank 1)
• Cleared the Facebook Hacker Cup Qualification Round (2020); Google Kick Start Round B (2021).
• Mentored 300+ students in algorithms and software engineering through GirlScript.