Looking for a job

Hardil Singh

@hardilsingh

Lead engineer, 8+ years. I build payment and custody systems in TypeScript, Node.js and Go, with React and React Native on the front.

India

Message

What I'm looking for

A senior or lead remote role on a fintech, Web3 or AI product, full-time or contract, working on payment, custody or backend systems where reliability matters. I’m based in Mohali, India and can start right away.

I’ve spent 8+ years building software, 7+ of them in blockchain, mostly in TypeScript and Node.js with React on the front. At BitDecentro I built the payment engine behind Bitopayments (bitopayments.com), a crypto gateway live on six networks that credits each transfer exactly once and reverses it if a reorg drops it. I also designed our MPC custody platform, and built Sana, an AI agent on the Claude API that runs 350+ typed actions inside an HR SaaS. Before that I spent five years at Antier Solutions, where I worked on TOMI Wallet (50,000+ downloads) and Doma, a gold and silver platform for a client, on assignment in Abu Dhabi. I also run Posthaste (posthastemail.dev), my own transactional email service. I use Claude Code daily, while architecture, review and tests stay with me.

Experience

Work history, roles, and key accomplishments

Current

Founder (own product)

Current

Posthaste

Aug 2026 - Present (3 months)

My own transactional email service, built alone: inbound and outbound mail servers, a 115-endpoint REST API (OpenAPI 3.1), a Next.js dashboard and a React Native app. Per-domain DKIM, bounce handling and DMARC report ingestion. Load-tested production with nearly 1 million messages, none lost or duplicated.

Current

Lead Engineer

Current

BitDecentro

Jul 2026 - Present (4 months)

Built the payment engine for Bitopayments (bitopayments.com), a crypto gateway started with a partner, live on six networks: exactly-once crediting, reorg reversal, signed webhooks. Designed the MPC custody platform (Go threshold signing). Built Sana, a Claude API agent running 350+ typed actions in DecentroHR. Built margin and liquidation for Palladium, a client's trading platform.

Software Engineer

Antier Solutions

Jun 2021 - Jun 2026 (5 years)

Built TOMI Wallet in React Native, a crypto wallet for Ethereum, Polygon and BNB Chain with 50,000+ Google Play downloads. Built Doma (doma.io) for the client mTransform, where customers buy physical gold and silver with settlement on a blockchain, on assignment in Abu Dhabi. Moved the team to TypeScript and NestJS, ran 30+ technical interviews and mentored engineers.

Full-Stack Developer

Freelance

Feb 2018 - Jun 2021 (3 years 4 months)

Built CRM web and mobile apps with real-time updates over WebSockets for international clients, and an NFT marketplace on Ethereum with minting, listing and multi-chain wallet support.