Senior Software Engineer - Blockchain & DeFi

Role Purpose :

The Senior Software Engineer will be a hands-on engineer within Wio's digital asset engineering team, building and shipping the services that power our blockchain and DeFi products - smart contracts, wallet and transaction services, on-chain/off-chain integrations, and the backend platforms that connect Web3 capabilities to a regulated banking core.

Key Responsibilities :

- Develop and maintain production-grade smart contracts and protocol integrations (EVM/Solidity), including testing, deployment, and upgrade workflows.

- Build backend services and APIs (microservices, event-driven architecture) connecting on-chain activity with the bank's core platforms, ledgers, and compliance systems.

- Implement wallet and transaction-orchestration features - signing flows, nonce and gas management, chain indexing, and reconciliation of on-chain data.

- Integrate with DeFi protocols, oracles, and bridges safely, with robust failure handling and monitoring.

- Write clean, well-tested code - unit, integration, and contract testing (Foundry/Hardhat) - and contribute to CI/CD pipelines and observability.

- Participate in design reviews and technical discussions, contributing to architecture decisions within your squad.

- Work closely with Security, Risk, and Compliance to ensure everything shipped meets the bar of a regulated bank.

- Support production systems : participate in on-call rotations, debug incidents, and contribute to root-cause analysis and fixes.

- Collaborate with product managers and designers to translate requirements into reliable, scalable solutions.

- Keep current with the Web3 ecosystem - new standards, tooling, and best practices - and share learnings with the team.

Required Experience & Skills :

- 5+ years of software engineering experience, with 1 - 2+ years building blockchain, Web3, or DeFi systems (production experience preferred).

- Hands-on smart contract development experience (Solidity/EVM) and familiarity with modern tooling (Foundry, Hardhat).

- Strong backend skills in at least one of : TypeScript/Node.js, Go, Rust, Java/Kotlin, or Python - with solid grounding in distributed systems fundamentals.

- Understanding of wallet infrastructure, transaction signing, and chain indexing; exposure to key management (MPC/HSM/multisig) a plus.

- Working knowledge of DeFi primitives - AMMs, lending, staking, stablecoins, oracles - and their integration considerations.

- Experience with cloud platforms (AWS or Azure), containers/Kubernetes, and CI/CD pipelines.

- Security-conscious engineering habits : secure coding, thorough testing, and audit-ready contract development.

- Strong ownership and delivery track record as a senior individual contributor within a squad.

- Good communication skills; comfortable collaborating across engineering, product, and control functions.

Preferred Qualifications :

- Experience in a crypto exchange, Web3 protocol team, or blockchain-focused startup environment.

- Contributions to open-source Web3 projects, hackathons, or personal on-chain projects.

- Prior experience in fintech or regulated financial services.

- Familiarity with account abstraction (ERC-4337), L2s/rollups, or cross-chain messaging.

What We Offer :

- The opportunity to build a regulated bank's digital asset platform from the ground up, with real production scale.

- A high-ownership, fast-moving environment with direct exposure to senior leadership.

- Competitive compensation and benefits aligned to the Gurgaon market.

Wio Bank is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Skills

Blockchain, DeFi Protocols, Blockchain Implementation, Solidity, Smart Contract, Golang, Rust, Python, Distributed Systems, API, Web3.js