Senior Software Engineer
First seen by Alion on Sep 21, 2026.
About the Role :
We are looking for a Senior Software Engineer with hands-on Blockchain, Web3 and DeFi development experience to build and ship production-grade digital asset and DeFi systems.
You will work on Smart Contracts, Blockchain integrations, Wallet and Transaction services and Backend platforms, connecting Web3 capabilities with a regulated banking environment.
Key Responsibilities :
- Develop and maintain production-grade Smart Contracts using Solidity/EVM.
- Build backend services and APIs connecting Blockchain/on-chain activity with core banking and other systems.
- Build wallet and transaction features including transaction signing, nonce/gas management, chain indexing and reconciliation.
- Integrate with DeFi protocols, Oracles and Bridges.
- Write clean, scalable and well-tested code with unit, integration and smart-contract testing.
- Work with Foundry/Hardhat, CI/CD and observability tools.
- Participate in architecture and technical design discussions.
- Work closely with Security, Risk, Compliance and Product teams.
- Support production systems, troubleshoot incidents and perform root-cause analysis.
- Stay updated with new Web3 standards, protocols and development practices.
Must Have :
- 5+ years of Software Engineering experience.
- 1 - 2+ years of hands-on Blockchain / Web3 / DeFi development experience.
- Strong hands-on Solidity and EVM Smart Contract Development experience.
- Experience with Foundry and/or Hardhat.
- Strong backend development experience in at least one of : TypeScript/Node.js, Go, Rust, Java/Kotlin or Python.
- Strong understanding of Distributed Systems.
- Understanding of Wallet Infrastructure, Transaction Signing and Blockchain/Chain Indexing.
- Working knowledge of DeFi concepts such as AMMs, Lending, Staking, Stablecoins and Oracles.
- Experience with AWS/Azure, Kubernetes/Containers and CI/CD.
- Strong focus on secure coding, testing, reliability and production-quality engineering.
Skills
Solidity, Blockchain, TypeScript, Node.js, Rust, Distributed Systems, Golang, DeFi Protocols, Python, Azure Foundry