Senior Backend Engineer, Stablecoin Platform (Web3)

Location: Singapore

Company

Airwallex provides financial infrastructure for global payments, foreign exchange, liquidity, and financial products.

What you will do

• Build stablecoin infrastructure for buying, holding, sending, and settling tokenised currency.
• Design secure systems for key management, transaction signing, gas fee management, and blockchain integration.
• Own the full lifecycle of stablecoin transactions, including minting, burning, transfers, and reconciliation.
• Build internal ledgering systems that track balances across multiple chains and token types.
• Integrate stablecoin services with FX and payment systems to support conversion between supported currencies and stablecoins.
• Write and review production code while collaborating with product, infrastructure, and compliance teams.

Requirements

• 5+ years of engineering experience with object-oriented design and production-grade software development.
• Experience with at least one strongly typed language such as Kotlin, Java, C#, C++, or Rust.
• Experience building and integrating blockchain infrastructure, including wallets, transaction flows, and key management.
• Strong understanding of secure system design, private key handling, signing, encryption, and operational controls.
• Experience integrating new systems into legacy or distributed environments without instability or regressions.
• Clear communication skills and the ability to collaborate across engineering, product, and non-technical teams.

Nice to have

• Experience with Python.
• Experience in FX, payments, or financial infrastructure.

Culture & Benefits

• Work on core financial infrastructure used by businesses globally.
• Collaborate with engineering, product, infrastructure, and compliance functions.
• Join a distributed organization operating across 27 offices.