Senior Backend Engineer

Position:
Senior Backend Engineer, Stablecoin Platform

Company:
Airwallex

Location:
Singapore

Employment type:
Full time

Work Arrangement:
On-site

Short Summary:
Airwallex is a unified payments and financial platform for global businesses, empowering over 250,000 businesses worldwide. The Financial Markets team is expanding to build stablecoin infrastructure for global payments and digital asset management.

Responsibilities:
- Be part of a high-impact engineering team building stablecoin infrastructure from the ground up.
- Design and implement secure systems for key management, transaction signing, gas fee management, and blockchain integration.
- Own services that manage the full lifecycle of stablecoin transactions: mint, burn, transfer, reconciliation.
- Build internal ledgering systems that track balances across multiple chains and token types.
- Integrate stablecoin infrastructure into Airwallex’s existing FX and payment systems, enabling seamless conversion between any supported currency and stablecoins.
- Write, review, and ship production code.
- Collaborate with product, infrastructure, and compliance teams to deliver reliable and auditable services.

Requirement:
- A highly experienced engineer (5+ years) with deep expertise in object-oriented design and production-grade software development, including at least one strongly typed language (e.g. Kotlin, Java, C#, C++, Rust); Python experience is useful but not sufficient on its own.
- Proven experience building and integrating blockchain infrastructure (wallets, transaction flows, key management, etc.) into larger financial systems.
- Experienced in integrating new systems into legacy or distributed environments without introducing instability or regressions.
- Strong grasp of secure system design, particularly around private key handling, signing, encryption, and operational controls.
- Able to quickly pick up unfamiliar tools or frameworks when needed and adjust to changing technical priorities.
- Clear communicator who works well across engineering, product, and non-technical teams.

Benefits:
- Airwallex is proud to be an equal opportunity employer, valuing diversity and considering all applicants based on merit, qualifications, competence, and talent.