(Senior) Software Engineer, Backend - Stablecoin (Relocate to Singapore)

Airwallex; Singapore; On-site; SGD 80,000 - 120,000; Full time

Job summary

A leading financial technology firm in Singapore is looking for a skilled developer to build stablecoin infrastructure. Candidates should have over 8 years of experience in software development and be proficient in object-oriented design and blockchain integration. This role offers the chance to collaborate with talented teams and contribute to innovative financial services. Join a company shaping the future of finance with competitive growth opportunities.

Benefits

Professional development opportunities

Collaborative team environment

Impactful work in finance

Qualifications

• 8+ years of experience in software development.
• Proven experience with blockchain infrastructure.
• Strong grasp of secure system design.

Responsibilities

• Build stablecoin infrastructure from the ground up.
• Design secure systems for transaction signing and key management.
• Integrate stablecoins into existing FX and payment systems.

Skills

Object-oriented design

Production-grade software development

Blockchain integration

Secure system design

Communication across teams

Tools

Kotlin

Java

C#

C++

Rust

Job description

About Airwallex

Airwallex is the leading financial technology platform for modern businesses growing beyond borders. With one of the world’s most powerful payments and banking infrastructure, our technology empowers businesses of all sizes to accept payments, move money globally, and simplify their financial operations, all in one single platform. Established in 2015 in Melbourne, our purpose is to connect entrepreneurs, business builders, makers and creators with opportunities in every corner of the world. Today, Airwallex has a global footprint across Asia-Pacific, Europe, and North America.

The Opportunity: Join Our Stablecoin Platform Team

The Financial Markets team is responsible for Airwallex’s core FX and liquidity infrastructure. We’re now expanding into building the stablecoin infrastructure that will enable both customers and internal systems to buy, hold, send, and settle with tokenised currency globally. This includes support for near-instant global payments, on-chain liquidity, and seamless conversion between fiat and stablecoin balances. We’re building stablecoins into the core of Airwallex’s infrastructure, so they function as seamlessly as any fiat currency across our global platform.

We're seeking a skilled developer to take a leading role in advancing our initiatives. Someone who can both architect and build robust, reliable systems and tackle the challenges of blockchain integration, digital asset custody, and global payments infrastructure.

What You’ll Do

• 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

Who You Are

• A highly experienced engineer (8+ 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
• Bonus: experience in FX, payments, or financial infrastructure is useful but not required

Why Join Us

• Be Part of Something Big: Join a team that's redefining the future of finance. Contribute directly to the core engine of user growth in a company that is reshaping global financial services.
• Grow With Us: At Airwallex, we're committed to your professional development. You'll have opportunities to learn, grow, and shape your career path in a fast-paced, innovative environment.
• Collaborate With the Best: Work with a team of talented and passionate individuals who are driven by the desire to create something extraordinary.

Equal opportunity

Airwallex is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Airwallex is considered based on merit, qualifications, competence and talent. We don’t regard color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status when making our hiring decisions. If you have a disability or special need that requires accommodation, please let us know.