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Airwallex

Senior Fullstack Engineer, Scale

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In-Office
London, England, GBR
Senior level
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London, England, GBR
Senior level

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About Airwallex

Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 676,000 businesses, including McLaren Racing, Qantas, SHEIN, and TikTok, use us, directly or through our platform partners, to run their financial operations or build and monetize financial products of their own.

We started in Melbourne in 2015 to build the infrastructure global commerce runs on. We're the regulated backbone behind global payments: not by accident, but by design. A decade plus, 85+ licenses, and a financial infrastructure spanning North America, Europe, the Middle East, and Asia-Pacific.

We're co-headquartered in San Francisco and Singapore, with more than 2,300 people across 27 offices. We hire builders with founder-level energy, people who move fast with good judgment, dig in with real curiosity, and make calls from first principles rather than waiting to be told what to do. Read our operating principles to see it in full.

 

Hiring Location: London (Hybrid Mode)

Total Compensation: 140,000 to 200,000 GBP

 

About the Team

  • Embedded Finance Platform: Build and maintain the multi-tenant infrastructure powering companies like Rippling, Navan, Qantas, and SHEIN. You'll architect systems that aggregate requests from all platform customers, meeting enterprise-grade SLAs for availability, latency, and throughput while handling cross-data-center scenarios.

  • Cross-Domain Product Features: Own features that require synthesizing knowledge across business, regulatory, and technical domains—areas where no single existing team has full coverage, like tax systems, compliance-driven flows, or monetization tools.

  • Solutions Architecture: Design integrations for enterprise prospects by translating their business requirements into technical solutions. Your architectural decisions directly influence deal outcomes—from enabling multi-million dollar contracts to differentiating in competitive sales.

     

What you'll do

  • Build Something That Matters: Your work directly impacts how millions of people use financial services. Companies like Rippling and SHEIN rely on infrastructure you'll build. You're not just writing code—you're shaping how businesses embed finance.

  • Grow Beyond Engineering: You'll develop expertise that extends beyond technical skills: understanding customer business models, navigating regulatory landscapes, influencing enterprise sales. This is career growth that prepares you for technical leadership, product roles, or even founding your own company.

  • Join a World-Class Team: Work with exceptional engineers, product thinkers, and designers across the globe. At Airwallex, you'll be challenged, supported, and surrounded by people who are building something meaningful together.

 

Minimum Qualifications

  • Have 5+ years of software engineering experience in ReactJS & TypeScript

  • Excel at making the right level of abstraction—balancing flexibility and simplicity in system/component design

  • Demonstrate clean communication across technical and non-technical stakeholders

  • Make pragmatic decisions on when to optimize for performance vs. velocity based on business impact

  • Thrive in cross-functional environments spanning Product, Design, Compliance, and Sales

  • Design for scale, maintainability, and production excellence

 

Preferred qualifications:

  • Fintech, payments, or regulated industry experience

  • High-scale performance tuning (100k+ QPS, large user bases, strict latency SLAs)

  • Multi-tenant SaaS or platform architecture background

  • Proficiency with PostgreSQL, Redis, Kafka, or cloud platforms (AWS/GCP/Azure)

  • Experience with OAuth2.0, API design, or developer documentation

  • Cross-region deployment or data residency compliance experience

  • Solutions engineering or customer-facing technical experience

     

Compensation Range: £74,822 - £138,955 + bonus + RSU

Applicant Safety Policy: Fraud and Third-Party Recruiters

To protect you from recruitment scams, please be aware that Airwallex will not ask for bank details, sensitive ID numbers (i.e. passport), or any form of payment during the application or interview process. All official communication will come from an @airwallex.com email address. Please apply only through careers.airwallex.com or our official LinkedIn page.

Airwallex does not accept unsolicited resumes from search firms/recruiters. Airwallex will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to specific open position(s). Search firms/recruiters submitting resumes to Airwallex on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary.

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.

Airwallex London, England Office

Airwallex London, UK Office

Labs House, 15-19 Bloomsbury Way, London, United Kingdom, WC1A 2TH

Sales

Our London office is scaling fast. We're a 140+ strong team and growing, and our Sales team is right at the heart of it. The momentum is real: we're investing over $1bn into the region and $590m into the UK. Revenue is up 116% year on year and volumes have surged 226%, and we’ve only captured a fraction of what’s possible. That's where you come in. You'll be selling a world-class proven product into a market that's still wide open. Global heavyweights like McLaren Racing, Arsenal, Bolt, Qantas, and Carwow already run on Airwallex. For you, that means real ownership from the start, a role you'll scale, and scope that grows as fast as you can sell. It's a rare moment to join: proven product, open market, and a team going places

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

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