Senior Backend Engineer, Spend Team (Cards)
Airwallex1 months ago
Location
SG - Singapore
Type
Full Time
Level
Senior
Role
Backend Engineer
Posted
Jan 16, 2026
Full TimeSenior
The role
Summary
Senior Backend Engineer role at Airwallex's Cards team in Singapore, focused on building scalable systems for card issuance and expense management. Requires 5+ years of backend development experience with expertise in distributed systems, cloud infrastructure, and modern programming languages like Java, Kotlin, Go, or Python.
What you'll do
Backend System Design: Design and implement scalable, secure backend services that power the Cards product
Technical Architecture: Contribute to the architecture and long-term technical vision of backend systems
Feature Delivery: Own end-to-end delivery of new features and improvements from design to production
Code Quality: Write high-quality, testable code with attention to reliability and maintainability
Engineering Best Practices: Promote and uphold engineering best practices, including observability and API design
Cross-functional Collaboration: Collaborate with cross-functional teams including product, infrastructure, and design
Technical Mentorship: Provide technical mentorship and support the growth of other engineers on the team
What we look for
Technical
Backend Development ExperienceHands-on experience designing and building backend systems and APIs in production
Computer Science FundamentalsStrong understanding of algorithms, data structures, and distributed systems
Programming Language ProficiencyProficient in at least one backend language (Java, Kotlin, Go, Python)
API DesignSolid understanding of REST API design and backend frameworks like Spring Boot
Cloud InfrastructureExperience working with cloud platforms (AWS, GCP) and container orchestration (Kubernetes)
Performance FocusStrong focus on performance, reliability, and code quality
Education
Bachelor's DegreeBachelor's degree in Computer Science, Software Engineering, or a related field
Experience
Professional Experience5+ years of professional software engineering experience
Skills
Required skills
Backend Programming LanguagesProficiency in Java, Kotlin, Go, or Python for backend development
Distributed SystemsStrong understanding of distributed systems architecture and design patterns
API DevelopmentExperience with REST API design and backend frameworks like Spring Boot
Cloud InfrastructureHands-on experience with AWS, GCP, and container orchestration using Kubernetes
System DesignAbility to design scalable, secure backend systems for production environments
Nice to have
Observability ToolsFamiliarity with monitoring and observability tools like Grafana, Prometheus, and Splunk
Financial TechnologyExperience with fintech products, payment systems, or card issuance platforms
Mentorship ExperiencePrevious experience mentoring junior engineers and technical leadership
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Airwallex
View all jobs
Airwallex is a Singapore-based financial technology company specializing in cross-border payments and financial services for businesses.
SingaporeFounded 2015airwallex.com
Tech Stack
Languages
JavaKotlinGoPython
Frameworks
Spring Boot
Tools
GrafanaPrometheusSplunk
Other
AWSGCPKubernetesREST APIs