Senior Software Engineer - Cards API team

Seoulstart; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Seoulstart is seeking a Senior Software Engineer to join the Cards API team, focusing on onboarding, liquidity, fraud, and card analytics. You will shape API design and guide the evolution of services used by Wise customers.

You will work with product managers and engineers to decide what to build, ensure high availability and security, and drive reliable releases. This role sits in a fast-paced fintech environment prioritizing scalable, well-tested systems.

Qualifications

• Build microservices and event-driven architectures with robust APIs.
• Design scalable, observable systems with tests and technical debt management.
• Bridge engineering decisions with product outcomes and API usability.

Responsibilities

• Drive Cards API features for onboarding, liquidity, fraud, and analytics.
• Collaborate with PMs, analysts, and engineers to plan and ship.
• Own availability, reliability, and security of team systems.

Skills

Java

Spring Boot

Kafka

Job description

# Senior Software Engineer - Cards API teamNew roles land in Following.Singapore, SGPosted todayfulltimeApply on Wise's career page## Market pay checkMatched to Computer systems and software professionalsSign in to see the pay range for this roleThe full range and the breakdown by years of experience, from Ministry of Employment and Labor wage data. Free, no payment.Source: Ministry of Employment and Labor wage information system (wage.go.kr), wage distribution by occupation.## What you'd do* Drive Cards API features for onboarding,liquidity,fraud,and card analytics* Collaborate with PMs,analysts,and engineers on what to build and ship* Own availability,reliability,and security of systems your team builds## What they want* Build microservices,event driven architectures,relational databases,and well designed APIs* Design resilient scalable systems with tests,observability,and proactive technical debt work* Apply product mindset tying engineering choices to partner outcomes and API usability## Nice to have* Have production experience with Java,Spring Boot,and Kafka* Have built finance APIs for partners or external developers* Know card payments as an issuer or acquirer in prior roles## Seoulstart's readWork authorization: Not stated, verify with recruiterLanguage beyond English: No language beyond English statedThis is Seoulstart's analysis of the public job description, not the employer's stated policy. Verify work-pass eligibility, language requirements, and remote allowances directly with the recruiter.