Senior Software Engineer - Cards API team

Seoulstart; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Seoulstart is seeking an experienced software engineer to help build a high-volume card issuance platform. You will drive card issuance features, partner with PMs and analysts to shape the roadmap, and own end-to-end delivery from design through measurement.

The role emphasizes designing microservices and event-driven APIs for global fintech partners, ensuring availability, reliability, and security while collaborating across teams to deliver customer-focused solutions.

Qualifications

• Build microservices and event-driven architectures.
• Write maintainable, well-tested code with observability.
• Connect engineering decisions to customer outcomes.
• Design partner-friendly APIs that are well documented.
• Own end-to-end projects from problem definition through rollout.
• Ensure system availability, reliability and security.
• Work independently and collaboratively across functions.
• Translate complex technical concepts clearly for diverse audiences.

Responsibilities

• Drive card issuance features solving partner challenges.
• Partner with PMs and analysts to shape product roadmap and implementation decisions.
• Own card management features end-to-end from design through delivery and measurement.
• Design resilient microservices and event-driven APIs for global fintech partners.
• Maintain system availability, reliability, and security for high-volume card issuance platform.

Skills

Microservices

Event-driven design

Relational databases

System reliability

Observability

Product mindset

End-to-end ownership

Tools

Java

Spring Boot

Kafka

Job description

What you'd do:

• Drive card issuance features solving partner challenges: onboarding, liquidity, fraud, analytics.
• Partner with PMs and analysts to shape product roadmap and implementation decisions.
• Own card management features end-to-end from design through delivery and measurement.
• Design resilient microservices and event-driven APIs for global fintech partners.
• Maintain system availability, reliability, and security for high-volume card issuance platform.

What they want:

• Build microservices, event-driven architectures, relational databases, and resilient scalable systems.
• Write maintainable, well-tested code with strong observability and proactive debt management.
• Connect engineering decisions to customer outcomes with strong product mindset.
• Design partner-friendly APIs that are simple to consume and well-documented.
• Own end-to-end projects from problem definition through rollout and roadmap planning.
• Ensure system availability, reliability, and security; accountable for team's systems.
• Work independently and collaboratively across functions to reach practical solutions.
• Translate complex technical concepts clearly for diverse audiences and stakeholders.

Nice to have:

• Experience with Java, Spring Boot, and Kafka for distributed systems.
• Background building or operating finance APIs at scale.
• Domain expertise in card payments (issuer or acquirer perspective). Build microservices, event-driven architectures, relational databases, and resilient scalable systems.
• Write maintainable, well-tested code with strong observability and proactive debt management.
• Connect engineering decisions to customer outcomes with strong product mindset.
• Design partner-friendly APIs that are simple to consume and well-documented.
• Own end-to-end projects from problem definition through rollout and roadmap planning.
• Ensure system availability, reliability, and security; accountable for team's systems.
• Work independently and collaboratively across functions to reach practical solutions.
• Translate complex technical concepts clearly for diverse audiences and stakeholders.