Software Developer (Kotlin/Java), Payment Platform

About the role

🌍 Remote | UTC+8 | Core collaboration hours: 1:00–7:00 PM Manila Time

Salmon is a technology-driven financial company building a banking and lending platform across Southeast Asia, starting in the Philippines. We combine global fintech expertise with deep local market knowledge to make financial services simple, accessible, and useful for millions of people across the region.

7M+ app downloads. 2M+ monthly active users. 7,000+ partner stores. US$310M+ raised from leading global investors.

Manila-based, globally distributed, and hybrid-first — our team spans 45+ countries.

If you want to solve complex problems at scale and impact how millions of people access and manage money, come build with us. Southeast Asia's fintech moment starts here.

What’s special about our payment platform:

- Built for resilience: a fault-tolerant platform where payments keep flowing even when parts of the system or external partners fail

- Integrations: international partners and domestic Philippine payment rails

- Money-movement flows: cash-in, cash-out, bill payments, loan disbursement and repayment, and more

- Platform approach: one platform serving multiple internal products and teams, with shared APIs, SDKs, and reusable building blocks

- Architecture: Kotlin/Spring Boot microservices, Kafka, relational databases, and durable workflow orchestration for long-running payment processes

- Reliability by design: idempotency, retries and timeouts toward unreliable external partners, full audit trail

- Compliance: regulated environment (BSP), with security and fraud checks built into the flow

What you’ll do:

- Develop scalable microservices on the JVM with Spring Boot, as part of a team building platform solutions for our banking product.

- Design payment services with a focus on DDD, eventual consistency, and resilience to partner and infrastructure failures.

- Work with product, QA, security, and operations to release changes under agreed engineering standards.

What you’ll own:

- Own the design, build, and maintenance of software components supporting the Core Engineering team.

- Design and evolve payment flows end to end: processing, routing, status handling, refunds/reversals.

- Integrate new payment providers, banks, and partner channels, and handle their failure modes gracefully.

- Build and maintain scalable, reliable APIs and services, and contribute to internal SDKs and frameworks that let product teams launch new payment use cases quickly and safely.

- Investigate payment incidents (stuck, duplicated, or inconsistent transactions) and make the system self-healing.

- Translate functional requirements into technical solutions and maintainable implementations.

- Contribute to code and configuration reviews.

What makes you a strong fit: