Software Developer; Kotlin​/Java), Platform

Work on financial products that change the market

European Union

Full time

Remote

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:

3+ years of software development on the JVM; good knowledge of Kotlin is an advantage

Experience with Spring Boot in a microservice environment

Experience with domain-driven design and eventual consistency

Experience with payments, banking, or other transactional/financial systems (payment platforms, PSP integrations, wallets, ledgers)

Solid understanding of idempotency, distributed transactions, retries, and timeouts in money flows

Track record in an agile setup with continuous deployment and delivery

Experience with containerization and orchestration in a cloud environment (Docker and Kubernetes preferred, AWS preferred)

Experience with, and enjoyment of, continuous knowledge-sharing within the team

Nice to have:
Kafka, workflow engines, ISO 20022

What we offer:

Ownership and flexibility

Fully remote work with core collaboration hours from 1:00 to 7:00 PM Manila time (UTC+8)

Company-provided tools and equipment

Health and time off

Medi…