Software Developer (Kotlin/Java), Payment Platform

Salmon Group; Union (NJ); À distance; USD 90 000 - 120 000; Plein temps

Avantages offerts par ce poste

Company-provided tools

Medical insurance support

Mental health support

Vacation days

Remote work

Résumé du poste

Salmon is seeking a Software Developer (Kotlin/Java) to join our Payments Platform team in a fully remote role. You will build scalable JVM microservices with Spring Boot and durable workflows to support fast-moving financial services.

You’ll own payment flows end to end, integrate new providers, and collaborate with product, QA, security, and operations to release changes under shared standards.

Qualifications

• 3+ years of software development on the JVM with Kotlin as an advantage.
• Experience with Spring Boot in a microservice environment.
• Experience with domain-driven design and eventual consistency.
• Experience with payments, banking, or transactional/financial systems.
• Understanding of idempotency, retries, and timeouts in money flows.
• Agile work style with CI/CD and deployment practices.
• Experience with containers and orchestration (Docker, Kubernetes; AWS preferred).
• Interest in knowledge sharing within the team.

Responsabilités

• Develop scalable JVM microservices with Spring Boot as part of the Banking product team.
• Design payment services with an emphasis on DDD, eventual consistency, and resilience.
• Collaborate with product, QA, security, and operations to release changes.
• Own the design, build, and maintenance of software components for Core Engineering.
• Design and evolve payment flows end-to-end and integrate new providers.

Connaissances

Kotlin

Java

Spring Boot

Microservices

DDD

Eventual consistency

Agile

CI/CD

Cloud computing

Outils

Docker

Kubernetes

Kafka

AWS

Description du poste

Work on financial products that change the market

Software Developer (Kotlin/Java), Payment Platform

Location

European Union

Employment Type

Full time

Location Type

Remote

Department

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

Medical insurance support for you and your family through co-funding or reimbursement, depending on your location and subject to policy limits

Access to an internal mental health support specialist

22 vacation days, Philippine public holidays, and 15 sick days

Growth and team experience

Opportunities to learn and share your expertise through internal expert meetups, external conferences, speaking opportunities, and industry publications

Company-sponsored trips to Manila to meet and work with your team in person

High-performing teams can earn a dedicated beach house week in Southeast Asia

We believe strong teams are built by people with different backgrounds, experiences, and points of view. Salmon is an equal opportunity employer, and we make hiring decisions based on skills, experience, and potential.