Software Developer (Kotlin/Java), Payment Platform

Salmon; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Tools and equipment provided

Health insurance support

Paid time off (vacation/sick)

Job summary

Salmon ищет разработчика на JVM с опытом Kotlin и Spring Boot для построения платежной платформы в Юго‑Восточной Азии, начиная с Филиппин. Глобально распределенная команда, удаленная работа с гибкими часами в Маниле.

Вы будете работать над микросервисами платежной системы, интеграциями банков и PSP, проектированием архитектуры, устойчивости и обработкой ошибок. Требуется 3+ года опыта и знание Kotlin/Spring Boot.

Qualifications

• Не менее 3 лет разработки на JVM; приветствуется Kotlin.
• Опыт работы в микросервисной архитектуре на Spring Boot.
• Опыт работы с Domain-driven design и eventual consistency.
• Опыт в платежных/финансовых системах, PSP-интеграциях или банковских системах.
• Понимание идемпотентности, распределённых транзакций, повторных попыток и таймаутов.
• Опыт работы в Agile/CI-CD среде, знания Docker и Kubernetes, AWS желателен.

Responsibilities

• Разработка масштабируемых JVM‑микросервисов на Spring Boot в команде.
• Проектирование платежных сервисов с фокусом на DDD, консистентность и устойчивость к сбоям партнёров.
• Сотрудничество с продуктом, QA, безопасностью и операциями для выпуска изменений.
• Создание и поддержка API и сервисов, участие в SDK и фреймворках для быстрых платежей.
• Анализ инцидентов с платежами и обеспечение самовосстановления системы.

Skills

JVM development

Kotlin

Domain-driven design

Eventual consistency

Payments/financial systems

Agile/CD

Docker/Kubernetes

AWS

Spring Boot

Tools

Spring Boot

Docker

Kubernetes

AWS

Job description

Описание:

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

Задачи:

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. 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

Требования:

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.

Условия:

• 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