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Scalable Capital, a leading European fintech platform with over €30 billion in assets under management and 1M+ clients, is seeking a Senior Kotlin/Java Software Engineer to build and evolve business-critical payment services.
In this role, you will design and develop payment services across the full lifecycle—initiation, validation, execution, status handling, returns, exception management, and reconciliation—using Kotlin, Java, and Spring Boot. You'll create clear domain models, APIs, and event-driven workflows that connect customer-facing products with internal systems and external banking partners. Your work will enable customers to move money reliably through SEPA while supporting the wider banking platform.
You will write clean, secure, well-tested, and maintainable code with particular attention to correctness, resilience, and traceability in financial transactions. You'll develop and operate cloud-native applications on AWS, including containerized services on ECS and event-driven workloads on Lambda. You'll shape reliable delivery and operations through infrastructure as code, CI/CD pipelines, observability, and monitoring.
Working in autonomous, cross-functional teams using agile practices and Domain-Driven Design, you'll take ownership from idea to production, delivering measurable value while improving quality, automation, reliability, and developer experience. The company offers international relocation support, flexible work arrangements including the opportunity to work from abroad, German language classes, education budgets, and an attractive compensation package including company pension scheme and complimentary PRIME+ Broker subscription.
REQUIREMENTS:
- Strong experience building backend services with Kotlin or Java and Spring Boot
- Solid understanding of Domain-Driven Design and ability to translate complex business processes into clear software models
- Experience designing and operating distributed, event-driven systems and APIs
- Familiarity with cloud-native development on AWS, especially containerized and serverless workloads
- Confidence with automated testing, CI/CD, infrastructure as code, and production observability
- Quality and security mindset with attention to reliability, maintainability, and operational ownership
- Clear communication skills and collaborative, pragmatic approach to problem-solving
- Interest in complex financial workflows or curiosity to learn them quickly; exposure to SEPA payments or payment processing is a plus
- University degree in relevant field (computer science, engineering, sciences, etc.) or comparable qualification
