(Senior) Kotlin / Java Software Engineer - Banking Payments (m/f/x)
Posted Updated
Summary
Backend engineer at Scalable Capital building business-critical SEPA payment services in Kotlin/Java with Spring Boot on AWS (ECS, Lambda), covering the full payment lifecycle — initiation, execution, returns, reconciliation — using event-driven systems, DDD, and CI/CD, on-site in Berlin.
- Build and evolve business-critical payment services using Kotlin, Java and Spring Boot, enabling customers to move money reliably through SEPA while supporting the wider banking platform.
- Develop services across the payment lifecycle, including initiation, validation, execution, status handling, returns, exception management and reconciliation.
- Design clear domain models, APIs and event-driven workflows connecting customer-facing products with internal systems and external banking partners.
- Write clean, secure, well-tested and maintainable code, with particular attention to correctness, resilience and traceability when moving money.
- Develop and operate cloud-native applications on AWS, including containerised services on ECS and event-driven workloads on Lambda.
- Shape reliable delivery and operations with infrastructure as code, CI/CD pipelines, observability and monitoring.
- Work in autonomous, cross-functional teams using agile practices, Domain-Driven Design, code reviews, automated testing and continuous delivery.
- Take ownership from idea to production, delivering measurable value while improving quality, automation, reliability and developer experience.
- Strong experience building backend services with Kotlin or Java and Spring Boot.
- A solid understanding of Domain-Driven Design and the 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 containerised and serverless workloads.
- Confidence with automated testing, CI/CD, infrastructure as code and production observability.
- A quality and security mindset, with attention to reliability, maintainability and operational ownership.
- Clear communication skills and a collaborative, pragmatic approach to solving problems.
- An interest in complex financial workflows or the curiosity to learn them quickly. Exposure to SEPA payments or payment processing would be a plus.
- A university degree in a relevant field of study (e.g. computer science, engineering, sciences, ...) or a comparable qualification.
- Be part of one of the fastest-growing and most visible Fintech startups in Europe, creating innovative services that have a substantial impact on the lives of our customers
- Work with an international, diverse, inclusive, and ever-growing team that loves creating the best products for our clients
- Be productive with the latest hardware and tools
- Learn and grow by joining our in-house knowledge sharing or career development sessions and spending your individual Education Budget
- Learn and experience German culture first hand by joining our free German language classes
- International relocation support is provided if required
- Opportunity to work from abroad
- Benefit from an attractive compensation package and from the company pension scheme
- Monthly contribution of 50% for the ‘Deutschland Jobticket’
- Say goodbye to order commissions and say hello to your complimentary subscription of Scalable Capital's PRIME+ Broker
- Enjoy flexible and discounted sports activities with Urban Sports Club