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# (Senior) Kotlin / Java Software Engineer - Banking Payments

- **Company:** Scalable GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Automation of Tests, Cloud Computing, Code Review, Continuous Delivery, Continuous Integration, Payment Systems, Payment Service Provider, Spring Cloud, Spring-boot, Backend, Kotlin, Event Driven Architecture, Infrastructure Automation Frameworks, Information Technology, Domain Driven Design, Serverless Computing
- **Published:** October 22, 2026
- **Apply:** https://startup.jobs/senior-kotlin-java-software-engineer-banking-payments-m-f-x-scalable-gmbh-10535966

## About the Role

* 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.

## Description

* 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.