(Senior) Kotlin / Java Software Engineer - Banking Payments (m/f/x)

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.

About Scalable GmbH

• 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
• Scalable Capital is a leading digital investment and banking platform with a full banking licence, empowering people across Europe to shape their own finances.
• Scalable Broker makes it easy and affordable for clients to invest professionally in stocks, ETFs, cryptocurrencies, and derivatives, as well as set up savings plans.
• Scalable Wealth, the digital wealth management service, offers clients professional investment in ETF portfolios, and is also adopted as a white-label solution by banks and other B2B partners.
• The company’s offerings are rounded off by attractive interest rates, loans, and private equity.
• With the European Investor Exchange, Scalable Capital offers an exchange specifically for retail investors.
• Over one million clients have already entrusted more than €30 billion to the platform.
• Founded in 2014, Scalable Capital now employs over 700 people across Munich, Berlin, Vienna, Milan, and London.
• Together with the founding and management team, including Erik Podzuweit and Florian Prucker, they are working on a new generation of financial services.
• Visit our finance blog or check out our Social Media channels to find out what our Expert Teams have to say.
• Values guide us every day in how we work and collaborate.
• To learn more about them, you can find our values here (English).

Responsibilities

• 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.
• 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.

Requirements

• Write clean, secure, well-tested and maintainable code, with particular attention to correctness, resilience and traceability when moving money.
• 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.

Benefits

• 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