Kotlin Backend Engineer

We're looking for a talented mid-level Kotlin Engineer (m/f/d) to join us in Berlin or Munich.   In the Foundation Division of FlixTech, our Finance Technology Stream helps the business grow efficiently by delivering smart, compliant, and automated finance solutions. We keep things simple for our internal users so they can spend less time on manual tasks and more time on what matters. The team you will join is not focused on user-facing experiences or polished UIs. Our success is measured by data correctness, consistency, and trustworthiness, even in complex and evolving business scenarios. You'll be part of a self-managed, cross-functional team with a Product Owner and fellow Software Engineers, directly supporting new country launches, new business models, and the continuous evolution of Flix's financial backbone.  This role is well-suited for someone who enjoys ownership, working close to real business problems, and contributing to the long-term foundations of an international company. If you value collaboration, thoughtful engineering, and building systems that need to be right, not just fast, we'd love to meet you.  About the Role Design, develop, and maintain backend services using Kotlin  Build and evolve scalable, event-driven systems that process, validate, and expose financial data  Own features end-to-end: from technical design and implementation to testing, deployment, monitoring, and ongoing maintenance  Collaborate closely with the Product Owner and Finance stakeholders to translate business requirements into robust technical solutions  Ensure data accuracy, traceability, and auditability across financial and accounting flows  Improve system reliability, observability, and performance for business-critical processes  Contribute to clean code, architectural discussions, and continuous improvement of engineering practices  About You 3 years of experience as a Software Engineer working with Kotlin  Hands-on experience building backend services using the Spring ecosystem (e.g. Spring Boot, Spring Data)  Experience with event-driven design (e.g. asynchronous processing, messaging, domain events)  Practical experience with cloud platforms (preferably AWS, or similar)  Solid understanding of databases, both NoSQL (e.g. DynamoDB) and/or relational systems  Comfortable working in complex, data-heavy domains (ideally Finance), where investigation, analysis, and precision are key  Communicate clearly in English, open-minded, curious, and motivated to continuously improve both yourself and the systems you work on  We recognize that everyone carries a unique set of valuable skills and experiences. If you think you could have an impact even though you don't meet 100% of the requirements, we still encourage you to apply. We want to hear from you!   What We Offer Travel perks: 12 free Flix vouche