Senior Kotlin Engineer (m/f/d)

Company: FlixTech (Flix)
Location: Berlin or Munich

About the Role

Join FlixTech's Finance Technology Stream within the Foundation Division as a Senior Kotlin Engineer. This team is dedicated to supporting business growth through smart, compliant, and automated finance solutions. You will focus on backend services, building and evolving scalable, event-driven systems that process, validate, and expose financial data. This role is ideal for someone who enjoys ownership, tackling real business problems, and contributing to the long-term foundations of an international company. Success is measured by data correctness, consistency, and trustworthiness.

Responsibilities

• Design, develop, and maintain backend services using Kotlin.
• Build and evolve scalable, event-driven systems for financial data processing, validation, and exposure.
• Own features end-to-end: technical design, implementation, testing, deployment, monitoring, and maintenance.
• Collaborate with Product Owners 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

• 5 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.
• Clear communication in English, open-minded, curious, and motivated to continuously improve.

We encourage you to apply even if you don't meet 100% of the requirements if you believe you can make an impact.

What We Offer

• Travel perks: 12 free Flix vouchers + 12 discount vouchers for friends & family.
• Work from (M)Anywhere: Work from another location for up to 60 days per year (role dependent).
• Hybrid work model: Flexibility to balance work and life.
• Wellbeing support: Confidential 1:1 counselling, courses, and stress management for you and up to four family members.
• Learning & Development: Access language classes, training courses, and expert-led sessions.
• Mentoring Program: Connect with experienced colleagues for insights and career acceleration.

See Flix Career Locations for local benefits.