Senior Kotlin Backend Engineer (m/f/d) at Flix | Berlin, DE | Rezi

Senior Kotlin Backend Engineer (m/f/d) at Flix

Senior Kotlin Backend Engineer (m/f/d)

Flix · Berlin, DE

1 months ago

Senior Kotlin Backend Engineer (m/f/d)

Flix · Berlin, DE

2 months ago
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About the Role

The Finance Technology Stream within FlixTech's Foundation Division delivers smart, compliant, and automated finance solutions to support business growth. This role focuses on backend services, data correctness, and supporting financial backbone evolution, suitable for someone who enjoys ownership and working on real business problems.

Responsibilities

  • 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

Requirements

  • 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
  • Communicate clearly in English, open-minded, curious, and motivated to continuously improve both yourself and the systems you work on

Skills

  • Kotlin
  • Spring ecosystem
  • Spring Boot
  • Spring Data
  • Event-driven design
  • Asynchronous processing
  • Messaging
  • Domain events
  • Cloud platforms
  • AWS
  • NoSQL databases
  • DynamoDB
  • Relational databases
  • Data analysis
  • English communication

Location

  • Berlin
  • Munich

Work Type

  • Hybrid work model
  • Work from Anywhere (up to 60 days per year)

Experience Level

  • Senior

Benefits

  • 12 free Flix vouchers + 12 discount vouchers for friends & family
  • Work from (M)Anywhere: Depending on your role, work from another location for up to 60 days per year.
  • Hybrid work model: We are an office-first company, but we offer flexibility to balance work and life.
  • Wellbeing support: Access confidential 1:1 counselling, courses, and stress management for yourself and up to four family members.
  • Learning & Development: Take advantage of language classes, training courses, and expert-led sessions to grow your skills.
  • Mentoring Program: Connect with experienced colleagues to gain insights and accelerate your career.

About the Company

  • At Flix, you’ll find teams that rally together to overcome challenges and spark creativity.
  • We believe in ownership culture - giving you the freedom to take initiative, make an impact, and shape your own career path.
  • As we continue to expand across the globe, you can make a real difference in how we work.
  • If you’re ready to grow and lead your journey, Flix is the place for you!