Senior Java Engineer (m/f/d) - FlixTrain Fleet Management System

Senior Java Engineer (m/f/d) - FlixTrain Fleet Management System

City: Berlin

Department: IT & Engineering

Recruiter: Anna Symonenko

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At Flix, we offer a tech-driven environment where innovation meets real-world impact, with competitive pay, strong growth opportunities, and a culture of collaboration and ownership.

As a Senior Java Backend Engineer you will be part of a team that focuses on automating and streamlining FlixTrains operational processes, creating internal tools that help teams manage a growing and increasingly modern fleet. Youll join a small, collaborative team (6 people) with a strong sense of ownership and a pragmatic, low-bureaucracy way of working.

The team is part of the FlixTrain Tech division, which currently consists of three product teams and is set to grow significantly over the coming year, expanding to six teams as FlixTrain continues to scale its operations, fleet, and supporting technology. The complexity of our operations grows and so does the need for reliable, well-designed systems that reduce manual work, support regulatory requirements, and enable teams to operate efficiently at scale.

This role sits in a greenfield environment, where many systems are designed and built from scratch. Engineers are closely involved throughout the entire lifecycle: understanding operational challenges, contributing to architectural decisions, and ensuring high quality through solid testing practices. We value engineers who are curious about the business, eager to participate in discovery and problem framing, and comfortable navigating ambiguity.

Our Tech Stack: Java, Spring/Spring Boot, Kafka, MySQL (RDS), MongoDB (DocumentDB), AWS, Docker, Gitlab CI, Kubernetes, Terraform, Datadog

About the Role

You will be part of a self-organized, cross-functional distributed team owning set of products and will hence directly contribute to the success of the business

You and your team will place our users at the center when developing solutions together

You drive the development process using an Agile environment

You will be able to design new products from scratch and frequently deliver new versions of existing products, using continuous integration and automation

You will work with and learn how to use cutting-edge technologies and tools

Lead technical decisions inside and across teams to improve technical excellence through lateral leadership

Be a mentor and coach for your colleagues

About You

5+ years of professional experience with Java

Strong experience developing distributed systems using Spring Boot

Experience with relational (MySQL, PostgreSQL, RDS) and no-SQL databases (MongoDB, DocumentDB)

Experience with caching solutions such us Redis, ElastiCache

Experience with event-driven architectures and messaging services like Kafka/SQS/SNS/RabbitMQ

Hands-on experience with AWS services (e.g. RDS, S3, EC2)

Experience with DevOps and infrastructure technologies, including Docker, k8s, GitLab CI, Terraform, and Datadog

Upper-intermediate level of English or higher

Experience working within an Agile setup

Nice to have:

Data Engineering skills: ETL, Snowflake, etc.

Youve worked with distributed teams before

Upper-intermediate level of German or higher

We recognize that everyone carries a unique set of valuable skills and experiences. If you think you could have an impact even though you dont 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 vouchers + 12 discount vouchers for friends & family.