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

Flix
Berlin, Germanyfull_timePosted 13 May 2026

About the role

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 FlixTrain's operational processes, creating internal tools that help teams manage a growing and increasingly modern fleet. You'll 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

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Company

Flix

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