Java Engineer

About Flix

If you’re looking for a place where you can drive change and redefine how millions of people travel, Flix is the place where you can lead your journey!

Responsibilities

• We are looking for a skilled Java Engineer for service agreement collaboration (B2B contract) to cooperate with a team dedicated to Network Planning at FlixTrain - building internal tools that help plan the timetable and vehicle allocation, reduce manual processes, and increase productivity. This is a greenfield environment with plenty of room to shape new products from the ground up and explore innovative solutions for our internal users.
• Scope of Services
• You will independently design, develop and deliver reliable backend services within a self-organized, cross-functional, distributed team. This includes building robust APIs and event-driven integrations for our internal tools, with a strong focus on internal user needs. You will also help drive backend architecture decisions and contribute to technical quality across teams through code reviews and close collaboration.

About the Engagement

• Design, build and maintain backend services and APIs that automate and simplify FlixTrain Network Planning workflows
• Develop and evolve data models and integrations, including asynchronous, event-driven communication between services
• Work with internal users, product and other engineers to understand their needs and turn them into practical technical solutions
• Write and maintain automated tests to ensure the reliability and maintainability of the services you deliver
• Collaborate with other engineers across a distributed architecture within an Agile environment
• Document technical decisions, solutions and ways of working
• Kafka
• Kubernetes
• GraphQL

Requirements

• Java with Spring Boot
• PostgreSQL
• You have 3 to 5 years of experience building backend applications, from which a couple of years building backend applications in Java or another JVM language such as Kotlin
• You have worked in cloud environments (ideally AWS)
• You have practical experience with at least one of the following:
• Building and running on AWS
• Designing, building and maintaining event-driven systems with Kafka

Managing infrastructure as code, ideally with Terraform

• You write automated tests as a natural part of your development process and care about code quality and maintainability
• Understanding of event-driven systems and how to work with them
• Solid written and spoken English skills
• Experience working in an Agile setup
• Curiosity about the business domain. Interest in transportation, logistics or similarly complex domains is a good signal, as is the ability to explain such a domain clearly

Preferred

• Experience building services with Spring Boot

Experience working with databases, relational and/or NoSQL

• Experience with CI/CD pipelines (GitLab CI or GitHub Actions)
• A DevOps mindset: you are willing to own pipelines, infrastructure and quality, not just the application code
• Experience with agentic or AI-assisted coding
• 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!

Pay

Rate: 89 – 119 PLN/hour (B2B)

Benefits

• Travel perks: 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.
• To view more local benefits specific to each office location, please check out this link:
• Locations - Flix Career
• Why Join Flix?
• At Flix, we empower our teams to push boundaries and shape the future of mobility. As we continue to scale globally, we harness cutting-edge technology to make mobility smarter, more sustainable, and more affordable.