Senior Java Engineer (m/f/d)

Sixt; München; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Discounts on SIXT rent and mobility

Hybrid working model

Company gym and employee restaurant

Job summary

SIXT is seeking a skilled backend engineer to design and ship cloud-native Java services that power car sharing and micro-mobility across Europe. You will own distributed systems end to end, collaborating with Product and business teams to craft robust, scalable solutions.

Join a team that values architectural judgment, reliability, and end-to-end responsibility—from development and testing to deployment, monitoring, and on-call support in a hybrid work setup.

Qualifications

• Proven experience in Java backend development with Spring Boot.
• Strong understanding of microservices and event-driven design for reliability and scalability.

Responsibilities

• Design and ship backend Java services that thousands of customers rely on daily.
• Own customer-facing distributed systems end to end, from problem understanding to production fixes.
• Bring engineering judgment to product discussions, shaping solutions rather than just implementing them.
• Design and build services, features, and tooling powering the platform, from microservices to APIs and internal tools.
• Own end-to-end operations, including on-call, for building, testing, deploying and monitoring services.

Skills

Java

Spring Boot

Go

Microservices

Event-driven

PostgreSQL

JPA/Hibernate

Flyway

Redis

Kafka

Observability

CI/CD

Kubernetes

Agentic workflows

Business translation

Tools

Kubernetes

Kafka

PostgreSQL

Redis

JPA/Hibernate

Job description

This role at SIXT is pivotal for shaping the future of mobility. You will be crafting a cloud-native microservices platform that brings excitement and seamless experiences to users across Europe, covering everything from car sharing to micro-mobility services. We're looking for someone who thinks beyond the code, partnering closely with Product and the business to shape the right solution through agentic-native development. Join us if you are passionate about building highly scalable, reliable backend services, shaping product direction, and want to make a real impact on next-generation mobility solutions.

YOUR ROLE AT SIXT

You design and ship backend Java services that thousands of customers depend on every day

You own customer-facing distributed systems end to end, from understanding the real problem behind a request to running the fix in production

You bring engineering judgment into every conversation with Product Owners and stakeholders, shaping the solution instead of just executing it

You design and build the services, features, and tooling that power our platform, from microservices to APIs to the tools your own team relies on

You build it, you run it, you own it: full end-to-end responsibility, including on-call, for building, testing, deploying, and monitoring your service

You work agent-first by default: implementation runs through agents, judgment and ownership stay with you

YOUR SKILLS MATTER

• Experience You have development experience in Java, and Spring Boot is a must. Familiarity with Go is beneficial
• Architecture You are experienced in microservices and event-driven architectures, and know how to design for reliability, scalability, idempotency, and long-term maintainability
• Data Stores You have worked with PostgreSQL, JPA/Hibernate, Flyway, Redis, and Kafka, and understand how to choose the right persistence and messaging pattern for the problem
• Operations You are comfortable owning services in production, improving them through observability, metrics, alerting, CI/CD, and Kubernetes-based operations
• AI-Native Engineering You run agentic workflows end to end: orchestrating agents, judging their output, and tuning the eval loops that keep quality high without reviewing every line yourself
• Curiosity You're genuinely curious about the customer's problem, not just the code. You move comfortably across the stack, translate technical trade-offs into plain business language, and treat a great product conversation as seriously as a great pull request

WHAT WE OFFER

• Extra benefits Enjoy discounts on SIXT rent, share, ride and SIXT+, attractive vehicle leasing offers, and exclusive deals with partners for travel, tech, fashion and more
• Mobility boost We support you with a monthly mobility allowance of €20 per month for even more freedom
• Future security We contribute to your retirement plan and support you with capital-forming benefits to ensure you are well covered
• Feel-good atmosphere Stay active with our modern SIXT gym, various leisure activities like the gaming area or the SIXT choir, and enjoy our high-quality employee restaurant
• Flexibility Enjoy 30 days of vacation and a hybrid working model with flexible hours
• Giving back Take one day each year to volunteer at a charitable organization dedicated to supporting children

About us:

We are a globally leading mobility service provider with a revenue of €4.3 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 360,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 100 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight.