SIXT
Technology
SeniorFullStackEngineer–Java/React(m/f/d)
Neural analysis suggests this role is
optimal for mid candidates.
“Senior Full Stack Engineer – Java/React (m/f/d) at SIXT. Skills: Java, React, Distributed systems, Microservices. Understand business processes. Translate processes into solutions”
Industry & Context.
What They're Looking For.
Must Have
Java experience, Spring Boot experience, React experience, TypeScript experience, Complex production environments experience, Cloud-native systems design, Distributed systems design, Microservices architecture understanding, Event-driven systems experience, Messaging technologies experience, Modern engineering workflows experience, Agentic tools experience
Nice to Have
Legacy system modernization experience, Data migration experience, Transformation programs experience
What You'll Do.
Understand business processes
Translate processes into solutions
Contribute to modernization
Design distributed systems
Develop distributed systems
Work on event-driven architectures
Act as senior contributor
Enable engineering teams
How You'll Work.
Team & Collaboration
Governance-oriented team; Engineering teams; Product experts; Business teams
Full Job Description
We are modernizing several of SIXT’s business-critical core systems by replacing legacy vendor solutions with in-house platforms used across the whole company. We are now transitioning from external/legacy solutions into fully owned internal systems, and you will play a key role in redefining how these systems are designed, built, and operated. If you want to help shape the next generation of these platforms and contribute to a large-scale transformation program, apply now. YOUR ROLE AT SIXT * Understand business processes behind systems and translate them into scalable in-house solutions, not just code implementations * Contribute to the modernization of legacy systems into internal platforms as part of a broader transformation initiative * Design and develop end-to-end distributed systems across backend (Java) and frontend (React/TypeScript) * Work on event-driven architectures using Kafka and cloud-native technologies (AWS-based environments) * Build and evolve APIs (including gRPC-based services) and UI components within a microservices ecosystem * Act as a senior contributor in a governance-oriented team that enables engineering teams through standards, architecture and technical guidance YOUR SKILLS MATTER * Strong experience with Java, Spring Boot, React and TypeScript in complex production environments * Proven background in designing and building cloud-native, distributed systems (AWS or similar) * Deep understanding of microservices architecture, ideally with hexagonal/clean architecture principles * Solid experience with event-driven systems and messaging technologies (Kafka, RabbitMQ or similar) * Hands-on experience with modern engineering workflows and agentic tools (e.g., Claude Code, Cursor), used intentionally to improve delivery quality and speed * Nice to have: experience in legacy system modernization, data migration, or transformation programs in enterprise environments WHAT WE OFFER * A Global Tech Hub in Lisbon Join a thriving international te
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