Staff Software Development Engineer (m/f/d)

📋 Description

• Design, build, and evolve reliable and scalable backend services in modern Java and Spring Boot
• Stay hands-on in code, lead cross-team technical initiatives, and drive topics from idea to
• Work across REST and gRPC APIs, event-driven flows, PostgreSQL, Redis, Kafka, Flyway, and shared
• Raise the bar on architecture, observability, performance, security, testing, and developer
• Collaborate closely with product managers and cross-functional team members across backend, web
• Use AI-assisted tooling pragmatically where it improves quality, speed, or developer experience

🎯 Requirements

• Deep experience building backend services with modern Java and Spring Boot, operating at Staff
• Experienced in microservices and event-driven architectures, designing for reliability
• Worked with PostgreSQL, JPA/Hibernate, Flyway, Redis, and Kafka, and understand how to choose the
• Comfortable owning services in production environments and improving them through observability
• Comfortable using AI-assisted tools thoughtfully, applying them in reviewable, reliable, and useful
• Collaborative and product-minded, willing to work across the stack when needed; experience with

🎁 Benefits

• Extra benefits: discounts on SIXT rent, share, ride and SIXT+, attractive vehicle leasing offers
• Mobility boost: monthly mobility allowance of €20
• Future security: retirement plan contribution and capital-forming benefits
• Feel-good atmosphere: modern SIXT gym, leisure activities like gaming area or SIXT choir
• Flexibility: 30 days of vacation and hybrid working model with flexible hours
• Giving back: one day each year to volunteer at a charitable organization dedicated to supporting