Software Development Engineer III (Java Backend)

At SIXT, we are not just moving cars — we are moving businesses. As a Senior Backend Engineer in our B2B Sales team, you will build and scale the platform that powers enterprise sales and revenue management for clients worldwide. You will work on real challenges that matter, in a high-ownership environment built on cloud-native microservices where great engineering directly drives business growth. If this sounds like your next move, apply now and become part of something bigger. YOUR ROLE AT SIXT You will build reliable, consumer-facing backend software in Java that powers the B2B Sales platform, directly supporting sales performance and revenue management at scale You will design and own end-to-end distributed systems on the cloud, balancing scalability, resilience, and engineering craft across our microservices ecosystem You will develop shared libraries and internal tooling that raise the delivery velocity of the entire B2B Sales engineering team You will work on event-driven architectures, keeping yourself ahead of emerging technologies to build solutions that grow with SIXT's enterprise ambitions You will champion AI-assisted development as a core part of your engineering culture — integrating tools such as Cursor, and Claude into daily workflows while guiding the team on where human expertise must lead YOUR SKILLS MATTER You hold a B.Tech, B.E., or Master's Degree in Computer Science or a closely related discipline You bring 7–9 years of hands-on experience in sophisticated engineering environments — including cloud-native application development, scalability problem-solving, and event-driven system design, ideally within a start-up or scale-up setting You have strong, production-proven experience with Java and Spring Boot (must-have) and are confident navigating a modern microservices landscape end to end You have designed or operated distributed systems and microservices architectures, with a clear understanding of the trade-offs that come with operating at scale You have a solid grasp of event-driven patterns, pub-sub models, and message brokers such as Apache Kafka You actively use AI coding assistants — such as Cursor, Claude— to accelerate your work, while confidently recognising their limitations and knowing when engineering judgment must take precedence WHAT WE OFFER Grow Further, Go Further Advance your skills and unlock your potential with our Education Assistance Program Balance Your Career Benefit from a hybrid work environment complemented by flexible working hours Fuel Your Day Great work deserves great fuel. Enjoy meal benefits that keep you energized and ready to bring your A-game Your Wellness Matters We're committed to your well-being through comprehensive insurance, wellness programs, health checkups, and fitness benefits Recognition That Counts We create a culture of appreciation, rewarding your impact through referral incentives and loyalty perks as you advance with us Growing Families, Growing Joy As your family grows, we're here to celebrate with a special newborn gift for your little one About us: We are a globally leading mobility service provider with a revenue of €4.00 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 350,000 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 110 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. Get started with us and apply now!