(Staff) Software Engineer – Rental Platform (m/f/d)

In this role you will shape the future of software that seamlessly connects physical branches worldwide with real-time technology. You will design and lead software architecture for over 2,000 branches in more than 110 countries. Your role combines deep technical insight with hands-on presence in the field, bridging software and hardware to enable the next generation of SIXT’s rental experience. Sounds exciting? Then apply now and join Team Orange in our headquarters in Pullach close to Munich. YOUR ROLE AT SIXT You set the architectural direction for the software that runs every SIXT branch. Counter, checkout, key handover, vehicle exchange and return, plus the devices and IT services connecting them. End-to-end across the branch surface You design at the software ↔ hardware intersection. Counter PCs, customer tablets, POS terminals, scanners, keyboxes — you model how our software speaks to physical devices in real time, and you shape the integration patterns the whole organisation will adopt You drive system-design choices across the branch domain — event-driven flows, API contracts, state ownership, device-to-cloud protocols, the boundaries between modern services and legacy interfaces. This is hands-on architecture, not architecture-by-slide-deck You grow the engineering practice around you — across the multiple teams that touch the branch (Checkout, Counter, Rental Platform, Turnaround, Keybox, Tablet/POS) through clean design docs, sharp technical reviews, and hands-on engagement when a problem is gnarly enough to warrant it You spend real time at the branches. The strongest architecture is shaped where the system actually runs — with agents, with devices, and with customers YOUR SKILLS MATTER Expertise You have several years building production software systems at meaningful scale — customer-facing, multi-region — with a track record of taking systems from "they work" to "they are elegant and they scale" System design depth You can sketch the architecture of