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

Overview

Staff Software Engineer for SIXT’s Rental Platform, shaping the software architecture that supports branch operations globally.

What you'll do

• Set the architectural direction for software that runs every SIXT branch.
• Design how software interacts in real time with physical devices at the branch.
• Drive system-design choices for the branch domain (event-driven flows, API contracts, state ownership, device-to-cloud protocols).
• Own end-to-end architecture across branch surface elements such as counter, checkout, key handover, vehicle exchange, and return.
• Advance engineering practice across multiple teams via design docs, technical reviews, and hands-on engagement.
• Spend real time at the branches to shape architecture where it runs with agents, devices, and customers.

What you'll need

• Have several years building production software systems at customer-facing, multi-region scale.
• Demonstrate system design depth from API design and data modeling to event/stream patterns and state ownership.
• Have shipped software that communicates with physical devices such as POS hardware or embedded clients.
• Be able to build real-time stateful client-server protocols including MQTT, WebSockets, or gRPC streaming.
• Be comfortable with backend technologies such as Go/Java/Python, Kafka, Postgres/Redis, and cloud on AWS/Kubernetes.
• Have led architectural change across multiple teams.
• Write design docs that others actually want to read.

Details

• Location: Munich, BY, Germany.
• Work includes hands-on presence at the branches; headquartered in Pullach close to Munich.
• Work model: hybrid working model with flexible hours.