Senior Software Developer Embedded Linux Systems (f/m/d)

• Your responsibilities
• You design and develop embedded software for FRITZ!OS.
• You translate complex requirements into modular architectures and robust, maintainable software.
• You take ownership of enhancements, adaptations and performance optimizations for the Linux kernel and drivers.
• You develop software for specialized So Cs with integrated hardware-offloading components for networking functions.
• You develop analysis and testing strategies to optimize FRITZ!OS, focusing on areas such as measurability, reproducibility and regression testing.
• You design, implement and maintain complex, cross-system software components - from the kernel to the application layer.

Your profile

• Several years of experience in the Embedded Linux kernel space within product development or production environments.
• Excellent C skills in low-level, hardware-oriented systems programming, knowledge of Python and, ideally, Rust.
• Hands‑on networking and data‑path experience, including a solid understanding of Ethernet and TCP/IP, as well as experience debugging Qo S, throughput, latency and packet‑loss issues.
• Proven experience with the Linux kernel and drivers, including kernel analysis and debugging, modifications and backports, Device Tree, kernel configuration and the network stack.
• Deep knowledge of the So C‑level stack, including ARM cores, DMA, interrupt handling, MMUs and memory layouts, as well as experience with real‑time systems and system‑level memory and performance optimization.
• Experience with hardware‑accelerated networking and network offloading.
• Confident use of Git and practical experience with established code‑review processes.
• Native‑level English or English proficiency at C1 level or above; knowledge of German is a plus.
• What You Can Look Forward To
• 30 days of annual leave, plus Christmas Eve and New Year’s Eve off
• Financial participation in the company’s success through bonus payments
• A €44 contribution towards your Deutschlandticket
• Sustainable mobility with our bicycle‑leasing offer through Job Rad
• Urban Sports Club membership
• An employer contribution of €27 per month towards capital‑forming savings benefits
• A meal allowance of up to €20 per week for Foodji
• A varied and complimentary breakfast selection
• Access to the Corporate Benefits programme
• Opportunities for workations, sabbaticals and job sharing
• Paid partner leave following the birth of a child
• Individual professional development opportunities and an open culture of learning from one another, for example during our Developer Coffee Breaks
• Unique team events, including barbecues, our Christmas party and the big FRITZ! Summer Festival, to which your family is also invited

At FRITZ!, we value diversity and equal opportunities because we believe that different perspectives and experiences are essential to our success.

We are committed to creating a working environment in which everyone feels equally welcome and can reach their full potential - regardless of gender, nationality, religion, ethnic or social background, disability, age, sexual orientation or gender identity.

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