Senior Software Engineer, 5G Physical Layer

The Senior Software Engineer focused on the 5G Physical Layer will lead the design, implementation, optimization, and integration of 5G  software for 3

GPP Release 15/16/17 and beyond‑5G systems. The position is based in Duisburg, Germany.

• Design, implement, and optimize 5G  algorithms on processor-based and heterogeneous SoC platforms
• Develop software for key PHY functions such as modulation/demodulation, channel estimation, equalization, synchronization, coding/decoding, and HARQ support
• Implement PHY software compliant with 3
  
  GPP Rel 15/16/17 specifications

• Integrate 5G PHY software with RF front-end hardware and digital baseband chains
• Develop and maintain hardware control software using interfaces such as I2C and SPI
• Work with complex SoC architectures, including ARM, DSPs, and hardware accelerators
• Develop software interfaces toward embedded accelerators and DSP blocks

• Design software within strict real‑time constraints and low‑latency requirements
• Develop on embedded Linux, DSP operating systems, and lightweight RTOS such as FreeRTOS and Zephyr
• Optimize performance, memory usage, and throughput of PHY software components

• Create and execute PHY‑level test cases and validation scenarios
• Generate, analyze, and verify PHY test vectors and waveforms
• Verify PHY functionality using 5G test equipment (e.g., R&S, Agilent) and commercial UEs
• Debug complex PHY, timing, RF, and performance issues across software and hardware boundaries

• Provide effort estimation and technical input for PHY software development tasks
• Support customer requests related to 5G PHY features and performance
• Document PHY designs, implementations, and results in Confluence or equivalent systems

• Collaborate with RF, systems, hardware, and protocol stack teams to ensure clean PHY‑MAC interfaces
• Work effectively in a global, distributed team across Europe, India, and the U.S.
• Follow SCRUM / Agile and Continuous Integration development practices
• Operate autonomously while maintaining strong technical communication

• Master of Science or Master of Engineering degree in Electrical Engineering, Communications Engineering, or equivalent
• Significant professional experience as an embedded C and C/C++ software engineer
• Strong background in 5G  and digital communications theory
• Experience working with SDR platforms and SoC architectures
• Working knowledge of MATLAB and Python for PHY algorithm development and analysis
• Strong understanding of real‑time embedded software constraints
• Excellent problem‑solving, time‑management, and communication skills
• Deep understanding of 3
  
  GPP 5G  specifications (Rel 15/16/17+)
• Experience with Non‑Terrestrial Networks (NTN) and satellite communications
• Experience implementing PHY algorithms on DSPs and hardware accelerators
• Strong understanding of link budgets, channel models, and RF impairments
• Experience with waveform generation, PHY simulation, and lab bring‑up

• Opportunity to really make a difference
• Sustainability at our core
• Fair and honest workplace
• Innovative thinking is encouraged
• Competitive salaries
• Continuous learning and development
• Health and wellness care options
• Financial solutions for the future