Senior PHY Software Engineer – 2G/4G/5G

What you'll do:

- Design, develop, debug, integrate, and maintain PHY software for cellular communication systems.
- Work across 2G, 4G, and 5G, understanding PHY behavior, implementation, and interaction with the overall system.
- Analyze complex PHY issues using logs, traces, crash dumps, KPIs, configuration, and system behavior to identify root causes.
- Develop and optimize PHY software and algorithms to improve performance, reliability, and product quality.
- Work with existing codebases and repositories, understand implementation flows, and extend or modify them without destabilizing existing functionality.
- Collaborate with MAC, RLC, RRC, RF, DSP, HW, and system teams to resolve complex product and field issues.

What you should have:

- 10+ years of experience in wireless communication / PHY software development, integration, debugging, or system troubleshooting.
- Strong hands-on experience with 4G/LTE and/or 5G NR PHY, with working knowledge of other cellular RATs such as 2G.
- Good understanding of PHY architecture, algorithms, implementation, and interaction with other layers.
- Strong experience in PHY log analysis, debugging, issue isolation, and root-cause analysis, including the ability to identify non-obvious failure mechanisms.
- Ability to correlate logs, traces, configuration, KPIs, and system behavior rather than relying only on predefined or linear debugging procedures.
- Strong C/C++ programming and debugging skills, with good Python/scripting skills for automation and analysis.
- Good understanding of DSP, digital communication, PHY/RF concepts, and relevant 3GPP specifications.

AI & Automation – Good to Have:

- Exposure to AI/LLM-based developer tools or coding assistants.
- Interest in applying AI to software development, debugging, log analysis, and RCA.
- Experience with automation, log-processing, or internal debugging/analysis tools.
- Willingness to learn and adopt AI-assisted development and agent-based troubleshooting approaches.

AI experience is not mandatory. Strong PHY domain expertise, development experience, and troubleshooting ability are the primary requirements.

Nice to Have:

- Experience across multiple RATs, particularly 2G, 4G, and 5G.
- Experience with O-RAN / Open RAN or advanced 5G PHY features.
- Experience with MATLAB or similar tools for PHY analysis, modeling, or simulation.
- Experience with Linux, Git, ARM, SIMD/NEON/AVX, or optimized DSP implementations.
- Experience with telecom debugging and analysis tools such as Wireshark, Kibana, or similar platforms.

Role Evolution:

The initial focus will be on understanding the existing PHY implementation, logs, failure patterns, and troubleshooting methodologies. Over time, the engineer will contribute to building and improving AI-assisted RCA capabilities and use these capabilities as part of regular PHY development, debugging, and bug-fixing activities.

The objective is to combine deep PHY expertise with AI-assisted engineering to improve debugging efficiency, RCA accuracy, and overall product quality.