Develop and optimize UE Layer 2 and Layer 3 protocol stack (MAC, RLC, PDCP, RRC, NAS) for LTE and 5G NR. Implement 3GPP features, debug with protocol analyzers, integrate with PHY/L1, run functional and performance tests using UE simulators and network emulators, and ensure operator compliance.
We are looking for a talented and experienced User Equipment (UE) L2/L3 Developer to join our dynamic team at US20 - Nokia of America Corp. In this role, you will play a crucial part in developing and enhancing UE protocol stack software, ensuring compliance with 3GPP standards. Your expertise will contribute to the seamless integration of L2/L3 protocols with other layers, optimizing performance and power efficiency.
Responsibilities
- Design, develop, and optimize UE L2/L3 protocol stack software, including MAC, RLC, PDCP, RRC, and NAS.
- Implement 3GPP-specified features and enhancements for LTE and 5G NR.
- Analyze and debug L2/L3 layer issues using protocol analyzers and logs.
- Optimize protocol performance and throughput under various network conditions.
- Collaborate closely with PHY, L1, and higher-layer teams for seamless integration.
- Conduct functional and performance testing of L2/L3 protocols using UE simulators and network emulators.
- Stay updated with the latest 3GPP releases and integrate relevant changes.
- Ensure compliance with industry and operator requirements through cross-functional collaboration.
- Provide technical expertise and support to other team members as needed.
- Bachelor's or Master's degree in Computer Science, Electrical Engineering, Telecommunications, or a related field.
- 3 years of experience in developing and optimizing Layer 2 and Layer 3 protocols for 4G/5G UE.
- Strong programming skills in C/C++ for real-time and embedded systems.
- In-depth knowledge of 3GPP 4G/5G UE protocols, specifically L2 (MAC/RLC/PDCP) and L3 (RRC/NAS).
- Experience with debugging tools like Wireshark, QXDM, and UE log analyzers.
- Familiarity with RTOS/Linux-based development and multi-threaded programming.
- Preferred: Knowledge of 5G SA/NSA network architectures and PHY-MAC interactions.
- Excellent problem-solving and analytical skills.
- Effective communication and teamwork abilities.
- Ability to work independently and manage tasks efficiently.
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What you need to know about the Los Angeles Tech Scene
Los Angeles is a global leader in entertainment, so it’s no surprise that many of the biggest players in streaming, digital media and game development call the city home. But the city boasts plenty of non-entertainment innovation as well, with tech companies spanning verticals like AI, fintech, e-commerce and biotech. With major universities like Caltech, UCLA, USC and the nearby UC Irvine, the city has a steady supply of top-flight tech and engineering talent — not counting the graduates flocking to Los Angeles from across the world to enjoy its beaches, culture and year-round temperate climate.
Key Facts About Los Angeles Tech
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