Senior Firmware Engineer, Cellular Protocol Stack

Google Google · Big Tech · New Taipei, Banqiao District, New Taipei City, Taiwan

Senior Firmware Engineer responsible for developing and verifying modem software for cellular protocols, focusing on NTN and DTC, and optimizing for mobility, latency, power efficiency, and performance in satellite networks. This role involves debugging, analysis, and fixing modem issues across various environments.

What you'd actually do

  1. Develop modem software and verify modem feature functionalities and performance for NTN (IoT-NTN and NR-NTN) and DTC (LTE and NR DTC).
  2. Solve system-level mobility, latency, and Doppler issues in satellite networks to enhance NTN user experience including voice, data, and power efficiency.
  3. Identify and implement modem software and hardware optimizations to minimize power drain, including algorithm tuning, power state management, and RF front-end interaction.
  4. Identify performance scenarios and recreate the scenario in the lab environment for research and development for optimized solutions. Work with test teams to define validation strategies and root-cause issues found during lab testing with satellite emulators and field trials.
  5. Debug, analyze, and fix modem issues from factory, certification, field, and end users. Work with vendors and solution providers on modem protocol design.

Skills

Required

  • Bachelor's degree in Computer Science, Electrical Engineering, Computer Engineering, a related technical field, or equivalent practical experience.
  • 7 years of experience with software development in one or more programming languages (e.g., C/C++).
  • Experience in cellular modem software development or protocol stack engineering (LTE, NR, or IoT).

Nice to have

  • Master's degree in Electrical Engineering or Computer Science in the field of wireless communications.
  • Experience with 3GPP protocol layers (e.g., RRC, NAS, MAC, RLC, PDCP, or PHY) and NTN.
  • Experience on modem function and performance troubleshooting in lab, field, and carrier tests.
  • Experience with Real-Time Operating Systems (RTOS) in embedded environments.
  • Understanding of wireless communication fundamentals and debugging modem issues.