Staff RF Coexistence Engineer (Coex)

General Motors•Sunnyvale, CA

1d•$134,700 - $207,600•Hybrid

About The Position

General Motors is transforming into a software‑defined, technology‑driven automotive company, with a growing emphasis on in‑house hardware and RF system design to enable faster innovation, deeper system integration, and improved product quality. We are seeking a highly skilled Senior RF Coexistence Engineer to support multi‑radio performance execution across GM’s next‑generation product platforms. In this role, you will focus on coexistence behavior, throughput, latency, and system‑level performance across cellular, Wi‑Fi, Bluetooth, GNSS, UWB, and emerging wireless technologies. This is a senior individual contributor role that plays a critical part in GM’s in‑house design (IHD) strategy, embedding coexistence expertise early in design, validation, and integration cycles while working within agile, cross‑functional development teams.

Requirements

M.S. in Electrical Engineering or related field (PhD preferred)
6–10 years of RF/wireless engineering experience with strong emphasis on coexistence (Coex)
Strong understanding of: Multi‑radio interference mechanisms, Wireless protocols (Wi‑Fi, Bluetooth, LTE/5G) and their interactions
Hands‑on experience with: Wireless test equipment (UXM, CMX, MT8000A, CMW500), OTA testing and coexistence validation setups, RF simulation tools (CST, HFSS, FEKO)
Proven system‑level debugging and data‑driven analysis skills

Nice To Haves

Automotive wireless systems (infotainment, telematics, connected vehicle platforms)
Consumer electronics (smartphones, wearables, AR/VR)
Experience supporting in‑house hardware or platform development teams
Familiarity with firmware‑driven coexistence algorithms and protocol analyzers

Responsibilities

Own coexistence performance execution for assigned systems, features, and vehicle programs
Develop and implement multi‑radio coexistence solutions within defined vehicle and system architectures
Support early design phases by identifying coexistence risks and opportunities aligned with GM’s in‑house development roadmap
Partner with internal design teams to reduce dependency on late‑stage supplier fixes
Analyze and improve: Throughput degradation, Latency, packet loss, and jitter, Radio contention and scheduling inefficiencies
Evaluate coexistence behavior in real‑world, in‑vehicle scenarios: Simultaneous radio operation (e.g., Wi‑Fi + Bluetooth audio + cellular data)
Support system trade‑offs balancing performance, power, cost, and use
Collaborate closely with internal: RF, antenna, PCB, SoC, and firmware teams
Enable faster iteration cycles by connecting: Early simulation, Bench and lab validation, Vehicle‑level testing
Support agile development models through incremental learning, fast debug, and early risk retirement
Influence system design decisions to improve coexistence performance, including: Antenna placement and isolation, RF front‑end architecture, Clocking and aggressor management
Collaborate with firmware and software teams on: Coexistence algorithms, Scheduling and arbitration mechanisms, Frequency hopping and time‑domain coordination
Act as a technical bridge between hardware realities and protocol‑level behavior
Develop and execute coexistence validation plans, including: OTA and conducted test methods, Throughput and sensitivity measurement under concurrent radio operation
Define and run coexistence test matrices and stress scenarios aligned with vehicle use cases
Utilize tools such as: Wireless test systems (UXM, CMX, MT8000A, CMW500), OTA chambers, spectrum/network analyzers, protocol analyzers, and sniffers
Lead root‑cause investigation of coexistence‑related performance issues by: Identifying aggressor / victim interactions, Analyzing conducted, radiated, and baseband coupling paths
Debug across multiple layers: RF front‑end and antenna systems, Baseband and firmware behavior, System scheduling and software interactions
Capture learnings to support reuse and continuous improvement within GM’s in‑house design ecosystem
Apply GM‑defined design‑for‑coexistence frameworks, including: PCB layout (grounding, isolation, return paths), Antenna placement and coupling minimization, Shielding, filtering, and noise mitigation, System‑level timing and resource management strategies
Support early‑stage coexistence modeling and simulation in collaboration with system architects
Serve as a go‑to coexistence subject‑matter expert for assigned programs
Mentor junior engineers on coexistence fundamentals, testing, and debug techniques
Contribute to in‑house guidelines, documentation, and repeatable technical practices
Provide technical input into architecture reviews, design decisions
Be comfortable is dealing with ambiguity, self starter setting objectives aligned with phase of the product development cycle