DoorDash

Radio Frequency Hardware Engineer

San Francisco, CAFrom $205kmidAdded today

About this role

DoorDash Labs seeks a Senior RF Hardware Engineer to design and validate mission-critical RF/electrical systems for autonomous last-mile delivery platforms. You'll lead RF hardware development across the product lifecycle, from prototyping to production, with expertise in interference mitigation, wireless technologies (LTE, 5G, Wi-Fi, GPS, UWB), and system-level optimization.

What you'll do

Design and optimize RF/mixed-signal PCBAs with focus on interference mitigation and desense analysis
Conduct lab and OTA testing of RF systems including sensitivity and coexistence evaluations across multiple wireless standards
Perform electromagnetic simulations using CAD tools (CST, HFSS, ADS) to inform design decisions
Characterize EMI from internal and external sources through probes, shielding tests, and layout reviews
Mentor cross-functional teams on EMI mitigation strategies and debug processes
Communicate technical challenges and trade-offs to engineering and executive stakeholders

What they're looking for

RF hardware design and validation
Electromagnetic theory and wireless system design
LTE, 5G NR, Wi-Fi, GPS, and UWB technologies
RF test equipment (spectrum analyzers, network analyzers, oscilloscopes)
EM simulation tools (CST, HFSS, ADS)
High-speed digital interfaces (MIPI CSI/DSI, PCIe, DDR, SDIO/eMMC)
Desense mitigation techniques (shielding, grounding, filtering)
Data analysis and technical reporting

Benefits

401(k) plan with employer matching
16 weeks of paid parental leave
Medical, dental, and vision coverage
11 paid holidays plus PTO and sick leave
Equity grant opportunities
Wellness, commuter benefits, and mental health program

Likely interview questions

Describe your experience designing RF front-end circuits for mass-produced consumer products and the key design tradeoffs you managed.
Walk us through a complex desense problem you debugged—what root causes did you identify and how did you validate your mitigation approach?

How have you used EM simulation tools to predict and prevent RF performance issues before hardware testing?
Tell us about your experience with coexistence testing across multiple wireless standards and how you've handled interference between them.
Describe your hands-on experience with RF test equipment and a time when measurements revealed something unexpected about your design.
How do you approach mentoring or communicating complex RF/EMI concepts to non-RF engineers and executives?
What experience do you have integrating high-speed digital interfaces (PCIe, DDR, MIPI) with RF systems and managing signal integrity?

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