Senior Firmware Engineer

SR2; San Francisco (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

SR2 is seeking a Senior Firmware Engineer in San Francisco to own firmware from bring-up to production. You will ship firmware to connected devices, enable OTA updates, and use telemetry to diagnose field issues.

This high-ownership role offers autonomy, fast pacing, and visible impact. You will work with hardware teams to advance boards from prototype to production and drive tooling improvements.

Qualifications

• 5+ years of production firmware experience in C/C++ and scripting or tooling in Python/Node.js.
• Experience with resource-constrained MCUs.
• Driver development for interfaces such as UART, I2C, SPI and USB with DMA.
• Shipped firmware to connected devices in the field including OTA updates and monitoring.
• Comfortable with schematics, datasheets, oscilloscopes and logic analyzers.

Responsibilities

• Bring up new boards and peripherals from prototype to production.
• Write efficient, reliable firmware and low-level drivers for microcontrollers.
• Ship over-the-air updates and use device data to diagnose issues in the field.
• Improve firmware tooling, CI and automated hardware testing.
• Support production builds and factory testing with manufacturing partners.

Skills

Firmware

C/C++

Python/Node.js

MCU experience

Diagnostics

Job description

A fast-growing connected hardware company is hiring a Senior Firmware Engineer. Their products are already deployed in the field, and firmware sits at the core of what they build.

This is a high-ownership role for an engineer who wants autonomy, pace and visible impact. You’ll take hardware from bring-up to production and ship firmware that reaches real users.

What You’ll Do

• Bring up new boards and peripherals alongside the electrical engineering team, from prototype to production
• Write efficient, reliable firmware and low-level drivers for microcontrollers
• Ship over-the-air updates and use device data to diagnose and fix issues in the field
• Improve firmware tooling, CI and automated hardware testing
• Support production builds and factory testing with manufacturing partners

Qualifications and Skills

• 5+ years writing production firmware in C/C++, plus scripting or tooling in Python or Node.js
• Experience on resource-constrained MCUs
• Driver development for interfaces such as UART, I2C, SPI and USB, including DMA
• Shipped firmware to connected devices in the field, including OTA updates and monitoring
• Comfortable with schematics, datasheets, oscilloscopes and logic analyzers
• Open to occasional travel
• Authorized to work in the US without sponsorship

Nice to Have

• Bluetooth and Wi-Fi
• Hardware startup background