Senior Embedded Software Engineer, Test

Tools for Humanity•San Francisco, CA

6d•$176,000 - $220,000

About The Position

We are looking for a Senior Embedded Software Engineer, Test to own hardware components of our automated and manual test platforms in Device Software. This role identifies, defines and builds hardware systems needed to automate user behavior in a test environment. This role operates alongside but independently from product development teams, with clear accountability for release readiness, test coverage, and test fleet health. You will design, build, and operate a scalable automated test infrastructure spanning devices and hardware-in-the-loop (HIL) systems. Your work will directly enable faster development cycles, higher release confidence, and fewer issues reaching the field. You will write and review test code, design physical test architectures, interact directly with hardware to help set the quality bar for multiple device product lines. Over time, this role will define how quality scales as our device portfolio, team size, and system complexity grow.

Requirements

Vast experience being hands-on with software and hardware, comfortable debugging real devices, test rigs, and electrical signals
Have designed or owned automation hardware systems at scale, including fleets of test devices
Write and review high-quality test code and enjoy building reusable, maintainable test frameworks and libraries
Can read production firmware and software code to understand system behavior and translate that understanding into targeted tests
Are naturally curious and proactive— you dig for bugs, edge cases, and failure modes others miss. A human fuzz tester
Are comfortable setting direction with ambiguity and do not require detailed test instructions to get started
Love to collaborate and operate with low ego, earning trust by delivering value
Think in systems—anticipating future bottlenecks in testing, release processes, and infrastructure before they become problems
Are not afraid to break things in the name of learning, validation, and quality

Responsibilities

Own hardware designs of HIL testers for Device Software
Design, implement, and evolve a large-scale automated test fleet, including test devices, test stations, and custom HIL systems
Architect and operate test infrastructure spanning: Devices (Orb and future products) Test stations that interact with devices like a human would
Define quality benchmarks and test strategies in partnership with project leads for new products and features
Investigate and reproduce field issues, acting as first-line triage before handing off to firmware, software, hardware, and backend teams as needed.
Continuously improve test coverage, execution speed, and system reliability, including negative and fault-injection testing