Matt Zimmerman
Director Of Engineering at DoorDash
San Francisco, California, United States
Summary
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RockstarMatt Zimmerman is a seasoned engineering leader with 24 years of experience, currently serving as Director of Engineering at DoorDash where he’s building production agentic AI systems. He combines hands-on principal-engineer chops with leadership of delivery and architecture, translating experimental AI into reliable, production-grade services. Based in San Francisco, he brings deep backend and test automation expertise—evidenced by contributions to the popular Home Assistant project fixing timezone-dependent tests and hardening sensor handling. Colleagues rely on him to balance pragmatic engineering trade-offs with long-term system health, and he still rolls up his sleeves to improve test suites and component reliability. Notably, his work spans both high-impact platform initiatives and nitty-gritty quality improvements that prevent subtle runtime failures.
24 years of coding experience
English
Github Skills (8)
iot10
pytest10
python10
home-automation10
asyncio9
mqtt8
mqttnet8
raspberry-pi7
Programming languages (9)
Github contributions (5)
home-assistant/core
Feb 2021 - Sep 2022
:house_with_garden: Open source home automation that puts local control and privacy first.
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:123 reviews, 51 commits, 67 PRs in 1 year 6 months
Contributions summary:Matt contributed to the `home-assistant/core` repository by fixing bugs and improving tests. The user addressed time zone dependencies in tests related to the Litter-Robot component and handled potential `None` values in smarttub sensor data. They also added a preset mapping for the "ready" heat mode in the smarttub climate component. The contributions involved code changes in Python files and included tests using pytest.
raspberry-pipythonhouseprivacy-firstasyncio
mdz/home-assistant-core
Jul 2020 - Feb 2025
:house_with_garden: Open source home automation that puts local control and privacy first
Contributions:4 PRs, 337 pushes, 95 branches in 4 years 8 months
raspberry-pihouseprivacy-firstprivacygarden
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