Senior Firmware Engineer, Mill
User Interface
$170-225k
Office located in San Bruno, CA
Food waste recycling company
Open for applications
Food waste recycling company
501-1000 employees
Open for applications
$170-225k
Office located in San Bruno, CA
501-1000 employees
Company mission
To keep food from stinking up your kitchen — and the planet.
Role
Who you are
- Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or related discipline, or equivalent experience
- 5+ years of experience in embedded firmware/software engineering, working on real products that ship to customers
- Strong proficiency in C/C++ for embedded systems (MCUs and/or Linux), with a solid understanding of memory management, interrupts, DMA, and real-time constraints
- Hands-on experience developing on Linux-based embedded platforms (e.g., Raspberry Pi, SoMs/compute modules, or similar SBCs): cross-compilation, toolchains, and debugging on target
- Solid understanding of I²C, SPI, UART, GPIO, and related low-level interfaces; comfortable reading schematics and hardware datasheets
- Experience bringing up new boards or hardware revisions and integrating drivers into a Linux system (kernel modules and/or device-tree-level configuration)
- Proven prototyping ability—quickly translating high-level product requirements into
- Strong debugging skills, including use of JTAG, GDB, logging/tracing, and lab instruments (oscilloscope, logic analyzer)
- Excellent communication skills, capable of producing clear documentation, architecture diagrams, and collaborating effectively across disciplines
Desirable
- Experience integrating and tuning display pipelines and touchscreens for embedded products
- Experience with embedded UI frameworks or stacks (e.g., Qt Embedded, LVGL, Flutter, or web-based UIs on embedded browsers)
- Familiarity with Linux system architecture for embedded devices: systemd, device trees, kernel configuration, packaging, and build systems (Yocto, Buildroot, Debian-based, etc.)
- Experience with OTA firmware/software update mechanisms for both MCUs (bootloaders) and Linux SoCs (partitioning, rollback strategies)
- Exposure to camera or vision systems (e.g., basic camera bring-up, simple image capture pipelines) is a plus but not required
- Previous experience in startups or rapid prototyping environments, comfortable working through ambiguity and iterating quickly
- Familiarity with Agile methodologies, version control (Git/GitHub), CI/CD pipelines, and project management tools (e.g., JIRA)
What the job involves
- We are seeking an extraordinary Firmware Engineer to lead development of the embedded software platform for our next-generation product
- You will work across Linux-based systems (e.g., Raspberry Pi–class SoCs) and microcontrollers to bring up hardware, integrate sensors and actuators, and power the product’s user interface and overall experience
- Collaborating closely with hardware designers, product, and software teams, your work will be crucial in turning innovative concepts into reliable, delightful products in people’s homes
- Design, implement, and maintain firmware and Linux-based services for our core product platform (e.g., Raspberry Pi or similar SoCs plus companion MCUs)
- Bring up new hardware: bootloaders, board support packages, device trees, and low-level drivers for sensors, motors, connectivity modules, and other peripherals
- Implement and debug drivers and application-level interfaces for I²C, SPI, UART, GPIO, PWM, and other common embedded buses
- Integrate and support displays (HDMI/DSI/LVDS), working closely with design and product teams to deliver responsive, reliable UIs
- Collaborate with software/UI engineers to enable embedded UI frameworks (e.g., Qt, LVGL, or browser-based UIs) and ensure smooth interaction between firmware, UI, and cloud services
- Define and implement inter-processor communication between Linux SoCs and MCUs for telemetry, control, and safety-critical paths
- Profile and optimize system performance and robustness, ensuring that UI, connectivity, sensors, and actuators coexist without performance degradation
Our take
Wasted food and its decomposition do more for CO2 emissions globally than the entire airline industry combined. Whilst food waste bins run by local councils in the US do redirect the majority of food waste to recycling plants, there are still holes to plug, which is exactly what Mill is doing.
For a yearly subscription, customers can buy and use a combined waste tracking and impact app alongside the company’s purpose-made food waste bin. Unlike other bins for food waste, Mill’s product shrinks and dehydrates waste so that there’s no smell or runoff. Mill will dispose of your waste themselves, and use it for sustainable chicken feed.
With a number of high profile environmentally-friendly investors behind them, the Mill ecosystem has a range of benefits for company subscribers as well as individuals. Restaurants and offices can subscribe to Mill and help to move towards sustainability goals, whilst partnerships with local farms provide a solid revenue structure.
Mill is only available in the US, but since its successful first-gen launch in 2023, it has been using funding from that year to enhance its product offering and reach a wider market.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
29% employee growth in 12 months
Company
Funding (2 rounds)
Sep 2023
$70m
SERIES C
Jan 2023
$100m
LATE VC
Total funding: $170m
Company HQ
San Bruno, CA
Leadership
Harry Tannenbaum
(Founder & President)Previously Director of Hardware at Google, Director of Business Analytics and eCommerce at Nest Labs and Analyst at Gleacher Partner.
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