Mill is a waste prevention technology company reimagining what it means to eliminate waste, starting with food. We build smart systems and infrastructure for homes, businesses, and municipalities that transform food scraps from landfill-bound waste into valuable resources, including chicken feed. Tens of thousands of Mill’s residential food recyclers are already helping households divert millions of pounds of food scraps every year, paving the way for our upcoming launch of Mill Commercial—the industry’s first end-to-end solution for managing, understanding, and preventing food waste in commercial environments (e.g. grocery, restaurants, food services). At Mill, we are passionate about building easy-to-use, beautifully designed technologies that keep food in the food system and out of landfills.
We're seeking a Senior Firmware Engineer to design, develop, and implement low-level firmware for our next-generation connected product. You'll work closely with cloud services, mobile app, product and hardware teams to integrate Wi-Fi, Bluetooth, and other connectivity features seamlessly, while actively collaborating and contributing as a key team player.
Key Responsibilities- Design and implement robust firmware on MCU platforms, ensuring support for wireless connectivity, data upload, OTA updates, sensor integration, and other core functionalities.
- Develop and optimize communication stacks for Wi-Fi, Bluetooth, and other wireless protocols, ensuring reliable pairing, network configuration, and data exchange.
- Write efficient low-level code that integrates with hardware peripherals (e.g., RF modules, sensors) using standard interfaces such as GPIO, I2C, SPI, and UART.
- Apply best practices for error handling and performance optimization to support robust connectivity features.
- Work closely with cross-functional teams to rigorously debug, test, and troubleshoot firmware, ensuring optimal performance, reliability, and security.
- Engage actively with multidisciplinary teams, sharing insights and aligning on system-level requirements to drive cohesive project success.
- Contribute to the deployment readiness of our systems for large-scale production.
- Evaluate code from peers to maintain best practices in style, accuracy, and efficiency.
- Bachelor’s degree in Computer Science, Electrical Engineering, or equivalent experience, with 5+ years in embedded systems development.
- Deep understanding of computer networking and firmware for data-intensive applications.
- Strong expertise in C programming for embedded systems, with a solid grasp of memory management and real-time operating system principles.
- Hands-on experience with connectivity modules (Wi-Fi, Bluetooth) and RTOS (FreeRTOS preferred).
- Proficiency in hardware-software interfacing, including protocols like GPIO, I2C, SPI, and JTAG.
- Proficiency with troubleshooting tools (debuggers, Wireshark) and measurement equipment (multimeters, oscilloscopes, logic analyzers).
- Demonstrated expertise in debugging and rigorous testing to quickly identify and resolve complex issues.
- Familiarity with version control, CI, and build systems.
- Experience with ESP32 microcontrollers.
- Working knowledge of cloud computing protocols (e.g., MQTT) and platforms like AWS (AWS CDK is a plus).
- Experience with cellular connectivity.
- Excellent communication and interpersonal skills to foster a collaborative, team-oriented environment.
The estimated base salary range for this position is $225-250K, which does not include the value of benefits or a potential equity grant. A wide range of factors are considered in making compensation decisions, including but not limited to skill sets, market conditions, experience and training, licensure and certifications, and business and organizational needs.
Skills Required
- Bachelor's degree in Computer Science, Electrical Engineering, or equivalent experience
- 5+ years in embedded systems development
- Strong expertise in C programming for embedded systems
- Hands-on experience with connectivity modules (Wi-Fi, Bluetooth)
- Proficiency in hardware-software interfacing, including protocols GPIO, I2C, SPI
- Proficiency with troubleshooting tools (debuggers, Wireshark)
Mill Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Mill and has not been reviewed or approved by Mill.
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Fair & Transparent Compensation — Pay is positioned as competitive for several senior technical and business roles, supported by multiple six‑figure base ranges in recent postings. Total compensation snapshots commonly cluster in the mid‑ to high‑$100Ks for individual‑contributor roles, reinforcing a generally market-competitive posture for the Bay Area.
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Leave & Time Off Breadth — Time-off coverage appears broad, including paid holidays, paid sick days, flexible time off, and an unlimited vacation policy, with some company-wide time off. The overall setup signals strong flexibility for managing personal time, though day-to-day use may depend on team norms.
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Healthcare Strength — Core health coverage is described as comprehensive, including medical, dental, and vision, alongside wellness programs and an FSA. The package breadth suggests a solid baseline consistent with tech-startup standards.
Mill Insights
What We Do
We’re on a mission to eliminate waste for good, starting with the food that ends up in landfills. Did you know that more than half of the food in landfills comes from home kitchens (ReFED)? And food in landfills turns into methane – which is 80x more potent than CO2 over a 20-year period (IPCC). At Mill, we’re working to turn kitchen scraps into food for chickens. This keeps food in our food system and out of landfills.
Why Work With Us
Food isn't trash. Mill keeps it from stinking up your kitchen – and the planet.
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