Senior Firmware Engineer

About Fellow

We believe that the act of making should be meaningful and fulfilling, done with intention and precision. Fellow makes beautifully functional tools for any kitchen, designed in San Francisco and used around the world.

When the simple motions of life become small moments of joy, that's Everyday Magic.™

This role is based in our San Francisco, CA office and requires regular in-office presence in accordance with company policy.

Who You Are

Fellow is looking for a Senior Firmware Engineer to design, develop, and maintain robust, scalable UX and communication firmware for our IoT platform. You'll build the embedded systems that let customers interact with Fellow's connected products, making sure our hardware devices, mobile app, and cloud backend work together seamlessly.

A successful candidate will have deep experience with real-time operating systems, have shipped connected consumer products, and care as much about how a device feels to use as how efficiently it runs. This is a rare opportunity to shape the on-device experience of beautifully designed products used by coffee lovers around the world, as part of a small, agile team that owns the connected experience across on-device firmware, backend systems, and mobile apps.

Reporting to the Director of Firmware and Software, you'll serve as the connective tissue between product design, hardware engineering, and app development. You'll turn new product ideas into reliable, high-performance firmware. You bring strong technical judgment, a high bar for quality, and the instincts to ship on time in resource-constrained environments.

This is a hands-on engineering role. You'll help shape firmware architecture, and you'll also be the one writing, testing, and debugging the code.

What You'll Do

Develop embedded firmware using FreeRTOS that powers on-device GUIs, control systems, and connectivity to mobile applications

Architect and optimize firmware for resource-constrained environments, with a focus on efficiency, low power use, and stability

Lead firmware development that brings new product experiences to life, delivering high performance and reliability

Partner closely with product designers, hardware engineers, and app developers to imagine new product experiences and make sure on-device interfaces work smoothly in real time

Drive system optimization for real-time responsiveness, efficient memory use, and low power consumption

Set and uphold a high bar for reliability by testing and debugging firmware thoroughly with industry-standard tools and meeting performance benchmarks

Maintain and improve the connectivity between hardware devices, the mobile app, and the cloud backend

Champion AI, automation, and new ways of working to make firmware development, testing, and release more effective

Qualifications

6+ years of experience in embedded firmware development, focused on real-time operating systems (RTOS) and connected consumer products

Deep expertise in FreeRTOS or other RTOS environments, with a strong understanding of multitasking, scheduling, and system performance optimization

Strong knowledge of microcontroller platforms (ARM Cortex, STM32, etc.) and peripheral interfaces (I2C, SPI, UART)

Proficiency in C/C++ for embedded systems development

Experience working with on-device GUIs and integrating firmware with mobile applications

Strong debugging skills and experience with tools such as JTAG, oscilloscopes, and logic analyzers

Familiarity with embedded development tools (version control, CI/CD) and OTA firmware update processes

Excellent communicator and collaborator who works well across hardware, software, and design teams

Scrappy and agile, able to deliver on big expectations with limited resources

Ability to travel up to 10%

Preferred Qualifications

Experience with MQTT or other IoT communication protocols

Familiarity with wireless communication protocols (BLE, Wi-Fi) for IoT devices

Experience with GUI development frameworks for embedded devices

Experience with control systems and sensor integration (a plus, not required)

Familiarity with testing and validation for IoT hardware devices

Experience with mobile app deployment, managing updates, and mapping compatibility between on-device firmware and new mobile app capabilities

Knowledge of security practices for IoT devices and systems, including encryption, secure boot, and TLS/SSL protocols

Why You'll Love This Role

A creative, fast-moving environment where ideas turn into action

Competitive compensation including employee equity plan

Generous paid time off plan

401k with company contribution after 6 months of employment

Medical/dental/vision insurance

Better Yourself Wellness credit & Better Your Community donation matching

Monthly Fitness Stipend

Summer Fridays

Paid Parental Leave

Generous discount on Fellow products

Best coffee anywhere

The salary range for this position is $195,000–$215,000 plus 10% bonus & equity . We intentionally publish salary ranges to promote transparency and set clear expectations. Final compensation is determined based on a number of factors, including relevant experience, skills, expertise, scope of previous work, demonstrated impact, and internal equity. As a result, not every candidate will be hired at the top of the range.

Our highest goal at Fellow is creating a safe, inclusive, and rewarding environment where everyone can bring their whole selves to work and thrive. We are committed to building diverse teams and strongly encourage people from underrepresented groups, including but not limited to women, people of color, LGBTQIA+ individuals, people with disabilities, members of ethnic minorities, foreign-born residents, and veterans to apply.

Fellow is an equal opportunity employer. Applicants will not be discriminated against because of race, color, creed, sex, sexual orientation, gender identity, gender expression, age, religion, national origin, citizenship status, disability, ancestry, marital status, veteran status, medical condition or any protected category prohibited by local, state or federal laws.