Firmware Engineer

About Fellow

At Fellow, we’re on a mission to help people brew ridiculously good coffee at home. But we’re more than just beautifully designed kettles and grinders—we’re a brand built on innovation, community, and culture. We believe great coffee isn’t just about the final cup; it’s about the experience, the ritual, and the people who make it all happen.

We’re looking for a Firmware Engineer to design, develop, and maintain robust and scalable UI and communication firmware for our IoT platform.

This role is based in our office in San Francisco, CA and is required to be in-office 4 days per week.

Who You Are

We are a small, agile team passionate about delivering high-quality experiences across on-device firmware, backend systems, and mobile apps. These experiences enable our customers to interact with Fellow’s connected products.

You will be responsible for the development, maintenance, and optimization of our backend systems and IoT infrastructure. Your role will be critical in ensuring seamless connectivity between our hardware devices, mobile app, and cloud backend.

What You’ll Do

• UI: Develop, and maintain robust and scalable UI architecture for our IoT devices using LVGL. Develop a UI library that supports all future IoT devices. Work with designers to implement a highly responsive and stable UI. Assist BSP and control firmware engineers to set up simple but proper UI elements for factory tests.

• UI Communication to Lower Layer: Maintain and upgrade our internal communication transfer layer (aka Brista). Enable communication to external hosts (like a desktop/laptop computer) through serial (at early prototype stage) and wifi (at later mass production stage).

• Integration of AI:

• Design and implementation: Leverage AI to improve efficiency to convert Figma Design to real implementation.

• Code Review: help integrate AI for code review, and other activities on GitHub

• Analytics: Own analytics for user interactions, on-device Business Intelligence, and stability analysis. Proactively address issues at staging before they go into production.

• Collaboration: Work closely with the software development, product management, and QA teams to ensure that the entire development and release process is smooth and efficient.

• Identify potential risks in software development and create strategies to mitigate them, ensuring the safety and efficacy of our appliances.

Qualifications

• 5+ years of experience in firmware engineering, with experience in real-time operating systems (RTOS), C/C++, and LVGL

• Experience with UI implementation and optimization on embedded systems running FreeRTOS

• Extensive experience with End-to-End testing on a connected device, which is connected to a mobile app and AWS backend.

• Strong understanding of what analytics can help improve user experience and provide product insights in the field.

• Hands-on experience with development and debugging using devkit and real devices.

• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent experience.

Preferred Skills:

• Experience with MQTT or other IoT communication protocols.

• Familiarity with testing and debugging for IoT hardware devices.

• Experience with mobile app integration.

• Familiarity with managing OTA to large device fleets.

• Familiarity with security practices for IoT devices, including encryption, secure boot, and anti-tampering.

• Familiarity with hardware interfaces and programming for flashing firmware to embedded devices.

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

Salary Range: $180,000-200,000

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.