Firmware Engineer III

Team: Platform

Location: Irvine, California

Commitment: Full Time

Workplace Type: onsite

Fluxergy is a rapidly growing in vitro diagnostics company innovating on the cutting-edge of laboratory testing. We’re developing the first and only multi-modal point-of-care platform that enables molecular, clinical chemistry, immunoassay, and hematology testing on the same system.  

Our platform spans many markets including the clinical, veterinary, and food safety industries. We are seeking self-motivated problem solvers who are excited to help decentralize traditional laboratory infrastructure.  

At the core of our company’s identity is a strong foundation in engineering. We take great pride in our commitment to critical thinking and pragmatic problem-solving through a modular and systemic perspective. We hold the conviction that transparent communication, coupled with the flexibility to adjust to evolving scenarios and the willingness to venture beyond familiar territories, is crucial to both our success and yours.  

Our product: https://vimeo.com/176673475 

We’re looking for an engineer who’s ready to level up—not just in skill, but in impact. This role is built for someone who enjoys solving complex, not-fully-defined problems and wants to play an active part in shaping the product. You’ll be working on a system that’s evolving in real time, where your ideas and contributions directly influence what gets built and how it performs. 

You thrive in collaborative environments where ownership is shared, ideas are challenged, and progress happens as a team. You’re naturally curious, comfortable with ambiguity, and motivated by building something meaningful—not just maintaining it. If you enjoy turning complexity into clarity and want to grow alongside a team tackling hard problems together, you’ll feel right at home here. 

What You Will Do

Develop, test, and release firmware for embedded and IoT-based systems

Ensure firmware reliability, performance, and quality across all stages of development

Bring up, verify, and debug new hardware systems, including the Fluxergy Analyzer

Collaborate with cross-functional teams to support system integration and troubleshoot issues

Identify, analyze, and resolve bugs or system-level challenges as they arise

Design and improve intra-device communication interfaces (UART, SPI, I2C)

Explore and implement new methodologies to enhance existing features, backed by data-driven analysis

Participate in code reviews across teams and contribute to engineering best practices

Create and maintain clear, thorough technical documentation

Build internal tools to support development, testing, and team efficiency

Be an awesome team member (see team culture bullets above).   

What You'll Need to Have

5+ years developing and releasing firmware for embedded or IoT devices

Familiarity with embedded Linux, Yocto, and at least one RTOS

Proficiency in C (C98) and C++ (C++11)

Experience with bring-up, verification, and troubleshooting of embedded systems

Ability to design and improve communication protocols like UART, SPI, and I2C

Willingness to experiment, iterate, and apply quantitative analysis to improve systems

Ability to work effectively across teams and clearly document and share work

Comfort navigating ambiguity and tackling unforeseen challenges in a system built from the ground up

Background in medical devices or similar industries is highly valued 

Strong plus if you: 

• Have worked on an FDA regulated project 

• Are familiar with safety critical design processes and controls 

• Ability to read schematics 

Our interview processes my differ slightly from role-to-role; however, most of our interviews will follow a similar pattern: 

- Recruiter Interview  

- Hiring Manager interview  

- Technical Interview

- On-site Interview

- Decision    

We are an early-stage company and may change our interview process from time-to-time, but our hope is everyone who interviews with us has a positive experience, even if an offer isn’t presented.  

Excellent Medical/Dental Benefits 

- 95% medical benefit premiums paid by Fluxergy and covers employee, partner, and dependents 

- 100% dental and vision premiums paid for employee, partner, and dependents 

- 100% Life Insurance premiums paid for the employee  

Work - Life Balance Minded Time Off  

- 15 paid vacation days  

- 2-week paid winter break  

- 7 company paid holidays  

- 5 paid sick days 

A Work Culture Which Believes in Promoting from Within

- Wear lots of hats / accelerate your career growth! 

- We are a flat organization by design – lots of visibility!   

- Many of our current leaders started their career with Fluxergy!    

Salary Range: $120,000 - $135,000/yr