Firmware Engineer III

Fluxergy; United States; On-site; USD 120,000 - 135,000; Full time

Benefits offered by this job

Excellent Medical/Dental Benefits

15 paid vacation days

2-week paid winter break

7 company paid holidays

5 paid sick days

Career growth opportunities

Job summary

Fluxergy, a rapidly growing in vitro diagnostics company, seeks an engineer to level up in impact and shape product decisions. You will write firmware for embedded and IoT devices, troubleshoot complex issues, and collaborate across teams to improve system performance.

You’ll work on a real-time evolving platform, contribute to design reviews, and help build robust diagnostics hardware. A strong emphasis on ownership, ambiguity handling, and clear documentation defines the role.

Qualifications

• 5+ years developing and releasing firmware for embedded or IoT devices.
• Experience with embedded Linux, Yocto, and at least one RTOS.
• Proficiency in C and C++ (C98/C++11).
• Experience with bring-up, verification, and troubleshooting of embedded systems.
• Ability to design and improve UART, SPI, and I2C protocols.

Responsibilities

• Develop, test, and release firmware for embedded and IoT-based systems.
• Ensure firmware reliability, performance, and quality across development stages.
• Bring up, verify, and debug new hardware systems, including the Fluxergy Analyzer.
• Collaborate with cross-functional teams for system integration and issue resolution.
• Identify and resolve bugs or system-level challenges as they arise.
• Design and improve intra-device communication interfaces (UART, SPI, I2C).
• Explore and implement new methods to enhance features with data-driven analysis.
• Participate in code reviews and contribute to engineering best practices.
• Create and maintain clear technical documentation.
• Build internal tools to support development, testing, and team efficiency.
• Be an awesome team member and contribute to a productive culture.

Skills

Firmware development

Embedded Linux

C

C++

RTOS

UART/SPI/I2C

Bring-up & debugging

Job description

About Us

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

About the Role

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.

Team culture:

• Positive
• Proactive
• Accountable
• Team oriented
• Continuous learner
• Great communicator
• Build strong working relationships
• Contribute to a productive team culture

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

Interview Process

• Recruiter Interview
• Hiring Manager interview
• Technical Interview
• On-site Interview
• Decision

Benefits

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

Additional Information

Fluxergy is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, marital status, age, disability, national or ethnic origin, military service status, citizenship, or other protected characteristic.

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