Firmware​/Embedded Software Engineer - St. Louis, MO

Staff Firmware/Embedded Software Engineer - St. Louis, MO

The Staff Firmware Engineer serves as both a key contributor and technical leader in the architecture, design, development, testing, and deployment of firmware for high-volume embedded electronic products. This role is responsible for participating in project planning activities, reviewing and evaluating code and technical deliverables, and supporting product deployment by helping resolve customer technical issues. The engineer will also function as a technical expert when required and play an active role in driving complex design efforts, improving development processes, and mentoring engineering team members.

Key Responsibilities

• Architect, design, and implement embedded firmware in C for microcontroller-based systems.
• Develop and maintain firmware requirements, interface specifications, and state/behavior models.
• Create and execute unit, integration, and automated tests to ensure high reliability and functional correctness.
• Optimize firmware for performance, memory utilization, and power efficiency.
• Ensure designs comply with applicable regulatory standards such as FCC, UL, and ANSI.
• Serve as the technical lead for mid-complexity firmware initiatives.
• Mentor junior and mid-level engineers in architecture principles, design patterns, and embedded development best practices.
• Participate in and lead technical design reviews and code reviews.
• Support project planning through effort estimation, risk identification, and task definition.
• Contribute to structured firmware development processes, coding standards, and continuous improvement efforts.
• Perform root-cause analysis to resolve manufacturing, field, and deployment issues.
• Collaborate with cross-functional teams on system-level integration, validation, and troubleshooting.

Required Qualifications

• Bachelor’s degree - Computer Engineering, Electrical Engineering, Computer Science, or a related technical field.
• 7+ years of embedded systems development experience using C/C++.
• 5+ years of experience developing firmware in embedded RTOS environments.
• Strong understanding of ARM Cortex or similar microcontroller architectures.
• Proficiency with hardware interfaces such as SPI, UART, I²C, ADC/DAC, GPIO, and timers.
• Experience developing multi-threaded firmware and managing concurrency.
• Advanced debugging proficiency using oscilloscopes, logic analyzers, emulators, and JTAG tools.
• Experience with Git, defect-tracking systems, and CI/CD workflows.
• Strong communication skills with the ability to collaborate effectively across teams.

Preferred Qualifications

• Master’s degree in engineering or related technical discipline.
• Experience with RF/wireless technologies such as Wi-Fi, BLE, and Zig Bee.
• Understanding of networking protocols including IPv4/IPv6, TCP/UDP, CoAP, and MQTT.
• Experience with embedded security technologies, including encryption, secure boot, and key management.
• Background in smart grid, IoT, or utility industry systems.
• Experience performing structured root-cause analysis (e.g., 5 Whys, fishbone, 8D).
• Ability to develop internal tools, diagnostics, or automation scripts.
• Experience with Python and/or Rust programming languages

Physical Requirements

• Ability to perform standard office and laboratory work activities.
• Frequent sitting, standing, and hands-on test bench work.
• Minimal to no travel required.

Hubbell Incorporated

Hubbell creates critical infrastructure solutions that power our customers, communities, people and the planet. Our company is strategically aligned around enabling grid modernization and electrification. As more products plug in to an aging grid, Hubbell solutions enable the transition to a more reliable, resilient and efficient energy infrastructure. Founded in 1888 our innovation has made us a leading global manufacturer of high quality electrical and utility solutions enabling customers to operate critical infrastructure reliably and efficiently.

The company operates in two segments. Hubbell Utility Solutions (HUS) enable the grid to conduct, communicate and control energy across utility applications and Hubbell Electrical Solutions (HES) are essential to managing power across a wide range of industries and applications. Our vertical market solutions can be applied to markets including Data Centers, Renewables, Commercial Buildings, Industrial, Telecom and Transportation. Supporting both of our business segments is our corporate and Hubbell Unified Business Solutions teams that provide consistent process, tools technologies across our businesses.

We are committed to operating sustainably and ethically while promoting an inclusive and supportive culture for our people to grow and develop in their careers. Our employees proudly work and serve our communities from our headquarters in Shelton, CT, across the United States and around the globe.

Hubbell Utility Solutions

Hubbell Utility Solutions (HUS) enable the grid to conduct, communicate and control energy across utility…