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Senior Firmware Engineer

Job in O'Fallon, St. Charles County, Missouri, 63366, USA
Listing for: True Manufacturing
Full Time position
Listed on 2026-06-02
Job specializations:
  • Engineering
    Embedded Software Engineer, Systems Engineer
Salary/Wage Range or Industry Benchmark: 125000 - 150000 USD Yearly USD 125000.00 150000.00 YEAR
Job Description & How to Apply Below

Overview

True’s hardware portfolio spans the gamut from embedded controls, smart LED lighting, low power designs, all the way up to complex RTOS based cellular modems. The Senior Firmware Engineer is responsible for the development and maintenance of embedded firmware ranging from 8-bit systems to 32-bit RTOS designs. As a Senior Firmware Engineer, it is expected to be able provide mentorship to team members.

Responsibilities

Essential Duties and Responsibilities
:

  • Develop firmware against system requirements for embedded systems applied to refrigeration products.
  • Develop, maintain and improve algorithms and firmware for embedded systems.
  • Documents firmware by producing flow charts, state machines, and drawings.
  • Collaborate with the embedded team to drive changes and requirements on the hardware side.
  • Develop and manage project schedules related to new and existing product design.
  • Review the overall progress of each project and provide the department manager with a detailed monthly progress report, ensuring on-time project completion.
  • Create a positive work atmosphere and attitude, level of cooperation and general leadership to provide a positive influence.
  • Participate within cross functional teams to launch products, resolve issues, and support product improvements.
  • Verification and validation of test plans and execution.
  • Supply technical support to the Service Department when needed.
  • Coordinate project work internally with the department and externally with other departments to ensure on-time completion of projects within budget.
  • All other duties as assigned.
  • Regular and reliable attendance in the office is required.
Qualifications
  • Bachelor’s degree in electrical engineering, computer science or similar field required.
  • Ten or more years of related experience (embedded firmware development) required.
  • Atmel or Microchip 8-bit experience.
  • Knowledge of real time peripherals such as timers, buffers, and UARTs.
  • MODBUS and i2C experience required.
  • ARM 32bit experience.
  • Wireless Stack (WiFi, BLE, or RF) experience required.
  • Firmware development (8-, 16-, 32-bit, ARM Cortex-M microcontrollers) and debugging.
  • STM
    32 experience preferred.
  • KEIL or IAR experience preferred.
  • PCB design including schematic capture and board layout experience preferred.
  • Solid working knowledge of C/C++ preferred.
  • Experience in programming real-time systems with or without RTOS.
  • Experience with EDC/EDM hardware design and simulation (Solid Works PCB, Altium, Cadence).
  • Demonstrate ability reading hardware schematics and using common debugging tools including scopes, logic analyzers, emulators, and signal generators.
  • Enjoy being hands on in the lab and want to be in the details (soldering, oscilloscopes).
  • Familiar with NI data acquisition equipment as well as Lab View.
  • Knowledge of IoT and wireless technology.
  • Knowledge of new sensor technology.
  • Knowledge or experience with thermoelectric devices a plus.
  • Ability to organize work to meet the departmental goals and objectives.
  • Highly developed interpersonal skills.

The hours for this position are 7:30am - 4:00pm, Monday through Friday.

We are proud to be an Equal Opportunity Employer.

Company-paid background check required upon hire.

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Position Requirements
10+ Years work experience
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