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Firmware Engineering Intern

EngineeringOn-Site β€” Maryland Heights, MissouriInternship25/hr
Students welcome

About the role

We're looking for a firmware engineering intern to own the code that makes our products work β€” the embedded software running on the microcontrollers at the heart of everything we build. You'll write it, test it on real hardware, and see it come to life in a product people actually use.

This role is what you make of it. We're looking for a self-starter who can take the reins and run without hand-holding β€” someone who will make the position their own and help shape the future of our firmware and embedded systems as we grow. We'll give you real ownership and trust; we expect you to run with it.

We're hiring for the long term. We want someone who can grow with us and step into a permanent, senior role as the company scales.

What you'll do

  • Write, test, and debug firmware for the microcontrollers that run our products (embedded C/C++)
  • Bring up new hardware β€” get sensors, displays, radios, and other peripherals talking over I2C, SPI, UART, and similar
  • Build and improve product features, then validate them on real hardware and iterate
  • Debug with oscilloscopes, logic analyzers, and serial output β€” track issues down and fix them
  • Work closely with our electrical and mechanical team to integrate firmware into the full product
  • Help shape how we build, version, and document firmware as we grow (Git and good habits)
  • Contribute to firmware for both existing products and new prototypes

What you'll bring

Above all, we care about attitude and initiative. If you're a self-starter with a great attitude β€” someone who can take a problem and run with it, a genuine team player, and eager to learn β€” you'll thrive here.

  • A self-starter who takes initiative and works independently β€” we'll hand you ownership, not step-by-step direction
  • Hands-on experience programming microcontrollers (Arduino, ESP32, STM32, PIC, or similar) β€” school, club, or - personal projects count
  • Solid programming fundamentals in C or C++
  • Real projects you've built β€” we want proof you've made things work on hardware (a portfolio or GitHub strongly preferred)
  • Currently pursuing or recently completed a degree in Computer, Electrical, or Software Engineering (or a related field, or equivalent hands-on experience)
  • A great attitude, strong work ethic, and eagerness to learn and adapt

Nice to have

  • Experience with embedded communication protocols β€” I2C, SPI, UART, BLE/Wi-Fi
  • Comfort reading datasheets and schematics and working close to the hardware
  • Debugging with oscilloscopes and logic analyzers
  • Version control with Git, and some RTOS or bare-metal experience
  • Familiarity with tools like PlatformIO or the ESP IDF toolchain

Apply for this position

- Hours: Part-time, up to 30 hours/week β€” flexible around a class schedule - Pay: $25/hr - Location: On-site in Maryland Heights, Missouri β€” you'll be working hands-on with our hardware and team - Opportunity: We're hiring with the future in mind β€” this role is built to grow into a permanent, full-time position for the right person

Are you legally authorized to work in the United States? *
Will you now or in the future require sponsorship for employment visa status (e.g., H-1B)? *

Innovative Timing Systems is an equal opportunity employer and welcomes applicants from all backgrounds.