Intermediate Embedded Firmware Engineer — Power Electronics

Job Posting: Intermediate Firmware Engineer

Job Type: Full-time, on-site preferred

Company: Equinox Power Innovations

Location: Burnaby, British Columbia

About Equinox Power

Equinox Power Innovations is a Burnaby, BC engineering company building advanced communications power electronics for outdoor, harsh-environment applications. Our product lines include Uninterruptible Power Supply (UPS) and Fault-Managed Power Systems (FMPS) for the telecom, cable-broadband, data-centre and critical-infrastructure markets. We design digitally-controlled AC-DC, DC-DC, DC-AC and AC-AC converters from concept through certified, high-volume production, with a focus on modular, scalable architectures and 95%+ energy efficiency. The team has roots going back to the Founder’s pioneering work on cable-ackup power in the 1970s, and brings a combined 150 years of communications and power-electronics experience. Equinox is a pre-revenue, funded engineering company — small, deliberate, and building for products that ship at commercial scale.

Position Overview

We’re adding an Intermediate Embedded Firmware Engineer to support our power-electronics team. You’ll write and maintain C firmware for bare-metal ARM Cortex-M microcontrollers (primarily the STM32 family) that runs inside our UPS and FMPS products — PWM generation, ADC pipelines, current and voltage control loops, power-up and fault-state sequencing, and communication with the rest of the system over SPI, I²C, CAN and RS-485. You’ll provide the firmware that our power-electronics engineers need during hardware bring-up and debug, and you’ll test your code in an Agile team environment. You’ll work next to the hardware on the bench, with scopes, electronic loads and JTAG/SWD debuggers, and you’ll help with UL / CSA / NEBS / FCC / CE certification testing where firmware behaviour is part of the compliance
picture.

This is a great opportunity for someone to work in a small early-stage company where you will have the chance to contribute to innovative projects and learn and grow with other like-minded experienced engineers.

Duties and Responsibilities

• ‍‍Write, document and maintain C firmware libraries for our digitally-controlled AC-DC, DC-DC, DC-AC and AC-AC converters in the 1 kW–30 kW range.
• Implement real-time control code: current and voltage loops, PWM generation, ADC sampling and scaling, state sequencing for soft-start, steady-state operation and fault
  handling.
• Provide firmware and debugging support during new-board bring-up: power-on, peripheral validation, safe first-switching, closed-loop commissioning, and debug of
  switching-related anomalies.
• Work with our power-electronics engineers on signal conditioning, sensing, gate drive and protection so the firmware behaves correctly across line, load, temperature and fault
  corners.
• Implement and integrate SPI, I²C, CAN, RS-485 and similar interfaces to other boards and host controllers.
• Write and run firmware tests (unit, integration and on-target) as part of an Agile development process; help keep the team’s build and CI flow healthy.
• Support prototype validation and certification testing (UL, CSA, NEBS, FCC, CE) where firmware behaviour is part of the compliance argument.
• Use PSIM / PLECS / LTSpice / MATLAB / Simulink models from the analog team to validate control behaviour against the real hardware.
• Keep the firmware maintainable: version-controlled (Git), reviewed, documented and usable by the rest of the team.

Required Qualifications

• Bachelor’s degree in Electrical or Computer Engineering, or equivalent practical experience.
• 2–4 years of bare-metal firmware development in C on ARM Cortex-M microcontrollers, preferably STM32.
• Able to read a schematic and reason about amplifiers, filters, analog front-ends, switching and linear regulators, level-shifters and simple power stages.
• Hands-on lab comfort with oscilloscopes, logic analyzers, electronic loads and JTAG/SWD debuggers.
• Working knowledge of at least one of SPI, I²C, CAN or RS-485 at the register-and-frame level.
• Solid debugging habits: reproduce, isolate, hypothesize, measure, fix, write it down.
• Comfortable working in Git and in an Agile / code-review environment.
• Legally authorized to work in Canada and able to work on-site (or predominantly on-site) at our Burnaby, BC office.

Nice to Have

• Firmware experience on AC-DC / DC-DC / DC-AC converters, or on other switching-power products.
• Exposure to control theory (PI/PID tuning, basic Bode/stability analysis).
• DSP fundamentals: digital filtering, fixed-point arithmetic, precision issues.
• ISR design, priority handling, resource locking and other concurrent-programming basics.
• Familiarity with EMC-driven firmware constraints (FCC / CE).
• STM32CubeIDE and / or Visual Studio Code as a day-to-day C environment.
• Familiarity with STM32MP1 / STM32MP2 (the Cortex-A side we run Linux on), or with historical TI processor families (C2000, Sitara, MSP).
• Experience with firmware testing frameworks, unit-test harnesses or hardware-in-the-loop test benches.
• Any exposure to UL, CSA, NEBS, FCC or CE certification testing.
• Fluency with modern AI developer tools — for example code assistants (Copilot / Cursor), chat-based design exploration, and automated test / spec generators — and a clear view on where they actually help on embedded firmware work.

What We Have to Offer

• Competitive compensation and benefits.
• Reporting directly to the CIO in a small-team engineering environment fostering collaboration.
• Accelerated professional growth and development through working on leading-edge products that will ship at scale into telecom, cable-broadband, data-centre and critical-infrastructure applications.

Salary Range: $90,000 to $110,000 per year

How to Apply

Send a resume and a short cover letter to info@equinoxpowerinc.com with the subject line “Intermediate Software Engineer”. Equinox Power Innovations is an equal-opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.