Our client is looking for a

Sr. Firmware Developer

to take ownership of product firmware, features, and the full lifecycle across microcontroller-based products.

Permanent / Full-Time Onsite in Mississauga Overview: A hands‑on development role focused on bare-metal embedded firmware development, hardware/software integration, and delivering production‑ready firmware from concept through field support. The successful candidate will bring strong C/Embedded C experience, deep microcontroller expertise, and the ability to independently drive firmware architecture, development, debugging, validation, and release.

This is more than a coding role — you’ll take ownership of firmware outcomes, working closely with electrical, software, manufacturing, quality, product, and service teams to deliver reliable products.

Responsibilities:

Firmware Ownership: Take ownership of firmware development, implementation, verification, release, and ongoing maintenance for assigned products or product platforms.

Embedded Firmware Development: Develop robust embedded firmware primarily in C/Embedded C, including low-level drivers, hardware abstraction layers, control logic, state machines, communication handlers, diagnostics, and fault‑handling functionality.

Hardware Integration & Debugging: Support hardware bring‑up, prototype validation, production launch, and field investigations. Use oscilloscopes, logic analyzers, protocol analyzers, multimeters, signal generators, and JTAG/SWD debuggers to identify and resolve complex hardware and firmware issues.

Product Development: Translate product and system requirements into clear firmware designs, modules, interfaces,



and testable deliverables while making technical decisions around timing, peripherals, communication interfaces, diagnostics, and firmware updates.

Verification & Testing: Create and execute firmware test strategies, validation plans, bench‑level testing, regression testing, and verification activities to ensure stable, production‑ready releases.

Release Management: Support firmware release documentation, version control, build artifacts, release notes, and traceability between requirements and validation results.

Root Cause Analysis: Investigate field issues, intermittent system faults, communication failures, sensor and actuator issues, resets, watchdog events, and other system‑level problems using structured troubleshooting techniques.

Cross‑Functional Collaboration: Work closely with electrical, software, manufacturing, quality, product, and service teams to resolve technical issues and support successful product delivery.

Continuous Improvement: Improve firmware architecture, code quality, validation practices, debugging efficiency, product reliability, and long‑term maintainability across product generations.

Mentorship: Share technical knowledge and mentor junior and intermediate engineers on firmware design, debugging techniques, coding practices, and product ownership.

Must Haves:





8+ years of professional embedded firmware development

experience, with strong hardware/software debugging experience

Solid C / Embedded C programming

experience, with

C++ experience

considered an asset

Strong hands‑on experience developing

bare‑metal firmware for microcontrollers

Experience with low‑level drivers, interrupts, state machines, hardware interfaces, and embedded control logic

Strong understanding of common microcontroller peripherals such as GPIO, timers, ADC, PWM, UART, SPI, I2C, and CAN

Strong hands‑on hardware/firmware debugging experience, including the use of oscilloscopes, logic analyzers, multimeters, and JTAG/SWD debuggers

Experience with

Git or similar version control systems

Experience with firmware testing, version control, code reviews, and release processes

Bachelor’s degree in Electrical Engineering, Computer Engineering, Software Engineering, Computer Science, or equivalent technical discipline

Nice to Haves:

Python scripting experience

Experience with CI/CD pipelines, static analysis, unit testing, and code coverage tools

Experience mentoring junior/intermediate firmware engineers

Experience with STM32, NXP, Microchip, TI, Renesas, Nordic, ESP32, or similar microcontroller platforms

Experience with Visual Studio Code, Eclipse, MPLAB X, or STM32CubeIDE

Experience with CAN/CANopen, RS-485, Modbus, USB, Ethernet/TCP-IP, or MQTT

Experience with FreeRTOS, ThreadX, or Zephyr

Disclaimer: AI may be used in evaluating candidates.

This posting is for an existing vacancy.

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📌 Sr. Firmware Developer x2 (Winnipeg)
🏢 S.I. Systems
📍 Winnipeg