Senior Embedded Firmware Engineer

AVANCEESoftware; Leiria; On-site; EUR 55,000 - 75,000; Full time

Job summary

AVANCEESoftware in Portugal is seeking a Senior Embedded Firmware Engineer to develop and maintain reliable firmware across its lifecycle, combining hands-on coding with architecture and hardware collaboration.

You will work with RTOS, microcontrollers (ARM/ESP32), security features, and cross‑functional teams, mentoring peers, improving development practices, and ensuring clear documentation. Excellent English communication and budgeting mindset are encouraged.

Qualifications

• Bachelor’s or Master’s in Computer Science or Computer Engineering.
• 5+ years embedded development, C/C++ proficiency.
• RTOS experience and hardware interface familiarity.
• MQTT, Ethernet, I2C, RS232, RS485 and SPI experience.
• Embedded cybersecurity incl. encryption and cert mgmt.
• Experience using AI-assisted tools to write and review firmware.
• Strong documentation and code-review discipline.
• Fluent in English with good communication.

Responsibilities

• Develop and maintain reliable embedded firmware, from system architecture to hardware integration.
• Debug firmware and hardware interfaces, resolve issues and validate fixes with hardware engineers.
• Improve code quality and long-term maintainability through code reviews, refactoring and clear technical documentation.
• Implement embedded security measures and ensure compliance with applicable regulations.
• Plan and manage engineering projects, working across teams to deliver product improvements.
• Mentor team members and improve development practices as technologies evolve.

Skills

C/C++

RTOS

Embedded development

English fluency

Code reviews

Documentation

Project budgeting

Education

Bachelor's or Master’s degree in Computer Science or Computer Engineering

Tools

ARM

ESP32

Silicon Labs

Zephyr RTOS

MQTT

Ethernet

I2C

RS232

RS485

SPI

Job description

WHO WE ARE LOOKING FOR

We are looking for a Senior Embedded Firmware Engineer to develop and maintain reliable embedded products throughout their lifecycle. You will combine hands-on firmware development with architecture, troubleshooting and collaboration with hardware engineers.

KEY RESPONSIBILITIES

• Develop and maintain reliable embedded firmware, from system architecture to hardware integration.
• Debug firmware and hardware interfaces, resolve issues and validate fixes with hardware engineers.
• Improve code quality and long-term maintainability through code reviews, refactoring and clear technical documentation.
• Implement embedded security measures and ensure compliance with applicable regulations.
• Plan and manage engineering projects, working across teams to deliver product improvements.
• Mentor team members and improve development practices as technologies evolve.

REQUIRED QUALIFICATIONS

• Bachelor’s or master’s degree in Computer Science, Computer Engineering or an equivalent field.
• More than five years of embedded development experience, with proficiency in C or C++ and familiarity with microcontrollers or microprocessors.
• Experience with real-time operating systems (RTOS) and hardware interfaces.
• Experience with MQTT, Ethernet, I2C, RS232, RS485 and SPI.
• Experience implementing embedded cybersecurity, including encryption and certificate management.
• Experience using AI-assisted development tools to write, debug, test and review firmware, with the ability to critically validate generated code.
• Experience conducting code reviews, maintaining technical documentation and collaborating with hardware engineers.
• Experience with project budgeting, cost estimation and scheduling.
• A proactive, creative approach, strong teamwork and interpersonal skills, excellent communication skills, and fluency in English.

PREFERRED QUALIFICATIONS

• Experience with ARM, ESP32 and/or Silicon Labs technologies
• Experience developing firmware using Zephyr RTOS