Firmware Engineer

Smart Energy LAB; Lisboa; Hybrid; EUR 42,000 - 56,000; Full time

Job summary

A leading energy innovation company in Lisbon seeks a Firmware Engineer to develop and optimize high-level firmware applications for embedded systems. You will collaborate with cross-functional teams and leverage your expertise in Linux environments. This full-time role allows hybrid working, requiring you to be in office three days a week. The position is contracted until June 2026 with potential renewal.

Qualifications

• 3+ years of hands-on experience in a relevant position.
• Proficiency in Python/Shell for firmware applications.
• Experience in high-level applications for IoT.
• Experience with Linux-based environments and compute modules (CM4).
• Experience with ESP32 and firmware in C++ or Rust.
• Knowledge of MQTT, UART, SPI, I2C.
• Familiar with Modbus and EV charging protocols (OCPP) a plus.
• Hybrid work in Lisbon; 3 days in the office.

Responsibilities

• Develop and optimize high-level firmware applications.
• Design application software for complex embedded systems.
• Collaborate with hardware and software teams.
• Develop and maintain system-level architecture documentation and software specifications.
• Troubleshoot and debug firmware applications to ensure seamless operation of hardware-software systems.

Skills

Firmware development

Embedded systems

Linux-based environments

C++

Debugging skills

Communication interfaces

MQTT

WebSockets

UART

SPI

I2C

Education

Masters in Electrical and Computer Engineering

Tools

ESP32

Platform.io

WebSockets

Job description

If you want to be part of the new decade on energy revolution, at Smart Energy LAB you will have the opportunity to have a real impact by creating new products and services that will contribute to energy transition, focusing on the 3Ds (Decarbonization, Decentralization and Digitalization).

Smart Energy LAB is a Collaborative Laboratory (CoLAB) held by EDP Comercial, Accenture, Instituto Superior Técnico, Faculty of Sciences of Lisbon, University of Coimbra, INESCTEC and INESC ID.

Smart Energy Lab has a unique combination of science, technology and industry in the energy sector, focused on creating new products and services for the downstream of the energy value chain.

"We are a green dream factory that will make tomorrow possible, improving life for everyone with new energy solutions through smart collaboration."

Firmware Engineer

As a Firmware Engineer you will perform tasks such as:

• Develop and optimize high-level firmware applications for compute modules
• Design application software to support complex embedded systems, leveraging Linux OS environments.
• Collaborate with cross‑functional teams, including hardware engineers, software developers, and project managers.
• Develop and maintain system‑level architecture documentation and software specifications.
• Troubleshoot and debug firmware applications to ensure seamless operation of hardware‑software systems.

What are we looking for:

• Preferred background in Electrical Engineering, Electronics Engineering (i.e. Masters in Electrical and Computer Engineering).
• Experience in firmware development, particularly high‑level applications for embedded systems, for IoT applications and their cloud integrations.
• Proficiency in working with Linux-based environments and compute modules (e.g., CM4), with languages such as Python/Shell to complement or develop firmware applications.
• Hands‑on experience with ESP32, including firmware development using C++, Rust or similar, and also with wireless communication protocols (e.g., Wi‑Fi, Bluetooth).
• Understanding of communication interfaces (e.g., UART, SPI, I2C, MQTT).
• Experience with system‑level design and integration of embedded hardware and software.
• Knowledge of WebSockets, firmware development bootstrapping from platform.io
• Knowledge of Modbus, EV charging protocol (OCPP) is a plus.
• Debugging and troubleshooting skills in embedded systems.
• The opportunity is Hybrid and so candidate must reside in Lisbon. Would involve 3 days per week working in the office.

Specific skills required:

• 3 or more years of hands‑on experience in a relevant position
• Portuguese tax number required

Location: Lisbon, Portugal

Contract until June 2026, with possibility to renew thereafter.

Seniority level

Associate

Employment type

Full‑time

Job function

Engineering and Information Technology

Industries

Research Services