Embedded Software Engineer - EID

Hiire; Almada; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Competitive pay

Flexible working

22 vacation days

Birthday off

Private health insurance

Job summary

EID is seeking 3 Software Engineers with a focus on security to design and build secure, high-assurance software across Windows, Linux, and RTOS environments.

The role involves developing C# desktop applications and low-level C/C++ for embedded platforms, with emphasis on security, integrity, and protected boot processes for mission-critical systems.

Qualifications

• Proficiency in C, C++ (Embedded) and C# at application level.
• Experience with Windows Visual Studio for C++ and .NET development.
• Experience with Embedded Linux and Yocto Project.
• Solid understanding of RTOS concepts.
• Knowledge of cryptographic libraries, secure communication protocols (TLS).
• Experience integrating high-level and low-level software.

Responsibilities

• Full-Stack Embedded Development across Windows, Linux, RTOS.
• Develop C# desktop apps for system monitoring and configuration.
• Harden Yocto-based Linux distributions.
• Develop firmware for RTOS with secure interfaces.
• Implement security controls such as encryption, Secure Boot, TPM/HSM.
• Ensure secure cross-platform communication between C# apps and embedded targets.

Skills

C

C++ (Embedded)

C# (Application level)

Visual Studio

Linux (Yocto)

RTOS concepts

Security concepts (TLS)

Tools

Visual Studio

Eclipse

Yocto Project

Job description

Hiire is supporting a leading Portuguese technology company operating in a highly specialized and regulated sector, recruiting a 3 Software Engineers with Security Focus to join its team. So if you don't check all the boxes, don't worry - the idea is to have all this knowledge as a team!

Company Overview

EID is a leading high-tech company based in Portugal, operating primarily in the Defence sector. With a strong track record anddeep expertise in electronics and communications, the company designs, manufactures, and supports advanced, high-performance solutions for complex and demanding environments.

Operating inhighly specialized markets, EID is driven by a continuous focus on innovation. Its growth is grounded in the ability to develop and deliver technologically advanced products tailored to meet specific customer needs.

At the core of EID’s success is its team ofhighly skilled professionals, with a strong concentration of engineers in electronics, software, and communications. Their expertise and experience play a key role in shaping the company’s capabilities and ongoing evolution.

What You’ll Do

We are looking for 3 versatile Software Engineers to work across the full stack of secure systems. This role is unique: you will develop high-level C# Desktop Applications for user interaction while building low-level, hardened C/C++ code for Linux (Yocto) and RTOS. You will play a key role in protecting mission-critical data.

Key Responsibilities:

• Full-Stack Embedded Development: Design and maintain secure C/C++ applications across Windows (Visual Studio), Linux (Eclipse), and RTOS;
• Modern User Interfaces: Develop robust C#/.NET desktop applications (WPF/WinForms) for system monitoring, configuration, and secure data visualization;
• System Hardening: Build and secure Yocto-based Linux distributions, ensuring a minimal attack surface and protected boot cycles;
• Low-Level Integrity: Design firmware for RTOS with a focus on memory protection, deterministic behaviour, and secure hardware interfacing (SPI, I2C, UART);
• Cyber-Security Implementation: Integrate security controls such as encryption (AES, RSA), Secure Boot, and Hardware Root of Trust (TPM/HSM);
• Cross-Platform Integration: Ensure seamless and secure communication between C# high-level applications and low-level embedded targets.

What You’ll Bring

• Languages: Proficiency in C, C++ (Embedded) and C# (Application level);
• Windows Ecosystem: Expert use of Microsoft Visual Studio for both C++ and .NET development;
• Linux & Yocto: Experience with Embedded Linux and the Yocto Project (BitBake);
• Low-Level/RTOS: Solid understanding of RTOS concepts (tasks, semaphores, ISRs);
• Security-First Mindset: Knowledge of cryptographic libraries, secure communication protocols (TLS), and vulnerability mitigation;
• IDEs: Proficient in Visual Studio and Eclipse-based environments.

Benefits

• Competitive compensation package aligned with experience.
• Flexible working solutions and a people-focused culture.
• 22 vacation days plus 2 additional company days.
• Day off on your birthday.
• Private health insurance.

If you’re excited about working on complex systems and contributing to innovative communication and network solutions, we’d love to hear from you.