C++ Software Engineer for Mature Desktop App (Hybrid, Lisbon)

act digital; Lisboa; Hybrid; EUR 50,000 - 80,000; Full time

Job summary

act digital is seeking a C++ Software Engineer to evolve a desktop application built with C++20 and Qt. You will contribute to design, implementation, and maintenance in a large, long-lived codebase, focusing on stability and incremental improvements.

Contribute to Linux-based development, CI/CD workflows, and automated tests, while collaborating through Git and code reviews. 50% on-site in Lisbon supports a hybrid work model.

Qualifications

• Professional experience developing software in C++.
• Knowledge of modern C++ design principles, including resource ownership, move semantics, const-correctness, and effective use of the Standard Library.
• Experience creating maintainable, testable code and designing software components, APIs, or architecture.
• Strong debugging, analytical, and problem-solving skills.
• Experience with automated unit testing frameworks such as Catch2, Google Test, Boost.Test, or equivalent.
• Experience with Linux development, Git workflows, and CMake.
• Experience working with large, established or legacy codebases while maintaining product stability.
• Confidence communicating technical concepts in English, both written and spoken.

Responsibilities

• Design and implement maintainable software components, APIs, and system architecture.
• Develop and debug applications on Linux, using the command line and common development tools.
• Maintain and improve CMake-based builds.
• Write and maintain automated unit tests.
• Participate in Git-based collaboration and constructive code reviews.
• Work pragmatically in a large, long-lived codebase, improving quality without unnecessary rewrites.
• Investigate complex technical problems and drive them through to resolution.

Skills

C++ development

Modern C++

Unit testing

Linux development

Git/CMake

Code reviews

Debugging

English communication

Tools

Catch2

Google Test

Boost.Test

Job description

act digital is seeking a C++ Software Engineer to evolve a desktop application built with C++20 and Qt. You will contribute to design, implementation, and maintenance in a large, long-lived codebase, focusing on stability and incremental improvements.

Contribute to Linux-based development, CI/CD workflows, and automated tests, while collaborating through Git and code reviews. 50% on-site in Lisbon supports a hybrid work model.