Senior C++ Desktop Applications Engineer (Qt/C++20)

act digital; Porto; On-site; EUR 40,000 - 70,000; Full time

Job summary

act digital is seeking experienced C++ Software Engineers to evolve a large, business-critical desktop application built with C++20 and Qt. The role involves understanding a long-lived codebase, adding capabilities, solving complex issues, and modernizing the platform while preserving stability for users.

You will work on Linux, use CMake, implement automated tests, and participate in architectural discussions.

Qualifications

• Professional software development experience using C++.
• Strong understanding of Modern C++ design principles.
• Experience with Resource ownership, Move semantics, Const-correctness, Standard Library, Maintainable and testable code.
• Experience designing software components, APIs, or system architecture.
• Strong debugging and problem-solving capabilities.
• Experience developing automated tests using: Catch2, Google Test, Boost.Test Or equivalent frameworks.
• Experience participating in code reviews.
• Familiarity with Git-based workflows.
• Experience developing and debugging applications on Linux.
• Confidence using the Linux command line.
• Hands-on experience with CMake.
• Experience working with large, long-lived, or legacy codebases.
• Good written and verbal communication skills in English.

Responsibilities

• Develop and evolve desktop software using Modern C++.
• Design maintainable software components, APIs, and system capabilities.
• Understand and improve a large, established codebase.
• Modernize legacy components without introducing unnecessary risk.
• Build reliable automated tests and improve test coverage.
• Troubleshoot complex software issues in Linux environments.
• Participate actively in code reviews and architectural discussions.
• Improve software quality, maintainability, performance, and long-term sustainability.
• Develop new features for a substantial desktop application.
• Maintain and improve existing user-facing and system-level components.
• Develop and maintain concurrent or multi-threaded application components.
• Use CMake to configure, build, and maintain software projects.
• Investigate complex application defects and unexpected behavior.
• Take ownership of problems through to resolution.

Skills

C++

Modern C++

Qt framework

Linux debugging

CMake

Git workflows

Automated testing

Code reviews

GTest

Catch2

Google Mock

Tools

CMake

Git

Catch2

Google Test

Boost.Test

Trompeloeil

Job description

act digital is seeking experienced C++ Software Engineers to evolve a large, business-critical desktop application built with C++20 and Qt. The role involves understanding a long-lived codebase, adding capabilities, solving complex issues, and modernizing the platform while preserving stability for users.

You will work on Linux, use CMake, implement automated tests, and participate in architectural discussions.