For our client, we are currently looking for an experienced Senior C++ Engineer (m/f/d) to support the further development and modernization of two complex desktop applications in a technically demanding environment. The focus of the project is on enhancing application performance, modernizing legacy components, and ensuring a stable and scalable software architecture. One of the applications is based on C++ and Java, while the other combines C++ and Visual Basic. Your main responsibilities include: - Development and maintenance of high-performance C++ desktop application components - Analysis and optimization of application performance, runtime behavior and scalability - Design and implementation of multithreaded and concurrent software components - Modernization and migration of legacy technologies to modern C++ and current .NET environments - Integration and maintenance of desktop application frameworks and third-party components - Close collaboration with software architects, QA engineers and product management to deliver high-quality solutions - Support the use of AI-assisted development tools (e.g. Claude Code) for code analysis, refactoring and software modernization

must-have: -Several years of professional experience in modern C++ software development -Good knowledge of Java and/or Visual Basic -Experience integrating frameworks such as Qt or CEF -Hands-on experience with CMake, Conan and MSVC -Solid experience in performance analysis, debugging and optimization of desktop applications -Fluent English (written and spoken) is required and German language skills are considered a plus nice-to-have: -Practical experience with AI-supported development tools such as Claude Code or similar coding agents -Experience modernizing legacy applications (e.g. MFC, ATL, Win32 or Delphi) Umfeld: C++, C++17, C++20, Multithreading, Concurrency, Performance Optimization, Desktop Applications, CMake, Conan, MSVC, Qt, CEF, MFC, ATL, Win32, Delphi, .NET, AI Coding, Claude Code, Legacy Modernization, Java, Visual Basic

Kirsten Wiehle

kirsten.wiehle@contractor.de

+49 89 41 61 716 - 32