INTERNSHIP 2027 – Software Engineer C++

• Design, develop and test software components in C++; 

• Analyze existing code, execution flows and technical architectures; 

• Improve the robustness, readability, performance and maintainability of existing solutions; 

• Contribute to low-level development and algorithmic topics; 

• Enhance monitoring, diagnostics and troubleshooting capabilities; 

• Work on programming language features, compilers or static analysis mechanisms; 

• Collaborate closely with software engineers, architects and product experts; 

• Document your approach and present your findings and solutions to technical stakeholders. 

A glimpse of the topics you could work on: 

Our interns contribute to a variety of technical initiatives across the Software Engineering perimeter. 

The topics you could work on include: 

• The evolution of observability capabilities within the MX.3 platform, including the implementation of consistent metrics, logs and traces; 

• The adoption of modern instrumentation standards such as OpenTelemetry; 

• The propagation of contextual information across execution flows; 

• The development and evolution of proprietary programming languages used within MX.3; 

• The implementation of new language features, including stronger static typing mechanisms; 

• Semantic analysis and compiler improvements designed to detect inconsistencies before execution; 

• Monitoring, troubleshooting and diagnostic tools supporting platform reliability; 

• Improvements to software quality, maintainability and developer experience. 

Each internship assignment is built around a real technical challenge and provides hands-on exposure to software engineering within the capital markets technology industry. 

Your profile / Who you are ? 

• Final-year student from an Engineering School or equivalent Master’s degree in Computer Science, Software Engineering or a related field; 

• Good programming skills in C++ and a strong interest in complex software systems; 

• Interested in low-level development, algorithms and challenging technical topics; 

• Curious, analytical and eager to understand how software components interact; 

• Strong problem-solving skills; 

• Team-oriented, with a proactive and autonomous mindset; 

• Good communication and documentation skills; 

• Fluency in English is required. 

Why joining us ? 

This internship offers a unique opportunity to contribute to the development of a large-scale software platform used by financial institutions worldwide. 

You will tackle concrete engineering challenges, strengthen your C++ development skills, gain exposure to areas such as observability, static analysis or compiler design, and grow alongside experienced software engineers in an international and multicultural environment where learning is part of everyday life. 

Additional Information 

• Location: Paris, France 

• Duration: 6 months