INTERNSHIP 2027 – Software Engineer C++

Murex; Paris; On-site; EUR 12,000 - 18,000; Full time

Job summary

Murex is seeking an enthusiastic engineering student for a 6‑month internship in Paris. You will contribute to the MX.3 platform, designing, developing, and testing C++ components in a challenging financial software environment.

You will explore low‑level development, languages, compilers, observability and diagnostics while gaining hands‑on experience with a large, globally used platform and collaborating with experienced engineers in an international setting.

Qualifications

• Final-year student from an engineering school or equivalent Master’s degree in Computer Science, Software Engineering or related field.
• Strong programming skills in C++ and interest in complex software systems.
• Interest in low‑level development, algorithms and challenging technical topics.
• Curious, analytical and eager to understand how software components interact.
• Strong problem‑solving skills; proactive and autonomous mindset.
• Good communication and documentation skills; fluent in English.

Responsibilities

• Design, develop and test software components in C++.
• Analyze existing code, execution flows and technical architectures.
• Improve 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 with software engineers, architects and product experts.
• Document your approach and present findings and solutions to technical stakeholders.

Skills

C++

Low-level development

Algorithms

Software systems

Education

Engineering/Master's in CS or Software Eng

Job description

Murex is a global fintech leader in trading, risk management and processing solutions for capital markets.

Operating from our 19 offices, 3 400 Murexians from over 65 different nationalities ensure the development, implementation and support of our platform which is used by banks, asset managers, corporations and utilities, across the world.

Join Murex and work on the challenges of an industry at the forefront of innovation and thrive in a people-centric environment. You’ll be part of one global team where you can learn fast and stay true to yourself.

Team & Context

At Murex, Software Engineers design, develop and maintain the technologies that power the MX.3 platform, used by financial institutions worldwide.

Our C++ engineers work on technical components at the core of the platform. Their projects cover areas such as low-level development, programming languages, distributed systems, performance, observability, software reliability and developer tooling.

Joining this internship means becoming part of a community of experienced engineers working on challenging software development topics. You will contribute to a concrete technical project while gaining hands‑on experience with the architecture and development of a large-scale financial software platform.

Your missions / What you’ll do?

Following An Onboarding Program Covering Software Engineering Practices And The MX.3 Platform, You Will Contribute To a Project With Direct Technical Impact. Depending On Your Assignment, You May

• 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