HPC Intern - Compiler Evaluation & Performance Analysis
Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Oct 20, 2026. Viridien scores A on the Alion truth index.
Viridien (www.viridiengroup.com) is an advanced technology, digital and Earth data company that pushes the boundaries of science for a more prosperous and sustainable future. With our ingenuity, drive and deep curiosity we discover new insights, innovations, and solutions that efficiently and responsibly resolve complex natural resource, digital, energy transition and infrastructure challenges.
Job Summary
Our production environment currently runs on an earlier version of these compilers, and migrating to a more recent one requires a thorough assessment of the changes introduced, both functionally and in terms of performance.
As part of this internship, you will help analyze the latest developments in a range of C++ and Fortran compilers used in our high-performance scientific computing activities.
Your mission will be to identify, analyze and document the main evolutions of this new compiler generation, focusing on the optimizations implemented, their impact on the performance of our scientific applications, and the potential benefits for our computing environments. You will run tests, compare results and make recommendations to support this technological transition.
About the Team
You will join a team of around fifteen professionals in Massy, where we develop and maintain our in-house scientific computing software and all its complementary tools (HPC, Big Data, AI). We work with colleagues around the world, and our team thrives on open exchange, innovation, feedback and continuous learning. We are proud to be able to count on one another to achieve our goals and serve our colleagues as best we can.
Key Responsibilities
- Review our current compilation environment.
- Get hands-on with the next version of the compiler range and conduct a literature review of its major changes.
- Select a set of test cases, either synthetic or drawn from our production scientific code.
- Analyze the compilation outputs of these test cases, compare them and assess the performance gains.
- Compare the optimizations applied by the compiler depending on the options enabled.
- Present progress to our team throughout the internship.
Qualifications
- You are currently pursuing a Master 2 degree in computer science (engineering school or university) and want to put your skills into practice in an innovative environment
- You are curious, motivated and proactive, with a strong analytical mind and a sense of initiative, which will be real assets in carrying out this mission
- You are a good listener, able to understand your colleagues’ needs and contribute effectively to the projects entrusted to you
- You have a solid foundation in Linux scripting (Bash, C Shell or equivalent) and are proficient in at least one programming language, such as C, Fortran or Python
- You are comfortable communicating in English, both written and spoken
- You enjoy teamwork and collaborating with people from varied profiles
- You are eager to grow in an international environment and gradually build your autonomy
Benefits
- An international culture in which the well-being and development of our employees are a top priority
- Access to company restaurant with subsidized price
- Access to benefits from Company works council
- Reimbursement of 50% of public transportation card in Ile-de-France region
- Attractive sustainable mobility incentive
- Love sports? Access to equipped Gym with reasonable price.
- Confidential employee assistance program to support our staff covering counselling, wellbeing, legal & financial issues.
Our Hiring Process
At Viridien, we are committed to delivering a respectful, inclusive, and transparent recruitment experience.
Due to the high volume of applications we receive, we may not be able to provide individual feedback to every applicant. Only candidates whose qualifications closely match the role criteria will be contacted for an interview. We do, however, aim to share personalized feedback with those who progress to the first round of interviews and beyond.
We are also dedicated to ensuring that our hiring process accessible to all. If you require any reasonable adjustments to fully participate in the application or interview stages, please don’t hesitate to contact your recruiter directly.
We see things differently. Diversity fuels our innovation, we value the unique ways in which we differ, and we are committed to equal employment opportunities for all professionals.