R&D
Where your curiosity drives the
miracles of
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Job title: internship 6 months cell culture process development

• Location: Vitry-sur-Seine
• Starting date: February 2027

About the job

within our Commercial Cell Culture Process Development as a Cell Culture Process Development intern R&D department, you’ll contribute to the development, understanding and characterization of mammalian cell culture processes used for the production of therapeutic monoclonal antibodies. Ready to get started?

Based on Vitry sur Seine, you will join a multidisciplinary bioprocess development team working at the interface between laboratory development and industrial manufacturing. You will have the opportunity to work with different bioreactor technologies and contribute to projects supporting the transfer, scale-down and characterization of cell culture processes before implementation at manufacturing scale.

Ready to grow your skills while helping shape the future of healthcare? At Sanofi, you’ll be empowered to learn, ask questions, and bring your ideas to life – all while supported by inspiring mentors and collaborative teams.

About Sanofi:

We’re an R&D-driven, AI-powered biopharma company committed to improving people’s lives and delivering compelling growth. Our deep understanding of the immune system – and innovative pipeline – enables us to invent medicines and vaccines that treat and protect millions of people around the world. Together, we chase the miracles of science to improve people’s lives.

Main responsibilities:

• Participate with the R&D team in the design and execution of cell culture experiments using laboratory-scale bioreactors and high-throughput bioreactor systems, including sample collection and analysis
• Contribute to process data analysis and the identification of relationships between process parameters and performance, supporting the definition of appropriate operating ranges
• Contribute to the improvement and optimization of laboratory processes and experimental protocols, as well as to the evaluation of innovative technologies
• Support development activities by conducting literature reviews and gathering technical information
• Contribute to the preparation of Standard Operating Procedures, study protocols and technical reports, integrating Health, Safety and Environmental requirements
• Collaborate with scientists, engineers, analytical teams and manufacturing partners to interpret experimental results and translate them into process recommendations
• Take part in presenting experimental results and scientific conclusions to the project team and contribute to the associated technical documentation

About you

• Soft and technical skills: communication, rigor, organization. Skills in cell culture, bioprocessing and biological drug manufacturing
• Education: bac +5 in biotechnology, bioprocess engineering or biochemical engineering
• Languages: english fluent

Why choose us?

• Launch your career with a company that invests in you — and empowers you to reimagine what’s possible.
• Build your future with access to the latest tools, digital innovation, and continuous learning that keep you ahead of the curve.
• Grow in a purpose-driven company where your voice matters and your work helps improve millions of lives.
• Thrive in inclusive, flexible workplaces that support your personal and professional well-being.
• An attractive internship bonus.
• Depending on your location, access to a company restaurant with a contribution from Sanofi. 
• Our recruitment process is designed to be fast and efficient. If your application is accepted, you will receive a call from our recruiter for an initial telephone interview, followed by a quick meeting with the manager.

Pursue Progress. Discover Extraordinary.

Join Sanofi and step into a new era of science - where your growth can be just as transformative as the work we do. We invest in you to reach further, think faster, and do what’s never-been-done-before. You’ll help push boundaries, challenge convention, and build smarter solutions that reach the communities we serve. Ready to chase the miracles of science and improve people’s lives? Let’s Pursue Progress and Discover Extraordinary – together.

At Sanofi, we provide equal opportunities to all regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, protected veteran status or other characteristics protected by law.

Pursue Progress. Discover Extraordinary.

Join Sanofi and step into a new era of science - where your growth can be just as transformative as the work we do. We invest in you to reach further, think faster, and do what’s never-been-done-before. You’ll help push boundaries, challenge convention, and build smarter solutions that reach the communities we serve. Ready to chase the miracles of science and improve people’s lives? Let’s Pursue Progress and Discover Extraordinary – together.

At Sanofi, we provide equal opportunities to all regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, protected veteran status or other characteristics protected by law.