Biocatalysis Senior Scientist Full-time

Biocatalysis Senior Scientist

The job posting is in English given the significant interactions required with our global subsidiaries, for which English is the working language.

Location: Vitry-sur-Seine

About the job

As Senior Biocatalysis Scientist within our CMC Synthetics-Process Chemistry Organization, you'll help design, implement, and lead innovative biocatalytic processes to deliver robust, eco-designed synthetic routes for Sanofi's medicines in the most efficient and sustainable way. You'll play a key role in shaping the future of pharmaceutical manufacturing through enzyme screening, reaction engineering, and digitalized laboratory approaches. This role uniquely combines deep expertise in chemistry/biocatalysis with strong digital capabilities (DoE, AI tools, robotics, data science) to drive sustainable process development.

Join our Vitry-sur-Seine site, Sanofi's Center of Expertise in biocatalysis and a cutting-edge hub for sustainable chemistry innovation. As part of the Enzyme Production & Bioprocess team, you'll lead high-impact projects driving green chemistry transformation, digital innovation (DoE, AI tools, robotics), and process scale-up across global operations. Work with a multidisciplinary expert team, shape how medicines are made more sustainably, and enjoy career growth in a collaborative, forward-thinking environment where your skills will directly accelerate drug development for patients and their families.

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:

• Define enzyme screening strategies and biocatalytic process development for projects, ensuring alignment with timelines and budgets
• Perform reaction engineering, optimize biocatalytic transformations, and develop kinetic modeling approaches for enzymatic reactions
• Implement data science solutions (DoE methodologies, machine learning), program and operate robotics platforms, leverage AI tools for process optimization, and drive the digital transformation of biocatalytic workflows
• Plan, supervise, and execute laboratory experiments; ensure successful technology transfer of biocatalytic processes to pilot scale
• Document experimental work, generate comprehensive reports, and communicate results to multidisciplinary international stakeholders while maintaining scientific awareness
• Implement change management for new ways of working, support digital transformation projects, and maintain audit/inspection frameworks with Quality teams.

About you

• Experience: 3-6 years of experience in applied biocatalysis for small molecule synthesis (APIs, fine chemicals) with proven expertise in enzyme screening and biocatalytic process development
• Chemistry/Biocatalysis expertise: Deep knowledge of enzyme screening, biocatalytic process development, and reaction engineering for small molecule synthesis
• Digital Science & Automation: Expertise in laboratory automation, robotics programming, DoE, kinetic modeling, data analytics, and AI-driven process optimization to accelerate biocatalytic process development
• Ability to work in multifunctional and multicultural environments with strong cross-functional collaboration skills
• Leadership, autonomy and decision-making skills with rigorous organization and proactive initiative
• Analytical thinking and strategic capabilities in reaction engineering, process optimization, and scale-up technology transfer

• Education: PhD in chemistry or biocatalysis, biotechnology or any related topics or Master's Degree with minimum 5 year of proven experience.
• Command of the English and French language, both spoken and written

Why choose us?

• Lead the green chemistry revolution where biocatalysis and sustainable innovation transform how medicines are made for patients worldwide
• Work at the forefront of digitalized bioscience that leverages robotics, AI tools, and advanced modeling to accelerate process development and scale-up
• Collaborate beyond your expertise, sparking new ideas with diverse, multidisciplinary teams across chemistry, fermentation, engineering, and digital innovation
• Explore bold career paths at our state-of-the-art Vitry-sur-Seine Center of Expertise, with opportunities to grow through scientific excellence, technology transfer, and cross-functional leadership

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.

The salary range for this position is :€48 000,00 – €64 000

Final compensation will be determined based on demonstrated experience, skills, location, and other relevant factors. Employees may be eligible to participate in Company employee benefit programs.