About the job

We are looking for a Senior Software Engineer (fullstack) to join the Manufacturing & Supply (M&S) Accelerator teams. Inside a small autonomous multi-functional agile team, you will help launch new medicines faster to cover unmet needs and deliver them affordably across the globe. This role is ideal for someone who wants a high level of ownership to not only bring software every day to production but also wants to contribute to building a whole product and to solve actual problems.

Main responsibilities:

Scope & impact:

• Designs, delivers, and runs software solutions that accelerate bringing medicines to the patients
• Ensures the scalability, maintainability, and reliability of the systems developed
• Contributes to the technical vision within a project scope while aligning with the broader engineering strategy

Prioritization & execution:

• Translates requirements into high-quality, performant code
• Collaborates with peers, product managers, and data engineers to ensure timely delivery
• Owns technical decisions and ensures effective execution of assigned work
• Values unowned or less visible work that enables the team to move faster

Technical excellence:

• Develops strong technical expertise in domains relevant to M&S innovation
• Upholds high standards in software engineering, testing, and documentation
• Advocates for best practices and contributes to team-wide technical standards
• Builds and maintains modern and cloud-native applications

Collaboration & contribution:

• Works closely with teammates and cross-functional partners to solve problems
• Supports team initiatives by contributing to shared codebases, tools, and processes
• Engages in code reviews, mentoring opportunities, and knowledge sharing
• Communicates clearly and proactively with both technical and non-technical stakeholders

About you

Soft & behavioral skills:

• Strong problem-solving and critical thinking skills
• Collaborative, flexible, and proactive team player with initiative and ownership
• Excellent written and verbal communication in English
• Growth mindset with enthusiasm for learning new technologies and approaches
• Innovation-focused with a willingness to experiment and suggest improved ways of working

Your background:

• 5+ years of experience (or equivalent knowledge). If you feel qualified, apply regardless of years of experience!
• Bachelor’s degree in Computer Science, Engineering, or equivalent experience is a plus
• Experience in an innovative, fast-paced environment

Technical requirements:

• Proficiency in JavaScript/TypeScript (Node.js)
• Proficiency in React or similar frameworks
• Experience with CI/CD practices and modern DevOps principles
• Experience with microservice architectures, API design, and cloud security best practices
• Infrastructure as Code (Terraform, AWS CDK, or similar) with experience in one or more of the major cloud providers (AWS, GCP, or Azure)

About Manufacturing & Supply (M&S):

At Sanofi, we’re committed to transforming the practice of medicine through breakthrough science. Within Sanofi, Manufacturing & Supply (M&S) is the bridge between Science and Patients, ensuring all patients get their dose reliably, that new medicines are launched faster to cover unmet needs and that they can be delivered affordably across the globe. At Sanofi we are convinced that Manufacturing is, and must in the future increasingly be, a competitive advantage and that digital unlocks every next step in that journey.

Imagine working in a vibrant startup environment, right in Lyon's bustling city center! We are an innovative global healthcare company with one purpose: to chase the miracles of science to improve people’s lives. Digital & Data are at the heart of Sanofi: our ambition is to be the leading digital healthcare platform to develop & deliver medicine faster, enable healthcare professionals to improve treatments, and help patients improve their health.

Ready to get started?

Why choose us?

• We provide a highly collaborative environment, with an opportunity to work with a world class team
• Contribute to a company that is not only a leader in healthcare but also a pioneer in digital transformation, shaping the future of global health
• Bring the miracles of science to life alongside a supportive, future-focused team
• Discover endless opportunities to grow your talent and drive your career, whether it’s through a promotion or lateral move, at home or internationally
• Enjoy a thoughtful, well-crafted rewards package that recognizes your contribution and amplifies your impact
• Take good care of yourself and your family, with a wide range of health and wellbeing benefits including high-quality healthcare, prevention and wellness programs and at least 14 weeks’ gender-neutral parental leave
• Play an instrumental part in creating best practice within our manufacturing facility

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.

#LI-FRA

#LI-Hybrid

Pursue progress, discover extraordinary

Better is out there. Better medications, better outcomes, better science. But progress doesn’t happen without people – people from different backgrounds, in different locations, doing different roles, all united by one thing: a desire to make miracles happen. So, let’s be those people.

At Sanofi, we provide equal opportunities to all regardless of race, colour, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, ability or gender identity.

Watch our ALL IN video and check out our Diversity Equity and Inclusion actions at sanofi.com!