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Staff Software Engineer

Paris, France Regular Posté le   Dec. 24, 2025 Expire le   Mar. 02, 2026
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Le contenu du poste est libellé en anglais car il nécessite de nombreuses interactions avec nos filiales à l’international, l'anglais étant la langue de travail.

This job offer is accessible to all, regardless of gender.

Job Title:Staff Software Engineer

  • Location: Paris (Hybrid - 2 days remote, 3 days on-site)

About the job

At Sanofi Accelerator's R&D, we work at the intersection of science and software, partnering closely with product teams and scientists to revolutionize how we approach drug development. Our mission is to leverage cutting-edge technology to innovate across the entire R&D pipeline, from initial research through clinical trials. 

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?

About Sanofi:

We’rean 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.

Your Impact:

As a Staff Software Engineer you will: 

  • Design and implement robust software solutions that accelerate research workflows and improve data analysis capabilities
  • Lead technical decision-making for key projects, ensuring scalable and maintainable architectures 
  • Mentor senior engineers and contribute to building a strong engineering culture 
  • Set technical standards and drive adoption of best practices across the team
  • Support and collaborate with other teams to optimize workflows and eliminate bottlenecks
  • Advocate for best engineering practices
  • Surprise us

About you

Technical Requirements:

  • Experience with one or more of the major cloud providers such as AWS, GCP, or Azure 
  • Infrastructure as Code – Terraform, AWS CDK, or similar 
  • Proficiency in JavaScript / Node.js 
  • Proficiency of microservices, APIs, and cloud security 
  • CI/CD practices and DevOps principles 

Soft & Behavioral Skills:

  • Experience working with multiple teams to drive alignment and results
  • Service-oriented, flexible, and a team player who takes initiative
  • Strong problem-solving & critical thinking skills
  • 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 introduce improved ways of working
  • Collaborative leadership that encourages open dialogue where team members feel safe to share ideas and learn from mistakes
  • You have a proven ability to spot organizational leverage points that unlock exponential productivity gains

Your background:

  • 8+ 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

Hiring Process:

  • Online Technical Assessment:  1h30 min – showcase your skills
  • Initial Interview: 45 min – Meet the team, share your experience
  • Technical Deep Dive: 2 hours – Discuss cloud, APIs, and problem-solving
  • Leadership Chat: 45 min – Meet our Head of Engineering

At Sanofi, we empower engineers to take responsibility and accountability for what they build. You have the freedom of technical choice to drive innovation: 

  • Assumes responsibility for the success of projects, including meeting deadlines and quality standards
  • Takes ownership of technical decisions and leads efforts to overcome obstacles
  • Accountable for the overall performance and efficiency of engineering solutions
  • Actively participates in the design, development, and testing of critical components

Growing Our Team and Culture:

At Sanofi, beyond technical expertise, we value leadership that builds strong teams. You'll have opportunities to: 

  • Lead technical initiatives while fostering collaboration across teams 
  • Shape our engineering culture through mentoring and knowledge sharing 
  • Help grow our team by participating in hiring and talent development 
  • Drive positive team culture that encourages innovation and inclusivity 

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

PursueProgress.DiscoverExtraordinary.

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 dowhat’snever-been-done-before.You’llhelp push boundaries, challengeconvention, and build smarter solutions that reach the communities we serve. Ready to chase the miracles of science and improve people’s lives?Let’sPursueProgressand DiscoverExtraordinary– together.

At Sanofi, weprovideequal 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-Onsite

#LI-EU

#Accelerator

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Toujours Progresser. Découvrir l’Extraordinaire.

Rejoignez Sanofi et entrez dans une nouvelle ère de la science – où votre parcours peut être aussi transformateur que le travail que nous accomplissons. Nous investissons en vous pour que vous alliez plus loin, accélériez votre réflexion et accomplissiez ce qui n’a jamais été fait auparavant. Vous contribuerez à repousser les limites, à bousculer les conventions et à concevoir des solutions plus intelligentes pour les communautés que nous servons. Prêt·e à poursuivre les miracles de la science et à améliorer la vie des gens ? Poursuivons le progrès et découvrons l’extraordinaire – ensemble.

Chez Sanofi, nous croyons dans l’égalité des chances, sans distinction de race, de couleur, d’ascendance, de religion, de sexe, d’origine, d’orientation sexuelle, d’âge, de citoyenneté, d’état civil, de handicap, d’identité de genre ou de tout autre critère protégé par la loi.

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