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Accelerator Senior Software Platform Engineer (Lyon)

Lyon, France Regular Posted on   Sep. 05, 2025 Closing on   Jan. 01, 2026
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Job title: Accelerator Senior Software Platform Engineer (Lyon)

  • Location: Lyon

About the job

Our Team: In the Accelerator's Platform Team

In a nutshell, a platform team is a team that creates the foundational layers and core building blocks of a company’s products. We do not provide direct value to the business, we do, however, support and help all other technical teams to focus on their productivity. The platform team is also here to find ways for multiple teams to work on a cross project that can be reused by all. 

More concretely a platform can be at different levels of granularity:

  • CI configs and rules to be used by other teams 
  • IaC, tooling to deploy and monitor resources in the Cloud 
  • Development environment, tools and shared libraries 
  • Help and can define global system architecture / security 
  • Core abstractions (data model, business modeling) API/SDKs 

Job Description

Your key responsibilities will be:

  • Improve the Developer eXperience 
  • Lower the technical overhead for squads / pods 
  • PoC all things that could bring better standards - then deploy it! 
  • Support and help all teams when necessary 
  • Build various tools in a large pool of environment (cli, libraries, IaC, workflow) 
  • Work on everything you think can make the difference! 
  • Create documentation / recommendation on how to build Cloud Native solution 
  • Advocate on the solutions built 

About you

Key Technical Requirements & Qualifications

You don't need to check all the points! If you fit only a few of them that is more than enough. But expect to work on most of these points during your daily tasks :) 

  • The thirst for knowledge 
  • Experience working on Cloud Providers 
  • Good understanding of JavaScript / Node.js 
  • Experience of Infrastructure as Code tools (Terraform, AWS cdk or any others) 
  • Knowledge of building libraries and tools 
  • Knowledge of complex APIs systems (network, redundancy, security, logging, etc.) 
  • Keen to work in a cross team environment 
  • Help and support other teams 
  • Knowledge of all transversal activities is a plus (security, optimization, process, etc.) 
  • English is mandatory as we are an international team! 

Soft and behavioral skills

  • Experience working with multiple teams to drive alignment and results 
  • Service-oriented, flexible, positive team player 
  • Self-motivated, takes initiative 
  • Problem solving & critical thinking 
  • Good written and verbal communication skills 

Your background

  • 6+ years of experience but do not hesitate to apply if you think you have all the knowledge - this is non blocker 
  • No diploma is required but Bachelor's degree or equivalent in Computer Science or Engineering is a plus
  • Experience in an innovative / breaking walls environment 
  • Experience in the healthcare industry is a plus 

Pursueprogress. Discover extraordinary.

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. You can be one of those people. Chasing change, embracing new ideas and exploring all the opportunities we have to offer. Let’s pursue progress. And let’s 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, or gender identity.

Watch ourALL IN videoand check out our Diversity Equity and Inclusion actions atsanofi.com

#LI-FRA #LI-Onsite #Accelerator

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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.

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Sanofi careers in France

We're 20,000 people, working across 28 sites in France with one goal: getting medicines and vaccines to people who need them most. From day one, you'll take on exciting projects to set the course of your career. Whether you're a researcher or a marketer, you'll discover the tools, resources, and support you need to pursue progress. Develop your skills and work in inclusive teams to positively impact millions of people globally.

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