• Location: Barcelona, Spain

About the Job

As Data and AI Software Engineer Specialist within our OneMesh Platform team, you'll build the software and application layer that connects people to the power of data and AI across Sanofi.

Join Sanofi's Digital Data Team on our journey to become an AI-first organization. We're building the next generation of data and AI platform services — from internal developer tools and data platform interfaces to AI-powered applications and governance tooling. Working on a leading-edge tech stack with world-class mentorship, you'll contribute to products deployed globally that directly impact millions of lives. Our hybrid working model combines remote flexibility with collaborative office-based work, and our team culture is data-obsessed, impact-driven, and focused on delivering solutions that reach across the world with the best possible societal outcomes.

About Sanofi

Sanofi is dedicated to supporting people through their health challenges. We are a global biopharmaceutical company focused on human health, committed to chasing the miracles of science to improve people's lives. Our team, across some 100 countries, is dedicated to transforming the practice of medicine by working to turn the impossible into the possible. We provide potentially life-changing treatment options and life-saving vaccine protection to millions of people globally, while putting sustainability and social responsibility at the center of our ambitions.

At Sanofi, we believe our people are our greatest strength, and we are committed to creating an inclusive environment where diverse perspectives drive innovation. Our values—Aim Higher, Act for Patients, Be Bold, and Lead Together—guide everything we do.

Main responsibilities

• Build full-stack applications and platform services across the OneMesh ecosystem using React, TypeScript, Node.js, and Python (FastAPI) — from data platform UIs and internal developer tools to AI-powered applications and operational dashboards
• Design and maintain robust APIs (REST and GraphQL) that enable internal teams to discover, manage, and interact with data and AI capabilities, integrating cleanly into broader Sanofi digital products
• Implement AI and GenAI application patterns including LLM APIs, Retrieval-Augmented Generation (RAG), agent orchestration, and evaluation frameworks, building reusable platform primitives that help other teams build faster and safer
• Deploy and operate cloud-native applications on OpenShift (Kubernetes) and AWS, following GitOps best practices and contributing to infrastructure-as-code using Terraform
• Champion production-readiness and observability by implementing security controls, audit logging, health checks, metrics dashboards, and alerting to ensure platform services are reliable, debuggable, and operationally sound
• Build and maintain CI/CD pipelines to enable fast, reliable, and automated delivery, while contributing to code reviews, architectural discussions, and engineering standards
• Collaborate across cross-functional teams — partnering with data engineers, ML practitioners, product teams, and business stakeholders to translate platform capabilities into polished, user-friendly features

About you

• Education: Bachelor's degree or equivalent experience in Computer Science, Engineering, or a related field
• Experience: Proven track record of building software products, backend systems, platform services, or cloud-native applications; experience in internal platform teams, product engineering, or data-driven application development is a strong plus
• Technical skills: Strong command of Docker, Kubernetes/OpenShift, Python (FastAPI), Terraform, React, Node.js, and TypeScript; familiarity with AWS services (Lambda, API Gateway, ECS, RDS, Bedrock), Snowflake, PostgreSQL, Redis, message brokering, CI/CD (GitHub Actions), and GenAI/LLM application patterns is a meaningful advantage
• Mindset: Versatile and adaptable, with a strong ownership mentality and service-oriented approach; comfortable working across multiple products simultaneously and thriving in ambiguous, fast-moving environments
• Collaboration: Excellent communicator in English who can translate complex technical concepts for non-technical stakeholders and enjoys working across diverse, cross-functional teams

Why choose us?

• Make a real impact — build tools and platforms that directly improve and save lives at a global leader in healthcare
• Work at the cutting edge — contribute to products deployed globally on a leading-edge tech stack at the intersection of software engineering, cloud architecture, data platforms, and AI
• Learn from the best — access world-class mentorship and training, working with renowned leaders and academics in machine learning, data, and software engineering
• Grow your career — discover diverse opportunities through promotions, lateral moves, or international assignments in a company that values your development

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-Hybrid #BarcelonaHub #SanofiHubs

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 !

The salary range for this position is :€49.600,00 - €74.400,00

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.