Software Engineer Specialist - Data And Ai

Sanofi España; Barcelona; Hybrid; EUR 65,000 - 90,000; Full time

Job summary

Sanofi España in Barcelona seeks a Software Engineer Specialist - Data & AI to build full-stack applications and platform services across the OneMesh ecosystem using React, TypeScript, Node.js, and Python (FastAPI). You’ll work on data platforms, internal tools, and AI-powered applications deploying globally.

You will design robust APIs (REST/GraphQL), implement GenAI patterns, deploy cloud-native apps on OpenShift and AWS, and contribute to CI/CD, security, observability, and governance.

Qualifications

• Bachelor's degree in Computer Science or a related field.
• Experience building software products, backend systems, platform services, or cloud-native applications is a strong plus.
• Strong English communication across cross-functional teams.

Responsibilities

• Build full-stack applications and platform services across the OneMesh ecosystem using React, TypeScript, Node.js, and Python (FastAPI).
• Design and maintain robust APIs (REST and GraphQL) for data and AI capabilities.
• Implement AI and GenAI patterns including LLM APIs, RAG, and agent orchestration.
• Deploy and operate cloud-native apps on OpenShift (Kubernetes) and AWS; use Terraform and GitOps.
• Champion production-readiness with security, observability, health checks, and dashboards.
• Build and maintain CI/CD pipelines and contribute to code reviews and standards.
• Collaborate with data engineers, ML practitioners, product teams, and stakeholders.

Skills

Full-stack development

Data & AI platforms

React

TypeScript

Node.js

Python (FastAPI)

GenAI/LLM patterns

Education

Bachelor's degree in Computer Science or related field

Tools

Docker

Kubernetes/OpenShift

Terraform

REST/GraphQL APIs

OpenShift

GitHub Actions

Job description

Location: Barcelona, Spain

About the Job

As Software Engineer Specialist - Data and AI 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.

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