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About the Role
Sanofi is building a GenAI platform to enable secure, reusable, and production-ready AI capabilities. The platform team creates foundational layers and core building blocks that other teams rely on, focusing on areas like cloud-native infrastructure, APIs, SDKs, observability, security, and GenAI data pipelines. A key project is AgentsHub, a central platform for registering, discovering, governing, and invoking AI agents, acting as a high-scale traffic layer between Sanofi applications and specialized agents.
Responsibilities
- Build and evolve reusable backend platform capabilities for GenAI applications, AI agents, knowledge retrieval, and cloud-native services.
- Design and implement APIs, shared libraries, and automation workflows used by other engineering teams, including internal UIs and back-office tools for managing platform resources and agents.
- Improve the reliability, security, observability, and scalability of platform services on AWS, integrating with GenAI building blocks.
- Contribute to production-readiness patterns: RBAC, audit logs, health checks, versioning, metrics, and operational tooling.
- Collaborate with squads and product teams to turn repeated needs into reusable platform primitives, and document and advocate for platform capabilities across Sanofi.
Requirements
- Strong curiosity for GenAI, LLMs, and AI agents.
- Solid backend engineering experience in JavaScript/TypeScript and Node.js.
- Experience designing and building APIs, backend services, or distributed systems.
- Experience with AWS or another cloud provider, including serverless/event-driven architectures.
- Understanding of authentication, authorization, RBAC, API security, and enterprise identity patterns.
- Interest in observability, debugging, tracing, logging, and operating production systems.
- English is mandatory as we are an international team.
- Strong ownership mindset.
- Comfortable working with multiple teams to drive alignment and results.
- Service-oriented mindset.
- Self-motivated, autonomous, and able to make progress in ambiguous situations.
- Pragmatic problem solver with critical thinking and good judgment.
- Clear written and verbal communication skills.
- Positive team player, open to feedback, and willing to share knowledge.
- Comfortable working in a fast-moving environment where patterns are still being invented.
- Several years of experience building software products, backend systems, platform services, or cloud-native applications.
- Prior hands-on experience with GenAI is valuable, but curiosity, engineering fundamentals, and learning speed matter more.
Skills
- GenAI application patterns (LLM APIs, RAG, tool calling, agent orchestration, MCP, A2A, evaluation, guardrails, vector databases)
- Python
- AWS services
- Terraform
- React
- TypeScript
- Node.js
- JavaScript
- Infrastructure as Code (Terraform, CDK, or similar)
- Serverless/event-driven architectures (Lambda, API Gateway, DynamoDB, SQS, Step Functions, ECS, or equivalents)
- Authentication
- Authorization
- RBAC
- API security
- Enterprise identity patterns
- Observability
- Debugging
- Tracing
- Logging
- Operating production systems
- GenAI integration patterns
- Bedrock
- Bedrock AgentCore
- Vector databases
- Knowledge bases
- Agent interoperability protocols
Location
- Paris
Work Type
- Hybrid
- 3 days a week onsite
- 2 days work from home
Experience Level
- Senior
Education Level
- Bachelor’s degree or equivalent experience in Computer Science, Engineering, or a related field is a plus
Salary/Compensations
- €64,000.00 - €96,000.00
Benefits
- Quality health insurance
- Extended maternity/parental leave (18/14 weeks)
- Enhanced support in case of illness
- Teleconsultation and second medical opinion covered by Sanofi
- Wellness programs
- 31 days of paid leave + RTT depending on your status
- Remote work up to 2 days/week
- Public transport coverage up to 80%
- Group Savings Plan and PERCOL with employer matching
- PERO
- Internal and international mobility opportunities
- Learning & development opportunities
- Platforms dedicated to peer-to-peer recognition & service exchanges between Sanofi employees (carpooling, home exchanges, etc.)
- Numerous CSE benefits
- Comprehensive rewards package
- Preventive programs
About the Company
- Sanofi is a leader in healthcare and a pioneer in digital transformation.
- Progress does not happen without people: people from different backgrounds, in different locations, doing different roles, all united by one thing: a desire to make miracles happen.
- We are building a GenAI platform that helps product and business teams move from isolated AI experiments to secure, reusable, production-ready capabilities.
Equal Opportunity
- 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.
- This job offer is accessible to all, regardless of gender.