Senior Software Engineer

Sanofi; Paris; Hybride; EUR 64 000 - 96 000; Plein temps

Avantages offerts par ce poste

Salaire fixe + incitation à court et à

Télétravail partiel

Résumé du poste

Sanofi recherche un Senior Software Engineer à Paris, modelé pour des plateformes GenAI. Vous concevrez et déployerez des composants backend et des APIs sur AWS, travaillant au sein d’une équipe produisant des bases partagées et des intégrations GenAI.

Le rôle est hybride (3 jours sur site, 2 jours télétravail) et nécessite une forte collaboration internationale. Compétences en JavaScript/TypeScript, Node.js et une passion pour l’ingénierie platform.

Qualifications

• Curiosité forte pour GenAI, LLM et agents d’IA.
• Expérience backend en JavaScript/TypeScript et Node.js; conception d’API, services backend ou systèmes distribués.
• Expérience avec AWS ou autre cloud et architectures serverless/orientées événements.
• Compréhension de l’authentification, autorisation et RBAC; sécurité des API.
• Intérêt pour l’observabilité: tracing, logs et systèmes en production.

Responsabilités

• Contribuer à des plateformes core avec API et bibliothèques partagées.
• Concevoir et implémenter des API et workflows automatisés utilisables par d’autres équipes.
• Renforcer la fiabilité, la sécurité et la scalabilité sur AWS avec Bedrock et bases de connaissances.
• Participer à des patterns de production readiness (RBAC, logs, health checks).
• Travailler avec plusieurs squads pour transformer des besoins récurrents en primitives réutilisables.

Connaissances

GenAI curiosité

LLM patterns

JavaScript/TypeScript

Node.js

API design

Distributed systems

Observabilité

RBAC

Formation

Bachelor ou équivalent en informatique

Outils

AWS

Terraform

CDK

API Gateway

DynamoDB

Description du poste

Description de l’emploi 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: Senior Software Engineer Location: Paris - Hybrid (3 days a week onsite, 2 days work from home)

About the job

Sanofi is building a GenAI platform that helps product and business teams move from isolated AI experiments to secure, reusable, production-ready capabilities. In a nutshell, a platform team creates the foundational layers and core building blocks that other teams rely on. We do not always provide direct business value ourselves; we help other technical teams focus on their own products by reducing repeated work, defining shared patterns, and building reusable capabilities. Our platform covers several layers: Cloud-native building blocks, infrastructure, and deployment patterns APIs, SDKs, shared libraries, and internal tools Observability, security, access control, and operational standards Document ingestion, knowledge retrieval, and GenAI data pipelines Agent creation, agent orchestration, evaluation, and governance capabilities GenAI and agentic capabilities are a growing part of that mission. As highlighted in the AWS Sanofi success story, Concierge has evolved into a unified, agentic AI companion used across the company. The GenAI Platform team builds the foundations that make this kind of experience possible: reusable agent patterns, secure APIs, knowledge pipelines, evaluation frameworks, and governed orchestration layers.

What You Will Build

You will contribute to platform products built with TypeScript, Node.js, React, AWS services, Terraform, and modern GenAI integration patterns. The role is hands‑on and product-oriented. Depending on priorities, you may work on backend APIs, internal UIs, cloud infrastructure, shared libraries, automation tooling, agent registries, knowledge integrations, evaluation capabilities, or operational dashboards. This is not a classical feature‑team role where the scope is limited to one business application. You will work on foundational platform capabilities that enable many teams to move faster and build safer, more reliable GenAI products.

Job Description

• 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 such as Bedrock, Bedrock AgentCore, vector databases, knowledge bases, and agent interoperability protocols
• 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

What we offer you:

• A fixed salary over 12 months, supplemented by a short‑term incentive, as well as a collective variable compensation based on Sanofi Group results.
• Benefits & Well‑being: Quality health insurance, extended maternity/parental leave (18/14 weeks), enhanced support in case of illness, teleconsultation and second medical opinion covered by Sanofi, as well as many other wellness programs to discover here.
• Work‑Life Balance: 31 days of paid leave + RTT depending on your status, remote work up to 2 days/week
• Transportation: Public transport coverage up to 80%
• Savings & Retirement: Group Savings Plan and PERCOL with employer matching, and PERO
• Professional Development: Internal and international mobility opportunities, learning & development opportunities
• And more: platforms dedicated to peer‑to‑peer recognition & service exchanges between Sanofi employees (carpooling, home exchanges, etc.), numerous CSE benefits...

The salary range for this position is :€64,000.00 - €96,000.00 Die endgültige Vergütung wird auf Grundlage nachgewiesener Erfahrung, Fähigkeiten, Standort und weiterer relevanter Faktoren bestimmt. Mitarbeitende können berechtigt sein, an den Mitarbeitenden Leistungsprogrammen des Unternehmens teilzunehmen. Wir sind ein forschendes Biopharma-Unternehmen, das KI anwendet und sich dafür einsetzt, das Leben der Menschen zu verbessern und verantwortungsvoll zu wachsen. Unser Team wird von einem Ziel geleitet: Wir erforschen die Wunder der Wissenschaft, um das Leben der Menschen zu verbessern. Wir möchten eine gesündere, widerstandsfähigere Welt schaffen und das Unmögliche möglich machen, indem wir Medikamente und Impfstoffe für Millionen von Menschen weltweit entdecken, entwickeln und bereitstellen. Erfahren Sie mehr über uns auf www.sanofi.com oder schauen Sie sich unseren Film an: We are Sanofi Starte eine Karriere, die einen Unterschied macht. Neuerfindung liegt in unserer DNA. Sie hat unsere Entwicklung von einem kleinen französischen Unternehmen zu einem der weltweit führenden Biopharma-Unternehmen vorangetrieben. Ob es darum geht, KI zu nutzen, um die Zeiten der Arzneimittelforschung zu verkürzen, oder Vertrauen im Gesundheitswesen aufzubauen – du kannst unseren Teams dabei helfen, das Leben für Patient*innen, Partner*innen und Gemeinschaften zu verbessern. Hier entwickelst du deine Karriere weiter. Wir öffnen dir die Tür, um neue Möglichkeiten zu entdecken, deine Grenzen zu erweitern und dich mit Menschen zu vernetzen, die von einem gemeinsamen Ziel angetrieben werden: Wir erforschen die Wunder der Wissenschaft, um das Leben der Menschen zu verbessern.

About you

Key Technical Requirements & Qualifications

• Strong curiosity for GenAI, LLMs, and AI agents; familiarity with GenAI application patterns (LLM APIs, RAG, tool calling, agent orchestration, MCP, A2A, evaluation, guardrails, vector databases) is a plus
• Solid backend engineering experience in JavaScript/TypeScript and Node.js (Python is a good second option); experience designing and building APIs, backend services, or distributed systems
• Experience with AWS or another cloud provider, including serverless/event‑driven architectures (Lambda, API Gateway, DynamoDB, SQS, Step Functions, ECS, or equivalents)
• Understanding of authentication, authorization, RBAC, API security, and enterprise identity patterns
• Interest in observability, debugging, tracing, logging, and operating production systems
• Infrastructure as Code experience (Terraform, CDK, or similar) is a plus
• React or modern frontend experience is a plus
• English is mandatory as we are an international team
• Soft and behavioral skills
• Strong ownership mindset: you care about the product, the users, and the quality of what you ship
• Comfortable working with multiple teams to drive alignment and results
• Service‑oriented mindset: you enjoy building platforms that help other engineers and product teams succeed
• 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

Your background

Several years of experience building software products, backend systems, platform services, or cloud‑native applications No specific diploma is required, but a Bachelor’s degree or equivalent experience in Computer Science, Engineering, or a related field is a plus Experience in an innovative environment, internal platform team, startup‑like setup, or product engineering team is a plus Experience in healthcare, life sciences, or regulated environments is a plus Prior hands‑on experience with GenAI is valuable, but curiosity, engineering fundamentals, and learning speed matter more

Why this role matters

GenAI is moving from experiments to real operational systems. At enterprise scale, the hard part is not only building one chatbot, one retrieval flow, or one agent. The hard part is creating the platform foundations that make these capabilities secure, reusable, observable, compliant, cost‑aware, and easy to integrate into real workflows. That is where the GenAI Platform team works. By joining the team, you will help shape how Sanofi builds and scales GenAI: from knowledge pipelines and shared APIs to agent platforms such as AgentsHub, where high‑scale agent traffic can be routed, governed, evaluated, and monitored across the company. This is an opportunity to work on a platform that sits at the intersection of software engineering, cloud architecture, GenAI, and enterprise transformation.

Why choose us?

Work alongside a supportive and forward‑thinking team dedicated to advancing the frontiers of healthcare. Contribute to a company that is not only a leader in healthcare but also a pioneer in digital transformation. Discover diverse career growth opportunities, whether through promotions, lateral moves, or international assignments. Benefit from a comprehensive rewards package that acknowledges your contributions and enhances your impact. Access a wide range of health and wellness benefits, including high‑quality healthcare, preventive programs, and at least 14 weeks of gender‑neutral parental leave. Pursue progress. Discover extraordinary. Progress does not happen without people: people from different backgrounds, in different locations, in 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 our ALL IN video and check out our Diversity Equity and Inclusion actions at sanofi.com.

Diversity und Inklusion sind in den Grundwerten von Sanofi verankert und spiegeln sich in unserer Arbeitsweise wider. Wir respektieren die Vielfalt unserer Belegschaft in Hinsicht auf ihre Herkunft, Erfahrungen und Lebensweisen. Wir erkennen die Bereicherung, die diese Vielfalt birgt, und fördern Inklusion sowie eine Arbeitsumgebung, in der diese Unterschiede sich weiter entwickeln können, zur Stärkung des Lebens unserer Mitarbeiter, Patienten und Kunden.