About us

At Sanofi, we chase the miracles of science to improve people’s lives. All our decisions are taken with our most important stakeholder in mind – the patients.

Having a rich history of innovation that dates back over 100 years, Sanofi more than ever stays true to its commitment to transform the practice of medicine by providing potentially life-changing treatments and the protection of life-saving vaccines to millions of people. This history includes the first treatments for many rare diseases and the establishment of standards of care in diabetes and cardiovascular disease. Sanofi’s commitment to public health has helped protect hundreds of millions of people from influenza every year for decades and pushed polio to the brink of eradication, while its scientific vision has led to breakthrough innovations in the treatment of inflammatory diseases.

~ 43.07Bn€ Net Sales FY23

~90 countries

~ 91K employees

~ 59 manufacturing sites

~ 20 R&D sites

Job Overview

We are looking for a highly capable Full-Stack Developer who thrives at the intersection of front-end and back-end development. You will work closely with product managers, designers, and technical leads to build seamless, scalable, and secure web applications. This role requires deep proficiency in modern front-end frameworks (React/Vue), back-end platforms (Java Spring Boot), and supporting infrastructure such as Kubernetes, Redis, and CI/CD workflows.

The ideal candidate combines hands-on technical skills with a strong system design mindset, embraces AI-assisted development, and works effectively in an Agile, test-driven environment. Fluency in English is required for global collaboration; daily operations are conducted in Chinese.

Key Responsibilities

Application Development

• Build and maintain end-to-end web applications using Vue (with Vant) on the frontend and Java Spring Boot (Java 17+) on the backend.

• Design and develop scalable APIs via Spring Gateway, ensuring clean service boundaries and efficient routing.

• Implement responsive and accessible UI components using reusable design patterns and UI frameworks.

• Optimize frontend and backend performance for stability, responsiveness, and scalability.

Architecture & Engineering Practices

• Practice data modeling and architectural thinking to design modular, maintainable, and evolvable systems.

• Manage data flows across systems with strong database design (SQL and NoSQL), query optimization, and caching strategies (Redis).

• Leverage AI tools (e.g., GitHub Copilot) for efficient coding, and promote their effective use within the team.

• Adopt and improve CI/CD pipelines on GitHub Actions, ensuring quality and speed in software delivery.

• Define infrastructure using Infrastructure as Code (IaC) tools such as Terraform.

• Apply Test-Driven Development (TDD) and write reliable unit/integration tests using tools such as JUnit, TestNG, and Jest/Cypress.

Collaboration & Process

• Actively contribute to Agile ceremonies (sprint planning, stand-ups, retrospectives) and continuously deliver incremental value.

• Collaborate with frontend, backend, and DevOps teams to deliver cohesive product experiences.

• Participate in code reviews and enforce engineering standards and best practices.

• Communicate effectively with global colleagues in English and work collaboratively in a Chinese-speaking environment.

Required Skills & Qualifications

Technical Expertise

• Solid experience with Java Spring Boot, Spring MVC, Spring Data, Spring Security, and API design.

• Proficiency in modern front-end frameworks (Vue/Vuex, React/Redux), with experience using Vant for lightweight web interfaces.

• Strong command of JavaScript (ES6+), TypeScript, HTML/CSS, and tooling (Webpack, Vite).

• Experience with relational databases (PostgreSQL/MySQL), data modeling, indexing, and ACID principles.

• Familiarity with NoSQL technologies (MongoDB, Cassandra) and caching solutions (Redis).

• CI/CD experience using GitHub, with automation around builds, tests, and deployments.

• Kubernetes know-how, including Helm and container orchestration in cloud environments.

Development Mindset

• Strong “don’t reinvent the wheel” mentality; ability to reuse and integrate existing tools and libraries effectively.

• Passion for clean architecture, code quality, and engineering standards.

• Agile mindset with proven experience in Scrum-based teams.

Language Proficiency

• Fluent in English (spoken and written) for international collaboration.

• Comfortable in Chinese for daily work and team communication.

Preferred Qualifications

• 7+ years of experience as a full-stack developer equivalent in frontend/backend combined roles.

• Experience with C# (.NET Core) or Python (Flask/Django) is a plus.

• Experience working with Tencent Cloud or other cloud platforms (AWS, Azure).

• Contributions to open-source projects, technical blogs, or AI-enhanced developer tooling.

• Experience in regulated industries (e.g., healthcare, pharmaceutical) is advantageous.

• Participate in Agile ceremonies such as sprint planning, stand-ups, and retrospectives, contributing to iterative and incremental delivery.

Complementary Technologies

• Vant (for Vue-based UI)

• Gradle or Maven (Java build tools)

• RESTful APIs / GraphQL

• Redis, Elasticsearch

• Terraform / Helm / Prometheus / Git