
Junior Backend Developer
Chengdu, Chine Fixed Term Posté le Jul. 04, 2025 Expire le Jul. 31, 2025About 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 motivated Junior Backend Developer with 4+ years of backend development experience, who is passionate about building scalable backend services using modern cloud-native technologies. In this role, you will work under the guidance of senior developers to develop backend services using Java Spring Boot (Java 17+), participate in large-scale system development, and gradually adopt LLM-powered coding workflows. This is an excellent opportunity to gain hands-on experience with distributed systems, Kubernetes, CI/CD automation, and Infrastructure as Code (IaC), while working in a bilingual (English/Chinese) engineering environment.
Key Responsibilities
Develop and maintain backend services using Java Spring Boot (Java 17+), following architectural patterns defined by senior developers.
Contribute to Spring Gateway configuration and learn to manage API routing and security rules.
Assist in implementing backend features by leveraging LLM tools (e.g., GitHub Copilot) for code generation.
Collaborate on data modeling, system modularization, and service orchestration following existing design standards.
Integrate and support services using Redis, Elasticsearch, and relational databases such as PostgreSQL.
Learn to deploy and troubleshoot applications in Kubernetes, using kubectl and Helm under team guidance.
Support the CI/CD workflow using GitHub Actions, ensuring smooth automated builds and deployments.
Help maintain Infrastructure as Code practices using tools like Terraform or similar, with mentoring from senior staff.
Work closely with frontend developers, QA engineers, and DevOps team members to ensure seamless backend integration.
Participate in Agile ceremonies including daily stand-ups, sprint planning, and retrospectives.
Required Skills & Qualifications
Technical Expertise
4+ years of experience in backend development, primarily using Java Spring Boot.
Familiarity with Spring MVC, Spring Data, and RESTful API development.
Exposure to Spring Gateway and interest in API gateway design and optimization.
Experience working with relational databases (e.g., PostgreSQL or MySQL) and basic knowledge of ORM frameworks (e.g., Hibernate).
Hands-on experience with Redis and basic Elasticsearch operations.
Exposure to Kubernetes, Docker, and microservice deployment concepts.
Familiarity with CI/CD tools such as GitHub Actions and build tools like Gradle or Maven.
Basic understanding of Terraform or Infrastructure as Code principles.
Interest in LLM-powered development and willingness to adopt tools like Copilot into daily workflow.
DevOps & CI/CD
Interest in LLM-powered development and willingness to adopt tools like Copilot into daily workflow.
LLM-Assisted Development
Initial experience with LLM tools such as GitHub Copilot; eager to adopt AI-assisted workflows into day-to-day development.
Ability to teach and guide team members in adopting LLM-assisted coding workflows to enhance efficiency.
Mindset & Practices
Strong willingness to learn from senior developers and adopt modern development practices.
Adheres to a “do not reinvent the wheel” philosophy—prefers reusing well-established libraries, frameworks, and solutions.
Attention to detail and commitment to writing clean, maintainable code.
Strong team spirit, communication skills, and accountability in collaborative environments.
Language Proficiency
Fluency in English (speaking and writing) for documentation and collaboration with global teams.
Comfortable working in Chinese for day-to-day interactions and local team collaboration.
Soft Skills
Strong problem-solving skills with a pragmatic approach to balancing innovation and practicality.
Strong communication and collaboration skills; able to work effectively with cross-functional team members.
Preferred Qualifications
4+ years of backend development experience
Experience with Java (Spring framework) or C# (.NET Core) is a plus.
Familiarity with monitoring tools such as Prometheus, ELK, or Grafana.
Experience with message queues (e.g., RabbitMQ, Kafka) or GraphQL is a bonus.
Exposure to Tencent Cloud, AWS, or other cloud platforms.
Interest in the healthcare or pharmaceutical industry.
Complementary Technologies
In addition to the core requirements, proficiency in the following technologies is highly desirable:
Gradle or Maven for build automation.
Git for version control and collaborative development.
RESTful APIs, with bonus points for experience in GraphQL.
Basic shell scripting or DevOps skills will be advantageous.
Poursuivre le progrès. Découvrir l’extraordinaire.
Rejoignez Sanofi et entrez dans une nouvelle ère de la science – où votre parcours peut être aussi transformateur que le travail que nous accomplissons. Nous investissons en vous pour que vous alliez plus loin, accélériez votre réflexion et accomplissiez ce qui n’a jamais été fait auparavant. Vous contribuerez à repousser les limites, à bousculer les conventions et à concevoir des solutions plus intelligentes pour les communautés que nous servons. Prêt·e à poursuivre les miracles de la science et à améliorer la vie des gens ? Poursuivons le progrès et découvrons l’extraordinaire – ensemble.
Chez Sanofi, nous croyons dans l’égalité des chances, sans distinction de race, de couleur, d’ascendance, de religion, de sexe, d’origine, d’orientation sexuelle, d’âge, de citoyenneté, d’état civil, de handicap, d’identité de genre ou de tout autre critère protégé par la loi.
Vous n'avez pas encore consulté aucune d'offres d'emploi
Vous n'avez pas encore enregistré d'offres d'emploi.

Carrières Sanofi en Chine
Recherche, ingénierie, vente, nous travaillons tous vers le même objectif : réduire de moitié le délai entre la découverte et la thérapie. Nos salariés mènent d’incroyables carrières, en développant 40 nouveaux médicaments et vaccins innovants pour la Chine. Nous travaillons avec le ministère national de la santé à « China 2030 ». Ainsi, nous sommes meilleur employeur en Chine et poursuivons notre croissance depuis l’ouverture de notre premier site en Chine (1982).
En savoir plus
sur ce site
Un monde de possibilités
-
-
-
Quand vous évoluez, nous évoluons avec vous
Nous nous engageons à vous soutenir à travers une politique de rémunération complète, soigneusement élaborée pour contribuer à votre bien-être physique, financier, mental et social. Peu importe votre rôle, vous vous épanouirez au sein de nos équipes inclusives.
-
Construisez une carrière qui a du sens
Exprimez votre passion et impactez des millions de personnes à travers le monde. Vous êtes aux commandes : fixez vos objectifs et nous vous offrirons la formation et le soutien nécessaires pour les atteindre.
-
Lancez votre carrière
Explorez les possibilités : apprentissage, stages, postes pour jeunes diplômés, mobilité internationale. Vous serez accompagné pour avoir un impact significatif.
-
Nos sites
Nous sommes présents dans plus de 60 pays, tous unis pour définir l'avenir de la santé. Votre carrière évoluera aux côtés d'experts et grâce à la technologie au service des plus grandes avancées.
-
Sanofi Stories
At Sanofi every voice matters. Get to know the talented Sanofians shaping our future and pushing us toward our ambitious goals.
-
Pourquoi Sanofi ?
Accédez aux outils, à la formation et au soutien nécessaires pour atteindre vos objectifs. En réalisant votre plein potentiel, vous nous aiderez à atteindre notre objectif de réduire de moitié le temps entre la découverte et la thérapie.
-
Notre culture et nos valeurs
Premiers en pharma avec un comité DE&I, nous valorisons chaque voix. Avec Sanofi, faites entendre la vôtre pour bâtir notre avenir.
-
-
-
Meet Azer Hallabi, Project Manager, Global Regulatory Affairs
Discover the dynamic world of regulatory affairs with Azer Hallabi, Project Manager in Global Regulatory Affairs at our Budapest Hub.
-
Meet Nils Libert, Associate Scientist in R&D
Meet Nils Libert, an Associate Scientist contributing to groundbreaking research in R&D, Belgium.
-
Meet Orsolya Dina, Receivables & Revenue Team Lead
Follow Orsolya Dina’s inspiring journey as she embraces new opportunities for growth and advancement.
-
Meet Stefanie Van Poucke, GMP QA Head
Join Stefanie Van Poucke as she navigates the world of Quality Assurance, leading GMP QA efforts in R&D, Belgium.
-
Meet Robin, Digital Product Owner, Belgium
Dive into the digital world with Robin Meuris, as he discusses his role as a Digital Product Owner in Belgium.
-
Meet Ádám Honvéd, Product Owner Process Analytics
Step into the world of analytics with Ádám Honvéd as he shares his journey as a Product Owner for Process Analytics at our Budapest Hub.
-
Dachuan Li: From Operating Room to Medical Education
Dachuan Li traded his surgical scrubs for a career bridging science and healthcare as a Medical Science Liaison (MSL) in China.
-
Julien Guyomard: From Cars to COVID to Canada
How seizing opportunities built a global career. Julien's career in communications has taken him from the production lines of French car factories to the global stage of the Paris 2024 Olympics and finally to leading communications in Canada.
-
Vincent Dufauret: Embracing the Unexpected - Building a Versatile Career
Currently Global Digital Communication Project Lead, Vincent reflects on his diverse career journey. He shares the insights he wishes he'd understood from the beginning.
-
Finding Purpose at Sanofi: A Finance Professional's Path to Making a D
Hungarian Senior Financial Analyst Zoltán Borbás shares how the Budapest Hub offers a springboard for career growth while working for a company with real-world impact.
-
Carmen's Sanofi Journey: A Son’s Rare Diagnosis, a Renewed Mission
Carmen María Escamilla is Head of Customer Care in Supply Chain, based in Mexico. She discusses how personal experience with her son's rare genetic disorder helped shape her 11-year pharmaceutical career journey and why ensuring medicine availability has become her mission.
-
Balancing Career and Family: How Sanofi's Employee-First Culture Creates Opportunity in China
Lewis Lai, Direct to Patient (DTP) & Dual channel Pharmacy (DCP) Channel Manager based in Hangzhou, China, shares how Sanofi's supportive workplace policies and culture have enabled him to thrive professionally while embracing fatherhood.
-
Sustainability at the Heart: How Sanofi's Transformation is Building a Purpose-Driven Culture
Serena Ceccarelli reveals how Sanofi's integrated approach to sustainability is transforming the pharmaceutical giant while creating lasting social value through ambitious environmental targets and expanded healthcare access.
-
One Sanofi Career, Many Chapters: Bold Moves and Saying ‘Yes’ Drives Growth
Istanbul-based Şayan Tomris Örs, currently Polio, Pertussis, and Hib (PPH) Head of Eurasia for Vaccines at Sanofi, discusses her journey from chemical engineering graduate to marking leader to head up a franchise.
-
Lab Bench to Global Strategy: How Scientific Passion Led to Immunology Leadership
Aayam Lamichhane, Head of Strategy and Operations for Sanofi's Global Immunology Franchise, shares how his childhood fascination with science, a commitment to serving patients, and a drive to create meaningful change in the world led to a remarkable career journey across continents.
-
-
Meet Douglas Penson, Sustainability Apprentice, UK & Ireland
Douglas is a Corporate Responsibility and Sustainability Apprentice with a passion for the environment. Through his apprenticeship at Sanofi, Douglas is gaining valuable knowledge and contributing to meaningful, purpose-driven work.
-
Meet Matthew Odogwu, Associate Brand Manager Flu & Travel, UK & Ireland
Matthew is one of Sanofi’s Emerging Talent Graduate Scheme participants. Through hands-on rotations across different business units, he’s developed a diverse skill set – from tender management to marketing – while gaining real ownership and accountability.

Rejoignez notre communauté
de talents
Que pourrions-nous accomplir ensemble ? Chaque Sanofien travaille sur des projets qui ont un véritable impact sur la vie des gens.
Inscrivez-vous dès aujourd'hui et découvrez nos dernières opportunités dès qu'elles seront disponibles.