Full Stack Engineer

Full Stack Engineer page is loaded## Full Stack Engineerlocations : Barcelonatime type : Full timeposted on : Posted Todaytime left to apply : End Date : October 10, 2025 (29 days left to apply)job requisition id : R #

• Full Stack Engineer
• Location : Barcelona - Spain
• Type of work : Full time
• ##
• Primary Responsibilities
• Implement complex and data-intensive user interface that is also beautiful and accessible in a performance and maintainable way
• Design front-end solutions to meet business needs in an operational and financially efficient manner
• Collaborate closely with the Design Team, Data Science Team, Product Owner and developers on the team to enhance the overall user experience
• Design front-end solutions to meet business needs in an operational and financially efficient manner
• Promote the right usage of company standards, IT industry practices, and emerging standards
• Assist with technical solution discovery to ensure technical feasibility
• Create smart components and manage component library
• Own all areas of the product lifecycle : design, development, test, deployment, operation, and support
• Create detail documentation on Confluence to be able to support and maintain codebase and its functionality##
• About you
• ###
• Qualifications
• 3+ years of front-end development experience, with a significant portion using React.js
• Bachelor’s degree in computer science, engineering, or similar quantitative field of study
• Strong hands-on experience working with front end technologies such as React framework & React UI component libraries, JavaScript, NodeJS, Angular, and HTML / CSS
• Experience designing / developing RESTful APIs, HTTP APIs, and implementation of WebSocket
• Familiar with software best practices (design patterns, development standards)
• Experience with data visualization libraries
• Experience organizing and managing re-usable component library for codebase
• Experience owning and maintaining NPM packages and the challenges associated with it being used in multiple applications
• Experience with modern testing framework, such as Jest
• Experience withGithub is a plus (source code control / UI production deployment)
• Exposure to back-end technologies (Python, FastAPI), a plus###
• Nice to have
• Experience using Cloud Containerization technologies (Docker, Openshift, AWS ECR / EKS)
• Familiarity with SonarQube,Checkmarx, Artifactory, AWS CloudWatch, Authorization (OAuth, KeyCloak, AuthN / AuthZ)
• 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.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.#LI-Hybrid #BarcelonaHub #SanofiHubs# Pursue
• progress
• , discover
• extraordinary
• Better is out there. Better medications, better outcomes, better science. But progress doesn’t happen without people – people from different backgrounds, in different locations, doing different roles, all united by one thing : a desire to make miracles happen. So, let’s be those people.At Sanofi, we provide equal opportunities to all regardless of race, colour, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, ability or gender identity.Watch our and check out our Diversity Equity and Inclusion actions at !

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