Front-End Developer

Research & Development – Front End Engineering /
Full-Time /
As a front-end engineer at Zoī, you'll be responsible for developing innovative web applications for preventive health. Zoī’s web application is the key interface for doctors and supporting medical operations teams. We are looking for an engineer with a deep understanding of core front-end principles, who can simplify complexity and transform design into clean code. The web app’s performance, accessibility, and superior user experience are all mission critical for our continued success and we are looking for a talented and committed engineer to join our team!

Main Missions

    • Conceptualize and develop responsive, user-friendly, secured web applications using React.js, TypeScript, and other relevant technologies
    • Collaborate with cross-functional teams, including designers, backend developers, security engineers  and product managers, and end-users (doctors) to create cohesive and well-integrated solutions
    • Implement and maintain UI components, ensuring accessibility and compatibility across various platforms and devices 
    • Utilize agile methodologies and CI/CD practices to iteratively improve and deploy web applications 
    • Conduct thorough quality assurance testing to identify and resolve bugs including security issues and performance issues 
    • Keep up-to-date with industry trends and best practices, incorporating them into the development process 
    • Participate in code reviews and provide constructive feedback to team members 
    • Contribute to project planning, estimation, and resource allocation to ensure timely and efficient delivery of web applications 
    • Participate in writing technical documentation and review

Ideal Candidate Profile

    • Bachelor's or Master's degree in Computer Science, Engineering, or a related field.4 years of proven experience in React.js
    • Excellent proficiency in Git and TypeScript is required
    • Previous experience with React Query, Sass, GraphQL, Node.js, Jest is highly appreciated 
    • Proven experience with agile methodologies, CI/DC and GitLab
    • Humble and curious, you are keen to understand the wider business environment and specific user needs to inform your code
    • Organized, methodical and analytical, you can transform complex challenges into simplified work plans and code
    • Dynamic and entrepreneurial, you have the energy and drive to take the lead on topics in a fast-paced start-up environment
    • Fluent French - our working language is French, strong written English skills required
    • This is a hybrid role with 2-days minimum in the Paris office.
More about Zoī

Zoī ( is a deeptech startup at the intersection of medicine and wellness, founded by Ismaël Emélien and Paul Dupuy. In 2022, they raised 20M Euros in seed capital from leading investors, among which, Stéphane Bancel, Xavier Niel, Jean-Marie Messier, and Rodolphe Saadé.

By combining advances in medicine, data science and behavioral science, Zoī provides its members with a state-of-the art 360° medical check-up, followed by a personalized digital support system to profoundly improve their quality of life and healthspan.

The three pillars of Zoī

1. A network of high-end health centers where members meet their medical team, undergo their check-up and start their preventive health journey

2. A critical algorithm and technology suite facilitating the work of the medical team to analyze holistically the millions of data points generated during the medical check-up and make personalized recommendations for members

3. A mobile application that helps members take daily action to implement recommendations and make qualitative changes in their lives