Back End Developer

Research & Development – Back End Engineering /
Full-Time /
About this role

We are seeking a highly skilled Back End Developer to join our highly committed team. In this role, you will be responsible for the design, production and testing of software modules to ensure their quality, performance, security, and scalability.

You will collaborate with closely with members from across our teams including with mobile and frontend developers, security engineers, data engineers, and product managers to create innovative software and ensure a seamless user experience.

Main Missions

    • Write and review software requirements, integrating best practices and consistency with system requirements
    • Contribute to project planning, estimation, resource allocation and ensure timely and efficient delivery of the back-end roadmap
    • Design and develop scalable & secured back-end components for the Zoī apps (Web, Mobile)
    • Participate in code reviews and provide constructive feedback to team members
    • Participate in writing technical documentation and their review
    • Troubleshoot issues, improve performance and resolve security issues
    • Keep up-to-date with emerging technologies and industry trends

Ideal Candidate Profile

    • Bachelor's degree (or equivalent) in Computer Science, Information Technology, or related field.
    • Minimum 5 years of experience as a Back End Developer or similar role.
    • Excellent proficiency in NodeJS, Typescript and database management
    • Nice to have skills include: Clean Architecture, NestJS, GraphQL, MongoDB/NoSQL
    • Clear communicator: you excel in team communication, and have effectively navigated and bridged siloes in complex, multi-variable environments.
    • Innovative thinker: you transform innovative ideas into tangible results
    • Resilient problem-solver: challenging situations peek your curiosity, you demonstrate resilience and adaptability in high pressure environments
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