Doctolib

Senior Software Engineer - Core Front (x/f/m)

What we do

Join a team of passionate and hardworking entrepreneurs to transform healthcare!

Working in the tech team at Doctolib involves building innovative products and features to improve the daily lives of care teams and patients. We work in feature teams in an agile environment, while collaborating with engineering, design, and business teams.

What you'll do

We are looking for a Senior Software Engineer to join our Core Front team and help us become the #1 digital and secure medical companion for patients.

More specifically, you'll join a team of engineers and accessibility specialists working on advanced frontend development topics.

The Core Front Team serves as Doctolib’s frontend platform team, focused on delivering high-performance, accessible foundations for all our web applications. Its mission is to empower product teams to create exceptional user experiences at scale through standardized tools, frameworks, and best practices.

As a Senior Software Engineer, your responsibilities will include, but are not limited to:

• Lead the design, development, and delivery of core frontend services such as Internationalization (i18n), Client Storage, HTTP Client, and more, empowering all Doctolib product teams to build high-quality, user-centric applications.
• Enhance productivity and scalability through frontend tooling initiatives, using Vite and Rspack to accelerate builds, streamline CI/CD, and improve the frontend developer experience.
• Champion a User First mindset by embracing our Design System (Oxygen), delivering accessible, robust, and reusable components that enhance user experience and reliability across all our products.
• Take ownership of complex technical challenges, including large-scale migrations, architectural evolution, and distributed frontend systems using technologies like Module Federation.
• Establish and maintain best practices (“golden paths”) for frontend development, covering areas such as performance, automation, testing, and CI, in partnership with Staff Engineers.
• Mentor and support fellow engineers, sharing knowledge, reviewing code, and advocating for high standards in code quality, accessibility, and developer experience.
• Maintain a continuous learning mindset, proactively researching and evaluating new technologies, processes, and tools to keep Doctolib at the forefront of frontend engineering excellence.

About our tech environment

• Our solutions are built on a single fully cloud-native platform that supports web and mobile app interfaces, multiple languages, and is adapted to the country and healthcare specialty requirements. To address these challenges, we are modularizing our platform run in a distributed architecture through reusable components.
• Our stack is composed of Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native.
• We leverage AI ethically across our products to empower patients and health professionals. Discover our AI vision here and learn about our first AI hackathon here!

Who you are

If you don’t meet all the requirements below but believe this opportunity matches your expectations and experience, we still encourage you to apply!

You could be our next teammate if you:

• Have 5+ years of experience in engineering with a proven track record of building scalable, high-performance web applications
• Have strong expertise in React and TypeScript with experience in modern frontend architectures and patterns
• Understand the value of design systems and have experience creating, maintaining, or contributing to component libraries that scale across multiple teams
• Adapt quickly to change, embracing uncertainty and consistently solving problems to achieve meaningful outcomes.
• Are comfortable with performance optimization and have experience with Core Web Vitals, bundle optimization, and frontend performance monitoring
• Have experience with frontend build tools and CI/CD (Vite, Webpack, Rspack, or similar) and understand how to optimize development and production builds
• Are committed to accessibility and understand the importance of building inclusive user experiences that comply with WCAG guidelines
• Have proven experience developing maintainable and secure products with a focus on code quality, testing, and documentation
• Are comfortable speaking English in your day-to-day interactions with the team

Now, it would be fantastic if you:

• Know how to implement frontend monitoring and observability
• Have experience with Module Federation or micro-frontends and the challenges of distributed frontends
• Have a great understanding of web application performance tuning, cloud infrastructures and security topics
• Have contributed to open source or maintained internal tools/libraries

What we offer

• A competitive health insurance paid 100% by the company
• A dedicated onboarding program - the Doctolib Academy
• Mental health and wellbeing offer in partnership with moka.care
• The Doctolib Parent Care Program, including extended parental leave, meet-ups and inspiring conferences
• A subsidy from the work council to refund part of the membership to a sport club or a creative class
• Subsidy for lunch and various food offers in our offices
• A flexible workplace policy offering both hybrid and office-based mode
• Flexibility days allowing to work in EU countries and the UK 10 days per year

The interview process

• Recruiter Interview
• Feature Building interview
• System Design interview
• Behavioral Interview
• Offer!

Job details

• Permanent Position
• Full time
• Location: Levallois, Nantes
• Start Date: As soon as possible

If you would like to find out more about tech life at Doctolib, feel free to read our latest Medium blog articles!

At Doctolib, we believe in improving access to healthcare for everyone - regardless of where you come from, what you look like. This translates into our recruitment process: Doctolib is an equal opportunity employer. We don't just accept diversity at Doctolib, we respect and celebrate it!

The more diverse ideas are heard, the more our product will truly improve healthcare for all. You are welcome to apply to Doctolib, regardless of your gender, religion, age, sexual orientation, ethnicity, disability, or place of origin. If you have a disability, let us know if there's any way we can make the interview process smoother for you!

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