Senior Software Engineer - Business Performance (x/f/m)

Join our mission, join Doctolib! Doctolib is growing, and we are hiring a Senior Fullstack Software Engineer in Nantes to join the Business Performance team. Your mission will be to help Doctolib reinforce its position as a leading healthcare technology platform by building high-quality products that improve the daily lives of healthcare professionals and patients. You will work in feature teams developing solutions that directly impact millions of people across Europe. Working in the tech team at Doctolib means building innovative products and features to improve the daily lives of care teams and patients. Your impact Your responsibilities include but are not limited to: • Collaborate with product managers, designers, and engineers to build features that deliver value to healthcare professionals and patients • Design and implement technical solutions ensuring performance, security, and usability across our fullstack applications (React, Ruby on Rails, JVM ecosystem) • Strong design and architecture skills: you contribute to technical decisions, not just implementation • A track record of balancing delivery speed, reliability, and maintainability under real constraints • Comfortable with AI-assisted development workflows, and able to help your team raise their own proficiency • Share your expertise and collaborate across teams to evolve Doctolib's architecture and technical standards • In BP, the scope is broad, and the topics are diverse. Teams are small, and decision-making is close to the action. And if you want to understand how a tech scale-up generates (and protects) its growth, you’ll have a front-row seat. Life at Doctolib Tech • Our solutions are built on a single fully cloud-native platform that supports web and mobile app interfaces, multiple languages, and is adapted to country and healthcare specialty requirements. • 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 . Want to learn more about our tech culture and environment? Visit the Doctolib Tech site . Who you are Before you read on: if you don't have the exact profile described below, but you feel this job description matches your skill set, we still encourage you to apply. You could be our next team mate if you: • You have fullstack software engineering experience with React and the JVM ecosystem (Java, Kotlin, Spring Boot) - Ruby experience is a bonus • You have a "user first" mindset and are committed to building secure, well-tested, and pragmatic code • You bring a strong testing culture and are passionate about code quality and system resiliency • You are proactive, curious, and eager to share knowledge through pair programming and collaboration What we offer • Free comprehensive health insurance (basic package) for you and your children • 25 days of paid vacation per year, plus up to 14 days of RTT • Free mental health and coaching services through our partner Moka.care • Work from abroad for up to 10 days per year thanks to our flexibility days policy • Lunch vouchers (Swile card) worth €8.50 per working day, with €4.50 covered by Doctolib • A subsidy from the work council to refund part of the membership to a sport club or a creative class • 50% reimbursement of your public transport subscription • Enrollment in Doctolib's long-term employee value sharing plan called DoctoGrowth • ParentCare Program: Enjoy full salary coverage (100%) during your first month of birth leave, and 75% during the second, covered by Doctolib • For caregivers and workers with disabilities, a package including an adaptation of the remote policy, extra days off for medical reasons, and p