Senior Backend Engineer (Java/Kotlin)

Senior Back End Software Engineer joining the Business Performance team at Doctolib. Your mission will be to help reinforce Doctolib's position as a leading healthcare technology platform by building high-quality products that improve the daily lives of healthcare professionals and patients.

What you'll do

• Collaborate with product managers, designers, and engineers to design and ship features that deliver real value to healthcare professionals and patients
• Design and implement robust technical solutions ensuring performance, security, and usability across our back-end applications
• Contribute to technical decisions and architectural choices — not just implementation — helping shape the long-term direction of the platform
• Navigate integration complexity across a broad and diverse partner ecosystem, balancing delivery speed, reliability, and maintainability
• Champion AI-assisted development workflows and help elevate your team's proficiency with these tools
• Share your expertise across teams to evolve Doctolib's architecture and technical standards through knowledge sharing, code reviews, and pair programming

What you'll need

• Strong back-end software engineering experience with the JVM ecosystem (Java, Kotlin, Spring Boot)
• Hands-on experience using AI-assisted coding tools and comfortable integrating them into your daily workflow
• Significant experience navigating integration complexity across large partner networks and diverse legacy systems
• "User first" mindset and committed to building secure, well-tested, and pragmatic code
• Proactive, curious, and eager to grow alongside teammates through pair programming and cross-team collaboration
• Fluent in English

Nice to have

• Experience with Ruby on Rails
• Contributed to large-scale platform architecture discussions or technical roadmap planning

What they offer

• Deutschlandticket (Germany-wide public transport pass) fully paid
• 28 vacation days + 1 additional day for each full calendar year (up to 30 days)
• Work from abroad up to 10 days per year through flexibility days policy
• Company health insurance with supplementary benefits through Allianz
• Company pension scheme (bAV) with 40% employer subsidy
• Subsidized meal benefit, sports membership, and mental health services