Senior Java Backend Engineer (m/f/x)

Atolls is the world’s largest community-driven shopping platform, active in 20+ markets. We help millions make smarter spending decisions across discovery, evaluation, and (re-)purchase by connecting people with the right brands and retailers. Our 1,000+ team across 10 countries builds products used every day at global scale, where you’ll have real ownership and see your impact.

• Design, develop, and maintain scalable backend services using Java 17 or other recent versions (11+).
• Build and evolve microservice-based and event-driven architectures.
• Develop APIs using GraphQL.
• Work with Spring Boot and Spring Reactive (WebFlux).
• Design and optimize data models using MySQL and NoSQL databases (DynamoDB or MongoDB).
• Ensure high performance, reliability, and scalability of backend systems.
• Write clean, maintainable, and well-tested code.
• Implement performance testing and end-to-end testing.
• Collaborate closely with product managers, frontend engineers, and DevOps.
• Contribute to architectural decisions and technical best practices.
• Mentor junior engineers and provide technical leadership when needed.
• Collaborate on AI-enabled features, including prompt engineering and backend integrations.

• 8+ years of professional experience in backend development.
• Strong expertise in Java 17 or other recent versions (11+).
• Extensive experience with Spring Boot and Spring Reactive.
• Solid knowledge of MySQL and experience with NoSQL databases (DynamoDB or MongoDB).
• Hands-on experience with Kubernetes.
• Strong understanding of microservice architecture and event-driven systems.
• Experience building and consuming GraphQL APIs.
• Proven experience with performance optimization and testing.
• Experience with end-to-end testing strategies.
• Experience with prompt engineering for AI-powered applications.
• Experience with Python or strong willingness to learn Python.
• Excellent understanding of software design and architectural patterns.
• Ability to design elegant, scalable, and maintainable system architectures.
• Strong communication skills and excellent English proficiency.

• A culture that values personal and professional development, with internal mobility opportunities.
• A supportive and open-minded team that embraces diverse perspectives and innovative ideas.
• 32 days of paid vacation plus your birthday off, giving you the time you need to recharge.
• A flexible hybrid working scheme to balance work and life.
• Access to a learning budget and internal training to help you grow in your role.
• Mental health coaching to support your well-being.
• Regular global and local get-togethers to celebrate successes and build connections.
• The possibility of taking a sabbatical after three years with the company.
• A cloud-based company setup, providing flexibility and collaboration opportunities no matter where you are.