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. Want to shape the destinations people rely on to shop with confidence? Keep reading.

About This Role:

We are looking for a Senior Java Backend Engineer to join our growing engineering team in Berlin .You will play a key role in designing, building, and scaling high-performance backend systems using modern Java technologies and cloud-native architectures. This role is ideal for someone who enjoys working on complex systems, cares deeply about code quality and has a strong architectural mindset.

Our Benefits:

At Atolls, we believe in nurturing both your professional and personal growth. Here’s what you can expect:

• 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.

*These are global benefits that apply to all employees, with additional local perks based on your location.

Responsibilities:

As a Senior Java Backend Engineer , you will:

• 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

Your Profile:

• 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

Bonus points:

• Cloud experience (AWS/GCP/Azure)
• Experience with CI/CD pipelines
• Experience building AI-integrated backend systems

Our hiring process :

1. TA Call : Meet one of our Talent Experts and get to know Atolls better.
2. Technical Round : Focus on the technical aspects of the role (Through a Live Case) , and meet your potential manager.
3. Final Round : Meet other Atollians ️
   It varies from 1 to 3 interviews

*Some processes might slightly change according to needs

Ready to apply?

Be part of a destination where your work helps millions of people make better decisions every day. One focused application is all we need. If you truly fit more than one role, you’re welcome to apply to up to three. This helps us match you with the right opportunity faster.

We review every application with equal care and will reach out if your profile aligns. Apply now with your CV in English.
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At Atolls, we want to ensure that all employees can thrive in an inclusive environment. Our employment opportunities are open to every gender, race, religion, age, sexual orientation, ability, place of origin, or socioeconomic status. We remain committed to a culture of diversity, equity and belonging, where all employees are welcomed, respected, connected, and engaged.