Senior Backend Engineer, Klar

• You are a senior engineer with experience in architecture, design, implementation and deployment of business critical systems
• AI Coding Tools: Proven proficiency in leveraging modern AI development workflows to accelerate delivery and maintain code quality. You should be a 'power user' of tools such as Claude Code, GitHub Copilot (Agent Mode) or Cursor
• Modern Java: Deep expertise in Java (21+) and the Spring Boot ecosystem
• You are passionate about simplifying complex problems with innovative solutions which increases efficiency and saves cost
• Experience with PostgreSQL or other relational databases, Apache Kafka, Docker
• At least 5 years of experience with microservice architectures, synchronous REST communication over HTTP, and asynchronous communication over Apache Kafka
• Deep understanding of database transactions and locking mechanisms
• Knowledge of algorithms and data structure for distributing loads like sharding, leadership election, and more

Desirable

• We’re looking for a Senior Backend Engineer to join one of our core teams at Klar, where you’ll help build the systems powering the future of digital banking
• You’ll be working on scalable, high-impact backend services that are central to our platform
• From designing robust architectures to improving system performance, your work will directly contribute to making digital banking more efficient and accessible
• Write correct, efficient, clean, robust, and maintainable code (Mostly in Java 21+)
• Write unit, integration, and end-to-end tests to prevent current errors or future regressions
• Participate in code review to learn from others and to teach them as well
• Prototype new technologies and libraries that could save time and effort
• Write clear and concise documentation for users of your systems
• Identify common problems between multiple systems and develop common solutions via libraries
• Create designs for new systems and features of moderate complexity
• Make time estimates to implement designs that can aid in future planning
• Work on core systems with real business impact
• Collaborate with a highly skilled, international team
• Take ownership of meaningful technical challenges
• Contribute to a product that’s transforming financial services
• Mentor junior engineers