Senior Backend Engineer (m|w|d) - Java/Kotlin, AWS, Kafka

Team CRM Tech is responsible for delivering the technical infrastructure that enables idealo's CRM campaigns. They build and maintain systems that handle identity resolution, subscriptions, data flows, and message delivery, while ensuring GDPR compliance and supporting personalized user experiences.

About your new role Design, implement, and maintain reliable and scalable software systems and data flows for CRM and user engagement use cases. Collaborate with Software Engineers, Data Engineers, Product Managers, and other stakeholders to deliver robust solutions that integrate across domains and teams.

Contribute to the team’s architecture and technical decision-making, ensuring high code quality and operational excellence. Take ownership of services throughout their lifecycle, from design and implementation to monitoring and improvement.

Ensure best practices for testing, CI/CD, and cloud infrastructure are applied and continuously improved. Support and mentor less experienced engineers by sharing knowledge, conducting code reviews, and fostering a collaborative team culture.

Explore and adopt new tools and technologies to improve development efficiency and system performance. Skills & Requirements Strong experience in backend development with Java (Spring Boot) or Kotlin. Solid understanding of cloud - based architectures, preferably on AWS (e. g. Lambda, S3, Glue, SNS/SQS).

Hands-on experience with CI/CD pipelines, infrastructure as code (e. g. AWS CDK, Terraform) , and monitoring. Familiarity with event-driven systems and tools such as Kafka , as well as microservice architectures. Good knowledge of SQL and experience handling structured and semi-structured data.

Nice-to-have: Experience working with data pipelines, APIs, and data integration processes (schemas, transformations, ETL). Experience with TypeScript or Snowflake. Experience with AI/LLM-assisted engineering (Claude, ChatGPT). At id