Senior Backend Engineer (Java, Kafka Streams, AWS)

• 7+ years of backend engineering experience
• Strong, current hands-on experience with Java and Spring Boot
• Deep practical experience with Kafka Streams in production, including stream-processing logic, joins, aggregations, windowing, state stores, or topology design
• Background in event-driven, distributed, or real-time systems
• Hands-on AWS experience, ideally with services such as EKS, S3, SQS, SNS, Kinesis, or Lambda
• Experience with Kubernetes, containers, and production deployment environments
• Good understanding of databases such as PostgreSQL, MongoDB, and Redis
• Strong production mindset: monitoring, debugging, reliability, performance, and incident investigation
• Ability to work independently in an evolving and not always fully documented technical environment
• Clear English communication skills and confidence explaining technical topics to both engineers and non-technical stakeholders

Nice to have:

• Kotlin experience
• Experience with high-throughput data processing or streaming platforms
• Terraform, Helm, Prometheus, Grafana, Micrometer, or similar observability tooling
• Experience in a small product team, scale-up, or ownership-heavy engineering environment
• Familiarity with AI-assisted development tools

• Build and evolve backend services using Java and Spring Boot
• Design and maintain real-time event-processing flows using Kafka Streams
• Work with stream-processing concepts such as topologies, transformations, joins, aggregations, stateful processing, and data routing
• Integrate external systems and infrastructure into a scalable internal platform
• Improve reliability, observability, and production readiness of services handling high-volume data
• Investigate production issues, performance bottlenecks, and data-flow problems
• Work with AWS, Kubernetes, PostgreSQL, MongoDB, Redis, Terraform, and Helm
• Contribute to code reviews, architecture decisions, documentation, and engineering standards
• Collaborate with product, platform, and engineering stakeholders across an international environment

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