Senior Distributed Systems Engineer / Tech Lead

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RTB House seeks Senior Engineers for its Bidding Platform organization, processing over 20 million requests per second globally. Responsibilities include designing and leading system changes for high performance and scalability, developing tools to improve user performance metrics, implementing and maintaining HTTP/gRPC services and batch jobs in Java and Python, and providing technical leadership including project planning and code reviews. Requirements include deep understanding of IT systems, internet protocols, concurrent programming, production system monitoring, performance analysis, knowledge of high scalability and availability, and C1 level English and Polish. Nice to have experience in AdTech/Real Time Bidding and Real User Monitoring systems. Technologies used include Java, Python, Aerospike, Memcached, Google Cloud Platform, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, and Graphite. The role offers B2B contract cooperation, remote work or office presence in Warsaw or Cracow, and collaboration in interdisciplinary teams focused on high code quality and performance.