Senior Distributed Systems Engineer - Platform Engineering

Location: Poland (Remote/Flexible) We Are: RTB House is a next-generation performance demand-side platform (DSP) that uses proprietary Deep Learning AI algorithms to help brands grow. The company is the market leader in driving performance using Deep Learning across the entire purchase funnel. Founded in 2012 and now operating in 90+ markets, RTB House has always been private-by-design. It embraces first-party advertising and a relentless approach to innovation. RTB House offers end-to-end Deep Learning-powered AdTech products and solutions to maximize conversion, drive new customer acquisition, create engagement, and fuel long-term demand for a global base of clients. In 2026, RTB House launched rtb.com, a self-service platform specifically designed to allow small and medium-sized businesses and agencies to deploy auto-built creatives and maximize performance on any budget. Our Platform Engineering team, within the Bidding Platform structure, is looking for engineers with a strong interest in system-related topics (deployment, monitoring, databases, load balancing), as well as experience in leading the specification and development of complex projects and coordinating the work of others. If you want to work on technically challenging and sophisticated solutions, this is the opportunity for you! You Will: Plan and then hands-on lead further development within a given technical area like deployment, monitoring, databases or load balancing, in the context of existing infrastructure within RTB House; Coordinate the work of a project team of 3-4 people, also making arrangements with other teams and units within RTB House; Ensure the reliability and scalability of the solutions built. Desired Experience: Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms; Ability to proactively define requirements, ask appropriate questions and draw conclusions that will combine technical constraints and business needs; Ability to lead the design and implementation of a solution; Experience in leading project teams; Willingness to be involved in topics that go beyond programming and design, such as responsibility for technical areas or communication with other teams; Proactive attitude, independence in taking action; Extensive experience in programming and readiness to implement key system elements as well as involvement in code reviews; Good knowledge of methods of creating concurrent programs and distributed systems; Ability to critically analyze created solutions in terms of performance (from estimating the theoretical performance of designed systems to detecting and removing actual performance problems in production); C1 level in English and Polish. Selected technologies used: Java, Python Kubernetes, Prometheus Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Jenkins, Graphite We Offer: Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard; Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers); Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects; Cooperation based on B2B contract; You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.