Who you are - 5+ years of software development experience focusing on building and delivering high-quality, data-intensive solutions - Strong proficiency in Java and the JVM ecosystem, including deep knowledge of memory management, garbage collection tuning, and performance profiling - Solid experience with concurrent programming in Java, including threads, executors, and reactive or asynchronous patterns - Experience developing, extending, or working with connectors, sinks, or sources for at least one big data processing framework such as Apache Spark, Flink, Beam, or Kafka Connect - Strong understanding of database fundamentals: SQL, data modeling, query optimization, and familiarity with OLAP/analytical databases - Outstanding written and verbal communication skills to collaborate effectively within the team and across engineering functions - Passion for open-source development: actively engaging with the OSS community, advocating for users, and influencing the evolution of the core system through your contributions - Prior contributions to open-source projects - Familiarity with ClickHouse or similar high-performance data platforms - Expertise in building sinks or source connectors for big data frameworks - Working knowledge of Python, especially in data engineering contexts (e.g., Pandas, PySpark, Airflow), and ability to contribute to Python tooling when needed - Understanding of JDBC, network protocols (TCP/IP, HTTP), and techniques for optimizing data throughput over the wire ### What the job involves - As a Senior Software Engineer specializing in JVM-based frameworks, you'll serve as a core contributor, owning and maintaining critical parts of ClickHouse's Data engineering ecosystem - This role sits at the intersection of high-performance database engineering and developer experience, where you'll craft tools that enable Data Engineers to harness ClickHouse's incredible speed and scale - You'll own the full lifecycle of data framework integrations—from the core database driver that handles billions of records per second, to SDKs and connectors that make ClickHouse feel native in JVM-based applications - This isn't just about writing code; you're building the foundation that thousands of Data engineers rely on for their most critical data workloads - Your work will directly impact how companies process massive datasets, from real-time analytics platforms ingesting millions of events per second to observability systems monitoring global infrastructure - You'll collaborate closely with the open-source community, internal teams, and enterprise users to ensure our JVM integrations set the standard for performance, reliability, and developer experience ### Benefits - Flexible work environment - ClickHouse is a distributed company offering both office based and remote work options (your choice!). We do not check when you log in or out. You are the owner of your calendar because work-life balance is important to us - Employer contributions towards your healthcare - Equity - Any new team member who joins our company is eligible to receive stock options - Our competitive time-off policy complies with all local country laws at a minimum of given time off + all paid bank holidays - Home office setup allowance for our remote employees