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Senior Software Engineer - JVM Language Clients

2 hours, 54 minutes ago
Germany
Full-time
Senior
Backend Engineer
Software Development
Apache Spark C# C++ ClickHouse dbt Go Java JavaScript Kafka Microservices Python REST API Rust SQL
Apply Now
ClickHouse

ClickHouse

ClickHouse provides a fast open source column-oriented database management system that enables users to generate real-time analytical data reports through SQL queries, catering to the needs of industries requiring efficient data processing and analysis.

IT Services
51-250
Founded 2021
$300M raised
View All Jobs 165

Description

  • Own the Java client and JDBC driver end-to-end, including roadmap, API design, performance, release engineering, and partner-facing support.
  • Improve throughput and latency across the client and ClickHouse server.
  • Partner daily with the Connectors team to understand driver requirements and ship updates that support downstream connectors.
  • Work directly with external partners on interoperability, regressions, and roadmap alignment.
  • Deliver measurable improvements in throughput, stability, and developer experience.
  • Review feedback from engineers and use it to guide the next priorities for the driver.
  • Contribute written proposals, design docs, and RFCs to shape investment decisions and technical direction.

Requirements

  • 5+ years of software engineering experience, with significant focus on data-intensive systems such as drivers, SDKs, ingestion, CDC, streaming, or analytics.
  • Deep Java and JVM expertise, including memory model, GC tuning, profiling, and reasoning about throughput and latency at the byte level.
  • Hands-on experience building or substantially extending a library used by other engineers.
  • Strong understanding of database fundamentals, including SQL, query execution, and analytical/OLAP workloads.
  • Solid knowledge of JVM concurrency patterns, including executors, reactive streams, backpressure, and connection pooling.
  • Thoughtful, transparent use of modern AI development tools such as Claude Code, Cursor, or Copilot, combined with strong independent design and code review judgment.
  • Excellent written communication skills for design docs, PR descriptions, and RFCs.
  • Comfort working in the open with community issues, external contributors, and public design discussions.
  • Working knowledge of JDBC internals, ADBC, or Arrow / Arrow Flight SQL is preferred.
  • Experience designing or evolving wire protocols, or contributing to a widely used network client, is preferred.
  • Prior contributions to open-source data infrastructure such as Kafka, Spark, Flink, dbt, Debezium, or Iceberg are preferred.
  • Working knowledge of ClickHouse or another columnar/OLAP engine is preferred.

Benefits

  • Competitive salary with location-based premium market ranges in some areas.
  • Employer contributions toward healthcare.
  • Equity in the company through stock options for new team members.
  • Flexible time off in the US and generous time off in other countries.
  • $500 home office setup support for remote employees.
  • Remote-friendly, globally distributed work environment operating in over 20 countries.
  • Opportunities to attend company-wide global gatherings and offsites.

Interested in this position?

Apply directly on the company website

Apply Now

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