About the job
About ClickHouse
ClickHouse, a trailblazer in the private cloud sector, has been recognized on the prestigious 2025 Forbes Cloud 100 list. With an impressive growth trajectory, boasting over 3,000 clients and an astonishing 250% year-over-year ARR increase, ClickHouse stands at the forefront of real-time analytics, data warehousing, observability, and AI workloads.
The company's exceptional growth was recently underscored by a $400 million Series D funding round. In recent months, notable clients, including Capital One, Lovable, Decagon, Polymarket, and Airwallex, have either adopted or expanded their use of our platform, joining industry giants like Meta, Cursor, Sony, and Tesla.
Our mission is to revolutionize the way businesses leverage data. Join us on this exciting journey!
NOTE: This position can be filled from any location where ClickHouse is authorized to hire.
With over 42,000 stars on GitHub, ClickHouse is celebrated as the fastest and most resource-efficient open-source database designed for real-time applications and analytics. Our Core Engineering teams are responsible for the core of the ClickHouse Open Source project. We are in search of exceptional C++ engineers to join our globally distributed, remote-first team, contributing to the scaling and growth of both our open-source and ClickHouse Cloud offerings. Specifically, our Performance Engineering team seeks engineers passionate about optimizing the performance of distributed systems.
Your Responsibilities:
- As a member of the ClickHouse Core Performance team, you will analyze and enhance the performance of the core ClickHouse database, focusing on areas such as query optimization, distributed query optimization, relational operators (e.g., aggregation and joins), caching, and low-level optimizations like SIMD instructions.
- You will ensure sustained database performance by extending existing performance tests and introducing new ones based on real-world or synthetic datasets.
- You will act as a resource for the Support Engineering team, assisting in troubleshooting advanced performance issues experienced by our customers.
- As the core ClickHouse database evolves rapidly, you will collaborate closely with other core teams to evaluate the impact of new features on performance and provide support with performance tests and guidance.
- You will engage with our open-source community, addressing issues, reviewing pull requests, and responding to inquiries across various communication channels.

