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ClickHouse Logo ClickHouse · IT - Software Development

Core Software Engineer (C++)

United Kingdom · Job Posted December 07, 2025
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Job Description

ClickHouse is seeking exceptional C++ engineers to join their remote-first, global team to scale and grow both open source and ClickHouse Cloud offerings. The Performance Engineering team focuses on optimizing the performance of distributed systems.

Job Responsibility

  • analyze and optimize the performance of the core ClickHouse database
  • ensure database performance does not deteriorate over time by extending existing and adding new performance tests
  • serve as a resource for the Support Engineering team, helping to debug the most advanced performance issues
  • collaborate with other core teams to assess the impact of new features on performance
  • work with open-source community including resolving issues, reviewing PRs, answering questions

Requirements

  • solid professional software development experience in C++
  • experience with Unix Systems
  • strong knowledge in database internals and design
  • experience in performance engineering
  • ability to work well within and across engineering teams
  • ready to work closely with open-source community
  • strong problem-solver and solid production debugging skills
  • passionate about efficiency, availability, scalability and data governance
  • thrive in a fast-paced start-up environment
  • high level of responsibility, ownership, and accountability

Nice to have

  • Experience with ClickHouse
  • Experience in security, privacy, and compliance
  • Experience with TCP/IP and network programming
  • Experience developing cloud infrastructure services, preferably with Kubernetes
  • Experience giving public talks at technical conferences and meetups
  • Previous contributions to open source projects

What we offer

  • Flexible work environment
  • Healthcare - Employer contributions towards your healthcare
  • Equity in the company
  • Time off
  • A $500 Home office setup if you’re a remote employee
  • Global Gatherings
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  • Experience with Unix/Linux Systems
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  • Contribute to, analyze, and optimize the performance of the core ClickHouse database
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