Core Software Engineer (C++) - Remote

ClickHouse, recognized on the 2025 Forbes Cloud 100 list, is a fast-growing private cloud company with more than 4,000 customers and ARR growth over 250% year over year. The company leads the market in real-time analytics, data warehousing, observability, and AI workloads, backed by a $400M Series D financing round. The Core Engineering teams own the heart of the ClickHouse Open Source project, and this role contributes to, analyzes, and optimizes the performance of the core ClickHouse database.

• Work on query optimization, distributed query optimization, relational operators (e.g., aggregation and joins), caching, and low-level optimizations like SIMD instructions.
• Ensure database performance does not deteriorate by extending existing and adding new performance tests based on real-world or synthetic datasets.
• Serve as a resource for the Support Engineering team, debugging advanced performance issues encountered by customers, including an on-call rotation and participation in external community support channels.
• Collaborate with other teams to assess the impact of new features on performance and reliability.
• Work with the open-source community, resolving issues, reviewing and finishing PRs, and answering questions across mail, chats, Google Groups, external Slack channels, etc.

• Solid professional software development experience in C++.
• Experience with Unix/Linux systems.
• Strong knowledge of database internals and design.
• Experience in performance engineering, ideally in a database, but other areas like high-frequency trading, simulation, or real-time data processing are acceptable.
• Strong communication, code review, problem-solving, and production debugging skills.

Bonus points for experience with ClickHouse, security/privacy/compliance, TCP/IP and network programming, cloud infrastructure services (preferably Kubernetes), public technical talks, and open-source contributions.

The typical starting salary for this role in the US is $141,000–$208,000 USD; in US Premium Markets (e.g., San Francisco Bay Area and New York City Metro Area) the range is $157,000–$230,000 USD. Perks include a flexible/remote-friendly work environment, employer contributions towards healthcare, equity in the form of stock options, flexible time off in the US, a $500 home office setup for remote employees, and company-wide offsites.