Core Software Engineer (C++) - Remote

ClickHouse, recognized on the 2025 Forbes Cloud 100 list, is a fast-growing private cloud company specializing in real-time analytics and data warehousing. They are seeking a Core Software Engineer (C++) to contribute to the performance optimization of the ClickHouse database, ensuring its reliability and efficiency while working closely with the open-source community.

Responsibilities:

• As part of the ClickHouse Core teams, you will contribute to, analyze, and optimize the performance of the core ClickHouse database. The team works on many different topics 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 that the database performance does not deteriorate over time by extending existing and adding new performance tests, based on real-world or synthetic datasets
• You will serve as a resource for the Support Engineering team, helping to debug the most advanced performance issues encountered by our customers. This includes an on call rotation as well as participation in our external community support channels
• As the core ClickHouse database continues to move at a fast pace, you will closely collaborate with our other teams to assess the impact of new features on performance and reliability
• You will work with our open-source community. This will include resolving issues, reviewing and finishing PRs, answering questions from mail, chats, google groups, external Slack channels, etc

Requirements:

• Solid professional software development experience in C++
• Experience with Unix Systems
• Strong knowledge in database internals and design
• Experience in performance engineering, ideally in a database but other areas like high-frequency trading, simulation, real-time data processing etc. are also okay
• Ability to communicate well with others and work well within and across engineering teams
• Willingness to work closely with the open-source community
• Participation in code reviews with patience and attention to detail fostering a culture of collaboration and mutual respect
• Strong problem-solving skills and solid production debugging skills
• Passion for efficiency, availability, scalability, and data governance
• Ability to thrive in a fast-paced start-up environment
• High level of responsibility, ownership, and accountability
• 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