Senior Software Engineer

Summary

Join ClickHouse's Core Performance team as a C++ engineer to analyze and optimize the performance of the core ClickHouse database. You will work on query optimization, distributed query optimization, relational operators, caching, and low-level optimizations. Ensure database performance doesn't deteriorate by extending and adding performance tests. Serve as a resource for the Support Engineering team, debugging advanced performance issues. Collaborate with other core teams to assess the impact of new features on performance. Work with the open-source community, resolving issues, reviewing PRs, and answering questions. This fully remote role is based in the United Kingdom.

Requirements

• Bring along solid professional software development experience in C++. This includes experience with Unix Systems
• Have strong knowledge in database internals and design
• Have experience in performance engineering, ideally in a database but other areas like high-frequency trading, simulation, real time data processing etc. are also okay
• Communicate well with others and have the ability to work well within and across engineering teams
• Be ready to work closely with our open-source community. Participate in code reviews with patience and attention to detail fostering a culture of collaboration and mutual respect
• Be a strong problem-solver and have solid production debugging skills
• Be passionate about efficiency, availability, scalability and data governance
• Thrive in a fast-paced start-up environment, seeing yourself as a partner with the business with the shared goal of moving forward and building together
• Have a high level of responsibility, ownership, and accountability

Responsibilities

• Analyze and optimize 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 that the database performance does not deteriorate over time by extending existing and adding new performance tests, based on real-world or synthetic datasets
• Serve as a resource for the Support Engineering team, helping to debug the most advanced performance issues encountered by our customers
• Closely collaborate with our other core teams to assess the impact of new features on performance and support colleagues with performance tests and advice
• 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

Preferred Qualifications

• 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

Benefits

• Flexible work environment - ClickHouse is a globally distributed company and remote-friendly. We currently operate in 20 countries
• Healthcare - Employer contributions towards your healthcare
• Equity in the company - Every new team member who joins our company receives stock options
• Time off - Flexible time off in the US, generous entitlement in other countries
• A $500 Home office setup if you’re a remote employee
• Global Gatherings – We believe in the power of in-person connection and offer opportunities to engage with colleagues at company-wide offsites