Core Software Engineer
Optimizes the performance of ClickHouse’s core distributed database through query tuning, low-level systems work, regression testing, and production debugging. Requires professional C++ and Unix experience, strong database internals knowledge, and performance engineering expertise.
About the job
Responsibilities
- Analyze and optimize the performance of the core ClickHouse database.
- Work on query optimization, distributed query optimization, relational operators such as aggregation and joins, caching, and low-level optimizations including SIMD instructions.
- Extend existing and add new performance tests using real-world and synthetic datasets to prevent database performance regression.
- Help Support Engineering debug advanced customer performance issues.
- Collaborate with core engineering teams to assess the performance impact of new features and provide testing and performance guidance.
- Engage with the open-source community by resolving issues, reviewing and completing pull requests, and answering questions across community channels.
- Participate in detailed, collaborative code reviews.
Requirements
- Solid professional software development experience in C++.
- Experience with Unix systems.
- Strong knowledge of database internals and design.
- Experience in performance engineering, ideally involving databases or other performance-sensitive systems.
- Strong communication, problem-solving, production debugging, ownership, and accountability skills.
- Ability to collaborate across engineering teams and with open-source communities.
Nice-to-haves
- Experience with ClickHouse.
- Experience in security, privacy, and compliance.
- Experience with TCP/IP and network programming.
- Experience developing cloud infrastructure services.
- Experience with Kubernetes.
- Public speaking at technical conferences or meetups.
- Contributions to open-source projects.
Compensation and Benefits
- Stock options.
- Employer healthcare contributions.
- Flexible time off, with country-specific entitlements.
- USD $500 home-office setup allowance for remote employees.
- Opportunities to attend company-wide global gatherings.
Skills
C++, Unix, Database Internals, Performance Engineering, Distributed Systems, Query Optimization, Simd, TCP/IP, Network Programming, Kubernetes, Cloud Infrastructure, Open Source
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