> Markdown version of [/jobs/ext/2857653-core-software-engineer-c](https://www.wearedevelopers.com/jobs/ext/2857653-core-software-engineer-c). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Core Software Engineer (C++) - **Company:** ClickHouse - **Location:** Germany (Remote available) - **Salary:** €195,000.0 - **Contract:** Permanent contract - **Skills:** Unix, C++ (Programming Language), Code Review, Databases, Data Governance, Software Debugging, High-Frequency Trading, Network Programming, Open Source Technology, Query Optimization, Software Engineering, TCP/IP, Cloud Platform System, Performance Testing, Database Performance, Kubernetes, Free and Open-Source Software, Vertica, Stream Processing - **Published:** September 12, 2026 - **Apply:** https://www.adzuna.de/details/5879936737 ## About the Role * You bring along solid professional software development experience in C++. This includes experience with Unix Systems. * You have strong knowledge in database internals and design. * You 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. * You communicate well with others and have the ability to work well within and across engineering teams. * You are ready to work closely with our open-source community. You participate in code reviews with patience and attention to detail fostering a culture of collaboration and mutual respect. * You are a strong problem-solver and have solid production debugging skills. * You are passionate about efficiency, availability, scalability and data governance. * You 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. * You have a high level of responsibility, ownership, and accountability. Bonus points for: * 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. ## Description * As part of the ClickHouse Core Performance team, you will 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. * As the core ClickHouse database continues to move at a fast pace, you will closely collaborate with our other core teams to assess the impact of new features on performance and support colleagues with performance tests and advice. * 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. ## Related Videos - [How building an industry DBMS differs from building a research one](https://www.wearedevelopers.com/videos/768-how-building-an-industry-dbms-differs-from-building-a-research-one) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [WeAreDevelopers LIVE - Node and Package Security](https://www.wearedevelopers.com/videos/2138-wearedevelopers-live-node-and-package-security) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) - [Modern Data Architectures need Software Engineering](https://www.wearedevelopers.com/videos/1030-modern-data-architectures-need-software-engineering) - [The Time Paradox: Building Timezone-Safe Python/Django Applications](https://www.wearedevelopers.com/videos/1915-the-time-paradox-building-timezone-safe-python-django-applications) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [Top 6 Hackathons for Developers in 2023](https://www.wearedevelopers.com/magazine/263-top-6-hackathons-for-developers-in-2023)