Staff Software Engineer-ClickHouse Committer

Lever, Inc.; Deutschland; Remote; EUR 120.000 - 180.000; Vollzeit

Zusammenfassung

Lever, Inc. is seeking an experienced Staff Software Engineer to contribute to ClickHouse internals and PostgreSQL ecosystem integrations. The role focuses on real-time analytics, distributed systems, and open-source collaboration.

You will work remotely within the EMEA region, taking ownership of complex features, optimizing performance, and collaborating with senior engineers across CI/CD and testing workflows.

Qualifikationen

• 5+ years of experience developing database internals.
• Upstream contributions or commits to ClickHouse.
• Deep expertise in at least one systems programming language (C/C++/Rust/Go).
• Strong understanding of database principles, algorithms, data structures, and OS internals.
• Experience with distributed query optimizers (Orca or similar).
• Proven experience optimizing analytical DB systems.

Aufgaben

• Design, develop, and maintain database features for ClickHouse and real-time analytics.
• Contribute to analytics products and PostgreSQL ecosystem integrations.
• Maintain high standards for stability, reliability, and scalability.
• Review code contributions and provide feedback to peers.
• Write and expand regression tests for fixes and features.
• Investigate and resolve complex database, networking, and software issues.
• Identify performance bottlenecks and optimize analytics workloads.
• Collaborate on CI/CD pipelines and upstream ClickHouse.

Kenntnisse

Systems programming

C/C++/Rust/Go

PostgreSQL internals

Open-source contributions

Linux development

Tools

ClickHouse

PostgreSQL

GitHub Actions

CI/CD

Jobbeschreibung

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Software Engineer – ClickHouse Committer based in Germany.

This is a fully remote EMEA opportunity focused on advanced database engineering and real-time analytical workloads.
You will contribute directly to the evolution of analytics technologies, with a particular focus on ClickHouse and its integration with the PostgreSQL ecosystem.
The role combines systems programming, database internals, performance engineering, troubleshooting, and open-source development.
You will have significant technical ownership, contributing upstream while helping shape production-grade analytics products and tools.
The position involves close collaboration with experienced engineers through code reviews, testing, CI/CD, and feature development.
You will work on technically demanding challenges involving distributed systems, query processing, database performance, and reliability.
This role is particularly suited to an experienced engineer who is passionate about open-source databases and deep systems-level engineering.

Accountabilities

• Design, develop, and maintain database features and tooling, with a particular focus on ClickHouse and real-time analytical workloads.
• Contribute to analytics products and integrations across the broader PostgreSQL ecosystem, including database extensions, accelerators, migration tooling, monitoring capabilities, and performance optimizations.
• Implement new functionality while maintaining high standards for software stability, reliability, scalability, and maintainability.
• Review and refine code contributions from other engineers, providing constructive technical feedback and helping maintain strong engineering standards.
• Write, maintain, and expand regression tests covering bug fixes, new functionality, and critical database behavior.
• Investigate and resolve complex database, networking, and software-related issues.
• Identify performance bottlenecks and implement optimizations for analytical database workloads.
• Work with CI/CD pipelines to support reliable integration, testing, and deployment processes.
• Contribute upstream to the ClickHouse open-source project and participate in the wider open-source database ecosystem.
• Collaborate with engineering colleagues on technical design, implementation, troubleshooting, and continuous improvement.

Requirements

• 5+ years of experience developing database internals, preferably with PostgreSQL or comparable database technologies.
• Demonstrated upstream contributions or commits to the ClickHouse open-source project.
• Deep expertise in at least one systems programming language, such as C, C++, Rust, or Go.
• Strong understanding of database principles, algorithms, data structures, and operating system internals.
• Experience working with distributed query optimizers, such as Orca or comparable technologies.
• Proven experience optimizing the performance of analytical database systems.
• Strong Linux development and debugging skills.
• Excellent problem-solving abilities, particularly when diagnosing complex database and systems issues.
• Strong written and verbal communication skills and the ability to collaborate effectively with technical peers.
• Experience with analytical libraries or databases such as Spark, DataFusion, or DuckDB is a plus.
• Experience with massively parallel processing (MPP) systems such as Greenplum is a plus.
• Solid knowledge of PostgreSQL internals is an advantage.
• Familiarity with machine learning libraries and techniques is beneficial.
• Knowledge of GitHub Actions and CI/CD workflows is a plus.