Staff Software Engineer-ClickHouse Committer

Lever, Inc.; España; A distancia; EUR 100.000 - 140.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Health & wellness resources

Wellness Fridays

EMEA remote work

Descripción de la vacante

Lever, Inc. is seeking a Staff Software Engineer with deep experience in database internals, focusing on ClickHouse and its integration with the PostgreSQL ecosystem. This fully remote role operates across the EMEA region, offering significant ownership over analytics features and performance improvements.

You will work on distributed systems, query processing, and production-grade analytics tooling, collaborating with senior engineers through reviews, testing, and CI/CD pipelines.

Formación

• 5+ years building database internals, preferably PostgreSQL or similar.
• Contributed upstream to ClickHouse or equivalent open-source projects.
• Expert in systems programming languages (C, C++, Rust, or Go).
• Strong knowledge of database principles, algorithms, and OS internals.
• Experience with distributed query optimizers (Orca or similar).
• Proven performance optimization for analytical DBs.
• Strong Linux development and debugging skills.
• Excellent problem-solving and collaboration skills.

Responsabilidades

• Design and maintain ClickHouse features for real-time analytics.
• Contribute integrations across the PostgreSQL ecosystem.
• Ensure stability, reliability, and performance.
• Review code contributions and provide feedback.
• Write regression tests for fixes and features.
• Investigate complex database and networking issues.
• Optimize performance of analytical workloads.
• Collaborate on CI/CD pipelines and upstream contributions.

Conocimientos

Database internals

PostgreSQL expertise

ClickHouse

C/C++

Rust

Go

Linux development

CI/CD

Distributed systems

Performance tuning

Herramientas

GitHub Actions

CI/CD pipelines

Orca

Descripción del empleo

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 Spain.

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.
• Contributions to other open-source database projects are an advantage.
• Comfortable working independently in a fully distributed, remote engineering environment.

Benefits

• 100% remote work within the EMEA region.
• Opportunity to work on advanced open-source database and analytics technologies.
• Significant technical ownership and opportunities to contribute directly to the ClickHouse ecosystem.
• Collaboration with experienced engineers working on database internals, analytics, distributed systems, and performance engineering.
• Access to health and wellness resources, including CuraLinc.
• Wellness Fridays available through December 2026.
• Additional region-specific benefits and perks depending on location.
• Inclusive, collaborative, and globally distributed work environment.
• Opportunities to contribute to open-source projects and build expertise in large-scale data and analytics systems.