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Backend Engineer, ClickHouseAiven · Helsinki, Uusimaa, Finland
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Aiven

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Backend Engineer, ClickHouse

🗓️ Posted 2026-09-16 Helsinki, Uusimaa, Finland Hybrid ICT
💰 Salary Not shared 📊 Market 4,500 EUR–7,000 EUR/mo

About the Company

We're a global team of over 400 people, working together to push the boundaries of open-source technology and multi-cloud solutions. Our vision is to help developers, builders, and creators bring their ideas to life with speed and simplicity, by providing a cloud data platform that makes open-source databases, search, streaming, and application infrastructure easily accessible to everyone. We're looking for a Backend Engineer to join our small, focused ClickHouse team. You'll work on the systems that power our managed ClickHouse service - building, scaling, and operating infrastructure that thousands of customers depend on daily. You'll write Python that orchestrates database lifecycle operations, dig into Linux internals when things get interesting, and ship features through a well-established CI/CD pipeline. You'll work in a modern async-first Python codebase alongside engineers who care about code quality, type safety, and automation. If you have experience with ClickHouse internals or C++ - even better. But what matters most is strong backend fundamentals and a genuine interest in databases and distributed systems.

Requirements

  • ● Solid Python development skills -- you write clean, production-grade Python and understand async patterns (asyncio, aiohttp)
  • ● Strong understanding of databases -- you know how relational and analytical databases work under the hood, not just how to query them
  • ● CI/CD experience -- you've built and maintained delivery pipelines, not just used them
  • ● Familiarity with automated testing -- unit, integration, and system tests are part of how you work
  • ● Experience with AI coding tools -- you actively use AI-assisted development in your workflow and understand how to get the most out of it
  • ● Distributed systems awareness -- you understand the challenges of running services across multiple nodes and regions
  • ● Fluent English -- written and verbal
  • ● ClickHouse experience -- operational knowledge, query optimization, or contributions to the project
  • ● Deep Linux knowledge (Fedora preferred) -- comfortable with systemd, process management, filesystem internals, and debugging at the OS level
  • ● C++ or C -- ability to read and contribute to database engine code
  • ● Cloud infrastructure experience (AWS, GCP, Azure) with Terraform or similar IaC tools
  • ● PostgreSQL operational experience
  • ● Software and network security knowledge
  • ● Small team, big impact. You're not a cog -- you'll shape the technical direction of a product used at scale.
  • ● Real engineering problems. Database orchestration, distributed systems, performance at scale -- not CRUD apps.
  • ● Modern tooling. Strict type checking, automated formatting, security scanning, and AI-assisted development are the norm, not aspirations.
  • ● Helsinki-based, hybrid. The team is in the office 3 times per week.
  • ● Participate in Aiven's equity plan.
  • ● Balance work and life with our hybrid work policy.
  • ● Choose the equipment you need to set yourself up for success.
  • ● Use your Professional Development Plan budget for learning opportunities.
  • ● Receive holistic wellbeing support through our global Employee Assistance Program.
  • ● Inquire about our Global Time Off Commitment (Parental and Sick Leave, as well as Personal Time)
  • ● Enjoy country-specific benefits for our global cast.