{"id":2303780,"url":"https://alion.io/job/aiven-backend-engineer-clickhouse","title":"Backend Engineer, ClickHouse","company":{"id":40678,"name":"Aiven","domain":"aiven.io","url":"https://alion.io/company/aiven","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":75,"open_postings":9,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":45,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Helsinki, Finland"],"countries":["FI"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":58000,"max_usd":116000,"period":"year","method":"role_country_seniority_unknown","sample_n":37},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Aiohttp","optional":false},{"name":"Asyncio","optional":false},{"name":"Buildkite","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"ClickHouse","optional":false},{"name":"FastAPI","optional":false},{"name":"GitHub Actions","optional":false},{"name":"Linux","optional":false},{"name":"Python","optional":false},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"Fedora","optional":true},{"name":"GCP","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-07-28T12:14:44Z","employer_posted_date":"2026-09-16","last_verified_at":"2026-10-17T01:37:28Z","board_verified":true,"closed_at":null,"days_open":80,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":80},"description":"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. \nThe Role\nWe'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.\nYou'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.\nIf 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.\nWhat You'll Do\nDesign, build, and maintain backend services in Python (FastAPI, asyncio, psycopg2) that manage the ClickHouse service lifecycle\nWork with CI/CD pipelines (Buildkite, GitHub Actions) to ship code reliably and often\nInvestigate and resolve production issues across the stack - from Python application code down to Linux system behavior\nContribute to technical planning within a small team where your input directly shapes the roadmap\nWrite well-tested, type-checked code and participate in thorough code reviews\nUse AI coding tools as part of your daily workflow to accelerate development\nWhat We're Looking For\nMust have:\nSolid Python development skills -- you write clean, production-grade Python and understand async patterns (asyncio, aiohttp)\nStrong understanding of databases -- you know how relational and analytical databases work under the hood, not just how to query them\nCI/CD experience -- you've built and maintained delivery pipelines, not just used them\nFamiliarity with automated testing -- unit, integration, and system tests are part of how you work\nExperience with AI coding tools -- you actively use AI-assisted development in your workflow and understand how to get the most out of it\nDistributed systems awareness -- you understand the challenges of running services across multiple nodes and regions\nFluent English -- written and verbal\nNice to have:\nClickHouse experience -- operational knowledge, query optimization, or contributions to the project\nDeep Linux knowledge (Fedora preferred) -- comfortable with systemd, process management, filesystem internals, and debugging at the OS level\nC++ or C -- ability to read and contribute to database engine code\nCloud infrastructure experience (AWS, GCP, Azure) with Terraform or similar IaC tools\nPostgreSQL operational experience\nSoftware and network security knowledge\nWhy This Role\nSmall team, big impact. You're not a cog -- you'll shape the technical direction of a product used at scale.\nReal engineering problems. Database orchestration, distributed systems, performance at scale -- not CRUD apps.\nModern tooling. Strict type checking, automated formatting, security scanning, and AI-assisted development are the norm, not aspirations.\nHelsinki-based, hybrid. The team is in the office 3 times per week.\nAmazing! What’s next:\nIf you think Aiven is the place for you and that ourValues align with yours, send us your resume and we’ll get in touch!\nGlobal Benefits:\nOur global benefits are designed to help you thrive and grow, personally and professionally:\nParticipate in Aiven’s equity plan.\nBalance work and life with our hybrid work policy.\nChoose the equipment you need to set yourself up for success.\nUse your Professional Development Plan budget for learning opportunities.\nReceive holistic wellbeing support through our global Employee Assistance Program.\nInquire about our Global Time Off Commitment (Parental and Sick Leave, as well as Personal Time)\nEnjoy country-specific benefits for our global cast.\nHow to Recognize and Avoid Employment Scams:\nThere has been a rise in fake job postings used by scammers to get personal information. At Aiven, all of our emails relating to recruitment come from an @aiven.io, @greenhouse.io or @eu.greenhouse.io domain and all of our interviews are conducted by video call or in person. Our interviews will never occur via text or chat. If you’re unsure of the legitimacy of a job opportunity/offer pertaining to Aiven, please don’t hesitate to reach out to us at .\nEqual Opportunities:\nAiven provides equal employment opportunities to all qualified employees and applicants for employment without regard to age, gender identity, national or ethnic origin, religion, sexual orientation, physical and mental ability, marital and family status or without regard to any other similar personal attributes. Aiven complies with applicable local laws governing non-discrimination in employment in every location in which the company operates. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, transfer, leaves of absence, compensation, training and any other terms and conditions related to employment.\nAt Aiven we are committed to providing reasonable accommodations for qualified individuals with disabilities or special needs in our working environment and job application procedures. We make all reasonable accommodations for persons with disabilities or who otherwise need support to thrive in the workplace. We are committed to continuously improving workplace accessibility. There is an option to request a discussion in the application process but if you have any questions before applying please write to us at .","description_format":"text","description_chars":5926,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"phd","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Equity","Hybrid work","Professional development"],"hiring_locations":[{"name":"Finland","iso":"FI","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cloud Platforms (IaaS & PaaS)","Databases & DBMS"],"lifecycle":[{"event":"open","at":"2026-10-11T22:04:07Z"}],"visa":[],"liveness":{"score":15,"band":"cold","label":"Long shot","p_open":1,"p_active":0.428,"p_room":0.36,"age_days":79,"expected_fill_days":45,"reasons":["conf:1","velocity","win:tail","crowd:"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/aiven-backend-engineer-clickhouse","json_url":"https://alion.io/job/aiven-backend-engineer-clickhouse.json","meta":{"generated_at":"2026-10-17T03:33:50Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":4670,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":40678},"rest":"https://alion.io/mcp/rest/get_company?id=40678"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Faiven-backend-engineer-clickhouse"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Faiven-backend-engineer-clickhouse"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Faiven-backend-engineer-clickhouse"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/aiven-backend-engineer-clickhouse\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Faiven-backend-engineer-clickhouse"}]}