{"id":9009,"url":"https://alion.io/job/rtb-house-senior-distributed-systems-engineer-tech-lead","title":"Senior Software Engineer / Tech Lead","company":{"id":1562,"name":"RTB House","domain":"rtbhouse.com","url":"https://alion.io/company/rtb-house","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":84,"open_postings":17,"ghost_share":0,"stale_share":0.647,"repost_share":0,"time_to_fill_p50_days":51,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":88000,"max_usd":147000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":34},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"DNS","optional":false},{"name":"gRPC","optional":false},{"name":"Java","optional":false},{"name":"Python","optional":false},{"name":"Aerospike","optional":true},{"name":"Apache Kafka","optional":true},{"name":"BigQuery","optional":true},{"name":"ClickHouse","optional":true},{"name":"ElasticSearch","optional":true},{"name":"GCP","optional":true},{"name":"Google BigQuery","optional":true},{"name":"Jenkins","optional":true},{"name":"Kubernetes","optional":true},{"name":"Memcached","optional":true},{"name":"MinIO","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Prometheus","optional":true}],"status":"live","first_seen_at":"2025-10-24T06:46:15Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-17T15:11:30Z","board_verified":true,"closed_at":null,"days_open":358,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":357},"description":"Location: Poland (Remote/Flexible)\nWe Are: \nRTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. \nWe are looking for Senior Engineers to support our Bidding Platform organization which is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. If you want to work on technically complex and demanding solutions, this is the opportunity for you!\nOur Senior Engineers are experts who combine deep technical expertise with a strong sense of ownership, and they take on Tech Lead roles in complex, cross-team projects.\nYou will:\nDesign and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics.\nImplement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards.\nProvide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews.\nRequirements:\nExcellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms.\nVery good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others).\nGood knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level).\nPractical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it).\nThe ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production).\nGeneral knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'.\nC1 level in English and Polish.\nNice to have:\nExperience in the AdTech/Real Time Bidding space.\nExperience contributing to Real User Monitoring (RUM) systems.\nSelected technologies used: \nJava, Python\nAerospike, Memcached\nGoogle Cloud Platform, BigQuery, MinIO\nKafka, Clickhouse\nPostgreSQL\nElasticsearch\nKubernetes, Prometheus\nJenkins, Graphite\nWe Offer:\nProjects focused on extreme performance and high code quality - clean code and solid code reviews are our standard.\nCollaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers).\nAccess to modern technologies and the opportunity to apply them in large-scale, high-impact projects.\nCooperation based on B2B contract.\nYou can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.\nApply now\nYou don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.","description_format":"text","description_chars":3522,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Machine Learning","Advertising","Marketing & Sales AI"],"lifecycle":[{"event":"open","at":"2025-10-24T06:46:15Z"}],"visa":[],"liveness":{"score":4,"band":"cold","label":"Long shot","p_open":1,"p_active":0.135,"p_room":0.28,"age_days":357,"expected_fill_days":51,"reasons":["conf:0","stale_co","velocity","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/rtb-house-senior-distributed-systems-engineer-tech-lead","json_url":"https://alion.io/job/rtb-house-senior-distributed-systems-engineer-tech-lead.json","meta":{"generated_at":"2026-10-17T17:54:11Z","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":488,"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":1562},"rest":"https://alion.io/mcp/rest/get_company?id=1562"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Frtb-house-senior-distributed-systems-engineer-tech-lead"},{"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%2Frtb-house-senior-distributed-systems-engineer-tech-lead"},{"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%2Frtb-house-senior-distributed-systems-engineer-tech-lead"},{"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/rtb-house-senior-distributed-systems-engineer-tech-lead\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frtb-house-senior-distributed-systems-engineer-tech-lead"}]}