{"id":95095,"url":"https://alion.io/job/rtb-house-senior-machine-learning-researcher-2","title":"Senior Machine Learning Researcher","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":83,"open_postings":13,"ghost_share":0,"stale_share":0.692,"repost_share":0,"time_to_fill_p50_days":52,"computed_at":"2026-10-25T05:49:26Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","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":84000,"max_usd":148000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":44},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"A/B Testing","optional":false},{"name":"Java","optional":false},{"name":"Machine Learning","optional":false},{"name":"NumPy","optional":false},{"name":"Pandas","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"Recommender Systems","optional":false},{"name":"Scala","optional":false},{"name":"Transfer Learning","optional":true}],"status":"live","first_seen_at":"2026-02-16T08:06:42Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-26T00:40:26Z","board_verified":true,"closed_at":null,"days_open":251,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":250},"description":"Location: Poland\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. As an ML Researcher, you will be responsible for its development.\nFounded in 2012, and now operating in 90+ markets, RTB House has always been private-by-design. It embraces first-party advertising and a relentless approach to innovation. RTB House offers end-to-end Deep Learning-powered AdTech products and solutions to maximize conversion, drive new customer acquisition, create engagement, and fuel long-term demand for a global base of clients.\n\nYou Will:\n\nDesigning and implementing models, most often of deep neural networks, used to predict the behavior and preferences of Internet users\nAnalysis of the latest works in the field of Machine Learning\nConducting and analyzing A/B tests of new solutions\nDeveloping and testing new approaches to modeling key issues, such as bidding in first-price auctions\nDesired Experience:\n\n4+ years of hands-on experience with Machine Learning / Data Science \nInterest and willingness to constantly develop in the area of Machine Learning\nKnowledge of statistics and probability\nProficiency in programming\nC1 level in Polish\nSelected technologies used:\nPython, Java, Scala\nPyTorch, NumPy, Pandas\nJupyter Notebooks\nAdditional advantages will be:\nExperience in the ML industry\nExperience in designing recommendation systems\nPractical knowledge of the tools we use\nSample topics:\nImplementation and analysis of new model architectures, such as convolutional networks, transformer\nAnalyze the difference in the distribution of training and production data. Estimating the scale of the problem, identifying the best solution, analysis, implementation, deployment\nExperiments with the use of transfer learning\nA completely new approach to generating product recommendations that is free from proxy targets and uses contrastive loss function\nWe Offer:\nCooperate in a team of enthusiasts with experience in machine learning who willingly share their knowledge and skills\nExtremely flexible cooperation conditions - you cooperate when it is convenient for you and devote as much time as you can; you can cooperate fully remotely\nAccess to the latest technologies and the possibility of real use of them in a large-scale and highly dynamic project;\nPossibility of using the possessed knowledge and competences in practical applications - while optimizing algorithms supporting hundreds of millions of Internet users and monthly buyers of billions of advertising views in the RTB model, based on extensive data sets\nThe effects of your cooperate immediately visible in the company's business results\nPossibility to publish your results\nCooperation based on B2B contract or Contract of Mandate \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 digital marketing, send us your CV, and we'll review it.","description_format":"text","description_chars":3217,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"Polish","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":"2026-02-16T08:06:42Z"}],"visa":[],"liveness":{"score":6,"band":"cold","label":"Long shot","p_open":1,"p_active":0.223,"p_room":0.28,"age_days":250,"expected_fill_days":52,"reasons":["conf:0","stale_co","velocity","win:tail","crowd:"],"computed_at":"2026-10-25T05:49:26Z"},"pay":null,"html_url":"https://alion.io/job/rtb-house-senior-machine-learning-researcher-2","json_url":"https://alion.io/job/rtb-house-senior-machine-learning-researcher-2.json","meta":{"generated_at":"2026-10-26T03:46:45Z","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":5123,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"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-machine-learning-researcher-2"},{"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-machine-learning-researcher-2"},{"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-machine-learning-researcher-2"},{"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-machine-learning-researcher-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frtb-house-senior-machine-learning-researcher-2"}]}