{"id":95096,"url":"https://alion.io/job/rtb-house-senior-machine-learning-engineer-2","title":"Senior Machine Learning Engineer","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":"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":83000,"max_usd":145000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":45},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"C++","optional":false},{"name":"Flink","optional":false},{"name":"GCP","optional":false},{"name":"Hadoop","optional":false},{"name":"Java","optional":false},{"name":"Linux","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"PyTorch C++","optional":false},{"name":"Scala","optional":false},{"name":"Spark","optional":false},{"name":"TensorFlow","optional":false},{"name":"TensorFlow C++","optional":false}],"status":"live","first_seen_at":"2026-02-25T13:44:14Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-17T18:30:59Z","board_verified":true,"closed_at":null,"days_open":234,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":233},"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.\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.\nDesired Experience:\nExpertise in designing and implementing complex IT systems.\nAbility to develop user-friendly, versatile tools.\nProficiency in at least one programming language, such as Python, C++, Java, or Scala, along with expertise in Linux.\nStrong skills in evaluating and optimizing system performance, from initial design through to production troubleshooting.\nDeep understanding of algorithms and data structures.\nInitiative and creativity to improve existing solutions.\nAbility to work effectively both within and across teams.\nC1 level in Polish\nAdditional Advantages:\nPrevious experience in the field of Machine Learning is not required, but would be an asset.\nSolid foundation in mathematics.\nExperience with GPU programming and Machine Learning frameworks such as Torch, PyTorch, or TensorFlow.\nProven experience with distributed systems.\nFamiliarity with Big Data technologies such as Hadoop, Kafka, Storm, Spark, or Flink.\nHands-on experience with Google Cloud Platform (GCP) or similar cloud providers.\nWe Offer:\nThe opportunity to cooperate with a team of enthusiasts experienced in Machine Learning, Big Data, and distributed systems, who are eager to share their knowledge and skills.\nFlexible cooperate hours, with the possibility of remote cooperate or cooperate from our office in Warsaw.\nAccess to the latest technologies, with the opportunity to apply them in a large-scale and fast-paced project.\nAn opportunity to apply your expertise in optimizing algorithms that support hundreds of millions of internet users and billions of ad views per month within the RTB model.\nThe ability to see the immediate impact of your cooperate on the company's business outcomes.\nThe possibility of publishing 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.\nDaily Responsibilities:\nDeveloping and maintaining the ML training platform and the bidding infrastructure that evaluates ML models in the production environment.\nIdentifying performance bottlenecks and optimizing critical, low-level parts of the system.\nEnsuring the reliability and scalability of implementations, and creating performance and correctness tests for new system components.\nTesting and benchmarking open-source Big Data and ML technologies to assess their suitability for the production environment.\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":3284,"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":"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":"2026-02-25T13:44:14Z"}],"visa":[],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.191,"p_room":0.28,"age_days":233,"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-machine-learning-engineer-2","json_url":"https://alion.io/job/rtb-house-senior-machine-learning-engineer-2.json","meta":{"generated_at":"2026-10-17T18:33:19Z","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":1385,"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-machine-learning-engineer-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-engineer-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-engineer-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-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frtb-house-senior-machine-learning-engineer-2"}]}