{"id":3203378,"url":"https://alion.io/job/mercari-senior-machine-learning-engineer-recommendation-systems","title":"Senior Machine Learning Engineer - Recommendation Systems","company":{"id":914,"name":"Mercari","domain":"mercari.com","url":"https://alion.io/company/mercari","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"A","score":86,"open_postings":116,"ghost_share":0.147,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":92,"computed_at":"2026-10-30T05:48:23Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":24000,"max_usd":50000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":41},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"A/B Testing","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":"Scikit-learn","optional":false},{"name":"TensorFlow","optional":false}],"status":"live","first_seen_at":"2026-10-24T08:40:25Z","employer_posted_date":null,"last_verified_at":"2026-10-24T08:40:25Z","board_verified":false,"closed_at":null,"days_open":6,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":6},"description":"About Us : \n\nMercari is a Japan-based C2C marketplace company founded in 2013 with the mission to \"Create value in a global marketplace where anyone can buy & sell.\"\n\nOur Culture : \n\nTo achieve our mission at Mercari, our organization and each of our employees share the same values and perspectives : Go Bold, All for One, Be a Pro and Move Fast.\n\nRole Overview : \n\nWe're looking for a Senior Machine Learning Engineer to build and improve Mercari's recommendation systems, helping users discover items they'll love. You'll own the full ML lifecycle, from experimentation and modeling to deploying and monitoring large-scale production systems.\n\nBold Challenges : \n\n- Develop and optimize machine learning algorithms and models to enhance recommendation systems.\n\n- Collaborate with cross-functional teams to design solutions that improve user engagement.\n\n- Conduct data analysis and experimentation with large-scale data sets.\n\n- Utilize machine learning frameworks to deploy scalable recommendation solutions.\n\n- Monitor system performance and conduct A/B testing.\n\nRequirements : \n\n- 5+ years of professional experience in end-to-end development of large-scale ML systems in production.\n\n- Strong experience in ML solutions from experimentation to deployment, including MLOps.\n\n- Experience with ML frameworks (TensorFlow, PyTorch) and libraries (scikit-learn, NumPy, pandas).\n\n- Deep understanding of ML and software engineering fundamentals.\n\n- Experience with monitoring, logging, and production operations.\n\nBenefits : \n\n- Employment Status : Full-time.\n\n- Office Location : Bengaluru.\n\n- Hybrid Workstyle : 2 days Work From Office.\n\nSkills\nMachine Learning, Tensorflow, PyTorch, MLOps, Python, Scikit-Learn, Numpy, Pandas","description_format":"text","description_chars":1731,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Marketplaces","Secondhand"],"lifecycle":[{"event":"open","at":"2026-10-24T10:30:05Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":5,"expected_fill_days":92,"reasons":["seen:5","velocity","win:early","comp:brand"],"computed_at":"2026-10-30T05:48:23Z"},"pay":null,"html_url":"https://alion.io/job/mercari-senior-machine-learning-engineer-recommendation-systems","json_url":"https://alion.io/job/mercari-senior-machine-learning-engineer-recommendation-systems.json","meta":{"generated_at":"2026-10-30T14:13:35Z","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":1568,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-31T00:00:00Z"}},"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":914},"rest":"https://alion.io/mcp/rest/get_company?id=914"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmercari-senior-machine-learning-engineer-recommendation-systems"},{"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%2Fmercari-senior-machine-learning-engineer-recommendation-systems"},{"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%2Fmercari-senior-machine-learning-engineer-recommendation-systems"},{"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/mercari-senior-machine-learning-engineer-recommendation-systems\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmercari-senior-machine-learning-engineer-recommendation-systems"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3203378}},{"tool":"search_jobs","arguments":{"company":"mercari.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3203378},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); 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