{"id":2908201,"url":"https://alion.io/job/thefrenchsourcer-machine-learning-engineer","title":"Machine Learning Engineer","company":{"id":4451662,"name":"The French Sourcer","domain":"thefrenchsourcer.com","url":"https://alion.io/company/thefrenchsourcer","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Manatal","truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":"middle","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":53000,"max_usd":118000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":8},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"A/B Testing","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"TensorFlow","optional":false}],"status":"live","first_seen_at":"2026-10-20T08:38:43Z","employer_posted_date":"2026-10-20","last_verified_at":"2026-10-25T01:07:25Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"Take recommendation models from notebook to production, serving millions of users in real time.\nMachine Learning Engineer - Paris\nParis, France · Permanent · Hybrid working policy to be confirmed\nWhat you'd actually work on\nBuilding and maintaining recommendation and ranking models used across core product surfaces\nOwning the ML lifecycle from feature preparation and training to deployment and production monitoring\nDesigning offline evaluation methods that reflect the behaviour expected in production\nBuilding training and retraining pipelines that can run reliably without manual intervention\nDeploying models through scalable, low-latency production services\nDesigning A/B tests and defining the metrics used to assess model performance and business impact\nWorking with data engineers to make production features reliable, consistent, and available at the required frequency\nMonitoring model performance, feature quality, drift, latency, and prediction distributions\nInvestigating differences between offline results and production behaviour\nImproving model deployment, versioning, rollback, and reproducibility\nPartnering with product teams to translate business objectives into measurable optimisation problems\nContributing to code reviews, automated testing, CI/CD, and ML engineering standards\nWhere it gets technically interesting\nServing real-time features and predictions within strict latency requirements\nMaintaining consistency between offline training data and online production features\nAutomating retraining pipelines while keeping model versions, datasets, and experiments reproducible\nDetecting model or feature drift before it has a significant impact on users\nDesigning A/B tests with appropriate metrics, sample sizes, and evaluation periods\nBalancing model complexity and prediction quality against latency and infrastructure costs\nHandling cold-start problems for new users, products, or categories\nRolling out new models safely, with clear monitoring and rollback mechanisms\nWhat we're looking for\n3+ years of experience deploying and operating machine learning models in production\nStrong Python skills and good software engineering practices\nPractical experience with PyTorch, TensorFlow, or an equivalent ML framework\nExperience building training, evaluation, and inference pipelines\nKnowledge of recommendation, ranking, personalisation, or similar machine learning systems\nExperience with model deployment, monitoring, versioning, and automated retraining\nUnderstanding of feature engineering and the differences between offline and online feature processing\nExperience designing or analysing controlled experiments and A/B tests\nAbility to investigate performance issues across models, data pipelines, and production infrastructure\nExperience using Git, code reviews, automated testing, and CI/CD\nConfidence working with data engineering, platform, and product teams\nYou do not need to have worked with every tool in the stack, but you should have experience taking models beyond experimentation and operating them as production systems.\nThe company\nA fast-growing digital marketplace with millions of monthly active users, several hundred employees, and a strong presence across Europe.\nMachine learning is used across key product areas, including recommendation, ranking, and personalisation. The team is developing the infrastructure and engineering practices required to operate these models reliably at scale.\nHealth insurance, meal vouchers, and an equity plan.\nLanguages: Native or bilingual French and professional English.\nA search run by The French Sourcer, recruitment built for technical teams.","description_format":"text","description_chars":3640,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"French","level":"Proficiency (C2)","optional":false},{"language":"English","level":"All levels","optional":false}]},"benefits":["Equity","Health insurance","Hybrid work"],"hiring_locations":[{"name":"France","iso":"FR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-20T08:38:43Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":3,"expected_fill_days":30,"reasons":["conf:0","velocity","win:early"],"computed_at":"2026-10-24T06:02:35Z"},"pay":null,"html_url":"https://alion.io/job/thefrenchsourcer-machine-learning-engineer","json_url":"https://alion.io/job/thefrenchsourcer-machine-learning-engineer.json","meta":{"generated_at":"2026-10-25T04:44:02Z","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":6290,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"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":4451662},"rest":"https://alion.io/mcp/rest/get_company?id=4451662"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fthefrenchsourcer-machine-learning-engineer"},{"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%2Fthefrenchsourcer-machine-learning-engineer"},{"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%2Fthefrenchsourcer-machine-learning-engineer"},{"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/thefrenchsourcer-machine-learning-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fthefrenchsourcer-machine-learning-engineer"}]}