{"id":3749482,"url":"https://alion.io/job/mistral-ai-applied-scientist-research-engineer-optimisation-emea","title":"Applied Scientist - Optimisation, EMEA","company":{"id":22,"name":"Mistral AI","domain":"mistral.ai","url":"https://alion.io/company/mistral-ai","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":95,"open_postings":187,"ghost_share":0,"stale_share":0.011,"repost_share":0,"time_to_fill_p50_days":66,"computed_at":"2026-11-08T05:47:12Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Paris, France","Amsterdam, Netherlands","London, United Kingdom","Lausanne, Switzerland"],"countries":["FR","NL","GB","CH"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":true,"has_equity":false,"technologies":[{"name":"Fine-tuning","optional":false},{"name":"JAX","optional":false},{"name":"Mistral","optional":false},{"name":"Mistral SDK","optional":false},{"name":"Post-training","optional":false},{"name":"Pre-training","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"Reinforcement Learning","optional":false},{"name":"LLM","optional":true},{"name":"Machine Learning","optional":true}],"status":"live","first_seen_at":"2026-11-04T11:01:26Z","employer_posted_date":"2026-11-04","last_verified_at":"2026-11-09T01:00:53Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"About Mistral\nMistral provides full-stack AI solutions: from frontier models to developer tools, applications, and compute. We partner with enterprises tackling the hardest problems across high-stakes industries like finance, manufacturing, defense, healthcare, and the public sector, co-creating customized AI systems that they can run on their terms.\nWe are a dynamic, collaborative team passionate about AI and its potential to transform society. Our diverse workforce thrives in competitive environments and is committed to driving innovation. Our teams are distributed between Europe, North America, Asia and the Middle East. We are creative, low-ego and team-spirited.\nThe Role\nMistral AI is seeking Applied Scientists and Research Engineers focused on optimisation and operational research. You will post-train SOTA large language models to formulate and solve optimisation problems, and apply them to diverse use cases.\nWorking cross-functionally with both external and internal science, engineering, and product teams you will deliver high-impact AI solutions. We are made of researchers, engineers, product builders, ex-founders who love tackling the most complex real world problems in the industry.\nWhat you will do\nRun pre-training, post-training and deploy state of the art models on clusters with thousands of GPUs.\n\nGenerate and curate datasets for optimisation modelling (LP, MILP, constraint programming, scheduling, routing), and build evaluators and benchmarks for operational research tasks.\n\nUse solvers as verifiers to build reward signals for reinforcement learning.\n\nDevelop the necessary tools and frameworks to facilitate data generation, model training, evaluation and deployment.\n\nCollaborate with cross-functional teams to tackle complex use cases.\n\nManage research projects and communications with client research teams.\n\nAbout you\nFluent in English with excellent communication skills - at ease explaining complex technical concepts to both technical and non-technical audiences.\n\nExpert with PyTorch or JAX.\n\nExperience training or fine-tuning large language models for reasoning, code, or mathematics.\n\nStrong background in operational research or mathematical optimisation, with hands-on experience using solvers (e.g. Gurobi, CPLEX, OR-Tools) and modelling languages (e.g. Pyomo, AMPL).\n\nNot afraid of contributing to a big codebase; finds their way around independently with little guidance.\n\nWrites clean, readable, high-performance, fault-tolerant Python code.\n\nDoesn’t need roadmaps: moves independently and navigates uncertainty with confidence.\n\nLow-ego, collaborative and eager to learn.\n\nTrack record of success through personal projects, professional projects or academia.\n\nNice to have\nEx-founder or builder\n\nPhD / Master in a relevant field (Operational Research, Applied Mathematics, Machine Learning) - exceptional candidates from other backgrounds welcome.\n\nExperience with reinforcement learning using verifiable rewards.\n\nExperience with LLM-based optimisation modelling (e.g. NL4Opt-style problem formulation).\n\nIndustry experience in supply chain, logistics, energy, or scheduling.\n\nExperience working on large code bases or large machine learning models at scale.\n\nContributions to a large open-source or industry codebase.\n\nPublications in top academic journals or conferences.\n\nEnjoys improving existing code: typing, tests, CI pipelines.\n\nWhat We Offer\nWe offer a comprehensive benefits package designed to support your well-being, growth, and work-life balance. Benefits vary by country and may include healthcare coverage, parental leave, retirement plans, relocation support, wellness programs, meal and transportation allowances, and other location-specific perks.\nFor the most up-to-date details on benefits available in your location, please refer to our Benefits page.\nPrivacy Policy\nYour privacy matters to us. You can learn more about how we handle your personal data in our Applicant Privacy Policy.","description_format":"text","description_chars":3967,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Parental leave","Retirement plans","Wellness"],"hiring_locations":[{"name":"Germany","iso":"DE","kind":"region"},{"name":"France","iso":"FR","kind":"region"},{"name":"United Arab Emirates","iso":"AE","kind":"region"},{"name":"United Kingdom","iso":"GB","kind":"region"},{"name":"Austria","iso":"AT","kind":"region"},{"name":"Belgium","iso":"BE","kind":"region"},{"name":"Bosnia and Herzegovina","iso":"BA","kind":"region"},{"name":"Bulgaria","iso":"BG","kind":"region"},{"name":"Croatia","iso":"HR","kind":"region"},{"name":"Cyprus","iso":"CY","kind":"region"},{"name":"Czech Republic","iso":"CZ","kind":"region"},{"name":"Denmark","iso":"DK","kind":"region"},{"name":"Finland","iso":"FI","kind":"region"},{"name":"Hungary","iso":"HU","kind":"region"},{"name":"Ireland","iso":"IE","kind":"region"},{"name":"Israel","iso":"IL","kind":"region"},{"name":"Italy","iso":"IT","kind":"region"},{"name":"Kenya","iso":"KE","kind":"region"},{"name":"Montenegro","iso":"ME","kind":"region"},{"name":"Netherlands","iso":"NL","kind":"region"},{"name":"Nigeria","iso":"NG","kind":"region"},{"name":"Norway","iso":"NO","kind":"region"},{"name":"Poland","iso":"PL","kind":"region"},{"name":"Romania","iso":"RO","kind":"region"},{"name":"Saudi Arabia","iso":"SA","kind":"region"},{"name":"Serbia","iso":"RS","kind":"region"},{"name":"South Africa","iso":"ZA","kind":"region"},{"name":"Spain","iso":"ES","kind":"region"},{"name":"Sweden","iso":"SE","kind":"region"},{"name":"Switzerland","iso":"CH","kind":"region"},{"name":"Turkey","iso":"TR","kind":"region"},{"name":"Ukraine","iso":"UA","kind":"region"},{"name":"Albania","iso":"AL","kind":"region"},{"name":"Algeria","iso":"DZ","kind":"region"},{"name":"Andorra","iso":"AD","kind":"region"},{"name":"Angola","iso":"AO","kind":"region"},{"name":"Bahrain","iso":"BH","kind":"region"},{"name":"Benin","iso":"BJ","kind":"region"},{"name":"Botswana","iso":"BW","kind":"region"},{"name":"Burkina Faso","iso":"BF","kind":"region"},{"name":"Burundi","iso":"BI","kind":"region"},{"name":"Cameroon","iso":"CM","kind":"region"},{"name":"Cape Verde","iso":"CV","kind":"region"},{"name":"Chad","iso":"TD","kind":"region"},{"name":"Central African Republic","iso":"CF","kind":"region"},{"name":"Comoros","iso":"KM","kind":"region"},{"name":"Democratic Republic of the Congo","iso":"CD","kind":"region"},{"name":"Djibouti","iso":"DJ","kind":"region"},{"name":"Equatorial Guinea","iso":"GQ","kind":"region"},{"name":"Eritrea","iso":"ER","kind":"region"},{"name":"Estonia","iso":"EE","kind":"region"},{"name":"Eswatini","iso":"SZ","kind":"region"},{"name":"Ethiopia","iso":"ET","kind":"region"},{"name":"Faroe Islands","iso":"FO","kind":"region"},{"name":"Gabon","iso":"GA","kind":"region"},{"name":"Gambia","iso":"GM","kind":"region"},{"name":"Georgia","iso":"GE","kind":"region"},{"name":"Ghana","iso":"GH","kind":"region"},{"name":"Greece","iso":"GR","kind":"region"},{"name":"Guinea","iso":"GN","kind":"region"},{"name":"Guinea-Bissau","iso":"GW","kind":"region"},{"name":"Iceland","iso":"IS","kind":"region"},{"name":"Iraq","iso":"IQ","kind":"region"},{"name":"Isle of Man","iso":"IM","kind":"region"},{"name":"Ivory Coast","iso":"CI","kind":"region"},{"name":"Jordan","iso":"JO","kind":"region"},{"name":"Kosovo","iso":"XK","kind":"region"},{"name":"Kuwait","iso":"KW","kind":"region"},{"name":"Latvia","iso":"LV","kind":"region"},{"name":"Lebanon","iso":"LB","kind":"region"},{"name":"Lesotho","iso":"LS","kind":"region"},{"name":"Liberia","iso":"LR","kind":"region"},{"name":"Liechtenstein","iso":"LI","kind":"region"},{"name":"Lithuania","iso":"LT","kind":"region"},{"name":"Luxembourg","iso":"LU","kind":"region"},{"name":"Madagascar","iso":"MG","kind":"region"},{"name":"Malawi","iso":"MW","kind":"region"},{"name":"Mali","iso":"ML","kind":"region"},{"name":"Malta","iso":"MT","kind":"region"},{"name":"Mauritania","iso":"MR","kind":"region"},{"name":"Mauritius","iso":"MU","kind":"region"},{"name":"Mayotte","iso":"YT","kind":"region"},{"name":"Moldova","iso":"MD","kind":"region"},{"name":"Monaco","iso":"MC","kind":"region"},{"name":"Morocco","iso":"MA","kind":"region"},{"name":"Mozambique","iso":"MZ","kind":"region"},{"name":"Namibia","iso":"NA","kind":"region"},{"name":"Niger","iso":"NE","kind":"region"},{"name":"North Macedonia","iso":"MK","kind":"region"},{"name":"Oman","iso":"OM","kind":"region"},{"name":"Palestine","iso":"PS","kind":"region"},{"name":"Portugal","iso":"PT","kind":"region"},{"name":"Qatar","iso":"QA","kind":"region"},{"name":"Republic of the Congo","iso":"CG","kind":"region"},{"name":"Réunion","iso":"RE","kind":"region"},{"name":"Rwanda","iso":"RW","kind":"region"},{"name":"Saint Helena and Ascension","iso":"SH","kind":"region"},{"name":"San Marino","iso":"SM","kind":"region"},{"name":"São Tomé and Príncipe","iso":"ST","kind":"region"},{"name":"Senegal","iso":"SN","kind":"region"},{"name":"Seychelles","iso":"SC","kind":"region"},{"name":"Sierra Leone","iso":"SL","kind":"region"},{"name":"Slovakia","iso":"SK","kind":"region"},{"name":"Slovenia","iso":"SI","kind":"region"},{"name":"Somalia","iso":"SO","kind":"region"},{"name":"South Sudan","iso":"SS","kind":"region"},{"name":"Svalbard","iso":"SJ","kind":"region"},{"name":"Tanzania","iso":"TZ","kind":"region"},{"name":"Togo","iso":"TG","kind":"region"},{"name":"Tunisia","iso":"TN","kind":"region"},{"name":"Uganda","iso":"UG","kind":"region"},{"name":"Western Sahara","iso":"EH","kind":"region"},{"name":"Zambia","iso":"ZM","kind":"region"},{"name":"Zimbabwe","iso":"ZW","kind":"region"},{"name":"Gibraltar","iso":"GI","kind":"region"},{"name":"Vatican","iso":"VA","kind":"region"}],"hiring_excludes":[],"relocation_offered":true,"industries":["LLM & Generative AI","Code Intelligence","Foundation Models","AI Research Labs"],"lifecycle":[{"event":"open","at":"2026-11-04T14:38:36Z"}],"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":66,"reasons":["conf:1","velocity","win:early","comp:brand"],"computed_at":"2026-11-08T05:47:12Z"},"pay":null,"html_url":"https://alion.io/job/mistral-ai-applied-scientist-research-engineer-optimisation-emea","json_url":"https://alion.io/job/mistral-ai-applied-scientist-research-engineer-optimisation-emea.json","meta":{"generated_at":"2026-11-09T03:49:23Z","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":2378,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-10T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":22},"rest":"https://alion.io/mcp/rest/get_company?id=22"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmistral-ai-applied-scientist-research-engineer-optimisation-emea"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fmistral-ai-applied-scientist-research-engineer-optimisation-emea"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fmistral-ai-applied-scientist-research-engineer-optimisation-emea"},{"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/mistral-ai-applied-scientist-research-engineer-optimisation-emea\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmistral-ai-applied-scientist-research-engineer-optimisation-emea"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3749482}},{"tool":"search_jobs","arguments":{"company":"mistral.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3749482},"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); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}