{"id":3714579,"url":"https://alion.io/job/stitch-fix-remote-principal-full-stack-data-scientist-foundational-models","title":"[Remote] Principal Full-Stack Data Scientist - Foundational Models","company":{"id":6883,"name":"Stitch Fix","domain":"stitchfix.com","url":"https://alion.io/company/stitch-fix","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Data Science","role_family":"Data Science","seniority":"lead","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":200000,"max":237000,"currency":"USD","period":"year","gross":null,"usd_annual":237000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"A/B Testing","optional":false},{"name":"Machine Learning","optional":false},{"name":"Multimodal AI","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"Recommender Systems","optional":false},{"name":"SQL","optional":false}],"status":"closed","first_seen_at":"2026-11-03T23:48:06Z","employer_posted_date":null,"last_verified_at":"2026-11-04T09:38:30Z","board_verified":false,"closed_at":"2026-11-04T09:38:30Z","days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Note: The job is a remote job and is open to candidates in USA. Stitch Fix is hiring a Principal Full-Stack Data Scientist for its Foundational Models team, which builds machine learning systems that power personalization and recommendations. The role spans the full machine learning lifecycle, from developing and evaluating models to deploying and operating production systems, while collaborating across technical and product teams.\n\nResponsibilities\nDesign, develop, evaluate, and productionize machine learning models that improve Stitch Fix's personalization and recommendation systems\nAdvance foundational modeling capabilities, including client and item representations, embeddings, retrieval, ranking, recommendation models, and assortment generation\nExplore and apply LLMs and machine learning techniques—including deep learning, representation learning, multimodal modeling, and generative approaches—where they can meaningfully improve our systems\nOwn work across the full ML lifecycle, from problem formulation and data exploration through modeling, experimentation, deployment, monitoring, and iteration\nDesign rigorous offline evaluations and online experiments to understand model performance, measure client and business impact, and communicate results to stakeholders and leadership\nWork with large-scale behavioral and product datasets using Python, SQL, and distributed data-processing tools\nBuild production-quality ML solutions with attention to scalability, reliability, latency, observability, and cost\nCollaborate with Product, Engineering, and other Data Science teams to understand downstream needs and translate them into reusable foundational ML capabilities\nContribute to the technical direction of the Foundational Models team through design discussions, code reviews, research, prototyping, and development of engineering and modeling best practices\nCommunicate complex technical concepts, modeling approaches, and tradeoffs, and recommendations clearly to both technical and non-technical partners\nMentor and collaborate with other Data Scientists and engineers, helping raise the technical bar across the team\n\nSkills\nBachelor's Degree in a quantitative field such as Computer Science, Statistics, Physics, Mathematics, or a related field required\n8+ years of experience in design and deployment of machine learning solutions, ideally in personalization, such as recommendation systems, representation learning, or search\nStrong ability to architect technical solutions and write production-grade code in Python\nAbility to independently drive ambiguous machine learning problems from initial exploration and prototyping through production deployment, monitoring, iteration, and measurable impact\nExperience working with large-scale datasets using SQL and distributed data-processing technologies such as Spark\nExperience with modern deep-learning frameworks such as PyTorch or TensorFlow\nStrong understanding of model evaluation and experimentation, including offline evaluation, A/B testing, and translating model improvements into measurable product or business outcomes\nAbility to reason about the tradeoffs involved in production ML systems, including model quality, latency, scalability, reliability, and computational cost\nStrong communication and collaboration skills, with the ability to influence technical decisions and communicate complex concepts effectively to both technical and non-technical stakeholders\nIntellectual curiosity and a demonstrated ability to learn and apply new machine learning techniques to practical problems\nMaster's Degree or PhD preferred\n\nBenefits\nEquity\nEligible for an annual bonus\nNew hire and ongoing grants of restricted stock units, depending on employee and company performance\nEligible for medical, dental, vision, and other benefits\nInclusive health and wellness benefits\n\nCompany Overview\nStitch Fix is a personal styling platform that delivers curated and personalized apparel and accessory items for women. It was founded in 2011, and is headquartered in San Francisco, California, USA, with a workforce of 1001-5000 employees. Its website is http://stitchfix.com.\n\nCompany H1B Sponsorship\nStitch Fix has a track record of offering H1B sponsorships, with 9 in 2026, 22 in 2025, 18 in 2024, 17 in 2023, 45 in 2022, 34 in 2021, 30 in 2020. Please note that this does not guarantee sponsorship for this specific role.","description_format":"text","description_chars":4398,"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":[]},"benefits":["Restricted stock units"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Retail & Shop Systems","Apparel & Fashion Brands"],"lifecycle":[{"event":"open","at":"2026-11-04T00:21:00Z"},{"event":"close","at":"2026-11-04T09:38:30Z"}],"visa":[{"country":"US","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"H-1B filings in 12 months: 13 · green card filings: 1","filings_12m":13,"filings_prev_12m":21,"green_card_filings_12m":1,"median_offered_wage_usd":206786,"route":null,"cap_exempt":false,"checked_at":"2026-11-08T10:45:15+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":8}],"liveness":null,"pay":{"stated_usd_annual":237000,"is_top_pay":true},"html_url":"https://alion.io/job/stitch-fix-remote-principal-full-stack-data-scientist-foundational-models","json_url":"https://alion.io/job/stitch-fix-remote-principal-full-stack-data-scientist-foundational-models.json","meta":{"generated_at":"2026-11-08T14:45:26Z","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":31206,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-09T00:00:00Z"}},"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":6883},"rest":"https://alion.io/mcp/rest/get_company?id=6883"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fstitch-fix-remote-principal-full-stack-data-scientist-foundational-models"},{"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%2Fstitch-fix-remote-principal-full-stack-data-scientist-foundational-models"},{"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%2Fstitch-fix-remote-principal-full-stack-data-scientist-foundational-models"},{"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/stitch-fix-remote-principal-full-stack-data-scientist-foundational-models\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fstitch-fix-remote-principal-full-stack-data-scientist-foundational-models"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3714579}},{"tool":"search_jobs","arguments":{"company":"stitchfix.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3714579},"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. 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