{"id":28619,"url":"https://alion.io/job/nubank-staff-machine-learning-engineer","title":"Staff Machine Learning Engineer","company":{"id":13935,"name":"Nubank","domain":"nubank.com.br","url":"https://alion.io/company/nu-bank","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":100,"open_postings":9,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":37,"computed_at":"2026-10-17T05:46:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"staff","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Palo Alto, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":230000,"max":345000,"currency":"USD","period":"year","gross":null,"usd_annual":345000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"A/B Testing","optional":false},{"name":"Interpretability","optional":false},{"name":"JAX","optional":false},{"name":"Machine Learning","optional":false},{"name":"Multimodal AI","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"TensorFlow","optional":false},{"name":"Transformers","optional":false}],"status":"live","first_seen_at":"2026-07-20T11:50:26Z","employer_posted_date":"2026-07-20","last_verified_at":"2026-10-17T21:30:45Z","board_verified":true,"closed_at":null,"days_open":89,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":89},"description":"About Nu\nNu serves more than 140 million customers, guided by a mission to fight complexity and empower people. The company has been leading an industry transformation through innovative products and human-centered services.\nProprietary technology and data at scale power Nu’s digital platform, built to promote financial access, advancement, and transparency. Its business model thrives on customer love and lower costs, feeding a flywheel of growth and profitability.\nVisit ourInstitutional Page\nAbout the role\nAt AI Core, we are scaling the impact of our AI initiatives to become the primary driver of Nubank’s most critical decision systems. We are seeking Machine Learning Engineers to lead high-impact research projects that bridge the gap between state-of-the-art AI and production-grade financial systems. You will be responsible for solving complex, ambiguous problems using Deep Learning and Foundation Models, ensuring our architectures are scalable, efficient, and driving measurable business results.\nAs an Machine Learning Engineer (MLE), you’re expected to:\nResearch Execution & Technical Leadership (Complexity & Autonomy)\n\nLead and execute complex applied research initiatives independently, focusing on building and optimizing architectures (e.g., Transformers, GNNs) that can be deployed across critical use cases like Credit, RecSys, GenAI, and real-time inference.\n\nAddress difficult and ambiguous modeling problems that require coordination across various stakeholders (Data, Infra, Product), delivering innovative solutions with a clear focus on medium-term impact.\n\nBridge the gap between research and production by designing architectures that respect MLOps constraints, ensuring models are optimized for latency, interpretability, and cost-efficiency.\n\nStrategic Impact & Collaboration (Impact)\n\nDevelop and deliver innovative solutions that address project-level challenges, focusing on pushing the latest platform and AI research improvements into downstream production models.\n\nActively participate in cross-functional collaborations, ensuring that research outputs are seamlessly integrated into Nubank's decision-making engines.\n\nEstablish technical standards within the AI Core team for experimentation, model evaluation, and code quality, inspiring peers to raise their performance.\n\nMentorship & Function Contribution (Function Contribution)\n\nServe as a technical mentor for senior engineers and researchers, providing guidance on deep learning fundamentals, problem formulation, and research methodology.\n\nActively contribute to the function's growth by participating in mandatory activities like hiring (interview panels) and leading internal task forces to improve our ML lifecycle.\n\nContribute to thought leadership by participating in research collaborations or internal papers that align with Nubank’s strategic goals.\n\nWhat are we looking for?\nProfessional Experience: 5-7+ years in applied AI/ML, with a proven track record of delivering research-driven systems into production environments\n\nTechnical Mastery:\nDeep expertise in Deep Learning architectures (Transformers, Multimodal, or GNNs).\n\nStrong coding skills in Python and proficiency with frameworks like PyTorch, JAX, or TensorFlow.\n\nSolid understanding of MLOps and the constraints of deploying models at scale.\n\nProblem Solving: Sophisticated skills in ML problem formulation and the ability to navigate uncertainty when data is messy or unavailable.\n\nCommunication: Ability to communicate complex technical concepts to both technical peers and cross-functional stakeholders, ensuring alignment and buy-in.\n\nAnalytical Capacity: Experience with large-scale experimentation and A/B testing to validate research hypotheses.\n\nOur Benefits\nOpportunity of earning equity at Nu\n\nTotal compensation includes base salary, RSUs and benefits. Base salary range: $230k - $345k\n\nMedical Insurance\n\nDental and Vision Insurance\n\nLife Insurance and AD&D\n\nExtended maternity and paternity leaves\n\nNucleo - Our learning platform of courses\n\nNuLanguage - Our language learning program\n\nNuCare - Our mental health and wellness assistance program\n\nExtended maternity and paternity leaves\n\n401K\n\nSaving Plans - Health Saving Account and Flexible Spending Account\n\nWork-from-home Allowance\n\nRelocation Assistance Package, if applicable.\n\nRole Location\nPalo Alto, California\n Hybrid 2-3 times/week: Our hybrid work model brings us to the office at least twice a week, on strategic days designed to maximize team connection and collaboration. For more details, visit https://building.nubank.com/nu-hybrid-work-model/\nOur recruitment process may involve the use of artificial intelligence-enabled tools, such as automated interview transcription and analysis, to support the evaluation process. Artificial intelligence is not used to make final hiring decisions; all decisions are made by human reviewers.\nTo maintain a consistent and fair process for every candidate, Nu does not provide individualized technical feedback. See how our policy works here","description_format":"text","description_chars":5031,"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":["401k plan","Equity","Health insurance","Hybrid work","Life insurance","Relocation assistance","Vision insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Cards & Card Issuing","Digital Banks & Neobanks"],"lifecycle":[{"event":"open","at":"2026-07-20T11:50:26Z"}],"visa":[],"liveness":{"score":21,"band":"cold","label":"Long shot","p_open":1,"p_active":0.611,"p_room":0.35,"age_days":88,"expected_fill_days":37,"reasons":["conf:0","velocity","win:tail"],"computed_at":"2026-10-17T05:46:00Z"},"pay":{"stated_usd_annual":345000,"is_top_pay":true},"html_url":"https://alion.io/job/nubank-staff-machine-learning-engineer","json_url":"https://alion.io/job/nubank-staff-machine-learning-engineer.json","meta":{"generated_at":"2026-10-17T23:17:48Z","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":1572,"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":13935},"rest":"https://alion.io/mcp/rest/get_company?id=13935"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fnubank-staff-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%2Fnubank-staff-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%2Fnubank-staff-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/nubank-staff-machine-learning-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fnubank-staff-machine-learning-engineer"}]}