{"id":2742677,"url":"https://alion.io/job/nubank-senior-machine-learning-engineer","title":"Senior 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":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bogotá, Colombia"],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":87000,"max_usd":223000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":2102},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"ETL/ELT","optional":false},{"name":"Feature Store","optional":false},{"name":"Kubernetes","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"PyTorch","optional":false},{"name":"Scikit-learn","optional":false},{"name":"SQL","optional":false},{"name":"TensorFlow","optional":false},{"name":"XGBoost","optional":false},{"name":"Azure","optional":true},{"name":"Feast","optional":true},{"name":"GCP","optional":true},{"name":"Looker","optional":true},{"name":"MLFlow","optional":true},{"name":"Power BI","optional":true},{"name":"Tableau","optional":true}],"status":"live","first_seen_at":"2026-10-16T19:44:00Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-18T03:58:39Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"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\nMachine Learning Engineer at Nubank\nAt Nubank, Machine Learning Engineers sit at the core of how we make decisions at scale. We build, train, and deploy models that drive credit, fraud, risk, personalization decisions and a growing set of AI-native experiences for millions of customers every day. We do it with engineering rigor, statistical depth, and a deep focus on impact.\nOur MLEs work across the full modeling lifecycle: framing business problems as ML problems, engineering features, training and validating models, and deploying and monitoring them in production. We value small, independent teams that move fast, own their decisions end-to-end, and hold themselves to a high bar for quality and craft.\nIncreasingly, that work also includes Generative AI and Agentic Engineering. Depending on the problem, our engineers design and build systems that combine models, tools, workflows, evaluation loops, and human oversight to solve real business tasks reliably in production.\nWe strive for state-of-the-art ML practices that currently include a variety of technologies. While we value candidates that are familiar with them, we are also confident that engineers who are interested in joining Nubank will be able to learn from our team.\nLarge-scale model training and experimentation pipelines\n\nFeature engineering and feature stores feeding both batch and real-time models\n\nModel deployment and serving in production, with monitoring through operational and business metrics\n\nDistributed data processing for training datasets at scale\n\nContinuous Integration and Deployment into AWS and Kubernetes\n\nExperiment tracking, model versioning, and reproducibility tooling\n\nA robust data platform built on modern ETL/ELT practices\n\nAs a Machine Learning Engineer, you’re expected to:\nDirectly contribute to Nu Colombia’s strategy and performance mainly by building forecasting models and models to assess and decide on marketing investments\n\nFrame ambiguous business problems as well-defined modeling problems\n\nDesign, build and validate machine learning models, ensuring statistical rigor and business relevance\n\nEngineer and maintain features and datasets used for training and inference\n\nDeploy and maintain ML models in both batch and real-time scenarios, integrating them with other systems and monitoring through operational and business metrics\n\nLead modeling projects end-to-end - from problem framing and stakeholder alignment to delivery, monitoring and iteration\n\nTranslate business needs into modeling strategies aligned with Nubank's architecture and long-term goals\n\nWhat We're Looking For\nStrong foundation in statistics, machine learning theory and modeling techniques (e.g. regression, tree-based models, deep learning)\n\nProgramming experience in Python and familiarity with ML libraries (e.g. scikit-learn, PyTorch, TensorFlow, XGBoost)\n\nExperience training, validating, and tuning models, with solid understanding of overfitting, bias-variance tradeoff and evaluation metrics\n\nUnderstanding of the ML model lifecycle, from training and evaluation to deployment and monitoring\n\nAbility to write efficient SQL queries and work with analytical data environments\n\nStrong communication skills to collaborate with both technical and business stakeholders\n\nPassion for building high-quality, production-grade models\n\nNice to Have\nExperience with cloud platforms such as AWS, GCP or Azure\n\nFamiliarity with distributed systems, microservices and asynchronous architectures\n\nExperience with feature stores, MLOps tooling and experiment tracking (e.g. MLflow, Feast, Airflow)\n\nKnowledge of data architecture patterns (Data Lake, Data Warehouse, Data Mart)\n\nExperience with data visualization tools (Looker, Power BI, Tableau or similar)\n\nKnowledge of software engineering best practices: testing, clean code, documentation\n\nCore Benefits\nChance of earning equity at Nu\n\nExtended maternity and paternity leaves\n\nHealth and life insurance\n\nNuCare - Our mental health and wellness assistance program\n\nNucleo - Our learning platform of courses\n\nNuLanguage - Our language learning program\n\nVacations of 15 workdays\n\nGym partnership\n\nWork-from-home Allowance\n\nParental Consultancy\n\nRelocation Assistance Package, if applicable\n\nWork Model\nHybrid 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.\nFor more details, visit https://building.nubank.com/nu-hybrid-work-model/\nRole Location\nBogota, Colombia.\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":5448,"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":["Equity","Hybrid work","Life insurance","Relocation assistance"],"hiring_locations":[{"name":"Colombia","iso":null,"kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Cards & Card Issuing","Digital Banks & Neobanks"],"lifecycle":[{"event":"open","at":"2026-10-16T21:22:03Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":37,"reasons":["conf:0","velocity","win:early"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/nubank-senior-machine-learning-engineer","json_url":"https://alion.io/job/nubank-senior-machine-learning-engineer.json","meta":{"generated_at":"2026-10-18T05:39:48Z","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":8576,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"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-senior-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-senior-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-senior-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-senior-machine-learning-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fnubank-senior-machine-learning-engineer"}]}