Senior Machine Learning Engineer

Nubank

. Build, train, and deploy models driving credit, fraud, risk, personalization, and AI-native experiences .

Posted 10/16/2026full-timeBogota • ColombiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in building, training, and deploying machine learning models with a strong foundation in statistics and modeling techniques. Proficient in translating business needs into effective modeling strategies while collaborating with technical and business stakeholders.

Highest-signal resume keywords

Machine Learning TheoryPython ProgrammingModel DeploymentSQL QueryingCloud Platforms

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

StatisticsMachine LearningModeling TechniquesRegressionTree-Based ModelsDeep LearningModel ValidationOverfitting UnderstandingEvaluation MetricsData Architecture Patterns

Soft Skills

Strong Communication SkillsCollaboration

Tools & Technologies

Scikit-LearnPyTorchTensorFlowXGBoostAWSGCPAzureMLflowFeastAirflow

Industry Keywords

Data LakeData WarehouseData MartData VisualizationLookerPower BITableauMLOpsFeature StoresMicroservices

Tech Stack

Tools & technologies

AirflowAWSAzureCloudDistributed SystemsGoogle Cloud PlatformMicroservicesPythonPyTorchScikit-LearnSQLTableauTensorflow

About the role

Key responsibilities & impact

Build, train, and deploy models driving credit, fraud, risk, personalization, and AI-native experiences
Frame ambiguous business problems as well-defined modeling problems
Directly contribute to Nu Colombia’s strategy and performance by building forecasting models and models assessing and deciding on marketing investments
Design, build, and validate machine learning models with statistical rigor and business relevance
Engineer and maintain features and datasets for training and inference
Deploy and maintain ML models in batch and real-time scenarios
Integrate models with other systems and monitor operational and business metrics
Lead modeling projects end-to-end from problem framing and stakeholder alignment through delivery, monitoring, and iteration
Translate business needs into modeling strategies aligned with Nubank’s architecture and long-term goals

Requirements

What you’ll need

Strong foundation in statistics, machine learning theory and modeling techniques (e.g. regression, tree-based models, deep learning)
Programming experience in Python and familiarity with ML libraries (e.g. scikit-learn, PyTorch, TensorFlow, XGBoost)
Experience training, validating, and tuning models, with solid understanding of overfitting, bias-variance tradeoff and evaluation metrics
Understanding of the ML model lifecycle, from training and evaluation to deployment and monitoring
Ability to write efficient SQL queries and work with analytical data environments
Strong communication skills to collaborate with both technical and business stakeholders
Passion for building high-quality, production-grade models
Experience with cloud platforms such as AWS, GCP or Azure
Familiarity with distributed systems, microservices and asynchronous architectures
Experience with feature stores, MLOps tooling and experiment tracking (e.g. MLflow, Feast, Airflow)
Knowledge of data architecture patterns (Data Lake, Data Warehouse, Data Mart)
Experience with data visualization tools (Looker, Power BI, Tableau or similar)
Knowledge of software engineering best practices: testing, clean code, documentation
Availability to work 2 to 3 days per week onsite at the Bogotá office
Legal authorization to work in the country where the position is located

Benefits

Comp & perks

Chance of earning equity at Nu
Extended maternity and paternity leaves
Health and life insurance
NuCare - Our mental health and wellness assistance program
Nucleo - Our learning platform of courses
NuLanguage - Our language learning program
Vacations of 15 workdays
Gym partnership
Work-from-home Allowance
Parental Consultancy
Relocation Assistance Package, if applicable