About Us
Nu is one of the largest digital financial platforms in the world, with more than 122 million customers across Brazil, Mexico, and Colombia. Guided by our mission to fight complexity and empower people, we are redefining financial services in Latin America and this is still just the beginning of the purple future we’re building. Listed on the New York Stock Exchange (NYSE: NU), we combine proprietary technology, data intelligence, and an efficient operating model to deliver financial products that are simple, accessible, and human. Our impact has been recognized by global rankings such as Time 100 Companies, Fast Company’s Most Innovative Companies, and Forbes World’s Best Bank. Visit our institutional page https://international.nubank.com.br/careers/.
About The Team
At Nubank we heavily rely on data, machine learning and other quantitative models & techniques to drive our strategy and provide the best experience and products to our customers. The position holder will be part of the Model Risk team, within the Risk Management structure at Nubank. The Model Risk team is the second line of defense for our models. Our mission is to ensure Nubank relies on world‑class solutions that will lead to optimal and sustainable decisions. We act by providing independent review & challenge to models, staying tuned to cutting‑edge techniques, along with business, customers and regulatory needs. We also work to identify and control risks related to our models, as well as in the definition and implementation of feedback loops to constantly improve them.
About The Role
This is a senior individual‑contributor position, in which you will:
Conduct independent reviews of quantitative models based on various financial, statistical and machine learning techniques, identifying and validating model's uses, hypothesis, data, methodologies and compliance with regulatory requirements.
Provide effective challenges, identify risks and enhancement opportunities, and engage with other analysts to strengthen our decision‑making tools.
Develop playbooks and toolkits (Python, Scala, LLM, etc.) to optimise model reviews, ongoing models monitoring, and assess the impact of models in decisions.
Contribute to the consolidation of Nubank's Model Risk Management and Model Review frameworks with autonomy and creativity.
Discuss and report model risk status and independent opinions on models with different stakeholders, including senior managers and regulators.
Be exposed to different types of decisions and processes (e.g. credit, fraud, operations and in different countries).
Ensure the team maintains a high level of technical excellence.
Work in a multicultural, diverse and highly skilled environment.
Basic Qualifications
Experience developing or validating quantitative and/or machine learning models used to leverage important decision‑making processes or to solve relevant academic problems.
Interest in reviewing complex machine learning and other types of models to identify risks and propose enhancements.
Data science skills, strong knowledge on machine learning tools and techniques.
Strong programming skills.
Proactive, autonomous and ability to learn fast, with strong analytical and problem‑solving skills, motivated by challenges.
Organised and detail‑oriented, without losing track of the big picture.
Good communication and interpersonal skills, with the ability to influence and effectively discuss complex topics with both technical and non‑technical stakeholders.
English language proficiency.
Preferred Qualifications
Academic or professional experience in statistical and mathematical model application and/or validation.
Experience in credit risk management and/or other risk management frameworks.
Strong knowledge on risk management regulation (Model Risk Management, PRA SS1/23, FED SR 11-7).
Master degree or relevant undergraduate scientific project.
Financial or risk certificate (FRM or CFA).
Previous experience with programming languages and tools (Python, SQL, Scala, Databricks, GitHub, Cursor).
Benefits
Chance of earning equity at Nubank
Food/Meal Card (Vale‑Refeição and/or Vale Alimentação)
Public Transportation Commuting Benefit (Vale‑Transporte)
NuCare – Psychological, Financial and Legal Assistance Program
Life Insurance
Medical Plan
Dental Plan
NuLanguage – Language Course Program
Nucleo – Our learning platform of courses
Extended Parental Leave
Daycare Allowance
Parental Consultancy
Work‑from‑home Allowance
Gym Partnerships
30 days of paid vacation
Relocation Assistance Package, if applicable
Work Model for this Role
Hybrid 2‑3 times/week: Our hybrid work model brings us to the office at least twice a week, on strategic days designed to maximise team connection and collaboration. For more details, visit https://building.nubank.com/nu‑hybrid‑work‑model/.
Seniority level
Mid‑Senior level
Employment type
Full‑time
Job function
General Business, Management, and Business Development
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