ML Engineer Jobs in Rio de Janeiro.
All active ML Engineer roles based in Rio de Janeiro.
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Lead/Staff Machine Learning Engineer
About us
Nu was born in 2013 with the mission to fight complexity to empower people in their daily lives by reinventing financial services. We are one of the world’s largest digital banking platforms, serving millions of customers across Brazil, Mexico, and Colombia. For more information, visit our institutional page https://international.nubank.com.br/careers/
ML Engineering at Nubank
Data Science is essential to every part of the business at Nubank, since Day 1. Most areas of the company use data science to some extent. ML Engineers are key to connecting ML models and ML-enabled systems to the rest of our infrastructure, while making sure that they work properly, delivering value to our customers.
As a Machine Learning Engineer, you’re expected to
- Interact with other team members to understand how to best apply data science and artificial intelligence to Nubank’s problems;
- Help monitor and maintain models and ML systems, making sure they are working well as measured by performance, operational and business metrics;
- Help deploy ML models both in batch and real-time scenarios. This may include building pipelines, constructing features and integrating models to other systems;
- Help build and maintain tooling and platforms to scale operations across multiple teams;
- Be familiar with modeling and statistics concepts;
Our ideal candidate
- Has extensive programming experience and is familiar with modern development techniques;
- Has experience creating, deploying and maintaining ML models and ML-enabled systems using modern frameworks;
- Understands the most common failure modes in ML-enabled systems and knows how to avoid and/or mitigate those;
- Is familiar with all stages of the ML model lifecycle, from inception to deployment and steady-state operation;
- Is familiar with cloud-based services from vendors such as AWS, GCP and Azure.
- Is familiar with software engineering and architecture principles and how they enable sustainable and maintainable systems;
- Is familiar with data engineering routines, pipelines and job scheduling frameworks;
- Is able to navigate complex mathematical and analytical environments when needed;
Our 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
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 maximize team connection and collaboration. For more details, visit https://building.nubank.com/nu-hybrid-work-model/
Ready to apply?
Apply to Nubank
Senior Security Engineer (GRC)
About us
Nubank was founded in 2013 with the mission of fighting complexity to empower people in their daily lives by reinventing financial services. Today, we are one of the largest digital banking platforms in the world, serving millions of customers across Brazil, Mexico, and Colombia. For more information, visit our careers page: https://international.nubank.com.br/careers/
About the team
The Governance, Risk and Compliance (GRC) team enables Nubank to remain compliant with legal, regulatory, and internal requirements, while continuously identifying, classifying, and monitoring risks and providing strategic insights and performance evaluation to leadership.
The GRC squad collaborates with multidisciplinary teams to align our technology security strategy with Nubank’s overall business objectives, ensuring that identified risks are mitigated and that risk-based decision-making is enabled within and beyond the IT & Security Business Unit.
About the role
You will be responsible for acting as a technical reference in security, certifications, and internal controls, serving as a bridge between engineering, risk, audit, and business stakeholders.
You will define strategies, support risk-based decision-making, and ensure that security and compliance requirements are effectively embedded into processes, systems, and products.
Key responsibilities
- Act as a senior technical and governance reference across security, certifications, risk, and internal controls, influencing strategy.
- Identify control gaps and improvement opportunities in technical procedures required for certification and recertification processes (e.g., ISO 27001, PCI-DSS).
- Develop and maintain strong partnerships with business and technical leaders to orchestrate audits, assessments, and remediation plans in a risk-based and scalable way.
- Collaborate with technical teams to define action plans that ensure adherence to regulatory requirements and internal policies.
- Conduct assessments of internal controls, ensuring adherence to internal policies, legal requirements, and industry standards.
- Identify gaps and improvement opportunities in the internal controls landscape and lead control reviews, ensuring timely resolution of issues.
- Work closely with Risk teams to align on the mitigation of identified risks.
- Support responses to audit requests, regulatory inquiries, and due diligence from business partners.
- Partner with Engineering, Product, IT, and global teams to integrate compliance and security requirements into processes and systems.
- Define and monitor KRIs and KPIs, delivering forward-looking, data-driven insights to senior management and Committees.
- Drive continuous improvement and scale, simplifying processes and strengthening Nubank’s Security Maturity as the company grows globally.
Qualification Requirements
- Solid experience in information security, with strong knowledge of frameworks such as PCI-DSS, ISO 27000 family, NIST, and similar.
- Prior experience with security certification processes and/or internal controls, compliance, and audit support.
- Excellent executive communication skills, capable of translating complex topics into clear, actionable insights for senior leadership and committees.
- Experience operating in regulated and global environments, including interaction with auditors and regulators.
- Bachelor’s degree in Engineering, Technology, Security Information, Risk Management or related fields.
- Familiarity with using AI and automation (e.g., machine learning, generative AI, or LLM-based tooling) to enhance security compliance use cases.
- Knowledge of the regulatory landscape relevant to financial services, such as SOx, BACEN, CVM, CNBV, ANBIMA, SEC, and related regulations.
- Hands-on experience with cloud environments (e.g., AWS, GCP) and implementing security controls in these contexts.
- Advanced English (written and verbal) required.
Nice to have Requirements
- Relevant certifications such as CRISC, CISA, Security+, CISSP, or CISM are considered a strong plus.
International experience is highly desirable.
Our 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 maximize team connection and collaboration. For more details, visit https://building.nubank.com/nu-hybrid-work-model/
Ready to apply?
Apply to Nubank
Lead Security Engineer (GRC)
About us
Nubank was founded in 2013 with the mission of fighting complexity to empower people in their daily lives by reinventing financial services. Today, we are one of the largest digital banking platforms in the world, serving millions of customers across Brazil, Mexico, and Colombia. For more information, visit our careers page: https://international.nubank.com.br/careers/
About the team
The Governance, Risk and Compliance (GRC) team enables Nubank to remain compliant with legal, regulatory, and internal requirements, while continuously identifying, classifying, and monitoring risks and providing strategic insights and performance evaluation to leadership.
The GRC squad collaborates with multidisciplinary teams to align our technology security strategy with Nubank’s overall business objectives, ensuring that identified risks are mitigated and that risk-based decision-making is enabled within and beyond the IT & Security Business Unit.
About the role
You will be responsible for acting as a technical reference in security, certifications, and internal controls, serving as a bridge between engineering, risk, audit, and business stakeholders.
You will define strategies, support risk-based decision-making, and ensure that security and compliance requirements are effectively embedded into processes, systems, and products.
Key responsibilities
- Act as a senior technical and governance reference across security, certifications, risk, and internal controls, influencing strategy.
- Identify control gaps and improvement opportunities in technical procedures required for certification and recertification processes (e.g., ISO 27001, PCI-DSS).
- Develop and maintain strong partnerships with business and technical leaders to orchestrate audits, assessments, and remediation plans in a risk-based and scalable way.
- Collaborate with technical teams to define action plans that ensure adherence to regulatory requirements and internal policies.
- Conduct assessments of internal controls, ensuring adherence to internal policies, legal requirements, and industry standards.
- Identify gaps and improvement opportunities in the internal controls landscape and lead control reviews, ensuring timely resolution of issues.
- Work closely with Risk teams to align on the mitigation of identified risks.
- Support responses to audit requests, regulatory inquiries, and due diligence from business partners.
- Partner with Engineering, Product, IT, and global teams to integrate compliance and security requirements into processes and systems.
- Define and monitor KRIs and KPIs, delivering forward-looking, data-driven insights to senior management and Committees.
- Drive continuous improvement and scale, simplifying processes and strengthening Nubank’s Security Maturity as the company grows globally.
Qualification Requirements
- Solid experience in information security, with strong knowledge of frameworks such as PCI-DSS, ISO 27000 family, NIST, and similar.
- Prior experience with security certification processes and/or internal controls, compliance, and audit support.
- Excellent executive communication skills, capable of translating complex topics into clear, actionable insights for senior leadership and committees.
- Experience operating in regulated and global environments, including interaction with auditors and regulators.
- Bachelor’s degree in Engineering, Technology, Security Information, Risk Management or related fields.
- Familiarity with using AI and automation (e.g., machine learning, generative AI, or LLM-based tooling) to enhance security compliance use cases.
- Knowledge of the regulatory landscape relevant to financial services, such as SOx, BACEN, CVM, CNBV, ANBIMA, SEC, and related regulations.
- Hands-on experience with cloud environments (e.g., AWS, GCP) and implementing security controls in these contexts.
- Advanced English (written and verbal) required.
Nice to have Requirements
- Relevant certifications such as CRISC, CISA, Security+, CISSP, or CISM are considered a strong plus.
International experience is highly desirable.
Our 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 maximize team connection and collaboration. For more details, visit https://building.nubank.com/nu-hybrid-work-model/
Ready to apply?
Apply to Nubank