Lead Security Engineer (Threat Detection)

Nubank; São Paulo; Híbrido; BRL 420 000 - 780 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Equity potential

Meal/Vale card

Public transportation benefits

Healthcare plan

Dental plan

Parental support programs

Remote work allowance

Gym partnerships

30 days vacation

Relocation assistance

Resumo da oferta

Nubank is seeking a senior Threat Detection Lead to guide a team protecting 135 million customers. You will own end-to-end detection programs, including intelligence gathering, modeling, and incident response, with AI-enabled capabilities and purple-team validation.

Build scalable, auditable security processes and align with regulatory expectations. You will mentor engineers, collaborate with security engineering and threat intelligence, and drive continuous improvement across detection,

Qualificações

• Proven hands-on threat hunting and incident response experience.
• Technical leadership in identifying, analyzing and responding to complex security threats.
• Experience developing and maintaining detection-as-code to automate threat ID and response.
• Proficiency in logging/forensics data analysis in security operations.
• Experience with SIEM/EDR tools and security platforms such as WAFs, firewalls and IDS/IPS.
• Experience integrating threat intelligence feeds to improve detection.
• Proficiency in SQL for security data querying.

Responsabilidades

• Analyze threat intelligence and telemetry to build robust detections and reduce false positives.
• Lead AI-assisted detection lifecycle adoption with measurable security outcomes.
• Define validation and security controls for AI capabilities and mitigate risks.
• Conduct Purple Team activities with cross-domain collaboration to validate detections.
• Identify gaps, drive remediation and measure detection coverage and response times.
• Foster a culture of ownership and continuous learning within the team.
• Collaborate with Security Engineering, Threat Intelligence, and Incident Response to build scalable, trusted security solutions.

Conhecimentos

Threat hunting

Incident response

Detection-as-code

SIEM/EDR

Cloud security

SQL

English proficiency

Leadership

Ferramentas

Palo Alto

Cisco ASA

WAFs

Descrição da oferta de emprego

About Nu

Nu 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.

Proprietary 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. Visit our Institutional Page

About the role

You will lead the team that stands between adversaries and 135 million customers. The Threat Detection team proactively hunts for security threats and builds robust, actionable detections to protect both customers and Nubankers — operating as a true Security Operations Center, backed by strong engineering power and intelligence from our internal Threat Intelligence team.

As Lead, you own the strategic Threat Detection program end to end: intelligence gathering, threat modeling, detection engineering, AI-assisted analysis, Purple Team validation, incident response and post-incident learning. Your goal is to make sure effective detection rules, actionable insights and AI-enabled security capabilities are in place and aligned with industry best practices, so that adversary activity across Nubank's environment is identified, prevented and detected before it reaches our customers.

You’ll also build and lead a high-performing team, support Security leadership in building a world-class security organization, and ensure detection processes meet auditing requirements and support clear communication with regulatory bodies.

Learn more about Nubank Infosec: https://blog.nubank.com.br/infosec-nubank-protecao-dados/

You’ll be responsible for

• Analyzing cyber threat intelligence, emerging attack trends and security telemetry to develop robust detections and threat models, while reducing false positives and improving the efficiency of security operations.
• Leveraging AI and machine learning across the detection lifecycle — anomaly detection, behavioral analytics, alert triage, threat intelligence enrichment, investigation prioritization and response automation — and leading their adoption so these capabilities are reliable, measurable and secure.
• Defining validation, quality, explainability and security controls for AI-assisted capabilities, accounting for risks such as inaccurate outputs, data leakage, prompt injection, model manipulation and adversarial evasion.
• Leading Purple Team activities with Offensive Security, Threat Intelligence, Incident Response and Engineering: translating adversary behaviors into realistic attack simulations, adversary emulation plans and detection validation scenarios mapped to frameworks such as MITRE ATTACK.
• Identifying detection and prevention gaps, validating security controls, measuring detection coverage and driving remediation through actionable improvement plans.
• Establishing feedback loops between offensive and defensive teams so lessons from simulations and real incidents continuously improve detection, investigation and response.
• Defining success criteria and tracking metrics: detection coverage, validation success rate, false-positive reduction, investigation time, response efficiency and remediation cycle time.
• Building and leading the team — mentoring engineers and fostering a culture of ownership, accountability, collaboration and continuous learning.
• Partnering closely with Security Engineering, Threat Intelligence, Software Engineering and Incident Response to build scalable solutions for analyzing security event data and a resilient security architecture aligned with Business Unit strategy.

We are looking for a person who has

• Solid hands-on experience with Threat Hunting and Incident Response, including handling and resolving complex security incidents.
• Experience as a technical leader in the identification, analysis and response to complex security threats, providing mentorship and guidance to team members.
• Experience developing and maintaining detection-as-code solutions to automate threat identification and response.
• Proven experience in information security operations, with expertise in managing, analyzing and deriving insights from logs and other security-related data.
• Proficiency with SIEM and EDR tools, and with security platforms such as WAFs, firewalls (e.g. Palo Alto, Cisco ASA) and IDS/IPS.
• Experience using and integrating threat intelligence feeds to improve detection.
• Proficiency in SQL for querying and managing security-related databases.
• Knowledge of cloud security principles and experience securing cloud environments across providers (e.g. AWS).
• Track record of developing processes, measuring results and delivering continuous improvement.
• Strong communication skills, a genuine team player and team leader, able to thrive in a team where diversity is key to high performance.
• Advanced English.

Location for this opportunity (City, Country)

• São Paulo, Brazil
• Campinas, Brazil
• Rio de Janeiro, Brazil
• Belo Horizonte, Brazil

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/

Our 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. To maintain a consistent and fair process for every candidate, Nu does not provide individualized technical feedback. See how our policy works here