Senior Security Engineer (Offensive Security)

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 Nus 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.

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We are looking for curious driven individuals who are passionate about enhancing security maturity through offensive techniques and who think beyond their own lane. As a Senior Security Engineer on our Offensive Security team you wont just execute tasks: youll take ownership of identifying and mitigating security threats before they impact our customers Nubankers and financial assets.

Our Offensive Security team plays a strategic role at Nubank. By simulating real-world attacks we strengthen our security posture and continuously evolve our defense strategies to stay ahead of adversaries. We think boldly aim high and challenge our own assumptions about what secure looks like because the status quo is always a hypothesis to test not a boundary to accept.

Youll work closely with security engineers product teams and other stakeholders to educate guide and support them in building security in from the ground up. This is an exciting opportunity to drive real impact across the whole organization and to do it as an owner not just a contributor.

We believe diverse perspectives make our security stronger. Whether your background comes from CTF competitions bug bounty programs traditional pentesting or a non-linear path into offensive security we want to hear from you.

• Driving infrastructure web and mobile/API pentests end-to-end;

• Crafting and executing red team operations that challenge our defenses;

• Leading vulnerability management initiatives and helping prioritize remediation;

• Building tools that enhance offensive security reviews and automate repetitive tasks;

• Partnering with development squads to ensure security issues are understood and addressed at the root;

• Contributing to architectural and logical reviews of different systems and products.

Must have:

• Strong Offensive Security background with a focus on Red Team activities;

• Deep experience across the pentest lifecycle: reconnaissance enumeration exploitation post-exploitation lateral movement;

• Strong knowledge of current and historical attack vectors exploitation techniques and how to remediate them;

• Ability to replicate the behavior of Advanced Persistent Threat (APT) groups;

• Experience with security frameworks such as OWASP;

• Experience working in cloud environments (AWS preferred);

• Ability to harden and improve CI/CD Pipelines and experience with SDLC;

• Solid knowledge across security domains with strong depth in Operating Systems Networks Databases and Infrastructure Architecture;

• Experience with Threat Modeling.

Nice to have:

• Active participation in CTF competitions or Bug Bounty programs;

• Proficiency with security assessment tools such as Burp Suite Nmap Metasploit SQLmap Nessus Censys Shodan or or any equivalent tooling that supports security validation.

• 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

Hybrid 23 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 recruitment process may involve the use of artificial intelligenceenabled 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

Required Experience:

Senior IC