Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 14 days ago

Senior Security Engineer (AI Security)

Nubank95 open roles

Where
São Paulo
Work mode
Hybrid
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowSenior Security Engineer (AI Security)Nubank · São Paulo

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on Nubank's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

11.5% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.1%1 day
  2. 4.4%3 days
  3. 11.5%7 days
  4. 18.1%14 days
  5. 35.6%30 days
  6. 44.6%60 days
This job: posted 14 days ago

The posting

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 https://www.nu.com/2026-en

About the role

We are looking for a Senior Security Engineer to work closely with our teams to strengthen the security and resilience of our AI ecosystem. In this role, you will identify and assess security risks across machine learning models and Generative AI applications, design and implement security controls, and help build security frameworks and tooling for the safe adoption of AI at scale.

You will partner with engineering teams to integrate security throughout the AI development lifecycle, automate security assessments and controls, and contribute to the continuous evolution of our AI security practices. This role combines hands-on security engineering, risk analysis, and applied AI security, requiring strong technical expertise, sound judgment, and a proactive mindset to help ensure the secure and responsible use of AI technologies.

Main Responsibilities

- Identify and analyze vulnerabilities, providing insights and recommendations for mitigation;

- Contribute to the development and implementation of cutting-edge security frameworks, ensuring the responsible and secure usage within our AI ecosystem;

- Work closely with development teams to integrate security measures into the AI development lifecycle;

- Assist in incident response planning specific to AI-related security incidents and participate in simulations to test response effectiveness;

- Develop and integrate tools to automate security assessments and controls;

- Proactively seek knowledge and engage in research and development initiatives to support innovation;

- Raise Nubank awareness towards safe AI usage.

Must Have

- Knowledge of security frameworks, such as OWASP;

- Programming skills in languages commonly used in machine learning (e.g., Python);

- Proactive mindset with the ability to analyze complex systems and identify potential security risks;

- Strong communication skills to effectively convey complex security concepts to technical and non-technical stakeholders.

- Hands-on experience with CI/CD pipelines and implementing security tools (e.g., SAST, DAST, SCA).

- Experience with high scalability environments.

- Experience in zero-trust and regulated environments.

Nice to Have

- Experience with AI frameworks and libraries (e.g. PyTorch, TensorFlow);

- Expertise with automation programming languages (e.g. Bash, Ansible, Go);

- Knowledge of cloud infrastructure technologies (e.g. AWS, K8S, Terraform);

- Knowledge of Machine Learning and Generative AI concepts and technologies (e.g. HuggingFaces, MCP).

Role Location

Hybrid: Belo Horizonte, Rio de Janeiro, São Paulo, Campinas - SP.

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/

Explore how we build technology at Nubank:

🔗 https://building.nubank.com.br/building.nubank.com.br http://building.nubank.com.br ↗

🎥 https://www.youtube.com/@building.nubankyoutube.com/@building.nubank http://youtube.com/@building.nubank ↗

🎧 Listen to our stories on Spotify https://open.spotify.com/show/4hAJnAkYKXl42hLXa4LmVQ ↗

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 https://script.google.com/a/macros/nubank.com.br/s/AKfycbwvrewE58oGSbRWIVv8CyCWN68GLxpPVsfYYXv-ZHg94QFsTJmi82rF1x0yt-OTs2W0DQ/exec

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against Nubank's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on Nubank's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    Nubank's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.