[Job - 31028] QA with Security Fix Validation Expertise, Brazil

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions.

With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy.

We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day.

At CI&T, our rapid growth is fueled by the innovative solutions we create for our global clients.

We are seeking a detail-driven QA  to safeguard quality on a security remediation squad serving a large US mortgage lender. Remediation at volume is where regressions hide, and you will be the control that keeps throughput from costing the client stability — proving each fix works and nothing else broke.

Responsibilities:

• Validate remediation fixes by confirming the vulnerability no longer reproduces and intended behavior remains intact.
• Design and execute regression testing around each fix, focusing on the blast radius of dependency upgrades and configuration changes.
• Build and maintain automated regression coverage for the areas the squad touches most frequently.
• Define testable validation and closure criteria together with the developers so "fixed" is a verifiable statement.
• Produce validation evidence the client's risk program can attach to closure records.
• Execute testing across the client's AWS environments and verify deployment behaves consistently between them.
• Raise quality risk early when a fix's scope is broader than it first appears.
• Integrate automated tests into the client's CI/CD pipeline.

Requirements:

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• Experience as QA or quality engineering for web applications.
• Good English communication skills (reading, writing, and speaking) — direct collaboration with a US-based engineering team.
• Proven capability in both manual exploratory testing and test automation.
• Test automation experience with a modern framework such as Cypress, Playwright, or Selenium.
• API testing experience with Postman, REST-assured, or an equivalent tool.
• Strong regression testing discipline, including the ability to scope what a change could have broken rather than re-running everything.
• Comfort testing PHP web applications hosted on AWS, including the ability to read PHP well enough to understand what a fix changed.
• Experience integrating automated tests into CI/CD pipelines.

Nice to Have:

• Security testing exposure — validating vulnerability fixes, OWASP-based test cases, and basic penetration testing concepts.
• Performance testing experience with JMeter or k6.
• SQL proficiency for data validation.
• Prior experience on a remediation or technical debt squad.
• Experience in mortgage or financial services.
• Experience working with international clients.

Join CI&T and be a part of our mission to ensure quality never becomes the trade-off for speed. If you have a passion for quality engineering and want to own validation on work that directly reduces a client's security risk, we want to hear from you!

#LI-JM5

Our benefits:   -Health and dental insurance -Meal and food allowance -Childcare assistance -Extended paternity leave -Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; -Profit Sharing and Results Participation (PLR); -Life insurance -Continuous learning platform (CI&T University); -Discount club -Free online platform dedicated to physical, mental, and overall well-being -Pregnancy and responsible parenting course -Partnerships with online learning platforms -Language learning platform And many more!   More details about our benefits here: https://ciandt.com/br/pt-br/carreiras   At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here.This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it.   We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.