[Job - 30348] Senior SDET (Software Development Engineer in Test), 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.

As a Quality Analyst Senior, you will play a critical role in ensuring the quality and performance of our software solutions. You will lead the design and implementation of comprehensive testing strategies, focusing on automated end-to-end flows and REST APIs. Collaborating with cross-functional teams, you will ensure our products not only meet but exceed client expectations.

• →Translate product stories and acceptance criteria into layered test strategies, including unit, API-contract, integration, E2E, and exploratory testing.
• →Design, execute, and maintain automated E2E flows for a modern React/Vite web app using Playwright (TypeScript).
• →Cover REST APIs (Python/FastAPI backends) with contract tests and behavior tests using pytest and HTTP clients (Postman/Bruno, httpx).
• →Verify constraint-based and optimization behavior through scenario-based tests, ensuring rigorous testing of feasibility and resource-fit rules.
• →Validate multi-tenant isolation, RBAC, and OIDC/OAuth2 flows to ensure tenant data integrity and security.
• →Build and maintain a lightweight exploratory/session-based practice to catch edge cases that scripted tests may miss.
• →Run root cause analysis on production/staging defects, driving fixes with clear reproducibility notes and evidence.

• Strong grasp of the testing pyramid and hands-on experience with functional and non-functional testing.
• Expertise in test automation for modern web apps (Playwright preferred or Cypress).
• Proficiency in REST API testing with contract-first tooling, able to design tests from an OpenAPI spec.
• Strong SQL/PostgreSQL skills for writing non-trivial queries and validating data.
• Comfort with modern issue trackers, GitHub, and CI/CD workflows.
• Advanced English proficiency.

• Experience in testing constraint/optimization systems.
• Proficiency in Python and pytest.
• Familiarity with multi-tenant SaaS testing and accessibility testing to WCAG 2.1 AA.
• Experience in performance/load testing and event-driven/async workflow testing.

At CI&T, we are driven by Collaboration, Innovation & Transformation. We leverage the power of AI to enhance our projects and foster an environment where your skills can thrive. If you're passionate about quality assurance and want to make a significant impact, we invite you to apply and be a part of our forward-thinking team.