[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.

At CI&T, we are seeking a highly skilled and motivated Quality Analyst Senior to join our team in Brasil . You will contribute to an innovative project in a collaborative, innovative, transforming, and multicultural environment.

Position Overview:

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.

Key Responsibilities: What you'll do

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.

Required Skills and Qualifications:

Must-have Skills:

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.

You'll stand out if you have:

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.

Join Us:

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.

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