[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.
#LI-CI
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:

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.