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.
We're looking for a Senior QA Automation Engineer to join an international team building highly scalable payment solutions.
This is an opportunity for someone who enjoys solving complex technical challenges and is passionate about quality, automation, API testing, and performance testing.
What you'll be doing- Design, develop, and maintain automated test solutions.
- Validate REST and GraphQL APIs.
- Perform API contract testing to ensure compatibility between providers and consumers.
- Execute functional, integration, and end-to-end testing.
- Develop and execute performance and load testing using JMeter.
- Collaborate closely with developers, Product Owners, and Scrum teams throughout the SDLC.
- Identify edge cases, improve test coverage, and help drive quality from the early stages of development.
- Investigate defects, analyze root causes, and support continuous improvement.
- Senior-level experience in QA Automation.
- Advanced English (daily communication with international teams).
- Strong experience with API testing using Postman.
- Experience with Contract Testing (PACT or similar frameworks).
- Experience with performance and load testing using JMeter.
- Experience with REST APIs (GraphQL is a plus).
- Knowledge of automation frameworks such as Cucumber, JUnit, Mockito, WireMock, and REST Assured.
- Experience with mutation testing (PIT) is a plus.
- Strong analytical and problem-solving skills.
- Ability to think through edge cases and complex business scenarios.
- Comfortable working in Agile environments.
- Experience in the payments or fintech industry.
- Knowledge of security testing (DAST/OAT).
- Experience working with CI/CD pipelines.
Location: Hybrid – São Paulo, Brazil
Language: Advanced English required
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Skills Required
- Senior-level experience in QA Automation
- Advanced English for daily communication with international teams
- Strong experience with API testing using Postman
- Experience with Contract Testing (PACT or similar frameworks)
- Experience with performance and load testing using JMeter
- Experience with REST APIs
- Knowledge of automation frameworks such as Cucumber, JUnit, Mockito, WireMock, and REST Assured
- Ability to execute functional, integration, and end-to-end testing
- Ability to identify edge cases, improve test coverage, and drive quality early in development
- Investigate defects, analyze root causes, and support continuous improvement
- Comfortable working in Agile environments
- GraphQL experience
- Experience with mutation testing (PIT)
- Experience in payments or fintech industry
- Knowledge of security testing (DAST/OAT)
- Experience working with CI/CD pipelines
- Strong analytical and problem-solving skills
- Ability to think through complex business scenarios
What We Do
CI&T is your end-to-end digital transformation partner. As a digital native, we bring a 27-year track record of accelerating business impact through complete and scalable digital solutions. With a global presence of 6,000+ professionals in strategy, research, data science, design and engineering, we unlock top-line growth, improve customer experience and drive operational efficiency.
