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cristian guerraCG
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cristian guerra

@cristianguerra

QA Automation Engineer at CI&T validating banking and payments microservices with contract tests and AI-augmented QA.

Colombia
Message

At CI&T, I validate a banking and payments platform as it moves from a monolith to microservices. I use Karate and RestAssured contract tests, expressed in Cucumber/Gherkin and certified in Xray, to catch integration defects before UAT.

I also verify AWS Lambda services end to end and trace transactions with CloudWatch Logs Insights. For business-critical flows, I write Playwright and TypeScript tests in GitHub Actions, and I use AI-assisted workflows to speed up test creation and maintenance while human-reviewing the output.

At Source Meridian, I designed and built API automation in Java/Serenity and Karate, containerized it with Docker, and integrated it into Jenkins so regression ran with every pipeline execution. I also created K6 performance scenarios and reports to inform release decisions.

Earlier, I automated web, API, and mobile tests across SQA, Tata Consultancy Services, CLM Digital Solutions, and Algar Tech. Through GWAR TECH, I built and operate Playwright suites across production web platforms and multi-agent QA tooling on the Claude API.

Experience

Work history, roles, and key accomplishments

CI&T logoCI
Current

QA Automation Engineer

Jan 2024 - Present (2 years 10 months)

Quality engineering for a high-volume banking and payments platform migrating from a monolith to microservices. Implemented contract testing, serverless validation on AWS, AI-augmented QA workflows, and E2E web automation with Playwright and TypeScript.

CS

QA Automation Engineer

CLM Digital Solutions

Jan 2021 - Jan 2022 (1 year)

Automated API testing with Postman and Karate, and load/stress testing with K6 and JMeter for microservice backends. Set up environment observability with Grafana and containerized environments with Docker.

AT

Quality Analyst

Algar Tech

Jan 2018 - Jan 2019 (1 year)

Performed web test automation in Java/Selenium/Cucumber and C# cross-browser automation with Git version control.

Education

Degrees, certifications, and relevant coursework

AA

Anthropic Academy

Claude Code 101, Claude Code

Completed Claude Code 101 with a verified completion badge in September 2026.

AA

Anthropic Academy

Claude Code in Action, Claude Code

Completed Claude Code in Action with a verified completion badge in September 2026.

SENA logoSE

SENA

Technologist, Analysis and Development of Information Systems

2016 - 2018

Technologist degree in Analysis and Development of Information Systems from SENA, completed from 2016 to 2018.

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