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Guilherme Freire

@guilhermefreire

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Quality Assurance Engineer specializing in manual and automated testing.

Brazil

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What I'm looking for

I'm looking for a role where I can lead QA automation and strategy within an Agile team, focus on improving E2E coverage and shift-left practices, and help deliver reliable, user-centered products while mentoring others and promoting continuous improvement.

I'm a Quality Assurance Engineer with nine years' experience driving test automation, improving end-to-end coverage, and embedding Agile practices to reduce bugs and accelerate reliable delivery. I specialize in Cypress and Playwright automation with JavaScript/TypeScript, exploratory testing, and crafting testing strategies that combine happy paths, edge cases and failure modes to improve product stability and user experience.

I've led initiatives that raised E2E coverage to ~80%, reduced average bugs per story dramatically, and introduced shift-left practices like desk checks and refinement participation to prevent defects earlier. I focus on customer empathy, continuous improvement and enabling teams to deliver faster, higher-quality solutions through automation, collaboration and pragmatic test design.

Experience

Work history, roles, and key accomplishments

Current

Quality Assurance Engineer

Current

Double

Mar 2025 - Present (10 months)

Designed and implemented a comprehensive E2E testing strategy using Playwright that expanded coverage beyond happy-paths, reducing staging and production bugs and improving overall user experience.

Playwright End To End Testing Exploratory testing Test Strategy Agile Root Cause Analysis Test Automation JavaScript TypeScript

QA Automation Engineer

FullStack Labs

Oct 2023 - Mar 2025 (1 year 5 months)

Automated E2E regression suites with Cypress to reach ~80% coverage, cut manual regression time, and lowered average bugs per story from 5 to 0.4 by promoting shift-left practices and refinement participation.

Cypress E2E Test Coverage Agile JavaScript Regression Testing CI CD

Software Quality Consultant

Thoughtworks

Jan 2021 - Jan 2023 (2 years)

Built an E2E automated testing suite from scratch for a 20-year legacy mobility system using Cypress, enabling safer feature delivery and increasing team confidence.

Cypress Legacy Systems E2E Test Strategy Pairing Mentoring Agile

Software Quality Engineer

Liferay

Jan 2020 - Jan 2021 (1 year)

Introduced collaborative test case reviews with engineers, reducing defects and improving team alignment which led to fewer post-release bugs.

Cross Functional Collaboration QA Processes Agile Manual Testing

Software Quality Jr

JoyStreet

Jan 2013 - Jan 2015 (2 years)

Planned and executed manual tests and detailed test cases for educational gaming features, enabling production releases with few defects and positive user feedback.

Manual Testing

Software Quality Jr

FAST

Jan 2012 - Jan 2013 (1 year)

Authored comprehensive test cases using equivalence partitioning and boundary analysis for complex features, improving clarity and speeding development delivery.

Equivalence Partitioning Boundary Value Analysis