Cairê Guimarães cover
Cairê Guimarães
Cairê Guimarães

SDET · QA Automation Engineer | Playwright · Selenium · API testing · CI/CD | 400+ automated tests

Actively looking · Member since 24 Sep 2026
Location
São Paulo, Brazil
Desired salary
Unspecified
Work preference
Remote Only / Full Time
Experience level
Senior

About

Professional summary

I'm an SDET with 5+ years building test automation that teams actually rely on, mostly for banks and fintechs, all of it remote.

At GFT Technologies I developed and maintained 400+ automated Web and API tests (Java, Selenium WebDriver, Cucumber) for a top-tier banks digital channels. Regression coverage went from 60% to 80%, and the Jenkins pipelines I maintained cut the regression cycle from 16 hours to 2.

Before that I automated 300+ BDD scenarios for another bank at SIS Innov amp; Tech, and wrote 500+ test cases for a fintech at Digisystem.

These days I write browser tests in Playwright with TypeScript. I used it at GFT and at CiiRUS, and I keep my own Playwright and Selenium base projects.My most recent role was AI amp; Automation Specialist at CiiRUS, a US SaaS company. I ran 50+ production n8n workflows (2,269 executions in 7 days, 0% failures) and built LLM-powered internal tools with Claude. That work taught me to treat reliability as something you measure. It also means I can bring AI and workflow automation into a QA process, not just talk about it.

What I bring:
• Test automation: Playwright, Selenium WebDriver, Cucumber/BDD, API testing (Postman)
• CI/CD: Jenkins, GitLab CI, Docker, Git
• Languages: Java, TypeScript/JavaScript, Python, SQL
• AI amp; automation: n8n, Claude/OpenAI APIs, Supabase

English C2 · Spanish B1/B2 · Portuguese (native). Based in São Paulo (UTC−3), comfortable with full US hours.

Skills

27 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Application Utilities

Collaboration

Data Stores

Development

Languages & Frameworks

Experience

Career history

AI & Automation Specialist CiiRUS

Designed, deployed, and operated more than 50 production n8n workflows hosted with Docker. Integrated Meta Graph API, YouTube, LinkedIn, Google Analytics, company APIs, and Supabase to automate social-media publishing and daily marketing data synchronization for two brands.

Built a multi-account marketing dashboard using React and Supabase/PostgreSQL, consolidating approximately 100 paid campaigns across Facebook, Instagram, LinkedIn, and website performance. Built a content-calendar application deployed on Vercel with automated publishing to four social networks, eliminating around 10 hours of manual work per week.

Mapped automation opportunities across three departments, delivered two production automations, documented workflows node by node, and led a major n8n version upgrade with backups and zero data loss. Collaborated daily in English with US stakeholders, clients, and cross-functional teams.

Automation Analyst GFT Technologies

Developed and maintained more than 400 automated web and API tests in Java using Selenium WebDriver and Cucumber for a top-tier bank's digital channels. Increased regression coverage from 60% to 80%.

Maintained Jenkins CI/CD pipelines that executed automated suites for every release, reducing regression-cycle time from 16 hours to 2 hours. Collaborated with developers, product owners, QA professionals, and agile teams across four squads.

QA Automation Analyst SIS Innov & Tech

Created and maintained automated web and API test suites for banking products using Java, Selenium, and Postman. Covered more than 300 scenarios documented with BDD practices using Gherkin and Cucumber.

Managed CI/CD pipelines supporting continuous delivery and reduced manual regression effort by 50%. Worked in agile squads focused on continuous improvement, product quality, and reliable releases.

Mid-Level QA Analyst Digisystem

Executed functional, regression, and API testing for a fintech product. Wrote more than 500 test cases and tracked defects through Jira.

Introduced Selenium-based test automation for 30 critical user flows, improving coverage of key application journeys and supporting product quality initiatives.

Education

Learning history

UNIVESP

B.Sc., Computer Engineering

Bachelor of Science in Computer Engineering. Currently in progress; expected graduation in 2028.

Anhembi Morumbi University

B.A., Game Design

Bachelor of Arts in Game Design.

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