Uzziel Sierra

I am a Senior Quality Assurance Engineer with over 9 years of experience in testing high-traffic web applications across various sectors, including e-commerce and digital media. My expertise lies in improving test efficiency and reducing defect rates by up to 35% through robust manual and automated testing strategies. I specialize in UI automation using Robot Framework with Selenium WebDriver and Python, and I have hands-on experience with Playwright, Cypress, and API testing using Postman.

Throughout my career, I have been recognized for my strong leadership and mentorship abilities, as well as my proactive QA mindset. I excel in cross-functional collaboration and have successfully executed QA processes throughout the entire Software Development Life Cycle (SDLC). My experience includes working in Agile/Scrum teams, where I make confident, risk-based QA decisions to ensure product quality and business success. I am passionate about fostering a culture of continuous improvement and driving QA excellence.