Himalayas Candidate
candidate@example.com
Remote
Dear Hiring Manager,
I am excited to apply for the Quality Assurance Engineer position at Nubank. With a strong background in software testing, test automation, and continuous integration, I am enthusiastic about contributing to Nubank's mission to simplify and democratize financial services across Brazil and beyond. I am particularly drawn to your customer-first approach and data-driven culture and would welcome the opportunity to help ensure the reliability, security, and performance of products millions of customers rely on daily.
Over the past six years I have built a robust QA skill set across functional, API, and performance testing. At a previous role with a Brazilian fintech, I led the automation effort using Selenium WebDriver, Cypress, and REST-assured, increasing automated regression coverage from 18% to 72% within nine months. That initiative reduced production defects by 35% and shortened release validation time by 40%, enabling two-week release cycles with higher confidence. I am proficient with test design techniques, BDD with Cucumber, and scripting in Java and Python. I also built and maintained CI/CD pipelines in Jenkins and GitLab CI to trigger test suites on every pull request, and I integrated test results with Jira for transparent defect tracking and faster triage. Additionally, I hold an ISTQB Foundation-level certification and regularly use Postman and k6 for API and load testing.
What excites me about Nubank is your clear emphasis on exceptional user experience, scalability, and rapid iteration. My career goal is to combine deep technical testing expertise with product-minded thinking to shift quality left and embed strong automated validation into the development lifecycle. I believe I can add immediate value by improving end-to-end test reliability, increasing observability of flaky tests, and collaborating closely with engineers and product managers to define measurable quality metrics (e.g., reducing escaped defects by X% quarter-over-quarter). I am also passionate about mentoring junior testers and establishing testing best practices that scale across teams.
I would welcome the opportunity to discuss how my hands-on experience with test automation, CI/CD, and performance testing can support Nubank’s continued growth and product excellence. Thank you for considering my application—I am eager to contribute to a team that builds delightful and secure financial experiences for millions of customers.
Sincerely,
Lucas Silva
