Waldir J. Pereira Junior

With over 15 years of experience in web development, I am a senior full-stack engineer. I have a master's degree in data science from PUC-Rio, and I use my analytical and problem-solving skills to create and improve web applications that meet the needs of our users and clients.

At BeamJobs, I have developed thousands of lines of code in Angular and Django, released dozens of staging and production versions, and created an end-to-end test policy with Cypress. I have also performed code reviews, created UX/UI prototypes, and improved customer conversion through A/B testing. I am passionate about new technologies, testing, and software architecture, and I enjoy leading and collaborating with developer teams to deliver high-quality and innovative solutions.

Senior Full-Stack Engineer at BeamJobs (Remote)

• Developed thousands of lines of code in Angular (TypeScript) and Django (Python).
• Released dozens of staging and production versions.
• Created an e2e test policy with Cypress and got 100% of the main features covered (almost 30 tests for 14 features).
• Configured GitHub actions to publish branches on every pull request, then ran unit tests, ran e2e tests, and performed format checking (using Prettier for front-end and Black for back-end).
• Performed code review for all pull requests opened by the team, which increased substantially the code quality.
• Created UX/UI prototypes using Figma for a new application.
• Through A/B testing of new checkout pages and pricing plan combinations, improved customer conversion rate by 17%, representing a 10% annual revenue increase.
• Produced detailed design documentation, unit test plans, and documented code for a new project.

Skills: Continuous Integration (CI) · HTML · PostgreSQL · Git · Angular · TypeScript · Python (Programming Language) · Django REST Framework · Heroku

Master of Science - MSc. in Data Science - Pontifícia Universidade Católica do Rio de Janeiro (Puc-Rio)
Activities and societies: Clustering, Machine Learning, Neural Networks