• Cut work from months to days by designing the incremental adoption of Next.js for the Ruby on Rails migration to React, shipping iteratively and constantly.• Reduced the response time of critical APIs by up to 80% by optimizing queries and introducing a queue system for heavy work. • Shaved off +50% of the web app bundle size through lazy loading and package optimization, resulting in improved Core Web Vitals (SEO).• Executed partnerships with huge academic portals, including arxiv.org, driving traffic growth and expanding reach to 25M monthly visitors.• Together, all that translated to a +644% increase in monthly active users.• Drove a seamless migration from MongoDB to PostgreSQL with close-to-zero downtime; reduced infrastructure costs by 65% while enhancing data retrieval speeds.• Crafted data pipelines in Python and Ruby for crawling and indexing over 400K AI models from academic journals, enriching the company's most valuable dataset.

• Engineered a scheduled trip system from map integration and geolocation tracking with native SDKs, down to GraphQL APIs and push notifications; impacting +6K drivers in NYC.• Improved auth security and efficiency by implementing Single Sign-On (SSO) and a new onboarding process, reducing friction and increasing driver signups.• Created an internal library of reusable and testable components, optimizing the development process and ensuring long-term maintainability for both driver and rider apps.

• Participated in the development of a lunch-matching feature that scheduled over 100K lunches in 6 different countries.• Designed and led the system migration from PHP to Node.js and Next.js, improving page load times and various SEO metrics.

• Led a team of 4 engineers in the development of a mobile warehouse system used by +90K employees; worked closely with the product manager to gather requirements and translate them into actionable engineering tasks; architected robust GraphQL APIs; established and documented best practices for state management and caching.• Crafted elegant and testable UI components used by multiple teams across various applications, including those for AB InBev and Soriana, potentially reaching over 200K users.

• Led a project partnership with one of the largest accounting companies in Rio de Janeiro, working closely with stakeholders and designers to understand feature requirements and translate them into reliable data models and software.• Developed high-quality, responsive user interfaces using React, Ant Design, and SASS, ensuring a seamless UX across all devices; devised robust NestJS APIs following OOP principles.• Mentored and guided new engineers through their onboarding process, providing support and knowledge transfer to speed up their productivity within the team.

• Recreated the company website with Gatsby (SSG) and other best practices, which resulted in a 35% increase in SEO metrics and a blazingly fast website.• Implemented row-level security policies in PostgreSQL and documented the whole process to enrich the company's knowledge.• Played a key role in the development of the MVP, building important features from the backend to the frontend.