Adrian René López Cintas

Healthcare care-management platform

• Worked on a Go microservice acting as a backend-for-frontend (gateway) for the platform's web application, loading large volumes of data from another microservice.
• Helped implement the back-end logic of a task-generation system: staff define patient criteria, the system generates follow-up lists, and a detail view lets them contact patients and record outcomes.
• Implemented caching strategies in the service's own PostgreSQL database to avoid repeatedly loading large datasets from the upstream service.
• Fixed a production report page that timed out on every request: it joined 10 tables over millions of rows against a 30 s limit. Redesigned the queries with CTEs and tighter joins, plus pagination and precise filters, bringing response times to 5–20 s depending on the filter volume. Before, it was slow regardless of how few results it returned.
• Designed a reusable Go abstraction for dynamic filtering and pagination over large tables.
• Reduced load in many other queries by narrowing the working set early instead of expanding rows and filtering afterwards.

Other Projects

• Built a full portal from scratch in Astro, implementing a provided design.
• Built the landing page for a product launch using Laravel.
• Worked on the front end of migrating a legacy .NET application to React.
• Migrated an end-to-end test suite from Cucumber to Cypress.

• Contributed to the front end of a web page for designing databases without needing to know SQL.
• Wrote Cypress end-to-end tests for every new feature and bug fix, so that fixed issues could not regress.
• Improved site performance with React best practices; contributed to core product development.

School e-learning platform

• Built core features of an online course platform developed for a single school.
• Worked under strict WCAG AA accessibility requirements, testing with screen readers on Windows and VoiceOver on macOS to reproduce and fix assistive-technology issues.
• Implemented an in-house text-highlighting library from scratch as part of the project's own component set.
• Integrated with Java/Spring Boot microservices, occasionally modifying their code.

• Worked on a platform built around dynamically generated forms: forms arrived as structured data and the front end rebuilt the UI from them at runtime.
• Contributed to the front end of an e-commerce site built with Vue.
• Built a mobile app with the core team in a hackathon, working on both the front end (React Native) and the back end (Express).
• Contributed to a React Native music-purchasing app.

• Built small JavaScript and React projects for clients.
• Wrote a script to add watermarks to videos, which led to a client getting back in touch two years later.

• Built two government websites from scratch.
• Developed a Drupal module for user authentication through EnZona, a Cuban digital payments platform.
• Maintained and extended existing government websites by adding new features.