Leonardo Sánchez

Developed the frontend for a financial services platform using React, Next.js, and React Native. Optimized user workflows through effective state and form management with React Hook Form and Redux, reducing user errors and improving form completion rates. Built and refined reusable UI components with Tailwind CSS and React, accelerating feature delivery and maintaining design consistency.

Reduced regression bugs by 50% during release cycles by implementing automated testing with Cypress, Playwright, and Jest. Improved code quality and reduced integration issues by adopting TypeScript for strict typing and reliable API communication within a MERN stack. Enhanced backend integration and data flow using Laravel and C#, improving overall platform responsiveness and consistency.

EdTech platform helping children learn new languages and encouraging reading through interactive digital books. Engineered modular components with React, Next.js, Styled Components, and TypeScript, reducing page load times by 30%. Improved media content delivery and backend automation by integrating Azure Blob Storage and Azure Functions, resulting in a 45% decrease in server load. Automated Docker-based CI/CD workflows to optimize deployments, reducing production bugs. Boosted system performance through optimized MongoDB queries and in memory caching, reducing data retrieval times by 40%. Designed and maintained robust GraphQL APIs using Apollo and Node.js, supporting increased concurrency during peak classroom usage. Adapted the web application for mobile platforms using React Native, enabling cross-platform compatibility and reducing development time by reusing over 80% of the codebase.

SaaS and ERP development for enterprise-grade HR and asset management systems. Developed a centralized authentication system using Node.js and React, reducing login-related user errors by 35% and improving session reliability within modules. Built accessible and responsive UI components using Next.js and Tailwind, increasing module accessibility and improving user experience between desktop and mobile platforms.

Designed a browser-based video interview tool using NestJS, boosting HR team engagement and supporting asynchronous evaluations. Tested and validated the permission stepper component using Jest, ensuring unit test coverage and reducing onboarding-related bugs in video workflows. Optimized MongoDB clusters for high-traffic scenarios, reducing query latency and ensuring reliable performance through datasets exceeding 10 million records. Deployed automated CI/CD pipelines using Docker and GitHub Actions, reducing rollback incidents and bugs..