Fernando – React, Node.js, Next.js

A software company that was acquired by Consensus to build an interactive product demo platform for revenue teams.

• Worked on fixing and extending features for a web tool that records web pages and allows users to highlight specific components to guide end-users’ focus;
• Contributed to both frontend and backend functionality enabling automatic website recording and playback through customizable URLs;
• Built pages, styles, and reusable components using Redux, functional components, React hooks, Material UI, and related frontend technologies;
• Migrated multiple clients’ pages from HTML and jQuery to Angular for improved maintainability and modern standards;
• Designed microservices architecture using TypeScript and Node.js, reducing operational costs and improving scalability;
• Migrated legacy applications to a modern TypeScript codebase, improving performance and long-term maintainability;
• Mentored junior developers in TypeScript best practices, TDD, and code review processes, raising overall code quality and team productivity;
• Implemented unit tests to ensure a high-quality, reliable product;
• Designed and implemented comprehensive end-to-end tests to strengthen test coverage and improve release confidence.

An American automotive and technology company that designs, develops, and manufactures electric vehicles (EVs) and EV powertrains.

• Created the backend services that allow other systems to retrieve information about client orders;
• Built the full frontend application with multiple features to collect required user data and send it to an external API;
• Implemented a new feature called “loans” on both the frontend (React, Next.js) and backend (Nest.js with AWS);
• Successfully migrated a legacy JavaScript monolith to a modern TypeScript codebase, improving application performance by 30% and reducing maintenance overhead;
• Automated complex UI interactions (drag-and-drop, file uploads, dynamic data handling) across multiple browsers, ensuring consistent performance and cross-browser compatibility;
• Integrated Playwright tests into CI/CD pipelines (Jenkins, Azure DevOps), enabling automated nightly regression testing and accelerating release cycles.

A company that operates a bridge connecting Tijuana and San Diego, selling thousands of tickets for people crossing from Mexico into the United States.

• Designed and built the AWS architecture for the company’s new e-commerce platform for purchasing tickets;
• Developed the serverless backend, including the connections to external ticketing, parking and car rental APIs;
• Created multiple AWS Code pipelines to develop in different environments;
• Implemented robust error handling and type safety across applications, reducing production bugs by 30% and enhancing overall system stability;
• Spearheaded migration from Selenium to Playwright, improving test execution speed and reliability across multiple platforms.

A food management and delivery system for students used in major universities in Mexico and over 200 locations, featuring a POS, a mobile ordering app, and product and inventory management.

• Designed and developed a product from scratch to meet a need in the market, including its business plan and canvas model;
• Created a full restaurant system, which consists of a web CMS, a Windows desktop POS, an Android delivery application, an Android and iOS mobile applications;
• Managed and led a software team of 12 developers using Scrum and Jira for tracking tasks;
• Mentored junior developers through example tasks and early PR reviews until they were ready to contribute independently;
• Had direct communication with clients in order to understand their needs and translate them into Jira tickets;
• Worked side to side with customers to develop new functionalities for the product and support a help desk.