React Js Customer Support

***************@*****.***

James Cordova

React Frontend Engineer

Mission, Texas, United States +1-956-***-****

Led the development of the Dragon Frontend Tap-and-Earn Telegram Mini App using TypeScript and React; enhanced user interface and experience, increasing user engagement by 25% based on real-time analytics. Implemented code splitting with React.lazy and Suspense, achieving a remarkable 40% reduction in initial load times; optimized images and assets through lazy loading techniques; improved user experience and satisfaction. Applied WebSocket and Socket.IO for efficient server-client communication, facilitating real-time data exchange and updates, which reduced latency by 40% and boosted overall application responsiveness. Architected the Telegram bot and backend infrastructure with Node.js, TypeScript, Nest.js, Prisma, and PostgreSQL, achieving a 30% improvement in backend response times while ensuring seamless integration of components. Executed comprehensive end-to-end testing with Playwright, validating application functionality across 15 different devices and platforms, ensuring optimal performance for over 50,000 monthly users. Configured GitHub Actions for CI/CD pipelines to automate testing, building, and deployment processes, enhancing development efficiency by 30% and reducing time to production. Spearheaded the redesign of user interfaces in collaboration with backend engineers and designers, resulting in a 15% increase in user satisfaction scores and a 15% decrease in customer support inquiries. Created a scalable React.js application that boosted user engagement by 40%; incorporated TypeScript for error reduction, leading to a 30% decrease in debugging time during development. Employed Jotai for state management, simplifying state handling and enhancing performance, leading to a 25% reduction in component renders and improved application responsiveness. Configured payment gateway solutions using Stripe and PayPal, processing over 10,000 transactions monthly, which increased payment success rates and decreased customer support inquiries related to payment issues. Developed and maintained unit and integration tests using Jest, ensuring code reliability and reducing bugs in a React application, leading to a 40% increase in test coverage and enhanced application stability. Integrated over 100 REST APIs using Axios, enhancing application functionality and ensuring seamless data communication by collaborating closely with the backend team, which contributed to a 10% increase in data processing efficiency. Deployed applications using AWS EC2 to ensure reliable and scalable performance, while managing project tasks and workflows in a Kanban environment using Jira.

Mentored a team of 2 junior developers in Next and TypeScript through structured coding sessions and personalized feedback; conducted 15+ code reviews on GitHub, yielding a 20% enhancement in code efficiency and quality. Executed web applications utilizing the latest technologies, including TypeScript and MUI, allowing for seamless integration and a 30% reduction in maintenance requests, showcasing increased application reliability. Streamlined user login and registration processes via Firebase Authentication, bolstering security and enhancing the user experience, resulting in a 25% increase in sign-up rates. Deployed TanStack Query for efficient data fetching and state management, optimizing performance and reducing loading times, which advanced responsiveness by 30%.

Facilitated collaboration among space operators, backend engineers, and designers to develop a shared framework, enhancing project clarity and alignment throughout all phases, minimizing miscommunication incidents by 30%. Integrated GraphQL in the frontend application to optimize data fetching, reducing over-fetching and achieving a 40% decrease in API response times while enhancing the user experience. Conceptualized GIT for version control to manage work progress, attending daily Scrum sessions. Work experience

Full Stack Engineer 02/2023 - 07/2024

DragonBotDevelopment, Remote

Led Frontend Engineer 09/2020 - 11/2022

Bite Ninja, Contact

Frontend Engineer 02/2019 - 08/2020

EZETech LLC, Contract

Developed responsive web applications using modern frontend technologies, specifically React and Tailwind CSS, to deliver seamless user experiences.

Formulated a structured approach for writing test cases with Playwright and Jest, establishing a foundational guide for team testing practices now adopted by 8 software engineers across projects. Coordinated the integration of best practices in architectural design, establishing a framework that supported the onboarding of 5 new services within six months, improving service delivery. Initiated a weekly progress tracking system for team projects, enabling real-time visibility into task completion; this approach refined accountability and helped the team maintain a consistent output of 95% of project deliverables. Frontend Developer 04/2017 - 11/2018

RubiTech, Contract

Education

B.S in Computer Engineering 04/2010 - 04/2014

Texas State University