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Andrew User

@andrewuser26

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I build high-traffic web and mobile applications with React, React Native, TypeScript, and cloud platforms.

Brazil

Message

I've built high-traffic web and mobile products for QuikTrip, TOTVS Latam, Mission Cloud, and NavigatorCRE. At QuikTrip, I engineered a React/Next.js application, improved team efficiency by 45%, reduced loading times by 30%, and increased checkout completion by 10%.

Across eight years in software development, I've delivered React and React Native applications, native iOS and Android modules, cloud integrations, CI/CD pipelines, and scalable frontend architectures. I also mentor teammates through code reviews and use Agile practices to move projects from design through delivery.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Engineer

Current

QuikTrip

Oct 2021 - Present (4 years 11 months)

Engineered a high-traffic web application using React.js, Next.js, TypeScript, and Tailwind CSS, boosting team efficiency by 45% through agile methodologies. Revitalized a React dashboard with layered abstraction, improved site performance by 30% with NodeJS APIs, and integrated Auth0 and Stripe for enhanced security and payment processing.

React Next.js TypeScript Tailwind ReactContext React Hooks Redux React Query Ant Design NodeJS Figma Adobe Illustrator OpenAI API AWS Lambda API Gateway Auth0 Stripe Azure DevOps CI CD Agile Scrum Kanban Terraform

Senior React & React Native Engineer

TOTVS Latam

Jul 2022 - Jul 2023 (1 year)

Developed a SaaS React/Next.js web app from scratch with isomorphic architecture for SEO, built an admin dashboard with rechart.js, and crafted cross-platform mobile apps using React Native. Implemented native iOS and Android modules, conducted unit testing with Jest, Mocha, and Chai, and reduced system failure rates by 70%.

React Next.js React Native TypeScript Redux React Router Express Rechart.Js Elasticsearch Objective C Swift Java Jest Mocha Chai AWS Azure GCP Babel ES6 JSX

Senior Software Developer

Mission Cloud

Oct 2019 - Aug 2021 (1 year 10 months)

Spearheaded UI development using React, Redux, HTML5, CSS3, JavaScript, and Bootstrap, and utilized Gatsby.js for static site generation with GraphQL, achieving high web vital scores. Built hybrid mobile apps with React Native, integrated third-party libraries, and migrated applications to React 17.

Full Stack Developer

NavigatorCRE

Nov 2017 - Oct 2019 (1 year 11 months)

Engineered dynamic, multi-browser compatible pages using HTML5, CSS3, JavaScript, jQuery, React JS, React Native, and AJAX. Upgraded React components, implemented Redux Saga with GraphQL, and designed PostgreSQL schemas with SQLAlchemy, while automating services with Docker.