Alexander is available for hire

Alexander Quinones

Verified Expert in Engineering

Full-stack Developer

Location

Tamarac, FL, United States

Toptal Member Since

July 8, 2020

Alexander is a full-stack developer with nine years of experience and deep expertise in JavaScript. He has structured and built multiple-scale, mobile responsive web apps with the user experience always front of mind. Alexander adheres to the don't repeat yourself (DRY) principle and the KISS approach, and he's passionate about working with motivated teams and getting things done.

Front-end Full-stack Full-stack Development Back-end UI Components Cloud Node.js JavaScript React jQuery TypeScript AngularJS CSS HTML5 Sass

Portfolio

Collab

React, Redux, Redux Thunk, Next.js, Material UI, Node.js, Express.js...

Riptide

PostgreSQL, Node.js, TypeScript, React, SCSS, JavaScript, Full-stack, Cloud...

SmartSite

Amazon Web Services (AWS), MongoDB, Elasticsearch, Google Cloud Platform (GCP)...

Experience

Node.js - 8 years React - 7 years JavaScript - 7 years jQuery - 7 years TypeScript - 6 years Angular - 5 years Redux Thunk - 4 years Vue - 4 years

Availability

Full-time

Preferred Environment

Visual Studio Code (VS Code), Slack, Git, MacOS

The most amazing...

...platform I've built allows users to book hotels and flights very easily through the user-friendly search and filter bar.

Work Experience

Senior Full-stack Engineer

2020 - 2021

Collab

Developed and maintained multiple projects including video creator and content, dashboard, analyze platforms using React, Redux, Next.js, Jest, Node.js, and Express.
Upgraded front-end applications with Next.js and built and maintained components reusable based on the design system.
Reduced the bundle size for the app performance and refactored the codebase using best practices.
Fixed some bugs and improved user features on both the front end and back end.
Wrote some test cases with Jest for React components.

Technologies: React, Redux, Redux Thunk, Next.js, Material UI, Node.js, Express.js, JavaScript, ECMAScript (ES6), TypeScript, Jess, Full-stack, GraphQL

Full-stack Developer

2018 - 2020

Riptide

Developed and unit-tested software that met the business and technical design requirements.
Maintained code coverage quality for all new components built close to 100%, emphasizing test-driven development.
Implemented utility scripts and Grunt plugins for DevOps automatization.
Customized map components based on complex logic and implemented geocoding.

Technologies: PostgreSQL, Node.js, TypeScript, React, SCSS, JavaScript, Full-stack, Cloud, MySQL, Google Cloud, SQL

Full-stack Developer

2016 - 2018

SmartSite

Built an admin management web app for LockTrip, the hotel and flight listing platform, using React and TypeScript.
Developed an advanced filter and sorting feature based on the Elasticsearch engine.
Built a user-friendly, multifilter Elasticsearch component that was reusable and multifunctional.
Implemented pagination, with infinite loading, for the list using Elasticsearch.
Fully tested all the components using Jasmine and Mocha test frameworks.

Technologies: Amazon Web Services (AWS), MongoDB, Elasticsearch, Google Cloud Platform (GCP), Django, TypeScript, React, Python, JavaScript, Full-stack, MySQL, UI Components, Java

Full-stack Developer

2015 - 2015

DunRite Technologies

Rewrote a WordPress application as a single-page app by using Vue.js and Node.js.
Developed all pages as responsive and pixel perfect.
Fixed bugs related to the UI and fully tested the front end using Jasmine.

Technologies: Bootstrap, PostgreSQL, Node.js, Vue, ECMAScript (ES6), JavaScript, Full-stack, Cloud, MySQL, Spring Boot, SQL

Full-stack Developer

2014 - 2015

JatApp

Built and maintained medium-sized projects as user-friendly and mobile responsive with AngularJS and Node.js.
Developed many RESTful API endpoints by using Node.js.
Architected a robust and stable structure on both the front end and back end.
Handled complex table relationships on the database.

Technologies: jQuery, AngularJS, JavaScript, CSS, HTML, Full-stack, MySQL, Algorithms, UI Components, Java, Spring Boot

Experience

LockTrip

https://locktrip.com/

LockTrip is a decentralized, open-source bookings ecosystem for hotel rooms, private property rentals, and flights. I built and maintained this project, working with motivated team members and using React and Django.

Video Content Platform

I worked as a senior full-stack engineer and upgraded the front-end application from React to Next.js. I Wrote some test cases with Jest. Also, I fixed some bugs, improved user features and upgraded React components based on the design system.

Video Streaming Platform

https://www.beeyou.tv/#/

I worked on the video streaming platform as a senior front-end developer to build their internal application. Built and maintained the project from scratch with React Hooks, TypeScript, Material UI, Redux, Redux Thunk.

Skills

Languages

JavaScript, ECMAScript (ES6), TypeScript, HTML, CSS3, CSS, HTML5, SCSS, Sass, PHP, Java, GraphQL, SQL, Ruby, Python

Frameworks

Redux, Angular, AngularJS, Bootstrap, Express.js, Next.js, Material UI, NestJS, Tailwind CSS, Spring Boot, Django, Ruby on Rails (RoR), Flask, Laravel, Cypress, Jest

Libraries/APIs

React, Vue, Vuex, Vue 2, Material 2, Node.js, jQuery, REST APIs

Tools

Git, Mongoose, Redux Thunk, Jess, Elastic, Prisma, Slack

Paradigms

Agile Software Development, DevOps, Microservices, Search Engine Optimization (SEO)

Platforms

AWS Lambda, WordPress, Google Cloud Platform (GCP), Amazon Web Services (AWS), Azure, Kubernetes, MacOS, Visual Studio Code (VS Code), Heroku

Storage

MongoDB, MySQL, PostgreSQL, Google Cloud, Elasticsearch

Other

Semantic UI, Front-end Development, Full-stack Development, APIs, Front-end, Full-stack, Back-end, Cloud, UI Components, User Experience (UX), User Interface (UI), Web3, Algorithms, Storybook

Education

2010 - 2014

Bachelor's Degree in Computer Science

Florida Southern College - Lakeland, FL, USA

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