About Me | Joel Maria

Joel Maria

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I'm Specialized in

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Front-End & Mobile UI/UX Design

JavaScript

React

Redux

GraphQL

Next.js

React Native

Gatsby

HTML

Laravel

Python

Angular

Back-End Development

Node.js

Prisma

Django

Firebase

Docker

Kubernetes

AWS

Google Cloud

Supabase

01. About me

I’m a Senior Full Stack Developer with over 16 years of experience building web and mobile apps for FinTech, SaaS, and enterprise platforms. I specialize in React, React Native, Node.js, Python, and cloud technologies (AWS, GCP, Firebase), creating scalable and high-performance solutions. I enjoy leading teams, optimizing apps for millions of users, and integrating AI-powered and automation-driven features to deliver smarter software.

02. Interests and Hobbies

I enjoy exploring emerging technologies, contributing to open source projects, and staying active through running, cycling, and hiking. I also love traveling, discovering new cultures, and expressing creativity through photography, music, and design

03. Framework Preferences

I primarily work with React and React Native for building responsive web and mobile applications. On the backend, I prefer Node.js with Express.js or Fastify.js, and Python with Django for scalable and robust server-side solutions. I also have experience with GraphQL, Firebase, and cloud-native frameworks on AWS and Google Cloud.

Employment

Senior Software Engineer, React Native (Contract).

Spotify | Boston, MA

Launched the Spotify For Authors React Native app, serving over 500M users, leveraging Next.js 15 App Router, TypeScript, Node.js, and SSR for ultra-fast performance. Improved the Spotify Design System by creating accessible, WCAG-compliant components, enhancing UI consistency. Designed GraphQL schemas and optimized API performance using DataLoader patterns for efficient data fetching and pagination.

Apr 2022 - Present

Lead Frontend Engineer

U.S. Bank | Boston, MA

Built scalable React.js applications and Node.js APIs for commercial real estate and banking platforms. Automated CI/CD pipelines using Docker, GitHub Actions, and Jenkins, reducing release errors. Developed a finance-focused React component library with 90+ components and over 80% test coverage. Promoted to lead a team of 22 engineers, managing Agile delivery of enterprise FinTech solutions.

Jan 2020 - Apr 2022

Fullstack Engineer - Node.js/React.js (Contract)

Grax | Boston, MA

Developed SaaS products for Salesforce Data Protection, including Data Time Machine, Insights, and Replication. Delivered React.js/Redux dashboards and Node.js REST APIs with multi-cloud integrations across AWS, Azure, and GCP. Optimized the Node.js stack using MongoDB, Elasticsearch, and Heroku to enhance scalability and performance.

Jan 2018 - Jan 2020

Senior Software Engineer - Node.js/React

Costar | Boston, MA

Implemented secure authentication and authorization using Node.js/Express, Okta, and OAuth2, supporting over 5M daily logins. Developed a BFF architecture unifying microservices for 30M+ monthly users. Migrated monolithic APIs to microservices with Node.js, GraphQL Federation, and AWS, significantly improving system reliability.

Jun 2016 - Jan 2018

Fullstack Developer - Fraud Detection

Fidelity Investment | Boston, MA

Developed a Next.js/Node.js platform generating $20M in annual revenue. Migrated WebSocket infrastructure to custom Node.js/TypeScript webhooks, achieving annual savings of over $67K.

Jun 2015 - Mar 2016

Full-stack React.js Developer

Verizon Wireless Solutions | Boston, MA

Developed microservice APIs using Node.js and MongoDB to support Verizon’s nationwide cable infrastructure. Built cloud modules for Verizon’s IaaS platform, covering compute, storage, and networking services.

Mar 2014 - Jun 2015

Senior Mobile Engineer (Contract Role)

Bank of America | Boston, MA

Developed React Native features including biometrics, ML/OCR scanning, and an offline iPad app, serving over 46M users. Migrated Java monoliths to React microservices, handling over 1.6B transactions annually.

Nov 2012 - Feb 2014

CSS3 Lead Developer

TD Ameritrade | Boston, MA

Built a SASS/Compass framework with reusable mixins and responsive layouts, and extended Bootstrap to support multi-device responsive applications.

Apr 2011 - Nov 2012

Logistic and Last-Mile React Native App

Built over 100 React Native components and 40+ screens for a logistics and e-commerce app. Orchestrated 10+ Docker microservices using Kubernetes (Node.js, Django, Kafka, PostgreSQL) and deployed 60+ serverless Node.js functions to GCP and Firestore. Developed AI-powered GPS navigation with off-route detection and live traffic updates.

Jan 2024 - Present

Education

Tech. University of Santiago, Dominican Republic

Studies in Computer Science

2006-2008

Zend PHP 5 Certification Engineer

Zend Technologies

XML, JavaScript, HTML, CSS

W3Schools