Software Developer · Full-Stack · Bronx, NY

Jeansel
Lantigua

I build full-stack web applications that solve real problems for real communities. Experienced with React, Node.js, PostgreSQL, and everything in between — and always looking for the next challenge.

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GitHub ↗ LinkedIn ↗ Resume ↗

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0+ Students Taught

0 Projects Shipped

0 Courses Built

About

Who I Am

I'm a full-stack developer based in the Bronx with hands-on experience building and deploying production web applications. My work at HighBridge Voices gave me real-world experience owning an entire product — from database schema to deployed UI — serving both students and staff.

I'm fluent in JavaScript across the stack (React, Node.js, Express) and comfortable working with relational databases like PostgreSQL. I care about writing clean, maintainable code and shipping things that actually work.

Beyond building software, I've taught Java and web development to over 40 students — which sharpened my ability to communicate technical concepts clearly, a skill I bring to every team environment.

⚙️

Full-Stack Development

End-to-end ownership from database design to deployed frontend.

🔐

Auth & Security

Role-based access control, JWT sessions, and secure API design.

🚀

Deployment & DevOps

Comfortable shipping to Vercel, Railway, and managing production environments.

🧠

Problem Solver

OOP, data structures, and algorithmic thinking applied to real use cases.

Skills

Technical Stack

Languages

JavaScript Java Python C++ HTML CSS

Frontend

React Vite Next.js Responsive Design

Backend

Node.js Express REST APIs JWT Auth CRUD

Database & Infra

PostgreSQL Supabase Railway Vercel

Concepts

OOP Data Structures Algorithms Git / Version Control Debugging

Experience

Where I've Worked

Aug 2024 — Present Bronx, NY

Front-End Web Content Specialist

HighBridge Voices

Designed, built, and deployed a full-stack staff and student portal used in production, featuring role-based authentication with JWT, an interactive program calendar, announcements system, and a staff-only music library.
Implemented CRUD operations on a PostgreSQL database — songs receive unique IDs, are sorted alphabetically, and can be filtered by voice parts.
Maintain and update the public-facing website at highbridgevoices.org, adding new pages, UI improvements, and ensuring the application and donation flows work correctly.
Sole developer on the project — owned architecture decisions, deployment pipeline (Railway + Vercel), and ongoing maintenance.

React Vite Node.js Express PostgreSQL JWT Supabase Vercel Railway

Aug 2024 — Present Bronx, NY

Coding Instructor

HighBridge Voices at Brilla Pax

Designed and teach a Java Backend Development curriculum and a Web Development curriculum for students in grades 5–12.
Taught 40+ students across classes of 10–25, focusing on code reading, writing, debugging, and real problem-solving skills.
Created hands-on projects that build foundational programming skills and developer confidence.

Java HTML/CSS/JS Curriculum Design

Projects

Things I've Built

Featured

HighBridge Voices Website and Portal

Production full-stack portal serving students and staff. Built with role-based authentication, JWT sessions, an interactive calendar, announcements, and a music library with full CRUD — sorted by voice part and alphabetically. Sole developer from schema to deployment.

React Vite Express PostgreSQL Railway Supabase

Music Library API

Standalone REST API and React frontend for choir repertoire management. Full CRUD — create, search, update, and archive pieces by title, composer, and voice part. Later reused and extended as a module inside the Voices Portal.

React Node.js Express PostgreSQL

Minesweeper — Java

Fully functional Minesweeper clone with a Swing GUI. Implements random mine placement, recursive cell reveal, win/lose detection, and replayability. Demonstrates strong OOP fundamentals and Java GUI development.

Java Swing GUI OOP

School Database System

Java-based record management system that reads CSV files to populate student, staff, and professor records. Full CRUD with dynamic file parsing and structured data storage. Demonstrates file I/O, OOP design, and data management.

Java CSV Parsing OOP CRUD

JeanselLantigua