Available for opportunities

Adapt. Build. Improve. Repeat. web

Full-stack developer passionate about crafting clean, performant digital experiences. I turn ideas into products people love to use.

Xinjie Zheng, full-stack developer
Open to work Full-time & freelance

Crafting with care,
shipping with purpose

Hey, I'm Alex — a developer based in Barcelona, Spain. I specialize in building full-stack web applications and intuitive mobile experiences. Currently studying Application Development at IES Tech, where I'm sharpening my skills across JavaScript, Kotlin, and databases.

When I'm not writing code, you'll find me exploring open-source projects, diving into game mechanics design, or experimenting with new frameworks. I believe great software is invisible — it just works, and it feels right.

4+
Projects
3
Languages
2
Years coding

Selected projects

A handful of things I've built. More on GitHub.

Quiz Game application screenshot
Kotlin Jetpack Compose Android

QuizMaster App

An Android quiz game with animated transitions, score tracking, and multiple difficulty levels — built with Jetpack Compose.

Restaurant management system screenshot
MongoDB Node.js JavaScript

Restaurant Manager

Backend system for restaurant order and inventory management with a NoSQL database and real-time queries.

More coming soon

New projects in progress. Check GitHub for updates.

Technologies I work with

Tools and languages I use to bring ideas to life.

JavaScript
JavaScript
Kotlin
Kotlin
Node.js
Node.js
Express
Express
MongoDB
MongoDB
PostgreSQL
PostgreSQL
MySQL
MySQL
HTML5
HTML5
CSS3
CSS3
Android
Android
Git
Git
Docker
Docker

Find me online

I'm always open to interesting conversations, collaborations, or just saying hi.