Hi, I am Hieu Le Van

a Front-End Developer, specializing in optimizing web applications for performance, accessibility and creating user-friendly interfaces.

Ho Chi Minh City, Viet Nam

About me

I'm Heterl0, a Front-End Developer with Full Stack and DevOps experience, passionate about crafting fast, responsive, and scalable web applications.

Over the past 3+ years, I've built and maintained production-grade websites and platforms using Next.js, Vite, Tailwind CSS, Chakra UI, React Query, and more. My work includes marketing sites, dashboards, and multi-tenant platforms serving 21,000+ users.

I've optimized Core Web Vitals (LCP, FID, CLS), improved SEO, applied code splitting, and reduced render-blocking scripts for better performance.

I love collaborating in Agile (Kanban) teams, doing code reviews, and keeping the codebase clean and scalable.

I'm happy to connect—not just for work, but also to share experiences. Let's chat on LinkedIn!

Experience

Recently work

Projects(9)

MonkeyType Analysis

Website and extension that log and analyze typing errors. Includes a static browser extension for MonkeyType and a Next.js dashboard to import and analyze JSON data.

Heterl0's Blog

A personal blog built with 11ty.js, fast static generation, markdown-friendly, optimized for SEO and performance.

Zenaiyoga (Landing Page)

Next.js landing page for a yoga app. Optimized for performance, includes animations, and SEO-focused.

Zenaiyoga - Dashboard

Next.js dashboard for managing yoga poses, exercises, blogs, and events with CRUD and WYSIWYG editor.

Zenaiyoga - Android

Flutter app using MediaPipe to detect and correct yoga poses, with streak and reward systems.

Zenaiyoga - Back End

Django REST API for yoga app, supports JWT auth, roles, and pose analysis with Celery and Swagger UI.

Multi-Tenant Demo

Next.js multi-tenant authentication demo with cookie-passing between subdomains.

Flash Van

Simple static landing page project using HTML and CSS only.

Recruitment Platform

Mock project from internship using Angular and PrimeNG, includes job search and interview features.