Hi, I'm

Cornelius.

Full-stack developer & embedded engineer who ships software for the browser and the chip.

I build web apps, front-end experiences, automation bots and ESP8266-powered IoT controllers — 40+ projects, from React SPAs served off a microcontroller to a production LMS deployed on cPanel.

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40+projects shipped
45projects in the gallery
26live demo apps
10featured case studies
1k+automated tests written
7automation bots
About

Developer, tinkerer, one-man IT department.

I'm a developer who works across the whole stack — from the UI pixels to the pins on a microcontroller. My day-to-day covers full-stack web apps (React, Svelte, Flask), browser-based front-end projects, automation bots and embedded devices running custom firmware with their own embedded web apps.

Two things I care about: code that actually ships, and systems you can verify. That's why my bigger projects come with serious test suites — hundreds of unit tests, E2E suites and stress checks behind the scenes.

Focus

Web apps · Front-end · Back-end · IoT

Stack

React · Svelte · Flask · C++ · SQLite

Testing

Playwright · Pytest · Unity · Stress

Deployment

GitHub Pages · cPanel · LAN · Raspberry Pi

Work

The full gallery.

Skills

The tools behind the work.

Languages

Python TypeScript HTML/CSS Bash SQL JavaScript C++

Front-End

Capacitor MediaRecorder PWA Recharts Bootstrap WebSocket Web Speech API jsPDF React Bulma Tailwind Web Audio API MediaDevices WebRTC jQuery Vite Canvas Svelte

Back-End & Data

Alembic WordPress SQLite Node.js SQLAlchemy Flask Express REST APIs bcrypt JWT Jinja2

Embedded / IoT

Raspberry Pi GPIO ArduinoJson LittleFS ESP8266 Arduino PlatformIO ESPAsyncWebServer Diet Pi RFID (MFRC522)

Testing & Ops

GitHub Actions Phusion Passenger ESLint Pytest GitHub Pages Playwright Testing Library uv Gunicorn cPanel Unity Test Vitest Linux

Automation

WordPress API Telegram Bot API Cron & schedulers Beautiful Soup Scripts PDF tooling Selenium Scrapy Image processing
Certifications

Learning that's verifiable.

freeCodeCamp Legacy Front-End Developer certificate, 2018

Front-End Development (Legacy)

2018

freeCodeCamp

Verify
freeCodeCamp JavaScript Algorithms and Data Structures certificate, 2019

JavaScript Algorithms & Data Structures

2019

freeCodeCamp

Verify
freeCodeCamp Back-End Development and APIs certificate, 2022

Back-End Development & APIs

2022

freeCodeCamp

Verify
Contact

Let's build something.

Have a project, a role, or an idea worth wiring up? My inbox is always open.

corneal64dev@gmail.com