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Hubert Kasperek

Hubert Kasperek

Full Stack Web Developer

Poland

About Me

As a full-stack developer from Poland, I combine modern technologies like Next.js and the T3 Stack with proven React and .NET solutions, specializing in full-stack web applications (from UI design → business logic → database architecture → deployment).

I thrive on solving diverse technical challenges and constantly experiment with new technologies – from exploring functional programming concepts in Haskell to optimizing low-level code in Rust, and even dabbling in AMD64 Assembly to better understand computer architecture fundamentals.

Experience

Founder & Full Stack Developer

Jul 2024 - 2025

BlitzyApp.com

  • Built SaaS no-code platform from scratch using T3 Stack, Next.js, React, tRPC, TypeScript, Tailwind CSS and Turso database
  • Implemented visual editor, authentication system and database integration
  • Empowering startups to validate ideas in hours instead of weeks

Internship - Programmer Technician (Technik Programista)

Oct 2023 - Nov 2023

Varico, Poznań

  • Developed full-stack web applications using C# .NET and Angular
  • Applied theoretical knowledge in practical, professional environment
  • Enhanced skills in modern web development frameworks

Internship - Programmer Technician (Technik Programista)

Apr 2023 - May 2023

Varico, Poznań

  • Developed full-stack web applications using C# .NET and Angular
  • Applied theoretical knowledge in practical, professional environment
  • Enhanced skills in modern web development frameworks

Education

Programmer Technician (Technik Programista)

2020 - 2025

Zespół Szkół nr 2 im. ppłk. dr. Stanisława Kulińskiego w Wągrowcu

Focus areas:

  • Computer science fundamentals, algorithms, and software engineering principles
  • Full-stack development: Web applications (ASP.NET, Angular), mobile apps, and desktop software
  • Database systems: PostgreSQL and MySQL administration
  • Professional internships: 2 months working as a web developer
  • Exam preparation: INF.03 and INF.04

Certificates

INF.04 Professional Qualification

Obtained in 2025

Central Examination Board of Poland

  • State-certified qualification for Programmer Technician
  • Focuses on application development using C#, .NET, TypeScript and Angular
  • Covers development of console, desktop, web, and mobile applications
  • Includes object-oriented programming and algorithm implementation

INF.03 Professional Qualification

Obtained in 2023

Central Examination Board of Poland

  • State-certified qualification for Programmer Technician
  • Validates proficiency in web development and database management
  • Covers front-end (HTML5, CSS3, JavaScript) and back-end (PHP) development
  • Includes practical database design and implementation tasks

Technical Skills

Frontend

Next.js
React
TypeScript
JavaScript
Tailwind CSS
Shadcn UI
HTML5
CSS3

Backend

T3 Stack
tRPC
C#
.NET
ASP.NET
Python
Rust

Databases

PostgreSQL
Turso DB
libsql/SQLite
Drizzle ORM
MySQL

Tools & Platforms

Git
OAuth2
Cloudflare Workers & Pages
Vercel
Docker
Linux

Key Projects

Blitzy - SaaS No-Code Platform

SaaS platform solving the problem of slow idea validation through visual no-code prototyping. Reduces time-to-market from weeks to hours.

T3 Stack
Next.js
React
TypeScript
Tailwind CSS
Turso
Cloudflare

AssistlyApp - Rapid Prototyping Exercise

Rapid prototyping exercise demonstrating product development under time constraints. Delivered cloud note management POC in 3 hours during hackathon, solving immediate need for centralized student resources.

T3 Stack
Next.js
React
TypeScript
Tailwind CSS
Turso
Cloudflare

Character Factory - AI Studio

AI persona engineering studio combining Stable Diffusion with LLMs. Used by 25k+ monthly users for character creation and AI research.

Python
Jupyter
Google Colab

Aichar - Python Library

Python character management library for cross-platform AI personas with faster processing via Rust core. 900k+ PyPI downloads.

Rust
Python
PyPI

AI Companion - Self-hosted Chatbot

Self-hosted AI chatbot engine with offline execution, CUDA/Metal acceleration, and real-time learning. 26MB Rust binary with web UI.

React
TypeScript
Rust
SQLite

Additional Skills & Achievements

Mentoring: Helped peers prepare for INF.03/INF.04 exams (Polish national IT certifications), focusing on algorithms, HTML5, CSS3, JavaScript, C#, .NET, Angular, and DevOps practices.
Open Source: Active contributor with multiple projects on GitHub, including libraries with 900k+ PyPI downloads.
Automation: Creating automation tools
Community: Active on tech social platforms.

Work Philosophy

I focus on solving real problems through innovative technical solutions. I believe in rapid prototyping, clean architectures, and continuous learning of new technologies. My projects are characterized by a practical approach - from idea to working product in the shortest possible time.