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zephir-x/README.md

Hi there, I'm Kacper! 👋

🚀 Software Engineer | .NET & React | Cloud-Native & Azure

I specialize in building robust C#/.NET backends, dynamic React frontends, and deploying them using modern Cloud-Native architectures. From designing relational databases and enforcing Clean Architecture, to writing Terraform infrastructure as code and configuring automated CI/CD pipelines, I enjoy owning the entire development lifecycle. My approach to software engineering is pragmatic: keep the architecture decoupled, automate deployments, and always write tests.


🏆 Featured Projects

  • ☁️ Azure Infrastructure Hub - Cloud Management Platform:
    A centralized cloud management architecture provisioned via Terraform on Microsoft Azure. Features isolated VNETs, Zero Trust security with Managed Identities, Azure Container Apps (including Sidecar patterns), and automated CI/CD deployments via self-hosted GitHub Actions runners.
  • 🏋️‍♂️ GymCore - E2E Fitness SaaS Platform:
    A highly-concurrent SaaS platform for fitness clubs. Built with .NET 9, React & TypeScript, and PostgreSQL. Features strict Clean Architecture, CQRS, Stripe API integrations, and optimistic concurrency control.
  • 🎮 GameNest - Digital Game Distribution Platform:
    Digital Game Distribution Platform built from scratch with custom MVC architecture (Pure PHP, Vanilla JavaScript, HTML5 / CSS3). Fully containerized and adapted for cloud environments.

💡 Beyond the Code

  • 🎓 Education: Currently pursuing a B.Sc. in Computer Science at Cracow University of Technology (2023 - 2027).
  • 🤝 The Soft Edge: Thanks to my background in professional customer service, I don't just write code - I solve real problems. I'm used to high-pressure environments and translating complex technical jargon into plain, actionable language.
  • 🤖 AI Workflows: Certified by Google. I actively leverage Prompt Engineering and AI tools to write better code and streamline my daily development processes.
  • 💬 Ask me about: The .NET ecosystem, Cloud-Native architecture, Terraform & Azure, SQL database design, or CI/CD pipelines!
  • 📫 Reach me: kacper.gumulak@gmail.com | LinkedIn
  • Fun fact: I love solving problems - both in code and while interacting with people. When I'm away from the keyboard, you can find me running, hitting the gym, exploring new tech trends, or practicing my Spanish!

🛠️ My Complete Tech Stack

🛡️ Backend & Architecture

C# .NET ASP.NET Core Clean Architecture CQRS (MediatR) Node.js MVC

🌐 Frontend

JavaScript TypeScript React React Query HTML5 CSS3 Tailwind CSS WPF

🗄️ Databases

PostgreSQL MySQL SQLite EF Core

☁️ Cloud, DevOps & Tools

Microsoft Azure Terraform GitHub Actions Docker Docker Compose Linux (WSL) Nginx Vite Postman Git GitHub

🤖 AI & Automation

Google Gemini AI Agents Prompt Engineering AI Automation

💡 Core Concepts

OOP SOLID Principles Decoupled Architecture Zero Trust Security Optimistic Concurrency


📊 Comprehensive GitHub Stats

Kacper's GitHub Streak
Kacper's GitHub Stats
Kacper's Top Languages

"Let's build something exceptional together."
🌐 Check out my full portfolio site

Pinned Loading

  1. game-store game-store Public

    GameNest - Digital Game Distribution Platform.

    HTML

  2. portfolio-site portfolio-site Public

    My own portfolio site.

    CSS

  3. gymcore gymcore Public

    GymCore - Modular Monolith Fitness Ecosystem (.NET Core & React).

    TypeScript 2

  4. finance-tracker finance-tracker Public

    Desktop finance management app.

    C#

  5. geniuszmath75/dotnet-programming-pk geniuszmath75/dotnet-programming-pk Public

    Collection of .NET laboratory projects completed at Cracow University of Technology.

    C#

  6. azure-infrastructure-hub azure-infrastructure-hub Public

    Enterprise Cloud-Native Infrastructure & Deployment Ecosystem.

    HCL

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