Full-stack developer building reliable software systems.
Specializing in .NET, React, and cloud infrastructure. Engineering scalable architectures and robust backend services with a focus on performance and maintainability.
Michał Witko
Software Engineer
LOCATION:
Warsaw, Poland
Experience:
5+ years
Status:
OPEN TO NEW OPPORTUNITIES
STACK
CORE STACK
C#
.NET
Vue
React
BACKEND
Web API
Entity Framework Core
LINQ
Hangfire
MassTransit
OpenAPI
Background Services
FRONTEND
React
Vue
TypeScript
TanStack Query
React Hook Form
Tailwind CSS
DATA & MESSAGING
SQL Server
Cosmos DB
Redis
Service Bus
Event Grid
ARCHITECTURE
Clean Architecture
Domain-Driven Design
Microservices
Modular Monolith
CLOUD & DEVOPS
Azure
Docker
CI/CD
Azure DevOps
GitHub Actions
Terraform
Linux
EXPERIENCE
.NET Developer
Jun 2026 - Present
Aviva · Warsaw, Poland
Developing .NET applications for insurance price prediction using AWS and cloud services.
Full Stack Developer
Jan 2025 - Jun 2026
CI Global · Rzeszów, Poland
Developed IoT platform APIs in .NET and back-office applications using Vue 3 and Nuxt.
Full Stack Developer
Jan 2024 - Dec 2024
Fabrity · Rzeszów, Poland
Delivered backend and frontend solutions and developed microservices for business applications.
Junior Full Stack Developer
Jul 2022 - Dec 2023
Fabrity · Rzeszów, Poland
Developed internal applications, low-code solutions, and maintained existing systems.
EDUCATION
M.S. Computer Engineering
Sep 2024 - Mar 2026
Rzeszow University of Technology · Rzeszów, Poland
Completed a master's degree in Computer Engineering.
B.S. Computer Engineering
Sep 2020 - Jul 2024
Rzeszow University of Technology · Rzeszów, Poland
Completed a bachelor's degree in Computer Engineering.
CERTIFICATIONS
Microsoft Certified: Azure Fundamentals
Completed
Microsoft · AZ-900
Validated foundational knowledge of Azure services, cloud concepts, security, and governance.
PROJECTS
AnimalRegistryV2
2025 - Present
active
Full refactor of the original AnimalRegistry to support multiple animal shelters, built with Clean Architecture and modular domain design. Open-source, under active development.
.NET
React
Terraform
Azure
GitHub Actions
NO_PREVIEW
AnimalRegistry
Jul 2023 - 2026
archived
Original platform for an animal shelter charity, with a custom architecture built to streamline shelter operations and data management. Superseded by AnimalRegistryV2.
.NET
Next.js
Azure
Azure DevOps
NO_PREVIEW
Portfolio
Jul 2026 - Present
active
This site - built with Astro, Tailwind CSS, and deployed on Cloudflare.
Astro
Tailwind CSS
Cloudflare
GitHub Actions
ChessLab
2026 - Present
active
Multiplayer online chess platform built with Claude Code: the co-operative 'Hand and Brain' variant plus a custom 'Card Chess' mode, with bots, Elo ratings, and Google login. Deployed via Docker to GHCR.
.NET
Blazor
SignalR
SQLite
Docker
Claude Code
Omarchy Plugins
3 plugins
active
Bar plugins for Omarchy, the opinionated Arch + Hyprland Linux distro by DHH: Docker control, uptime monitoring, and keyboard layout management, all built with QML and Quickshell.
QML
Quickshell
Bash
Explore plugins ->