portfolio@localhost:~
user@host:~$ whoami
Arkadiusz Król
Senior Full-Stack Developer & DevOps Engineer
user@host:~$ cat profile.txt
Backend • Infrastructure • E-Commerce • Data Parsers • AI
user@host:~$ cat status.txt
Got an interesting project? Feel free to reach out!
user@host:~$

$ ls -la ./expertise/

Core competencies across multiple domains

> Backend & Frameworks

>

PHP

Modern PHP 8.x, OOP, Design Patterns, SOLID Principles

>

Symfony

Symfony, API Platform, Advanced DDD Architecture

>

Laravel

Laravel, Eloquent ORM, Livewire, Optimization

> Databases & Storage

>

MySQL

MySQL/MariaDB: Design, Optimization, Replication, Monitoring

>

PostgreSQL

PostgreSQL: Advanced Features, JSON, Full-Text Search

>

MSSQL

MSSQL Server: Complex Queries, Reporting Services

>

Elasticsearch

Elasticsearch: Indexing, Complex Searches, Log Analysis

> DevOps & Infrastructure

>

Linux/Debian

Debian/Ubuntu System Administration, Hardening, Security

>

Docker

Docker, Docker Compose, Multi-Stage Builds, Optimization

>

Kubernetes

Kubernetes: Orchestration, Scaling, Monitoring

>

AWS

AWS (EC2, RDS, S3, CloudFront, IAM, Lambda)

>

Self-Hosting

Self-Hosted Infrastructure, Dedicated Servers, VPS Management

> Languages & Scripting

>

Python

Python: Web Scraping, Data Processing, Automation

>

Node.js

Node.js: Express, Real-Time Apps, Streaming

>

Bash

Bash Scripting, Automation, System Administration

>

.NET

C#, .NET: Small Applications, Integration

>

Android

Android Development, Native Applications

> E-Commerce Platforms

>

PrestaShop

PrestaShop Expert: Modules, Plugins, Customization

>

WooCommerce

WooCommerce: Optimization, Custom Plugins, Integrations

>

Optimization

Performance Tuning, Conversion Optimization, Scaling

> Data Processing & Parsing

>

Parsing

Web Scraping, XML/JSON/CSV Parsing, Data Extraction

>

Data Structures

Data Structuring, Normalization, Validation

>

Big Data

Large Dataset Handling, ETL Processes, Optimization

> AI & Automation

>

LLM Integration

LLM Integration (OpenAI, Local Models, Custom)

>

AI Agents

AI Agents, Business-Specific Solutions, Automation

>

Private Hosting

Private Model Hosting, Data Privacy, Custom Training

$ grep -r "technologies" .

My current tech stack and tools

> Languages

  • PHP 8.x
  • Python
  • Node.js
  • Bash
  • C#

> Backend & Frameworks

  • Symfony
  • Laravel
  • API Platform
  • Express

> Databases

  • MySQL
  • PostgreSQL
  • Elasticsearch
  • Redis

> Infrastructure

  • Docker
  • Kubernetes
  • AWS
  • Linux/Debian

> Platforms

  • PrestaShop
  • WooCommerce
  • WordPress

$ cat about.md

about.md

# About Me

I'm a passionate Senior Full-Stack Developer specializing in complex backend systems, scalable infrastructure and and data-driven solutionswith over 5 years of professional experience.

# What I Do

  • Building high-performance web applications with PHP, Symfony, and Laravel
  • Designing and managing scalable cloud and self-hosted infrastructure
  • Specializing in e-commerce platforms (PrestaShop, WooCommerce) - implementations, customizations, and optimizations
  • Creating sophisticated data parsers and structuring solutions
  • Implementing AI/ML solutions with custom agents and private hosting
  • Automating systems and monitoring using DevOps best practices

# Specializations

  • E-Commerce Solutions: Full implementations, module development, and performance optimization for high-traffic sites.
  • Infrastructure & Hosting: Private server management, dedicated/virtual hosting selection, and architecture design.
  • Data Processing: Parsing, extraction, normalization, and integration from various sources and formats.
  • Private AI Hosting: Business-specific AI agents, custom model deployment, and data privacy.

# Philosophy

I believe in writing clean, maintainable code and building systems that are reliable, scalable, and and secure by design.Self-hosting and infrastructure management are more than hobbies to me—they are fundamental to achieving full control and optimization of systems.

20+ Years of Experience
300+ Projects Completed
99.9% Average Uptime

$ ./contact --init

Have an interesting project or question? I'd love to hear from you.

contact@localhost:~

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Status

Available for new opportunities