Codexworker

Backend Developer

Building data-intensive systems that power real products

I design and build backend infrastructure, data pipelines, and large-scale crawlers. Available for long-term projects — Prague, Brno, Bratislava or remote.

Technologies & Tools

Languages and tools I use daily to build, deploy, and maintain production systems.

Go
PHP
Rust
Python
JavaScript
TypeScript
MySQL / MariaDB
ElasticSearch
Redis
Docker
Kubernetes
gRPC
REST API
Microservices
System Design
Linux
Git
CI/CD
Scraping
Data Pipelines

What I Build

Custom software, data automation, and system integration — built for your business.

Custom Web Systems

I build the software behind your website or app — user accounts, data management, automation, and everything that makes your product work.

Data Automation

Automatic systems that collect, process, and organize data for you. Market research, reports, monitoring — set it up once and get results continuously.

Connecting Your Tools

Making your existing tools and services work together. Payment systems, email, analytics — one smooth workflow without manual data moving.

Keeping Things Running

Maintenance, optimization, and making sure your system stays fast and reliable as your business grows.

Projects & Products

Real-world systems I've designed, built, and scaled.

Price Intelligence Engine

Cenoskop / Levnobot

Crawler monitoring millions of products. Processing 30M products daily and comparing them.

Data Aggregation Scraping ElasticSearch
US Price Intelligence

Niftycent

Price intelligence engine for the US market. Processing large-scale product data.

Data Aggregation Scraping Big Data
Traffic Analysis

AnalyticsForWebsite

Custom solution for collecting and evaluating traffic metrics with emphasis on processing speed and minimizing backend load.

Performance Optimization Data Collection
Secure Communication

Paidshield

Chat application with end-to-end encryption.

End-to-End Encryption Real-time Communication Security
DNS Security

Synopsee

A Cleaner, Safer Internet. Take control of your DNS. Block ads, trackers, and malicious sites with customizable profiles.

DNS Security Privacy
Disk Usage Analyzer

spacestat

Rust-based TUI disk usage analyzer.

Rust TUI System Utility
Job & Services Marketplace

facha.sk

Find a job or offer your services.

Job Marketplace Services Go