Codexworker

Backend Developer

Go · PHP/Symfony · SQL · Docker · Linux

I work on backend systems — APIs, data pipelines, crawlers, integrations, performance issues. If you have a backend that needs building or fixing, I can help.

Available for contract work.

Remote · EU timezone

What I Can Help With

Backend is slow or has issues?

I look at database queries, memory usage, APIs, infrastructure — and fix what's actually causing the problem.

Need a new backend or API?

I build APIs and backend services in Go or PHP/Symfony. Production-ready from the start.

Need to process a lot of data?

I build crawlers, data pipelines and processing systems that handle large volumes of data.

Systems that don't connect?

I build integrations between APIs, databases, payment systems and other services.

Legacy code nobody wants to touch?

I work with existing codebases and improve them without rewriting everything.

What I Do

Services I provide.

Backend Development

Go and PHP/Symfony development for features, services and APIs.

API & Integrations

REST and third-party integrations. Connecting systems that need to work together.

Data Engineering

Scraping, data collection, processing and storage. Built for scale.

Performance & Optimization

Finding and fixing slow queries, overloaded services and unnecessary costs.

Docker & Linux

Deployment, debugging and production environment issues.

Legacy & Maintenance

Taking over existing codebases and making them better without unnecessary rewrites.

Core Stack

Backend
Go · PHP · Symfony
Databases & Data
PostgreSQL · MySQL/MariaDB · Elasticsearch · Redis
Infrastructure
Linux · Docker · Kubernetes · CI/CD
Communication
REST · RabbitMQ
Data
Web Crawling · Scraping · ETL · Data Pipelines

Selected Work

Systems I've built and operated in production.

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
Security Scanner

remotedaemon.com

Remote security scanner with ping and certificate checking.

Security Ping Certificate
More projects →

How It Works

01

Tell me what you need

Describe the problem or what you want to build.

02

We figure it out

I look at the problem and we agree on what needs to be done.

03

I do the work

Development, debugging, testing — whatever is needed.

04

You get results

Working code and a system that does what it should.

Contract Work

Available for:

Short-term projects

Fixes, integrations, specific problems.

Part-time

Ongoing backend work.

Long-term

Joining an existing team as a remote developer.

Remote · EU

Have a problem to solve?

Let's Talk

Have a Backend Problem?

If you have a backend that needs building, fixing, or improving — send me the problem.

I'll look at it and tell you what I think.

Hire Me

Get in Touch

Describe what you need help with.

Send Request