EryyynIT

Backend Developer · Go / Python

I build software, games, and things that weren't here yesterday.

This is the personal hub of EryyynIT — a backend developer who ships Go and Python services, experiments with infrastructure and AI, and builds an indie game on the side. Pick a path below, or scroll for the details.

Projects Resume GitHub UndeadOverhaul

Backend
Go
Python
Distributed Systems
Game Development
AI

Projects

Selected work

What I've built and shipped — a small selection with the strongest evidence first.

Selected work

Commercial · AdTech

ADNova

Commercial

Commercial product in the AdTech / CPA space. My work here is backend and product engineering — production development, not a study prototype.

Commercial experience — production systems, not sandboxes.

Details available in Resume

Async Payment Processing Service

Experiment

An event-driven payment microservice built with FastAPI and RabbitMQ — outbox pattern, dead letter queue, idempotency and webhook notifications. A hands-on look at reliable messaging and retry logic.

Built to get comfortable with event-driven architecture — and with what happens when a message arrives twice, out of order, or not at all.

FastAPIRabbitMQPostgreSQLDocker

View on GitHub

queue

Experiment

A small in-memory queue broker written in Go, stdlib only, exposed over an HTTP API with two endpoints. Built to understand FIFO semantics and concurrency without a framework in the way.

Wanted to feel how a queue works from the inside before reaching for the big tools.

GostdlibHTTP API

View on GitHub

More experiments

MailingTGBot

Tool

A Telegram broadcasting bot in aiogram v3 — admin, sub-admin and moderator management, plus a mailing system that sends messages to users.

Pythonaiogram v3

View on GitHub

go-exercises

Ongoing

Self-made Go exercises — goroutines, channels, workers, select, cancellation, error handling and project layout — each one a small task with a written solution.

GoConcurrency

View on GitHub