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oyehiazarian/README.md

Hi, I'm Oleksandr 👋

Java Developer
Karlsruhe, Germany

LinkedIn GitHub Website Email

About me

I'm finishing my IT apprenticeship (Fachinformatiker Anwendungsentwicklung, IHK) at United Internet AG in Karlsruhe in July 2026. Over nearly three years I've worked in production developer teams — building backend services, designing database models, and integrating into complex architectures with Kafka, CI/CD and Scrum.

On the side I built a distributed microservice system from scratch, end-to-end: architecture, API design, JWT security, Kafka messaging, Telegram bot delivery, and Docker deployment. All public on GitHub.

Available for a permanent Java Developer role from August 2026.

🛠️ Tech stack

Languages

Java JavaScript TypeScript

Frameworks & APIs

Spring Boot Spring Security Jakarta EE Hibernate JUnit 5

Databases & Messaging

PostgreSQL MySQL MongoDB Apache Kafka

DevOps & Tools

Docker GitLab CI/CD Jenkins Maven Linux Git

📌 Featured project

Event Notification Service

Java Spring Boot Spring Security Apache Kafka PostgreSQL React Docker Compose Telegram Bot API JWT

Distributed microservice system built independently from scratch.

  • Backend 1 — JWT-secured REST API, event persistence in PostgreSQL, async forwarding via Apache Kafka
  • Backend 2 — Kafka consumer with recipient routing logic and real-time push via Telegram Bot API
  • Frontend — React admin client for managing events
  • One-command deployment of all 5 services via docker-compose up --build

Everything — architecture, API design, database model, JWT security, containerization, documentation — designed and implemented solo.

📊 GitHub stats

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