Pero Grubač | Backend Developer

// who am i

About Me

I'm a Software Engineering graduate from Banja Luka with a focus on backend systems. I build reliable, scalable applications — from microservices to mobile apps.

My work spans distributed systems with RabbitMQ and Docker, real-time platforms, REST APIs, and full-stack web applications. I'm comfortable across multiple ecosystems and enjoy picking the right tool for the job.

Currently working professionally as a backend developer and open to freelance collaborations on interesting backend, API, or full-stack projects.

{
  "name": "Pero Grubač",
  "role": "Backend Developer",
  "degree": "Software Engineering",
  "focus": [
    "Distributed Systems",
    "REST APIs",
    "Microservices"
  ],
  "languages": [
    "Java", "C#", "Python"
  ],
  "open_to": "Collaborations"
}

// what i've built

Featured Projects

01 / 04

Microservices

Incident Alert

Real-time incident tracking and management system built on a microservices architecture. Uses event-driven messaging via RabbitMQ and Docker for containerized deployment across multiple services.

ASP.NET C# React RabbitMQ Docker PostgreSQL Microservices JWT REST APIs

Backend Frontend Management

02 / 04

Full Stack

eMobilityHub

Electric vehicle rental management platform with role-based access for admins, operators and managers. Features analytics dashboard, PDF invoice generation, vehicle tracking, RSS feed integration, CSV bulk vehicle import, and a separate JSP-based promotions management app. Fully containerized with Docker and Nginx reverse proxy.

Spring Boot Java Angular TypeScript JSP MySQL Spring Security Docker Nginx JWT

GitHub

03 / 04

Security

Chat Room

Secure internet forum with role-based access for administrators, moderators and users. Features two-factor email authentication, JWT sessions, OAuth2 Google login, WAF protection, SIEM logging, and full SSL/TLS encryption via Nginx reverse proxy. Containerized with Docker.

Spring Boot Java React MySQL Spring Security JWT OAuth2 Docker Nginx

GitHub

04 / 04

Distributed

Online Library System

Distributed library platform with three independent applications — library, member, and supplier — communicating via WebSockets, RMI, and message queues. Integrates Redis for inventory and Project Gutenberg for book data.

Java Redis WebSocket RMI RabbitMQ REST APIs

GitHub

// more work

Mobile

FitForge

Fitness tracking Android application for logging workouts, tracking progress, and managing training plans.

Flutter Dart SQLite Android

GitHub

Mobile

AssetManager

Android app for tracking company assets with barcode scanning, Google Maps, and multi-language support.

Flutter Dart SQLite Android

GitHub

Mobile

ETF Oglasi

Mobile app for university announcements with offline caching, push notifications, and localization. Graduation thesis project.

Flutter Dart SQLite Android

GitHub

Desktop

Store Management

Desktop app for retail store operations with role-based access, CRUD, password hashing, and audit logging.

C# .NET MySQL WinForms

excuse.exe is a zero-dependency, offline-capable PWA that generates a random excuse at the press of a button.

JavaScript HTML/CSS PWA

Live Demo GitHub

Pero
Grubač

About Me

Tech Stack

Languages

Frameworks

Infrastructure