Java

Flutter

Docker

PostgreSQL

Available for Freelance Work

Miroslav Mitrović

Java • Spring Boot • Flutter • PostgreSQL • Docker

Full Stack Developer specializing in Java, Spring Boot and Flutter. I build scalable business applications, mobile apps and cloud infrastructure from backend architecture to production deployment.

View Projects Contact Me Live Demo

Production Projects

Business-ready applications

Full Stack

Backend, mobile and deployment

iOS / Android / Web

Cross-platform delivery

NFC + GPS

Real-world integrations

Docker Deployment

Production hosting workflow

FLAGSHIP PROJECT

Bijelic TimeTrack

Production workforce management platform built from scratch.

A full-stack employee time tracking system designed for real-world business operations. The platform combines Flutter, Spring Boot and PostgreSQL with GPS geofencing, NFC attendance, offline-first synchronization and role-based administration. Built, deployed and maintained in production.

GPS Geofencing NFC Check-In / Check-Out Offline Synchronization JWT Authentication Role-Based Access PDF Reporting Multilingual UI Docker Deployment

Live Demo Case Study

TimeTrack Architecture

Application Flow

Flutter ↓ REST API ↓ Spring Boot ↓ PostgreSQL

Production

Docker ↓ Nginx ↓ Linux VPS

The application is built around a Flutter frontend communicating with a Spring Boot REST API backed by PostgreSQL. Production services are containerized with Docker and exposed through Nginx on a Linux VPS.

About Me

I'm a Full Stack Developer focused on building complete software solutions — from backend architecture and databases to mobile applications and production deployment.

I work primarily with Java, Spring Boot, Flutter, PostgreSQL and Docker, with a focus on reliable applications that solve real business problems.

I enjoy working across the entire stack, including authentication, APIs, databases, infrastructure, geolocation, NFC and offline systems.

Featured Technologies

Technologies organized by how they are used in production projects.

☕

Backend

Java • Spring Boot • Spring Security • REST APIs • JWT • Maven

Core Services

💙

Frontend

Flutter • Dart • Android • iOS • Web • Responsive UI

Cross Platform

🗄️

Database

PostgreSQL • JPA • Hibernate • SQL

Data Layer

🐳

Infrastructure

Docker • Linux • Nginx • VPS • SSL

Production Operations

Featured Projects

Production-focused projects with end-to-end implementation and deployment.

Bijelic TimeTrack

Full-stack employee time tracking platform with GPS geofencing, NFC attendance, offline synchronization and production deployment.

Flutter Spring Boot PostgreSQL Docker JWT NFC + GPS

Live Demo Case Study

Advokat Paločević

Professional law office website with responsive design, SEO optimization and clear service presentation.

Spring Boot HTML CSS

Bijelic Reinigung

Commercial cleaning company website with inquiry forms and professional business presentation.

Java Spring Boot PostgreSQL

Experience

Freelance Full Stack Developer

2024 — Present

Design and develop full-stack business applications
Build Flutter applications for iOS, Android and Web
Develop Spring Boot REST APIs with authentication and authorization
Design and manage PostgreSQL databases
Deploy production applications using Docker and Nginx
Manage Linux VPS infrastructure and SSL configuration
Integrate NFC, GPS and offline-first functionality

Production & Infrastructure

Docker • Linux • Nginx • PostgreSQL • VPS • SSL

Get in Touch

Have a project in mind or need help building a custom application?

Email: mmtrvc33@gmail.com

Germany