Dipl.-Ing. Dejan Antanasković

Senior Software Engineer

I'm a seasoned software engineer with a strong focus on both backend and frontend development, particularly when it comes to building robust, scalable web applications. My work spans the full technology stack, enabling me to architect and deliver efficient, maintainable solutions for complex systems.

On my Tech Blog, I share insights and practical knowledge from the world of software engineering and information technology - aiming to inform, inspire, and contribute to the developer community.

Curious how my expertise could benefit your next project? Feel free to explore my project portfolio and online resume for a closer look at my work and experience.

PortfolioView Portfolio ResumeView Resume

Engineering Modern Applications with Proven Tools

With more than 20 years of practical experience, I’ve helped clients across Europe develop software that is stable, secure, and built to last. My work spans backend architecture, frontend development, database design, and system integration.

Here are the core technologies and tools I rely on to deliver high quality solutions.

Backend & Application Development

Robust server-side logic and scalable architectures for web and enterprise applications.

Java, Spring Boot
Node.js
Python
RESTful APIs, JSON, Data Serialization

Frontend & Web Interfaces

Crafting accessible and efficient user interfaces for cross-device compatibility.

JavaScript, TypeScript, Svelte, HTMX
Responsive layouts, UI/UX integration
HTML, CSS / SASS

Mobile App Development

Building elegant and performant mobile apps for Android and iOS.

Flutter, Dart
Cross-platform app architecture
State management, backend integration

Databases & Spatial Data

Deep understanding of geographic data structures and relational database optimization.

PostgreSQL + PostGIS
MySQL, MongoDB, Derby, H2
Query optimization, indexing, data integrity
Spatial data integration

DevOps & Containerization

Delivering consistent, containerized environments for development and production.

Docker for packaging and deployment
Build automation
Environment isolation, reproducibility

Server & Infrastructure

Managing and securing server environments with a focus on uptime and maintainability.

Linux administration
Apache web server
Postfix e-mail server
DNS, virtual hosting, domain setup
Firewall & network configs

Featured Projects

Geocoding & Location API

Geolocation service that identifies locations and routes based on unstructured addresses. Designed for seamless integration into e-commerce and logistics platforms.

Client: City Express

View case study

Antiquarian Bookstore

A multilingual e-commerce platform for rare and second-hand books. The platform offers a fully functional online bookstore with a full backoffice web application.

Client: Arka knjiga

View case study

Football Matches & Predictions

Cross-platform mobile app for football fans worldwide. Provides real-time match results, standings, detailed match statistics, prediction probabilities, and H2H comparisons.

Client: AntSoft

View case study

Selected Web Projects

A showcase of diverse and professionally executed websites — from healthcare to e-commerce and enterprise logistics — tailored to client needs and delivered with precision.

Multiple clients

View case study

View Portfolio

Latest Blog Posts

How I Dropped My Geospatial API Latency to 14ms Using Spring Boot and PostGIS

Jul 20, 2026

My geospatial REST API was hitting latency spikes up to 600ms on heavy PostGIS queries. Here is how I diagnosed a missing GiST index, reduced vertex density by 90% using adaptive topology simplification, and brought the average server-side response time down to a flat 14.67ms - without changing a single line of Spring Boot code.

Choosing a Text Embedding Model That Actually Fits Your Project

Mar 23, 2026Jul 20, 2026

A practical guide to choosing a text embedding model for real-world projects — covering the tradeoffs between size, speed, context length, and multilingual support across the most widely used open-source options. Includes a working Docker setup for multilingual search with no code required.

Building Ultra-Fast Spring Boot Websites with HTMX — No React, No Complexity

Dec 8, 2025

Learn how to build ultra-fast, SEO-friendly Spring Boot websites using HTMX instead of React. This guide shows how to simplify your architecture, improve performance, and ship features faster—with real code examples.

View Blog