Open to opportunities

Andrej Kozlina

@andrejkozlina

Message

I am a software developer specializing in scalable backend web applications

Serbia

Message

What I'm looking for

I am seeking a backend or full‑stack role building scalable web and microservice systems with Java or PHP, in an Agile team that values TDD, clean architecture, mentoring, and work on real‑time or VoIP integrations; remote or hybrid considered.

I am a software developer with experience building scalable web and microservice systems, including a backend for a telecare platform that handled real-time alarm events and integrated with an Asterisk VoIP server. I have delivered payment integrations, e‑commerce and booking applications, and business tools that improved stability and reduced costs.

I work across Java and PHP stacks (Spring Boot, Laravel, Symfony) and use PostgreSQL/MySQL, Docker, Redis, ActiveMQ and AWS to deliver reliable APIs and services. I thrive in Agile/Scrum teams, practice TDD, mentor colleagues, and focus on performance, maintainability and secure integrations.

Experience

Work history, roles, and key accomplishments

Current

Freelance Java Developer

Current

Vicale ICT

Nov 2024 - Present (10 months)

Built a backend system to manage user data and handle real-time alarm events for a telecare platform, fully integrated with an Asterisk VoIP server. Developed and fine-tuned RESTful APIs and maintained Asterisk configuration to ensure secure, responsive voice communication.