Open to opportunities

Konstantin Petrovic

@konstantinpetrovic

I’m a senior PHP developer specializing in high-performance, asynchronous backend systems and real-time event-driven architecture.

Serbia

Message

What I'm looking for

I’m looking for a senior backend role where I can build high-performance, asynchronous, event-driven PHP systems—especially real-time and distributed architectures—working with AWS and messaging (Kafka/RabbitMQ), improving reliability, and modernizing legacy services.

I’m a Senior PHP Developer with 10+ years of experience building high-performance, scalable, and asynchronous backend systems across telecommunications, fintech, social media, digital marketing, SaaS, and e-commerce. I specialize in advanced PHP engineering—ReactPHP, AMPHP, WebSockets, event-driven architecture, distributed systems, SMPP integrations, long-running workers, and performance optimization.

My day-to-day strength is modern backend engineering with Laravel, Symfony, and Phalcon, delivered through scalable microservices and maintainable architectures. I design cloud-native infrastructure on AWS (ECS, Lambda, DynamoDB, S3, SQS), and I build reliable pipelines and messaging-driven systems using RabbitMQ, Kafka, and Redis—backed by profiling, monitoring, and debugging for high-throughput production environments. I also implement CI/CD with GitHub Actions and zero-downtime deployment strategies.

I’ve repeatedly modernized legacy systems into cleaner, scalable services, including refactoring work that improves reliability, throughput, and long-term maintainability. I’m especially energized by real-time and asynchronous systems, from WebSocket-based chat infrastructure to production-grade event-driven messaging.

Experience

Work history, roles, and key accomplishments

Current

Senior PHP Developer

Current

Adeva

Oct 2021 - Present (4 years 8 months)

Led backend development for large-scale telecommunications and social media platforms. Built high-performance asynchronous services and distributed microservices using PHP, ReactPHP, RabbitMQ, Redis, Kafka, SMPP integrations, and AWS, improving reliability and throughput through profiling, monitoring, and CI/CD deployments.

PHP ReactPHP RabbitMQ Redis Kafka AWS ECS AWS Lambda DynamoDB GitHub Actions

Senior PHP Developer

Pannovate

May 2021 - Oct 2021 (5 months)

Contributed to fintech platform development using Symfony and PostgreSQL. Improved backend maintainability and application stability while supporting scalable financial service integrations and optimizations.

PHP Symfony PostgreSQL Performance Optimization

Senior PHP Developer

Udrafter

Sep 2020 - Oct 2021 (1 year 1 month)

Engineered a scalable real-time communication service in PHP for a startup social networking platform. Built WebSocket-based chat infrastructure and long-running event-driven backend services using ReactPHP and ZeroMQ to achieve concurrent, low-latency messaging.

PHP Laravel ReactPHP WebSockets ZeroMQ IPC Event Driven Architecture Concurrency

Senior PHP Developer

TeleGo

Jan 2020 - Sep 2020 (8 months)

Modified Laravel internals to support stronger typing and rapid development. Modernized and refactored legacy applications with a focus on scalability and maintainability, while performing backend and infrastructure performance optimizations and maintaining reusable Composer packages.

PHP Laravel Composer DevOps Performance Optimization Refactoring Strong Typing Backend Infrastructure

Freelance PHP Developer

Upwork

Jan 2019 - Jan 2020 (1 year)

Developed an IMDb-style platform using Laravel with asynchronous web crawling and scraping. Implemented concurrent HTTP requests using Guzzle and built/customized Magento 2 e-commerce solutions.

PHP Laravel Guzzle Web Scraping Magento E commerce Development

PHP Developer

NanoInteractive

Jan 2018 - Oct 2018 (9 months)

Worked on enterprise digital marketing systems hosted on AWS. Developed event-driven backend services with Phalcon and integrated distributed data systems, participating in CI/CD automation, monitoring, testing, and infrastructure operations.

PHP Phalcon AWS RabbitMQ Redis Elasticsearch MongoDB Cassandra Jenkins Nagios

PHP Developer

Symbiotica

Jul 2017 - Dec 2017 (5 months)

Developed RESTful APIs using the Slim Framework and MongoDB. Delivered backend services for short-term API integration projects.

PHP MongoDB REST APIs API Integration Backend Development

PHP Full-Stack Developer

Comit Group

Dec 2015 - Jun 2017 (1 year 6 months)

Developed backend and full-stack solutions for e-commerce, dropshipping, and gambling platforms. Built features using Symfony and CodeIgniter and collaborated with frontend developers to deliver responsive, scalable applications.

PHP Symfony CodeIgniter MySQL JavaScript Full Stack Developer Dropshipping Gambling Platforms