Open to opportunities

Constantine B.

@bugfix666

Message

Backend developer specializing in high-traffic PHP systems and payment integration.

Russian Federation

Message

What I'm looking for

I’m looking for a team that values clean code and reliability at scale—owning backend services, payment integrations, and performance. I want deep engineering impact through testing, observability, and practical CI/CD.

I’m a backend developer with 12+ years building and maintaining web systems in PHP, focused on clean code, query optimization, payment integration, and handling high traffic. I’ve contributed to FinTech payment services and online entertainment platforms, always aiming for reliability at scale.

In recent roles, I’ve developed and scaled high-traffic backends with PHP (8.3) and Laravel, integrated third-party gaming provider aggregators, and implemented asynchronous payment processing with RabbitMQ. I also strengthen operational readiness through automated tests (PHPUnit), API documentation (Swagger/OpenAPI), and CI/CD pipelines (Docker, GitLab CI, GitHub Actions, Jenkins), plus monitoring stacks (Prometheus/Grafana, ELK) to speed up troubleshooting.

Experience

Work history, roles, and key accomplishments

Current

Senior PHP Developer

Current

Digital Entertainment Platform

Sep 2025 - Present (8 months)

Developed high-traffic backend services in PHP 8.3/Laravel 12 handling thousands of concurrent requests. Built third-party gaming provider integration via API gateway, configured RabbitMQ for async payment processing, and added Swagger/OpenAPI documentation and automated CI/CD deployments.

PHP 8+PostgreSQL Redis RabbitMQ OpenAPI PHPUnit Jenkins Docker

Senior PHP Developer

NoOnes P2P Cryptocurrency Platform

Jan 2024 - Sep 2025 (1 year 8 months)

Delivered key platform features for a multi-user P2P system and refactored modules to reduce incidents and improve code readability. Optimized SQL with caching in Redis and set up monitoring using Prometheus and Grafana.

Laravel PostgreSQL Redis Docker CI CD SQL Query Optimization Prometheus Grafana

Senior PHP Developer

High-Traffic Digital Entertainment Platform

Jul 2022 - Dec 2023 (1 year 5 months)

Scaled backend infrastructure to grow from ~1K to 10K+ RPS and integrated 5+ payment systems (cards, cryptocurrencies, high-risk wallets) with automatic transaction reconciliation. Implemented RabbitMQ event-driven payment processing, optimized PostgreSQL/MySQL queries with replication, and built an ELK/Grafana monitoring stack.

Golang Laravel MySQL PostgreSQL Redis RabbitMQ ELK Grafana

Senior PHP Developer

Feo Finance

Oct 2020 - Jul 2022 (1 year 9 months)

Built PHP 8/Laravel microservices for financial modeling using PostgreSQL and RabbitMQ, enabling asynchronous task processing at ~10K tasks/hour. Improved availability to 99.9% via PostgreSQL replication and reduced report generation time from 5 minutes to 30 seconds using ClickHouse and CQRS.

PHP 8+Laravel PostgreSQL Clickhouse Redis RabbitMQ Docker CQRS CI CD

Senior PHP Developer

2Veezy

May 2020 - Oct 2020 (5 months)

Developed an OpenRTB 2.5 real-time bidding system processing 1M+ bid requests per day and optimized analytical queries across ClickHouse and PostgreSQL. Contributed to code reviews and implemented static analysis to improve code quality.

Laravel PostgreSQL Redis Clickhouse Real Time Systems Query Optimization Code Review Static Analysis

Senior PHP Developer

Economic Games

Jan 2018 - May 2020 (2 years 4 months)

Built a transactional payments and accrual platform with an automated payment engine integrating 20+ PSPs behind a single API gateway. Automated transaction processing and financial reporting to reduce manual operations and eliminate calculation errors, and helped separate microservices from a monolith.

PHP 8+Laravel PostgreSQL Redis RabbitMQ Docker Linux API Gateway