Develop and enhance a Laravel-based Canadian platform for the sale and rental of storage units and portable containers, enabling customers to arrange transportation across supported provinces throughout Canada. Implemented location-based service discovery that identifies users' locations and presents the most relevant storage, rental, and transportation options, increasing booking conversion by 55%. Maintain and improve legacy functionality — including discounts, promotional codes, booking calendars, and related workflows — while delivering new product features. Build API clients for storage operations and integrate the platform with Zoho, Google APIs, Google Ads audiences, SEO tools, and marketing analytics and tracking systems, reducing manual reporting time by 30%. Developed booking payment logic, including price calculation and payment gateway integration. Optimized database performance by adding indexes, removing N+1 and slow queries, and caching frequently requested data in Redis. Moved long-running operations to Laravel queues and scheduled background jobs. Designed the architecture of new modules, reviewed teammates' code, and mentored junior developers. Took part in upgrading the platform from PHP 7.4 to 8.2 with the corresponding Laravel upgrades, and covered business-critical logic with automated tests.

Developed and maintained monolithic and microservices backend systems using PHP, Laravel, and Symfony. Expanded reusable Laravel and Yii2 packages, reducing code duplication and improving consistency across multiple projects. Built real-time messaging via WebSockets and integrated WhatsApp (including voice calls over SIP), Messenger, Telegram, and HelpCrunch through Meta and third-party APIs. Designed secure payment workflows using LiqPay and NOWPayments, including transaction processing, webhook handling, and callback management. Improved MySQL and PostgreSQL performance through query optimization and indexing, and moved heavy tasks to asynchronous processing with RabbitMQ and Redis caching, increasing throughput by 20%. Designed and implemented RESTful and SOAP APIs (JSON, XML) for third-party integrations. Integrated OpenAI, Anthropic, Gemini, and other LLM APIs with function calling and knowledge-base workflows; built AI agents and MCP-based automation using Claude and OpenCode. Refactored legacy PHP applications, improving maintainability and reducing technical debt.

Built and maintained a Laravel e-commerce platform for a Ukrainian bedding retailer, supporting core business operations and online order processing. Integrated the platform with CRM systems and the Nova Poshta API, streamlining delivery management and reducing manual order-processing tasks. Applied business logic for pricing calculations, inventory tracking, warehouse management, and related ecommerce workflows.