Yerzhan Shaldybayev

Full-Stack Developer

Develop and maintain internal web applications across backend, frontend, database, and infrastructure layers. Design REST APIs and service integrations for internal workflows, partner systems, and operational reporting. Modernize legacy PHP modules and support a mixed architecture of monolith, microservices, and serverless components. Improve reliability and performance through SQL optimization, Redis caching, queue-based processing, and code refactoring. Own production environments on Linux virtual machines using Docker, Nginx, PHP-FPM, Bash automation, and monitoring practices. Strengthen application security through authentication, authorization, role-based access control, API protection, secure data handling, and vulnerability remediation. Review existing solutions, stabilize problematic areas of the system, fix production issues, and improve release quality. Stack: PHP, Laravel, Phalcon, Flight, JavaScript, React.js, Vue.js, React Native, PostgreSQL, MySQL, Redis, RabbitMQ, Docker, Linux, Bash, Swagger, Postman, Nginx.

PHP Developer

Developed and maintained PHP web applications supporting business processes and internal operations. Participated in system architecture design, requirements clarification, and business process modeling. Built APIs and third-party integrations for web and mobile application workflows. Optimized backend logic, MySQL queries, and database structure to improve maintainability and response times. Developed mobile application functionality with React Native and supported backend communication patterns. Stack: PHP, MySQL, Redis, WebSocket, React Native, Linux, Docker, Git.

Web Developer

Built and maintained web applications, web services, and automation tools for operational workflows. Integrated communication platforms including Twilio, WhatsApp, Telegram, Asterisk, and FreePBX. Implemented real-time and voice communication features using WebSocket and WebRTC. Refactored legacy PHP code, improved maintainability, optimized database interactions, and tested releases. Designed responsive user interfaces and adaptive layouts for internal and client-facing applications. Stack: PHP, MySQL, PostgreSQL, Redis, WebSocket, WebRTC, Linux, Git, HTML, CSS, JavaScript.

Programmer

Delivered websites, landing pages, catalogs, and e-commerce stores on CMS platforms and custom PHP solutions. Implemented HTML/CSS layouts, configured templates, built custom modules, and launched production sites. Maintained client websites, optimized code, fixed defects, and supported release testing. Stack: PHP, Drupal, WordPress, 1C-Bitrix, HTML5, CSS3, JavaScript, MySQL.