Stack: PHP 7.4, Laravel 5.8, JS, VueJS, MySQL, Go, Echo, MongoDB, gRPC,React Native, Redis, RabbitMQ, Google Cloud, Redmine.

- Developed using TDD and implemented an API service into a service system consisting of a Laravel-based CRM, a website and a mobile application.

- Developed and implemented logging and system fault tolerance mechanisms.

Stack: Go, Echo, PostgreSQL, Cassandra, gRPC, Symfony 5->6, PHP 8, TS/JS,SvelteJS, Redis, Docker, K8s, Terraform, Nginx, Grafana, Prometheus, Apache Kafka, AWS, CI/CD, GitLab.
- Developed, tested and implemented warehouse service on an e-commerce platform.
- Implemented a load balancing solution.
- Migrated Symphony from version 5 to version 6.

Stack: PHP 7.2/8, JS, MySQL, Joomla, Docker, Phalcon, ElasticSearch+Logstash+Kibana,Nginx,PostgreSQL, Doctrine ORM, Swoole,RabbitMQ, Docker, K8s, JS, Nginx, CI/CD, GitLab, Jira.

- Developed scripts for updating indicators in the Wildberries DB.

- Implemented ELK stack on Joomla: setting, deployment, configuration,configured security, profiling and system logging to analyze requests.

- Fixed bugs in the functionality of the medical service.

- Refactored and optimized legacy game system code.

- Optimized of legacy CRM system code, refactored the code, fixed bug.

- Developed and implemented a web client in a landing page for an automated online casino system.

Stack: PHP 5.5-7.4, CMS WP/Joomla/ModX/OpenCart, Nginx, Apache, Zabbix,Swoole, Yii2, Symfony 5, REST, NodeJS, ExpressJS, SocketIO, MySQL,MongoDB, Git, JS/TS, HTML 5, CSS3, Bootstrap, Angular 1.x, GulpJS,RabbitMQ, RPC, REST, MemCached, Docker, Redmine.

- Developed a CRM system from scratch based on Symphony 5. Implemented a chat service for CRM based on NodeJS, ExpressJS, SocketIO, MongoDB,RabbitMQ and RPC.

- Developed from scratch, designed and implemented scalable services foridentifying, extraction, analysis, search and processing of information for onlinelearning systems and audit of scientific publications.

- Developed and supported websites using CMS: blogs, landing pages, onlinestores.

- Developed and maintained documentation at all stages of development ofcomplex projects.

- Team management and negotiations with clients.

Stack: PHP 7.2, MySQL, Propel 2, Yii2, JS, Angular 1.4, NodeJS, GulpJS,Docker, K8s, AWS, s3, REST, MemCached, Nginx, Grafana, Prometheus, Bitbucket, Redmine.

Developed and implemented modules for:
- statistical data and reporting of advertising campaigns;
- new advertising campaigns block;
- mini-game type of campaign.

- Optimized REST API performance for critical requests between the service and the advertising campaign endpoint.

- Implementation of documentation on the logic of the main server modules.

Stack: PHP 7, Yii2, MySQL, VueJS, JS, MemCached, Jira, Nginx.

- Eliminated system bottlenecks: interface errors, fixed security errors,query optimization, mail server setup.

- Designed the software product architecture in accordance with Principles of KISS.

As a result: the application architecture has been improved, some modules have been systematized into a single structure, all known bugs and errors have been fixed, memory consumption has been reduced by 25%.