Oleksandr Martynenko Email & Phone Number

I have a lot of experience mainly in a financial scopes: banking, telecom billing, payment systems, ticketing systems: in total of about 20 years of commercial work. I myself implemented a telecom project, it is working during the years without the crashes.My skills are focused on backend development (implementation from scratch or support existing monoliths, microservices, microframeworks, REST/RPC API), database development (design, development, performance optimization, I fluently work with SQL), working with legacy code (refactoring, profiling, performance optimization, fix especially heavy bugs).Main experiences: PHP 13 years (pure PHP, Laravel 5/7/8 - 4 years, Symfony 2/4/6 ~3 years, also Yii 1/2, Zend 1), MYSQL 11 years, ORACLE 6 years, POSTGRES 1 year; additional skills: Redis, RabbitMQ, Elasticsearch, AWS services, docker/docker-compose, JS/JQUERY/AJAX.Communication language skills: Ukrainian (native), English (upper intermediate), Russian (fluent).I’m linux user.