Denis Yurashku

Developed and migrated backend APIs from Perl (Mojolicious) to Python (Django/DRF), adding BDD/Cucumber regression testing. Improved test coverage to 95%, increased regression pass rate by 25%, and reduced API defect rate by 15%.

Modernised legacy Perl DSP processes with automated data validation and created Swagger specifications for APIs. Integrated ClickHouse to support releases and improved consistency, reducing request processing errors by 15% and timeouts by 10%.

Developed backend services for EPM+ CRM using Ruby, Python, and PHP, including refactoring Python services for performance. Redefined Redmine plugins (Ruby on Rails), cutting finance report generation time from 1 hour to 15 minutes, and reduced system downtime during EPM+ updates.

Developed Perl and Python services, configured Perl integrations, and built Python modules for performance optimization. Implemented Prometheus and Grafana monitoring, raising uptime to 99.5%, cutting task execution time by 20%, and reducing production incidents by 5%.

Developed and maintained company services in Perl, migrating a monolithic architecture to microservices. Optimized data processing with Python and refactored OTRS modules, improving system stability and throughput by 25% and reducing data synchronization delays by 15%.

Developed Perl (Catalyst) services for a ticketing system and integrated Apple Pay and Google Pay via REST APIs. Shortened the release cycle by 5% and reduced failed transactions by 10% through improved payment flows.

Maintained and enhanced a medical examination tracking system and promoted site services, refactoring the appointment service from PHP to Python (Flask). Improved page load speed by 10%, reduced request latency by 20%, and decreased production errors by 15% using optimizations and logging/error handling.

Administered databases and servers, automating routine tasks with bash while building UIs (jQuery/Bootstrap) and RESTful integrations. Reduced manual operations by 30% and improved backend response time by 25% through RESTful APIs (Perl/Mojolicious) and SQL optimization (PostgreSQL indexing).

Developed and maintained 20 Perl/MySQL websites and brought CMS 4Site modules into production. Increased new client inflow by 10% and improved CMS stability by 20% after implementing SOAP::Lite.

Developed and styled websites using Perl, MySQL, HTML, and JavaScript, creating custom Perl modules for multiple projects. Optimized MySQL queries and delivered 15+ projects, growing monthly clients from 2 to 5 by building the core system in Perl.

Incomplete higher education at the Faculty of Cybernetics, specialising in Computers, Complexes, Systems and Networks.