Oleh Koren

Senior Performance QA Engineer @ Provectus

About

Performance testing specialist with 7 years of experience delivering reliable and scalable applications. I design and implement performance testing strategies from scratch, identify bottlenecks, and provide actionable insights that improve system stability and user experience. Skilled in JMeter, BlazeMeter, Grafana, InfluxDB, Jenkins/TeamCity, and cloud environments (AWS, Azure). Experienced with monitoring and observability tools like Kibana, Telegraf, and Zabbix, enabling proactive issue detection and performance optimization. I help teams ensure their applications handle real-world traffic efficiently, reduce downtime, and meet business performance goals.

Country

City

Ukraine

Industry

Information Technology & Services

Skill

BlazeMeter, BDD, Object-Oriented Programming (OOP), Elasticsearch, Oracle Database, Linux, New Relic, Swagger API, Sitespeed.io, Zabbix, Grafana, InfluxDB, Performance Analysis, Confluence, TeamCity, Jenkins, HTML5, CSS3, JavaScript, HTML

Experience

Senior Performance QA Engineer

Provectus

2023-7 - Present · 3 yrs 3 mos

Ukraine

- Performance test strategy development; - Orchestrating and overseeing performance testing initiatives; - Creating automated pipelines and build jobs in Jenkins; - Providing advisory services to other projects on performance testing strategies; - Designing and configuring Grafana dashboards and plugins creation; - Implementing performance test scripts using JMeter and Sitespeed.io;

Performance QA Engineer

Provectus

2021-11 - 2023-7 · 1 yr 9 mos

Kyiv City, Ukraine

- Regular communication with stakeholders; - Conducting, and moderating performance testing events; - Consulting other projects in performance testing direction; - Building a performance testing framework from scratch (Grafana, InfluxDB, Jenkins, JMeter, Sitespeed.io); - Building dashboards with Grafana (InfluxDB: InfluxQL, Flux); - Scripts implementation using JMeter and Sitespeed.io; - Pipelines and build jobs creation in Jenkins.