Олександр

Oleksandr Yolkin
Senior QA Engineer

Kyiv, Ukraine
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Summary

Experienced QA Engineer with 10+ years of extensive experience in testing customized
enterprise solutions based on on-premises SaaS platforms. Hands-on experience testing
mobile apps on iOS, Android, and Windows platforms, including release and update
processes. Proven ability to work in dynamic, multi-environment setups, supporting complex
deployments and client-specific configurations. Proficient in regression, release, and
infrastructure testing with a solid background in radio electronics and production. Strong
understanding of QA processes, test case creation, debugging, and issue tracking, with a
strong foundation in embedded and hardware-integrated systems testing, including end-to-
end quality control of electronic devices and IoT-like environments.

Experience

Company: HitZone
Duration: August 2023 – November 2024
Role: Senior QA Engineer
Responsibilities:

● Configured and tested backend QA infrastructure for mobile game applications
using Google Cloud Platform (GCP)
● Developed and executed structured release and hotfix deployment procedures
● Used monitoring and debugging tools (Sentry, Firebase Crashlytics, Kibana) for
issue analysis and validation
● Created and maintained detailed manual test cases and scenarios
● Performed API-level testing and localization tool validation
● Conducted integration testing across frontend and backend components
● Executed mobile application testing on iOS and Android devices (functional,
regression, localization)
● Wrote technical specifications and QA documentation for automation engineers
● Contributed to C#-based automated test creation and maintenance
Technologies: Git, TeamCity, Google Console, GCP tools, Sentry, Firebase, Kibana, Jira,
Confluence, Miro, TestFlight, Testrail, Android Studio, Rider, Lens

Metodologies: black and white box testing

Company: Form.com
Duration: February 2019 – August 2023
Role: QA Engineer
Responsibilities:
● Tested infrastructure changes initiated by the Production team
● Validated general updates in core code, including database separation logic
● Conducted regression testing prior to releases
● Prepared detailed change logs and technical instructions for release cycles
● Created and implemented release procedures
● Maintained and updated manual test suites
● Drafted technical tasks and specifications for automation QA engineers

Technologies: JMeter, Java (debug level), MySQL, PostgreSQL, MSSQL, Oracle, SoapUI,
Postman, Fiddler, Grafana, Kibana, MultiPutty, TestLink, TeamCity, Jira, IntelliJ IDEA

Metodologies: black and white box testing

Company: WorldApp
Duration: January 2012 – January 2019
Role: Technical Support QA Analyst
Responsibilities:

● Analyzed end-user issues escalated beyond the help desk across four applications:
web app and mobile (iOS, Android, Windows offline)
● Classified issues as software bugs, product management bugs, user errors, or
training gaps
● Delivered workaround solutions to mitigate impact while permanent fixes were
being developed
● Collaborated with developers and product managers on resolution implementation
● Performed validation testing of fixes and conducted full regression testing when
needed
● Deployed hotfixes to the production environment on a bi-weekly basis
● Tested mobile applications (iOS, Android) for functionality, performance, and
stability
● Released, configured, and updated mobile apps on App Store and Google Play

Technologies: TeamCity, TestLink, MultiPutty, Jira, Java (debug level), Kibana, IntelliJ IDEA,
JMeter, Fiddler, MSSQL, MySQL, PostgreSQL, Oracle, Grafana, Postman, SoapUI
Company: Leo Group

Duration: September 2008 – December 2011
Role: Lead Production Engineer

Responsibilities:

● Led a cross-functional engineering team, recruited staff, and defined production
goals
● Oversaw full-cycle quality control of hardware and software components, including
embedded systems (payment terminals)
● Installed, configured, and validated proprietary software on custom hardware
platforms
● Managed product certification processes and ensured regulatory compliance
● Handled procurement, warehouse logistics, and inventory management
● Provided post-production support, diagnostics, and servicing of embedded devices
● Conducted hardware diagnostics using multimeters, oscilloscopes, and other
electronic tools

Company: Smart Games
Duration: November 2006 – September 2008
Role: Quality Engineer
Responsibilities:

● Conducted comprehensive quality control of embedded hardware products before
shipment
● Tested custom-made metal housing components, hardware parts, and installed
software
● Ensured full system functionality of assembled slot machines and interactive
terminals
● Participated in product certification processes, including documentation and
compliance checks
● Collaborated with hardware and software teams to troubleshoot and resolve
integration issues

Company: Balaton
Duration: November 2002 – November 2006
Role: Service Engineer
Responsibilities:

● Repaired electronic components such as monitors, motherboards, and bill
acceptors
● Maintained and troubleshot local networks for JackPot systems based on RS232
protocol
 ● Serviced electrical and mechanical parts of slot machines and embedded gaming
devices
● Performed diagnostics using soldering equipment, multimeters, and oscilloscopes
● Provided on-site technical support and long-term servicing of deployed systems

Education

Technological Institute of East Ukraine Volodymyr Dahl National University
Computer Systems and Network Engineer

Technological College
Radio Mechanic

Technical Skills

Languages: Java, C#
Databases: MySQL, PostgreSQL, MSSQL, Oracle
Testing: JMeter, SoapUI, Postman, TestLink, TestRail
DevOps & Tools: Git, GitLab (CI/CD), TeamCity, GCP, Sentry, Firebase, Kibana, Grafana, Jira,
Confluence, Miro, Android Studio, Rider, Lens
Concepts: Regression Testing, Release Management, Infrastructure Testing, Mobile/Web
Testing
Hardware & Embedded:
Embedded systems testing, hardware integration QA, device-level diagnostics, soldering,
oscilloscope, multimeter, firmware installation and validation

Languages

English – Upper intermediate
Ukrainian – Native
Russian – Fluent