Денис

DENYS KOZYR
Senior QA Engineer | iGaming, Payments, Web & Mobile Quality
[open contact info](look above in the "contact info" section) • [open contact info](look above in the "contact info" section) • Ukraine
LinkedIn: [open contact info](look above in the "contact info" section)

CORE STRENGTHS PROFESSIONAL SUMMARY
• End-to-end testing across QA Engineer with 6+ years of experience across iGaming, logistics,
player, operator, back-office, healthcare, and insurance. Strong in end-to-end validation, API testing,
and promotional flows
database checks, log analysis, deployment verification, and release
• API validation with Postman
and Swagger; defect isolation support. Hands-on with operators, bonus mechanics, affiliate flows, and
via logs and database checks payment services including bank transfers and cryptocurrency
• Release confidence through transactions.
smoke, regression,
KEY FIT
deployment verification, and
post-release validation • Strong iGaming exposure across operators, bonus logic, affiliate programs, and
TOOLS & PLATFORMS payment flows.
• Practical API, logs, and database coverage that improves defect isolation and
JIRA, Confluence, TestRail,
Zephyr, GitLab, Postman, release confidence.
Swagger, Figma, DBeaver, • Comfortable with AI tools to accelerate analysis, documentation, and repetitive
BrowserStack QA workflows.
LOGS, DATA & RELEASES RECENT EXPERIENCE
Datadog, Grafana, Kibana,
TrueGroup — QA Engineer | Dec 2025 - Present
Mouseflow, SQL, database
validation, deployment • Perform end-to-end testing of web and mobile iGaming products,
verification, release support validating critical user journeys, integrations, and release stability.
AI-ENABLED QA • Work with casino operators to verify configurations, game availability,
ChatGPT, Codex, JamAI, Manus content setup, and production-sensitive scenarios.
for faster test design, scenario • Validate bonus mechanics, affiliate flows, and user-facing calculations to
generation, bug analysis, ensure correct business behavior.
workflow automation, and AI-
• Test payment services and transaction flows, including bank transfers and
assisted QA automation support.
cryptocurrency operations, checking rules, statuses, limits, and user-
DOMAIN EXPERTISE
facing behavior.
iGaming, casino operators, • Test APIs and data consistency using Postman, Swagger, logs, and database
bonus mechanics, affiliate
checks; collaborate closely with developers and product teams.
programs, payment services,
bank transfers, cryptocurrency • Execute functional, regression, smoke, and release validation, including
flows deployment checks and post-release monitoring for high-risk features.
LANGUAGES
Ukrainian - Fluent
Russian - Fluent
English - Intermediate (B1-B2)
EXPERIENCE

SPRIBE — QA Engineer | May 2022 - Nov 2025
• Performed comprehensive testing of web and mobile applications for global gambling operators on Android and
iOS platforms, ensuring stable release quality.
• Created and maintained test documentation, validated business-critical flows, and contributed to continuous
product quality improvement.
• Conducted functional, regression, usability, and API-related testing, actively supporting reliable feature delivery
and product improvements.
• Took ownership of complex and critical areas, using logs, analytics, and cross-team collaboration to resolve
issues and improve release readiness.
Selected impact
• Increased test coverage by 30% through systematic documentation and scenario expansion.
• Reduced production bugs by 20% via early defect detection and proactive collaboration with developers.
• Improved stability of fraud management dashboards, ensuring release readiness without critical incidents.

NDA Company — QA Engineer, Team Lead | Nov 2020 - May 2022
• Worked on a healthcare project for a large hospital, developing electronic portals for patients and doctors,
including scheduling, notifications, and treatment management.
• Contributed to an insurance project for a major U.S. company, enabling office managers to process claims, track
approvals, and view customer statistics.
• Conducted testing of web and mobile applications (Android, iOS), created and maintained test documentation,
and supported product improvements.
• Mentored and trained junior team members, facilitated knowledge sharing, reviewed solutions, and supported
onboarding.
• As a group lead, guided new team members and participated in performance reviews.
Selected impact
• Decreased bug leakage by 15% by introducing regression checklists and strengthening QA processes.
• Accelerated onboarding of new testers, reducing ramp-up time by 25% through mentoring.
• Improved insurance claim processing efficiency by 20% through workflow validation and testing optimization.

Driveroo — QA Engineer | May 2019 - Nov 2020
• Tested web and mobile applications (Android, iOS) for a logistics and courier platform, tracking vehicle status
and technical condition.
• Developed and maintained test documentation, conducting smoke, regression, and usability testing.
• Suggested product improvements and contributed practical ideas to enhance functionality and usability.
• Mentored junior team members, supporting knowledge transfer and faster ramp-up.
Selected impact
• Cut regression testing time by 25% by optimizing test cases and introducing structured smoke tests.
• Increased platform stability by proposing and implementing usability improvements.
• Raised team efficiency by coaching new QA engineers, reducing initial error rate by 20%.
EDUCATION
Master of Law — Kharkiv National University of Internal Affairs | 2011 - 2017

References and detailed project context available on request.