Віктор

Viktor Osypenko
Full-Stack TypeScript Developer | QA Automation Engineer
Kryvyi Rih, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)

Professional Summary
Full-Stack TypeScript Developer and QA Automation Engineer with commercial experience developing web
applications, automated tests, and modernizing existing systems.

Worked on legacy codebase refactoring, migration initiatives, TypeScript adoption, and implementation of frontend
and backend functionality.

Experienced in both software development and test automation, with the ability to contribute across multiple
stages of the development process.

Professional Experience
Ryzum — Full-Stack Developer & QA Automation Engineer
03.2025 – 09.2025, 12.2025 – Present
• Developed and maintained end-to-end test automation for a SaaS platform using Playwright, covering
approximately 100 user flows.
• Increased backend test coverage by implementing approximately 3,500 unit tests for a NestJS application.
• Migrated an existing Vue 3 application from JavaScript to TypeScript, improving maintainability and type safety.
• Refactored and optimized legacy frontend components, improving code quality and application performance.
• Independently migrated a commercial Vue 2 / Nuxt 2 application to Vue 3 and Vike, contributing to Lighthouse
score improvements of approximately 20 points on desktop and 30 points on mobile.
• Developed and maintained backend functionality, including API endpoint implementation and support of existing
services.
• Leveraged AI-assisted development workflows while maintaining full ownership of implementation and code
quality.
Fernir — Full-Stack Developer
09.2024 – 01.2025
• Developed and maintained frontend functionality using Next.js and React.
• Implemented new UI components and enhanced existing functionality based on product requirements.
• Investigated and resolved application issues, contributing to overall product stability and user experience.
• Developed backend API endpoints and supporting functionality for application features.
• Implemented Zapier integration workflows enabling synchronization of product creation, updates, and deletion
events with external services, including Google Workspace tools.
Walltech — QA Automation Engineer Intern
06.2024 – 09.2024
• Maintained and enhanced a large-scale Cypress-based automated test suite for a SaaS platform.
• Developed and updated end-to-end tests covering new and existing product functionality.
• Analyzed test failures, resolved automation issues, and improved test stability and maintainability.
• Created and maintained test documentation, test cases, and testing-related project artifacts.
• Reported, documented, and verified software defects in collaboration with the development team.

Core Technologies
Frontend: React, Next.js, Vue 3, Vike
Backend: Node.js, Express.js, NestJS
Testing: Playwright, Cypress, Jest

Additional Technologies & Tools
TypeScript, JavaScript, HTML, CSS, Tailwind CSS, Bootstrap, PostgreSQL, MySQL, TypeORM, Docker, Git,
CI/CD, npm
Additional Expertise
AI-assisted development, agent-based workflows, task orchestration, code analysis, refactoring, and testing.

Education
Master's Degree
Kryvyi Rih State Pedagogical University
2008 – 2013

Courses
ITVDN — JS Core, Web Core
QaTestLab — Web & Mobile Testing

Languages
Ukrainian — Native
Polish — B2
English — B1