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Zakhar Vynnyk GitHub: github.com/Assidd

[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Kharkiv, Ukraine @Assigmenti

Profile

AI-Assisted Full-Stack Developer | Software Engineering Student, with hands-on experience developing and validating
web applications, REST APIs and database-backed functionality. Worked with Postman, MySQL, PostgreSQL and
MongoDB, and created automated tests using JUnit 5 and AssertJ. Comfortable with Docker/Docker Compose and
frequently use different AI coding agents for implementation, debugging, refactoring, code review, documentation and
test-idea generation. Proactive and ownership-driven: take responsibility for understanding expected behavior,
validating results and following issues through to completion.

Relevant Experience

Application Development & Quality Validation, Web / API / Databases / Automation
• Developed and validated web application functionality across frontend, backend and database layers, checking
authentication flows, forms, data handling, edge cases and frontend-backend interactions.
• Used Postman to send REST API requests and inspect status codes, headers, JSON payloads, authentication flows and
error responses.
• Worked with MySQL, PostgreSQL and MongoDB for CRUD operations, data inspection and consistency checks
between application behavior and stored data.
• Created automated tests with JUnit 5 and AssertJ, using assertion-based checks of expected behavior and regression-
oriented testing.
• Used Docker and Docker Compose for local development and testing: built and ran containers, worked with
Dockerfiles, ports, volumes, environment variables and logs.
• Frequently use different AI coding agents to explore solutions, implement features, debug issues, refactor and review
code, prepare documentation and generate test ideas; validate AI output before using it.

Skills

Manual Testing • Web Testing • Functional Testing • API Testing • UI Validation • Test Design •
Checklists • Test Cases • Defect Investigation • Postman • REST API • JUnit 5 • AssertJ • Java •
JavaScript • TypeScript • Python (basic) • SQL • MySQL • PostgreSQL • MongoDB • Docker •
Docker Compose • React • Node.js • Express • HTML • CSS • AI Coding Agents • ChatGPT •
Claude • Debugging • Code Review • Proactivity • Ownership

Languages

English — Intermediate (B1, actively improving toward B2) • Ukrainian — Native

Education

Software Engineering 2023 - 2027
National Technical University “Kharkiv Polytechnic Institute” Kharkiv, Ukraine
Specialty 121 - Software Engineering

Zakhar Vynnyk [open contact info](look above in the "contact info" section)