Вадим

Vadym Maidaniuk
Senior/Lead QA Engineer | Manual & Automation | AI &
Playwright Specialist

Contacts
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Kyiv, Ukraine

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Profile

Results-oriented Lead QA Engineer with 7+ years of experience in manual and automated
testing across AI-powered platforms, e-commerce, GIS, and WFM. Proven expertise in
building scalable Playwright-based automation frameworks (TypeScript/Python) from
scratch, leading QA strategies, and driving team efficiency for complex web products.

Specialized in Modern AI Quality: Hands-on experience with LLM testing, RAG
validation, prompt injection, guardrail testing, and agent-based QA workflows. Deeply
skilled in API and WebSocket validation, CI/CD integration, SQL, AWS, and observability
(Grafana).

Technical Knowledge
❏ Manual Testing: Web & Mobile (real devices, emulators, BrowserStack, LambdaTest)

❏ Automation: Playwright (TypeScript, Java, Python), Selenium (Java pet), Python (pet), UI
/ E2E / regression testing, test strategy, release validation
❏ API Testing: Postman, GraphQL Sandbox, WebSocket testing, Swagger, Mock servers
(WireMock etc.)

❏ Databases: PostgreSQL, MySQL (SQL queries), MS SQL, MongoDB

❏ CI/CD & Infra: GitHub Actions, GitLab CI/CD, ArgoCD, AWS S3, RabbitMQ, Grafana,
Linux basics, JMeter, k6

❏ Tooling: BrowserStack, LambdaTest, Jira, TestRail, Testiny, Git, VS Code, PyCharm,
Aqua, Figma

❏ AI Quality: LLM testing, RAG validation, prompt injection, guardrail testing, Azure Prompt
Shield, Langfuse, LangChain, AI agents for QA workflows

Professional Experience

Lead QA Engineer (AI, Interactive Presentations, Digital Avatars,
Lip-sync)

Roi4Cio | Jun 2025 – Present

●​ Lead QA for an AI-powered platform with CMS and Player modules, interactive
presentations, chat avatars, and third-party AI integrations.
●​ Design and scale Playwright-based automation for complex web, API, and end-to-end
scenarios.
●​ Test LLM-driven features, prompt behavior, prompt injection, Azure Prompt Shield, and
RAG flows, including knowledge base ingestion, retrieval relevance, and grounded
responses.
●​ Validate REST and WebSocket integrations, as well as external AI services such as D-ID,
HeyGen, and 11Labs.
●​ Use AI tools and agent-based workflows to accelerate bug investigation, test design, and
QA operations.​

Senior/Lead QA Engineer (E-commerce, Agricultural Web Shop)

Ferm | Feb 2024 – June 2025

●​ Built a Playwright TypeScript UI automation framework from scratch for an e-commerce
platform.
●​ Reduced regression cycle time by about 40% and improved release confidence through
test automation.
●​ Validated integrations with Google Analytics, Amplitude, and Meta Pixel.
●​ Performed backend testing with RabbitMQ, AWS S3, and SQL; supported CI/CD with
GitHub Actions and ArgoCD.
 ●​ Mentored QA team members and aligned test strategy with business goals.​

QA Engineer (WFM, GIS, Emergency Dispatch, Transport
Management)

RGC Digital | Apr 2021 – Jan 2024

●​ Performed REST API testing with Postman and Swagger for WFM, GIS, dispatch, and
transport management systems.
●​ Validated data with SQL queries and maintained test documentation, reports, and defect
tracking.
●​ Collaborated closely with development teams to resolve critical issues before release.​

QA Engineer (Video Surveillance System)

NDA | Nov 2019 – Jan 2021

●​ Performed functional, smoke, and regression testing for a video surveillance system.
●​ Created QA documentation and validated API behavior and error handling.​

Software Developer (Full Stack, Video Surveillance)

FF | Dec 2018 – Jul 2019

●​ Contributed to backend and frontend development using Python, Django, HTML, CSS,
jQuery, and Bootstrap.

Education
NTU “National transport university” (2008)

Specialist degree. Road machinery engineer.

Soft Skills
● Strong Communication Skills (Written & Verbal)

● Attention to Detail
 ● Critical Thinking & Problem Solving

● Collaboration & Teamwork

● Curiosity & Inquisitive Mindset

Language Skills
● English - intermediate

● Ukrainian - native

● Russian - native