Olga

Olga Diachok
QA Engineer

Manual Testing | Web & Desktop | API Testing & Automation

📞 [відкрити контакти](див. вище в блоці «контактна інформація») ✉ [відкрити контакти](див. вище в блоці «контактна інформація») @Olia_Diachok 📍 Chernihiv, Ukraine

PROFESSIONAL SUMMARY
QA Engineer with 9+ years of hands-on experience testing web and Windows desktop applications,
distributed enterprise systems, and integrations throughout the software development lifecycle.

Strong background in functional, system, integration, regression, exploratory, and end-to-end testing
across UI, APIs, databases, and backend components. Experienced in requirements analysis, test
design, risk-based testing, defect investigation, release validation, and production issue
troubleshooting.

Hands-on experience with REST API testing and automation using Postman, JavaScript, and
Playwright/TypeScript, with basic UI automation experience using Playwright/C# and FlaUI.
Proficient in technical investigation using Chrome DevTools, application logs, and SQL Server
Management Studio. Experienced in Microsoft Office and Document Management System
integrations, Windows and browser compatibility, and performance testing with Apache JMeter and
an internal tool.

Uses AI tools to support test design, test analysis, and automation development. Works
independently, takes ownership of QA activities, and supports onboarding, mentoring, and
knowledge sharing across teams.

CORE SKILLS
● Testing: Functional, system, integration, end-to-end, regression, smoke, sanity, exploratory,
ad-hoc, positive/negative, and edge-case testing
● Requirements & Test Design: Requirements and acceptance criteria analysis, test
scenarios and cases, test design techniques, risk assessment, test coverage analysis
● Technical QA: Web and desktop testing, REST APIs, backend, databases, system
integrations, customer-specific configurations
● Automation: Postman/JavaScript, Playwright/TypeScript, basic Playwright/C# and FlaUI
● Defect & Release Management: Defect investigation, fix verification, regression planning,
release validation, hotfix verification, customer issue investigation
● Specialized Testing: Access control, tenant isolation, compatibility, accessibility, usability,
installation, performance and load testing
● Tools: Jira, Xray, Zephyr, Confluence, Postman, Swagger/OpenAPI, SQL Server
Management Studio, Chrome DevTools, Git, Visual Studio, Apache JMeter
● AI-Assisted QA: Cursor AI, Devin, Copilot, ChatGPT

PROFESSIONAL EXPERIENCE
Litera Microsystems | 2016–2026

Senior QA Engineer | 2018–2026
Junior to Mid-level QA Engineer | 2016–2018

Manual, Functional & End-to-End Testing

● Tested web and Windows desktop applications throughout the software development
lifecycle, including distributed enterprise applications and systems integrated with external
services.
● Performed functional, system, integration, contract acceptance, regression, smoke, sanity,
exploratory, ad-hoc, and end-to-end testing.
● Designed and executed positive, negative, invalid-input, missing-data, boundary, and
unexpected-behavior scenarios.
● Verified UI behavior, validation rules, error handling, required fields, and user feedback
across environments, configurations, browsers, operating systems, roles, and permissions.
● Tested end-to-end business workflows across frontend, backend, APIs, databases, and
integrated systems.
● Performed installation, uninstallation, patch, upgrade, and configuration testing for desktop
applications.

Requirements Analysis & Test Design

● Analyzed requirements, acceptance criteria, product and technical documentation to define
test scope and identify incomplete, conflicting, or unclear expectations.
● Identified missing scenarios, raised clarification questions, and discussed expected behavior
with Product Owners, Project Managers, and developers.
● Applied test design techniques and risk-based analysis to identify edge cases, assess
change impact, and prioritize test coverage.
● Conducted structured exploratory testing when documentation was incomplete; investigated
unexpected user actions and inconsistent behavior, then converted relevant findings into
repeatable test cases.
● Defined performance scenarios based on product requirements and risks, evaluating results
against expected behavior.

Defect Investigation & Production Support

● Reproduced and investigated defects across application layers, environments,
configurations, user roles, permissions, and platforms.
● Used Chrome DevTools, API requests and responses, application logs, and database
queries to identify root causes and distinguish product defects from environment-specific or
customer-side issues.
● Created detailed defect reports with reproduction steps, expected and actual results, and
relevant screenshots, recordings, logs, versions, and configuration details.
● Verified fixes against original reproduction steps and expanded testing to related functionality,
negative scenarios, and additional environments when justified by risk.
● Investigated customer-reported and production issues using customer-provided documents,
data, and configurations; collaborated with Support to collect missing information and
provided developers with technical findings and reproducible scenarios.

Regression, Release & Risk-Based Testing

● Planned and executed regression testing for major releases, prioritizing coverage according
to product changes, technical dependencies, and potential impact.
● Adjusted regression scope for hotfixes and isolated changes to balance risk coverage with
testing efficiency.
● Maintained regression suites, identified outdated or duplicate test cases, and used existing
automated coverage to reduce unnecessary manual duplication.
● Validated release candidates, completed features, defect fixes, and available automated test
results; identified release blockers, communicated quality risks, and participated in release
and hotfix discussions.

API Testing & Automation

● Tested REST APIs using Postman, covering GET, POST, PUT, and DELETE requests,
positive and negative scenarios, parameters, headers, request bodies, HTTP status codes,
JSON responses, and response schemas.
● Used Swagger/OpenAPI specifications to design tests and verify actual behavior against
documented expectations.
● Tested authentication, authorization, token-based access control, token expiration, and API
validation rules; used API requests to prepare test data for functional testing.
● Automated API scenarios in Postman using JavaScript assertions, variables, environments,
request chaining, dynamic data, and organized test collections.
● Developed and maintained API tests within an existing Playwright/TypeScript automation
framework, using reusable helpers, Page Object Model principles, test suites, and existing
project conventions.
● Executed and debugged automated tests, maintained scripts after product changes, and
contributed automation changes through Git, pull/merge requests, and code reviews.
● Performed basic UI automation using Playwright/C# and FlaUI within an existing framework,
using Visual Studio.
● Used AI tools to develop, refine, review, and maintain API and automation scripts.

Database & Technical Investigation

● Used SQL Server Management Studio to validate application data, investigate defects, verify
create/update/delete operations, and manage test data.
● Identified relevant tables and verified stored values, required fields, application settings, and
tenant-related data.
● Used SELECT, WHERE, JOIN, ORDER BY, and GROUP BY queries; added, modified, and
cleaned up test data when required.
● Used Chrome DevTools to inspect page structure, CSS styles, browser-console errors,
network requests, parameters, and server responses; applied basic HTML/CSS knowledge
to investigate frontend issues.

Security, Compatibility, UI & Accessibility

● Tested authentication, login/logout, invalid credentials, roles, permissions, authorization,
tenant isolation, and session/token expiration across UI and API.
● Verified that users could not access unauthorized functionality or data and checked that
sensitive credentials were not stored in readable form in configuration files.
● Verified UI implementation against Figma designs and specifications, including layout, visual
behavior, labels, instructions, error messages, and destructive-action safeguards.

● Performed accessibility checks covering keyboard navigation, focus order, visible focus
states, and accessible labels/names; identified usability and UX concerns and discussed
them with relevant stakeholders.
● Performed cross-browser testing with Chrome, Edge, and Firefox, as well as
Windows/browser combinations, screen resolutions, zoom levels, and responsive layouts.
● Tested Windows desktop applications across Windows 7, 8, 10, and 11; Microsoft Office
integrations with Word, Excel, and PowerPoint; and integrations with administrative
interfaces and Document Management Systems.
● Tested supported Office versions, network/offline scenarios, customer-specific configurations,
and problematic, corrupted, or damaged documents; investigated application errors, crashes,
and compatibility issues.

Performance & Load Testing

● Performed load, stress, spike, and concurrency testing using Apache JMeter and an internal
performance-testing tool.
● Generated workloads and analyzed response times, throughput, errors, and server stability.
● Evaluated performance results against expected product behavior and discussed findings
with developers and Product Owners.

Test Management, Documentation & CI/CD

● Created and maintained test cases, test plans, test suites, test executions, regression
coverage, and QA documentation using Jira, Xray, Zephyr, and Confluence.
● Linked test cases to requirements, stories, and defects; tracked testing progress, release
readiness, known issues, and workarounds.
● Organized and archived test cases according to feature scope, priorities, and release
requirements; contributed to acceptance criteria clarification and updates where appropriate.
● Worked with Git branches, commits, pushes, pull/merge requests, code reviews, and merge
conflict resolution; reviewed AI-assisted code before committing.
● Executed automated suites through existing CI/CD pipelines, monitored pipeline logs and
test results, and investigated failures to distinguish product defects from automation,
environment, or infrastructure issues.

Agile Collaboration, Mentoring & Knowledge Sharing

● Participated in backlog refinement, sprint planning, daily stand-ups, retrospectives, product
demos, requirements discussions, and release planning.
● Reviewed tickets for testability, contributed to story-point estimation and QA capacity
assessment, and communicated testing progress, dependencies, blockers, and risks.
● Collaborated with Product Owners, Project Managers, developers, QA leadership, and
Support to clarify requirements, coordinate testing, and resolve issues.
● Supported onboarding and mentoring of QA engineers, explained product workflows and
team practices, reviewed test cases, provided test-coverage feedback, and assisted with
defect investigation and automation questions.
● Helped onboard a new Tech Lead by sharing product knowledge, QA processes, workflows,
and product-specific testing context.

KEY ACHIEVEMENTS
● Helped increase regression automation coverage to approximately 70% across existing
test suites through API automation and contributions to existing automation frameworks.

● Identified critical edge cases, regression defects, and product risks through requirements
analysis, exploratory testing, and release validation.
● Investigated complex defects spanning frontend, backend, APIs, databases, integrations,
and customer-specific environments.
● Improved testing efficiency through risk-based test selection, focused regression coverage,
structured test scenarios, and reusable automation components.
● Supported team effectiveness through AI-assisted QA activities, knowledge sharing, and
informal mentoring.

TECHNICAL SKILLS
Testing & Test Design: Functional, system, integration, regression, smoke, sanity, exploratory,
ad-hoc, end-to-end, installation, configuration, compatibility, positive/negative and edge-case
testing; Equivalence Partitioning, Boundary Value Analysis, Decision Tables, State Transition
Testing, Error Guessing, Risk-Based Testing.

API & Automation: REST, Postman, JavaScript assertions, Swagger/OpenAPI, HTTP methods,
request/response validation, JSON, schemas, authentication, authorization, variables,
environments, request chaining, dynamic test data, Playwright, TypeScript, JavaScript, C#, FlaUI,
Page Object Model, locators, assertions, waits, reusable helpers, test suites, basic automation
debugging.

Database & Investigation: Microsoft SQL Server Management Studio (SSMS), SQL, SELECT,
WHERE, JOIN, ORDER BY, GROUP BY, database validation, test data management, Chrome
DevTools (Elements, Computed, Console, Network), basic HTML/CSS, application logs, browser
and API investigation.

Performance & Security: Apache JMeter, internal performance-testing tool,
load/stress/spike/concurrency testing, response-time and throughput analysis, error analysis, server
stability, authentication, authorization, access control, roles, permissions, tenant isolation,
session/token expiration, input validation, sensitive-data validation.

UI & Compatibility: Figma, visual validation, layout testing, keyboard navigation, focus order,
accessible labels, usability testing, UX evaluation, Chrome, Edge, Firefox, Windows 7/8/10/11,
Microsoft Office, Word, Excel, PowerPoint, Document Management Systems, installation, patches,
upgrades, offline/network scenarios.

Test Management & Delivery: Jira, Xray, Zephyr, Confluence, test cases, test plans, test suites,
test executions, defect tracking, test coverage, release tracking, QA reporting, known issues and
workarounds, Git, branches, commits, pull/merge requests, code reviews, merge conflict resolution,
CI/CD pipelines, pipeline logs, automated test results, test failure investigation.

AI-Assisted QA: Cursor AI, Devin, Copilot, ChatGPT, AI-assisted test design and test-case
generation, test analysis, automation development, code refinement, review, and validation.

Methodologies: Agile, Scrum, risk-based testing, exploratory testing.

CERTIFICATION
Devin Foundations Badge — Cognition