02/16/2026 updated
100 % available
QA Engineer - Manual & Automation Testing Specialist
Ho Chi Minh City, Vietnam
Only remote
About me
QA Engineer (5+ yrs) in web products. Own end-to-end quality: exploratory, regression, release verification. Strong in API/backend with security mindset (auth boundaries, multi-tenant risks). Build C#/.NET automation and CI checks; use AI-assisted workflows.
.NET FrameworkControles de AccesoArtificial IntelligenceAutomationTest AutomationC Sharp (Programming Language)Continuous IntegrationData ValidationDevOpsExploratory TestingManual TestingNunitQuality ManagementRegression TestingSecurity Testing
Test Automation
Comprehensive automation expertise in C#/.NET, NUnit, RestSharp, Playwright, Selenium, and FlaUI for building robust automated testing frameworks
API Testing & Security
Advanced API testing capabilities with REST, GraphQL, Postman, including security-focused testing around authorization boundaries and session management
CI/CD & DevOps
Proficient implementation of continuous integration using Bitbucket Pipelines, GitLab CI, Jenkins, and Docker for streamlined testing workflows
Manual Testing Methodologies
Extensive experience in exploratory testing, regression testing, smoke testing, and boundary/negative test design
Security Testing
Specialized knowledge in access control testing, session/cookie vulnerabilities, IDOR patterns, and cross-tenant exposure detection
Database Management
Basic SQL skills for data validation and testing support
AI-Assisted Development
Experience with AI coding assistants like Codex/Copilot for accelerated development with strict validation practices
LLM Integration
Practical implementation of Large Language Model workflows for automation and structured data processing
Comprehensive automation expertise in C#/.NET, NUnit, RestSharp, Playwright, Selenium, and FlaUI for building robust automated testing frameworks
API Testing & Security
Advanced API testing capabilities with REST, GraphQL, Postman, including security-focused testing around authorization boundaries and session management
CI/CD & DevOps
Proficient implementation of continuous integration using Bitbucket Pipelines, GitLab CI, Jenkins, and Docker for streamlined testing workflows
Manual Testing Methodologies
Extensive experience in exploratory testing, regression testing, smoke testing, and boundary/negative test design
Security Testing
Specialized knowledge in access control testing, session/cookie vulnerabilities, IDOR patterns, and cross-tenant exposure detection
Database Management
Basic SQL skills for data validation and testing support
AI-Assisted Development
Experience with AI coding assistants like Codex/Copilot for accelerated development with strict validation practices
LLM Integration
Practical implementation of Large Language Model workflows for automation and structured data processing
Experience
Professional experience5 - 10 years
Freelancer since2019
Languages
EnglishFluentRussianNative speaker
Project history
Sole QA owner for marketplace and admin portal with focus on exploratory testing, regression, release checks, and triage verification. Built 400+ automated API tests and implemented CI-based regression suites.
Automated UI and workflow checks using C#, NUnit, Selenium, and FlaUI. Supported CI pipelines and improved legacy automation stability in high-risk areas.
Performed functional and regression testing, documented 200+ defects with clear reproduction steps, and contributed to early automation and test documentation practices.