Sebastian Seichei-Silaghi
Sebastian Seichei-Silaghi

Senior QA Automation Engineer / SDET

Open to offers · Member since 9 Sep 2026
Message
Location
Cluj-Floresti, Romania
Desired salary
Unspecified
Work preference
Remote Only / Contract
Experience level
Senior

About

Professional summary

I am a Senior QA Automation Engineer and SDET with more than 14 years of experience building quality strategies, scalable automation frameworks, and release-readiness processes for cloud-based, regulated, and data-sensitive products.

I specialize in UI, API, integration, regression, cross-browser, performance, and backend validation. My primary technical strengths include Playwright, TypeScript, JavaScript, C#, Selenium, REST APIs, SQL, and test architecture.

I have built automation frameworks from scratch and integrated them into CI/CD pipelines using GitHub Actions, CircleCI, Azure DevOps, Jenkins, and TeamCity. I focus on reliable quality gates, maintainable test suites, observability, and risk-based testing.

I also use AI-assisted engineering practices with Claude Code, creating reusable QA agents and skills for test generation, debugging, refactoring, code review, and quality analysis. I apply careful validation practices for AI and LLM-related outputs, including deterministic assertions, tolerance-ba

Skills

26 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Application Utilities

Collaboration

Languages & Frameworks

Libraries

Mobile

Monitoring

Experience

Career history

Senior QA Automation Engineer Castor

I define and execute test strategies for a cloud-based clinical research platform across UI, API, integration, regression, cross-browser, and pre-release validation. I design end-to-end scenarios for critical user journeys, API contracts, data validation, regression risks, and visual regression testing.

I built and maintain scalable UI and API automation frameworks using Playwright, TestCafe, TypeScript, and JavaScript. I integrate tests with GitHub Actions and CircleCI, use LambdaTest, Argos, DataDog, Jira, and TestRail for quality visibility, and apply Claude Code and reusable QA agents to support testing, debugging, refactoring, and AI-quality evaluation.

Quality Assurance Consultant FinClusive Capital

I led the creation of a custom automation framework supporting frontend, backend, and compliance-focused testing for a FinTech compliance platform. I defined QA strategy across application layers, environments, risk-based regression coverage, and production deployment readiness.

I performed API and backend validation using Postman, HttpClient, SQL, and Azure Service Bus integrations. I also estimated and coordinated testing activities covering environment readiness, execution, release validation, defect closure, and stakeholder alignment.

QA Lead Ve Interactive

I led QA activities across multiple e-commerce technology projects, coordinating priorities, test planning, execution, regression coverage, and mentoring. I supported projects involving video, customer prospecting, customer service, and email marketing.

I designed and maintained UI automation frameworks using C#, SpecFlow, Selenium WebDriver, WebdriverIO, and JavaScript. I also performed API testing with Postman and supported integration validation and CI/CD adoption across services.

Senior QA Automation Engineer Darwin

I designed and maintained UI automation for a global benefits management and employee engagement platform using C#, SpecFlow, and Selenium WebDriver. I managed regression testing and defect verification to support stable product releases.

I contributed to CI/CD processes and maintained test documentation and defect tracking. My work also included API testing with Postman and SQL-based validation.

QA Automation Engineer UMT Software

I designed API service automation using C# and NUnit for an enterprise financial and project portfolio management product. I maintained SharePoint and Project Server test environments and supported functional validation across the platform.

I developed PowerShell and STSADM automation for deployments and configuration. I also performed performance, load, and stress testing using JMeter and worked with Selenium WebDriver, SQL, TFS, Postman, and Fiddler.

Education

Learning history

Technical University UTCN

Master of Communication and Information Technology, Communication and Information Technology

Master's degree completed in Cluj-Napoca, Romania.

Technical University UTCN

Bachelor's Degree, Electronics, Telecommunications and Information Technology

Bachelor's degree completed in Cluj-Napoca, Romania.

Microsoft

Foundational C# with Microsoft Developer Certification, C#

Foundational C# certification.

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