Senior Software Development Engineer in Test (SDET .NET+JS)

We are seeking a highly skilled Senior SDET to join our client’s Digital Ecommerce team and take ownership of advanced test automation initiatives across internal high-traffic platforms. The ideal candidate will be an expert in building scalable automation frameworks, validating complex distributed systems, and ensuring quality across web, API, mobile, and cloud-native solutions.This role requires a strong engineering mindset, hands-on automation expertise, and readiness to leverage AI tools and AI agents to accelerate testing, troubleshooting, and framework development..About The ClientOur client is a leading global IT solutions distributor, supporting partners in over 100 countries. They provide a wide range of hardware, software, cloud, and infrastructure solutions, helping technology partners scale and maximize the value of their investments. In the local market, they maintain a strong presence and continue to expand their portfolio across IT, AV, unified communications, and gaming solutions.What You’ll DoDesign, implement, and maintain modular, scalable automation frameworks using C#/.NET, MSTest, xUnit; or Python/JSDevelop end-to-end automated tests for web, API, and mobile applications using Selenium, Playwright, and Appium with parallel and headless executionAutomate API and microservices testing (Postman, RestAssured, Karate), including contract, negative, and fuzz testingTest SQL and NoSQL databases, ensuring data accuracy, integrity, and consistency across distributed systemsConduct load, stress, and scalability tests, apply chaos engineering, and collaborate on observability using Azure Monitor, Application Insights, Dynatrace, or ELKDeploy and manage test frameworks in cloud and container environments (AKS, Docker) and automate provisioning via Azure CLIIntegrate automated tests into CI/CD pipelines with quality gates, static analysis, parallel execution, and fail-fast mechanismsCollaborate with Development, DevOps, and QA teams, produce documentation, deliver training, and conduct peer code reviewsWhat You Bring8+ years in software testing; 3+ years in automation/SDET.Strong C#/.NET Core + exposure to JavaScript/Python.Expertise in Selenium/Cypress/Playwright/Appium.API testing tools: Postman, RestSharp, Karate.Cloud & DevOps experience: Azure, Docker, Kubernetes, Azure DevOps.SQL/NoSQL testing experience.AI-ready: ability to use LLM tools and implement AI agents in workflows.English levelAdvanced🌍 Location: Bulgaria, Lithuania, Poland, Romania, Uzbekistan📩 Ready to Join?We look forward to receiving your application and welcoming you to our team!