> Markdown version of [/jobs/ext/3669676-mid-level-performance-engineer](https://www.wearedevelopers.com/jobs/ext/3669676-mid-level-performance-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mid-Level Performance Engineer - **Company:** zuven Technologies - **Location:** New York, NY, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** Agile Methodology, Software Applications, Application Performance Management, Application Testing, Automation of Tests, C Sharp (Programming Language), Software Debugging, HP Loadrunner, HP Quality Centers, Team Foundation Server, Selenium, SQL Databases, Technical Data Management Systems, Test Management, User Interface Testing, UML, Specflow, Playwright, Api Management - **Published:** October 10, 2026 - **Apply:** https://www.careerjet.com/jobad/usd2ca79a34fd830395e9aa85cca21a1b1 ## About the Role C#, Selenium, Specflow, and Playwright. Strong C# experience. Must be able to write C# code. Roughly 5 years of experience with Selenium in a C# environment. Expertise building automation frameworks from scratch. Expertise in UI testing and API Testing. Experience in Agile development, experience with Team Foundation Server, including entering User Stories, Bugs, Enhancements, Burndown, and working with offshore resources. Strong test management skills and a thorough understanding of testing and analysis deliverables (including UML artifacts and how they relate to the development process). Strong technicla acumen and track record of hands-on implementations across multiple technologies. Experience using modern testing tools required (ex. Quality Center, Load Runner, etc.). Ability to translate technical data and concepts into actionable testing approaches. Strong background in implementing enterprise initiatives on a large scale. Desired Skills & Experience - Ownership - Someone who can be given a task to do and can be trusted that they'll get it done properly. Ability to write SQL queries. ERP experience is preferred. Project work may include integration with ERP systems. Ability to function well in a very technical environment. ## Description This role works with client applications and involves application testing and providing recommendations for optimization. Required Skills - C# Selenium Specflow Playwright, Responsible for documenting, testing, and supporting efficient and effective computer applications and tools consistent with established specifications and business requirements. Responsible for application performance testing.