Inperson _Lead Performance Engineer _Sunnyvale, CA

Job  - 27434

Posted Date: 10/09/2026

Experience:

-

Job Type: Contractual

• Job Title:
  
  Lead Performance Engineer
• Location:
  
  Sunnyvale, CA
• 6-12+ months
• Contract
• Hybrid role (Submit local candidates, F2F interview mode)

• We are looking for a skilled Lead Performance Engineer to design, develop, and execute performance testing strategies for enterprise and cloud-based applications. The ideal candidate has hands‑on experience with JMeter, Load runner, K6, Gatling, Data Dog, Dynatrace skills, and solid expertise in API, Web and automation testing.
• Candidate will work closely with development, QA, Dev Ops, and architecture teams to ensure applications are scalable, reliable, and performant. Key Responsibilities
• 12+ Yrs of experience in Performance Engineering
• Triaging Exp on network and AWS infra systems is required
• Design, develop, and maintain performance test scripts using Apache JMeter or similar tools for web, API, and backend systems
• Conduct load, stress, endurance, and scalability testing for applications and microservices
• Design, develop, and maintain automated test suites for Next.js applications, covering unit, integration, and E2E tests.
• Perform API performance testing (REST/JSON, SOAP) and integrate with automation frameworks
• Analyze test results, identify performance bottlenecks, and provide actionable recommendations
• Monitor system performance metrics (CPU, memory, GC, I/O, network) during test execution
• Collaborate with development and Dev Ops teams to optimize application and infrastructure performance
• Integrate performance tests into CI/CD pipelines
• Prepare detailed performance test reports and present findings to stakeholders
• Continuously improve testing frameworks, tools, and best practices Required Skills & Qualifications
• Strong experience in performance testing and engineering best practices
• Hands-on expertise with Apache JMeter (test plans, scripting, listeners, distributed testing)
• Front end performance testing experience on Next.js application
• Design and deployment of performance test framework
• Experience with API automation and performance testing (REST, SOAP)
• Knowledge of HTTP/HTTPS protocols, JSON, XML
• Experience with performance monitoring tools (APM, server logs, JVM monitoring)
• Familiarity with CI/CD tools (Jenkins, Git, etc.)
• Strong analytical, troubleshooting, and communication skills"

Applicants must be legally authorized to work in the United States.

Themesoft Inc is an Equal Employment Opportunity employer. We consider qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other status protected by applicable federal, state, or local law.

Skills :