Senior Performance Engineer - Cloud & Web App Performance

Themesoft Inc; Sunnyvale (CA); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Job summary

Themesoft Inc. in Sunnyvale, CA is seeking an experienced Lead Performance Engineer to design, develop, and execute performance testing strategies for enterprise and cloud-based applications.

You will lead testing programs, optimize performance across APIs, web fronts (Next.js), and AWS infrastructure, and collaborate with cross-functional teams to ensure scalable, reliable systems. The ideal candidate will guide performance testing initiatives, implement reusable frameworks, and deliver

Qualifications

• 12+ years of performance engineering and testing experience.
• Hands-on with JMeter, LoadRunner, k6, Gatling, and related tools.
• Experience with front-end performance testing for Next.js.
• Proficient in API performance testing (REST/JSON and SOAP).
• Troubleshoot network and AWS infrastructure performance issues.
• Strong collaboration with cross-functional teams.

Responsibilities

• Bring 12+ years of experience in performance engineering and optimization.
• Design, develop, maintain performance test scripts with JMeter/LoadRunner/k6/Gatling.
• Conduct load, stress, endurance, scalability, and capacity testing for web apps, APIs, microservices.
• Perform front-end performance testing for Next.js apps to identify bottlenecks.
• Develop automated test suites covering unit to end-to-end testing.
• Analyze results and provide recommendations for optimization.
• Monitor system metrics during tests and integrate with CI/CD pipelines.
• Collaborate with development, QA, DevOps, and architecture teams.

Skills

Performance testing

API testing

JMeter

LoadRunner

k6

Gatling

Datadog

Dynatrace

Next.js testing

AWS

CI/CD

Troubleshooting

Tools

Apache JMeter

LoadRunner

k6

Gatling

Datadog

Dynatrace

Next.js

REST/JSON testing

SOAP testing

AWS

Job description

Themesoft Inc. in Sunnyvale, CA is seeking an experienced Lead Performance Engineer to design, develop, and execute performance testing strategies for enterprise and cloud-based applications.

You will lead testing programs, optimize performance across APIs, web fronts (Next.js), and AWS infrastructure, and collaborate with cross-functional teams to ensure scalable, reliable systems. The ideal candidate will guide performance testing initiatives, implement reusable frameworks, and deliver