Software Development Engineer in Test (SDET) – Performance Focus
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Job Description
SDET building performance and automation testing systems for Cayuse’s scientific research technology. Evaluating reliability, scalability, and quality across web, API, and backend products.
Responsibilities:
- Develop and maintain performance testing and automated test frameworks
- Evaluate application reliability, scalability, and responsiveness under varying load and stress levels at team and enterprise levels
- Design and execute performance test strategies, including functional automation, load, stress, endurance, spike, and scalability testing
- Establish and maintain performance baselines and analyze results for trends and regressions
- Collect, analyze, and interpret CPU, memory, throughput, response time, latency, and error-rate metrics
- Identify bottlenecks, performance degradation, and root causes through profiling and diagnostics
- Partner with DevOps and Engineering teams to define realistic test environments and datasets
- Provide performance test reports and optimization recommendations
- Collaborate with software engineers, product owners, and QA on test strategies and acceptance criteria
- Design, develop, and maintain automated tests for web, API, and backend systems
- Integrate automated tests into CI/CD pipelines for continuous testing
- Identify, document, and track bugs through resolution
- Perform code reviews for test code and contribute to test automation best practices
- Develop tools and utilities to improve test automation and coverage
- Analyze test results and communicate product quality insights and risks
- Participate in Agile/Scrum ceremonies, sprint planning, and retrospectives
- Provide comprehensive coverage through both automation and manual testing
Requirements:
- 3+ years of experience in software testing, with demonstrated experience in both test automation and performance testing
- Hands-on experience with k6 as a primary performance testing tool
- Hands-on experience with Playwright for test automation (Cypress or Selenium also considered)
- Proficiency in one or more programming languages such as Python, Java, TypeScript, or JavaScript
- Strong understanding of QA methodologies, test processes, and best practices
- Experience testing APIs using tools such as Postman, REST-assured, or similar
- Experience with CI/CD tools and repository management (Bitbucket, Jenkins, or similar)
- Experience with creating, setting up, and executing manual test cases, preferably in Zephyr
- Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent work experience
- Familiarity with object-oriented programming concepts
- Working knowledge of APM tools such as Grafana, New Relic, Datadog, Dynatrace, or AppDynamics
- Ability to interpret logs, metrics, and traces to pinpoint performance issues
- Familiarity with profiling tools, including GC analysis, thread dumps, and heap dumps
- Experience building and maintaining performance testing frameworks using k6
- Experience building and maintaining automation frameworks such as Playwright, Cypress, or Selenium
- Experience writing automated tests for UI, API, and backend components
- Experience with data-driven, behavior-driven, or keyword-driven testing
- Experience integrating test automation into CI/CD pipelines such as Bitbucket, Jenkins, GitLab CI, or GitHub Actions
- Experience testing REST/SOAP APIs and validating status codes, response schemas, performance, and edge cases
- Familiarity with AWS, GCP, or Azure and container technologies such as Docker and Kubernetes
- Understanding of version control systems and infrastructure as code such as Terraform
- Ability to model real-world user behavior and traffic patterns
- Risk-based and white-box testing mindset
- Ability to define testing scope, scenarios, workloads, and success criteria
- Ability to define and track test coverage, defect leakage, test execution rate, response times, error rates, throughput, resource utilization, and scalability KPIs
- Ability to write test cases covering functional, integration, regression, and edge cases
- Strong understanding of system-level and architectural dependencies
- Experience using JIRA or Azure DevOps to log, track, and manage bugs
- Root cause analysis and collaboration with developers for resolution
- Excellent verbal and written communication skills
- Ability to work effectively in a fast-paced, collaborative environment
Benefits:
- Competitive Medical Benefits (PPO + HSA available)
- Vision, Dental, Short-Term Disability fully covered by Cayuse
- Unlimited PTO + Holidays + Flexible Work Schedule
- Remote Work Stipend
- Equal Paid Parental Leave
- 401k with Employer Matching
- Quarterly Wellness Reimbursement
- Remote Work Environment, supporting the Ultimate Employee Experience
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