Sr Specialist Performance Test Engineer

Role Overview

We are looking for a skilled Performance Test Engineer with strong experience in designing, developing, and executing performance tests for web applications, APIs, and enterprise systems. The ideal candidate should have hands-on expertise with LoadRunner, k6, Locust, and Python, along with a solid understanding of performance engineering principles, bottleneck analysis, and test automation.

Key Responsibilities

• Design, develop, and execute performance, load, stress, spike, and endurance tests for applications and services.

• Create and maintain performance test scripts using LoadRunner, k6, and Locust.

• Develop and enhance test frameworks and utilities using Python.

• Analyze application performance, identify bottlenecks, and provide tuning recommendations.

• Monitor system behavior during test execution and collect metrics from application, server, database, and network layers.

• Collaborate with developers, QA, DevOps, and business teams to define performance requirements and acceptance criteria.

• Prepare detailed performance test plans, reports, and dashboards with actionable insights.

• Support root cause analysis for performance issues and work with cross-functional teams on remediation.

• Integrate performance testing into CI/CD pipelines for continuous performance validation.

• Ensure adherence to performance testing best practices, standards, and governance.

Required Skills

• Strong hands-on experience with LoadRunner for enterprise performance testing.

• Experience with modern open-source performance testing tools such as k6 and Locust.

• Proficiency in Python for scripting, automation, and custom test framework development.

• Good understanding of performance testing concepts: load, stress, spike, soak/endurance, and scalability testing.

• Experience testing REST APIs, web applications, and microservices.

• Knowledge of application monitoring and observability tools such as Dynatrace, AppDynamics, Splunk, Grafana, Prometheus, or New Relic.

• Familiarity with SQL and database performance analysis.

• Understanding of cloud environments such as AWS, Azure, or GCP.

• Experience with CI/CD tools like Jenkins, GitLab CI, or Azure DevOps.

• Strong analytical and troubleshooting skills.

Preferred Qualifications

• Experience in performance engineering for distributed systems and microservices architecture.

• Knowledge of JavaScript/TypeScript for k6 scripting.

• Experience with containerized environments such as Docker and Kubernetes.

• Familiarity with Linux/Unix commands and shell scripting.

• Exposure to Agile/Scrum development methodologies.

• Certification in performance testing tools or cloud technologies is a plus.

Education and Experience

• 8+ years of experience in performance testing and engineering.

• Proven experience in performance analysis, reporting, and stakeholder communication.

Weekly Hours:

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It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made.