Performance Test Engineer

We are looking for an experienced Performance Tester with strong expertise in performance engineering, load testing, and capacity planning. The candidate will be responsible for defining and executing performance test strategies for complex applications, identifying system bottlenecks, and working closely with development, architecture, infrastructure, and DevOps teams to ensure optimal system performance, scalability, and reliability.

This role is primarily hands‑on with opportunities to provide technical leadership and guidance.

Responsibilities

Key Responsibilities

Performance Test Strategy & Planning

• Define end‑to‑end performance testing strategy aligned with business and non‑functional requirements
• Identify performance test scope, workloads, success criteria, and KPIs
• Prepare performance test plans, scenarios, scripts, and execution schedules
• Participate in architecture and design reviews from a performance standpoint

Test Design & Script Development

• Design and develop performance test scripts for load, stress, spike, endurance, and scalability testing
• Create realistic workloads based on production usage patterns
• Parameterize scripts, handle correlation, and apply best practices for script optimization
• Validate test data, environments, and monitoring setup before execution

Test Execution & Analysis

• Execute performance tests across different environments
• Monitor system behavior using application, database, and infrastructure metrics
• Analyze test results to identify performance bottlenecks related to application code, APIs, databases, middleware, network, or infrastructure
• Produce detailed performance reports with findings, recommendations, and tuning suggestions

Performance Engineering & Optimization

• Work with developers, architects, DBAs, and infrastructure teams to resolve performance issues
• Support root cause analysis and validation of fixes through re‑testing
• Provide recommendations on capacity planning, scalability, and resilience
• Contribute to continuous performance optimization initiatives

Tools, Monitoring & CI/CD Integration

• Integrate performance tests into CI/CD pipelines where applicable
• Use APM and monitoring tools to collect and analyze system metrics
• Ensure performance testing is part of release readiness and go‑live activities

Mentoring & Best Practices

• Provide technical guidance to junior performance testers
• Standardize performance testing processes, templates, and reporting
• Drive continuous improvement and adoption of performance engineering best practices

Qualifications

Required Skills & Experience

Performance Testing Tools

• 10–12 years of hands‑on experience in performance testing
• Strong expertise with one or more tools such as: 
  • LoadRunner (LR), JMeter, Gatling, NeoLoad

Technical & Engineering Skills

• Strong understanding of client–server, web, microservices, and API‑based architectures
• Experience testing web, mobile, and backend applications
• Proficiency in analyzing server‑side metrics (CPU, memory, GC, threads, I/O)
• Strong knowledge of HTTP/S, REST APIs, messaging systems, and caching mechanisms
• Hands‑on experience with SQL and database performance validation

Monitoring & Diagnostics

• Experience with monitoring and APM tools such as: 
  • AppDynamics, Dynatrace, New Relic, Grafana, Splunk, CloudWatch (as applicable)

CI/CD & Cloud (Preferred)

• Exposure to CI/CD tools (Jenkins, Azure DevOps, GitLab CI, etc.)
• Experience testing applications hosted on cloud platforms (AWS, Azure, GCP)
• Familiarity with containerized and distributed systems (Docker, Kubernetes) is a plus

Methodologies

• Strong understanding of SDLC and STLC
• Experience working in Agile / Scrum and DevOps environments

Soft Skills

• Strong analytical and troubleshooting skills
• Excellent communication and documentation abilities
• Ability to work independently and handle complex production‑like environments
• Proactive mindset with strong ownership and accountability

Preferred Qualifications

• Performance testing or cloud certification
• Exposure to SRE or production performance monitoring
• Domain experience in Banking, Financial Services, Retail, Telecom, or Healthcare

About UsAt Zensar, we’re “experience-led everything”. We are committed to conceptualizing, designing, engineering, marketing, and managing digital solutions and experiences for over 130 leading enterprises. We are a company driven by a bold purpose: Together, we shape experiences for better futures. Whether for our clients, our people, or the world around us, this belief powers everything we do. At the heart of our culture is ONE with Client - a set of four core values that reflect who we are and how we work: One Zensar, Nurturing, Empowering, and Client Focus.
Part of the $4.8 billion RPG Group, we’re a community of 10,000+ innovators across 30+ global locations, including Milpitas, Seattle, Princeton, Cape Town, London, Zurich, Singapore, and Mexico City. Explore Life at Zensar and join us to Grow. Own. Achieve. Learn. to be the best version of yourself.
We believe the best work happens when individuality is celebrated, growth is encouraged, and well-being is prioritized. We are an equal employment opportunity (EEO) and affirmative action employer, committed to creating an inclusive workplace. All qualified applicants will be considered without regard to race, creed, color, ancestry, religion, sex, national origin, citizenship, age, sexual orientation, gender identity, disability, marital status, family medical leave status, or protected veteran status.