Senior Performance Testing Engineer

Cognizant; Toronto; Hybrid; CAD 75,000 - 95,000; Full time

Benefits offered by this job

Discretionary bonus

Wellbeing programs

Hybrid work model

Job summary

Cognizant in Toronto is seeking a Senior Performance Testing Engineer with hands-on experience in JMeter and Dynatrace to ensure the speed, scalability, and reliability of our enterprise applications. You will design complex workload models, run load and soak tests, and drive root cause resolution with advanced monitoring.

This role embraces Agile practices and requires coordinating with development teams. The position offers a hybrid work arrangement with four days a week in an office, plus

Qualifications

• 8+ years hands-on performance testing experience.

Responsibilities

• Design, build, and execute performance, load, and soak tests for complex enterprise apps.
• Design and execute load and stress test scenarios using JMeter.
• Monitor performance and resource utilization with Dynatrace and other APM tools.
• Analyze results to diagnose bottlenecks and latency issues.
• Perform RCA on performance problems and provide actionable recommendations.
• Integrate tests into deployment pipelines for continuous validation.

Skills

Performance testing

Scripting

Linux fundamentals

Analytical thinking

Tools

JMeter

Dynatrace

Prometheus

Datadog

Docker

Kubernetes

Mountebank

Splunk

MySQL

Job description

We are seeking a Senior Performance Testing Engineer with hands‑on experience in JMeter and Dynatrace to ensure the speed, scalability, and stability of our enterprise applications. In this role, you will design complex workload models, execute comprehensive load and stress tests, and leverage advanced APM tools to isolate bottlenecks, monitor infrastructure health, and drive root cause resolution.

In this role, you will

• Design, build, and execute performance, load, stress, and soak tests for complex enterprise applications.
• Design and execute comprehensive load, stress, and endurance test scenarios using JMeter.
• Monitor application performance, system resource utilization, and end-to-end transaction flows using Dynatrace.
• Analyze test results and system metrics to diagnose bottlenecks, memory leaks, latency issues, and throughput constraints.
• Monitor system, application, database, and server performance during test execution.
• Perform root cause analysis (RCA) on performance problems and provide actionable recommendations to architecture and development teams.
• Participate in Agile ceremonies and contribute to continuous performance improvements.
• Integrate performance testing scripts and monitoring checks into deployment pipelines to support continuous performance validation.

Work Model

We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a hybrid position requiring 4 days a week in a client or Cognizant office in Toronto, ON. Regardless of your working arrangement, we are here to support a healthy work-life balance though our various wellbeing programs.

Note: The working arrangements for this role are accurate as of the date of posting. This may change based on the project you’re engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.

What you need to have to be considered

• 8+ years of hands‑on experience in performance testing & engineering using JMeter and APM tools (Prometheus, Dynatrace, Datadog).
• Must have 4+ years of experience in Apache JMeter.
• Proficiency in various scripting techniques, develop custom codes for enhancing and customizing performance testing scripts and scenarios using JMeter.
• Excellent understanding of concepts like NFR gathering , Workload modelling, Root Cause Analysis of performance problems.
• Experience with some of the following technologies and services:

1. Cloud based Infrastructure as a Service (especially Azure)
2. Container based service schedulers (e.g., Docker, ECS, Kubernetes, etc.)
3. MySQL, Java, Python
4. Log management tools (Splunk)

• Demonstrate excellent Linux fundamentals and solid understanding of diagnosing system utilization.
• Experience working with large scale distributed systems & large data volumes.
• Strong analytical and problem-solving skills, with the ability to diagnose performance issues and propose effective solutions.
• Experience in developing virtual services using Mountebank to remove backend/third-party dependencies.

These will help you stand out

• Experience with Chaos Engineering & Observability is nice to have to transition towards an SRE role.
• Banking Domain is nice to have.

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.

Total compensation

We regularly assess market data to ensure we offer a competitive compensation package for our associates. The base salary for this position ranges between CAD 75,000 – 95,000 per year. Where the successful candidate may fall within the range depends on relevant education, work and/or management experience and other business-related and job-necessary qualifications. This position is also eligible for Cognizant’s discretionary annual performance-based bonus, as well as benefits that support your physical, mental and financial wellbeing.