Performance Engineer

Location: Mississauga, ON

Onsite Flexibility: Hybrid

Contract Details

- Position Type: Contract
- Contract Duration: 1 year (extension possible)
- Pay Rate: C$60.00 C$70.00 / Hour (CAD)
- Shift / Schedule: Monday to Friday core business hours; some performance executions may need to occur late evening or weekends due to application dependencies
- Travel Requirements: Not required

Job Summary

This is a senior, hands-on Performance Engineer position supporting important enterprise-level projects for a major financial institution. The role requires extensive experience in end-to-end Performance Engineering, with JMeter and Dynatrace at the core. The biggest screening distinction is that the client wants someone capable of engineering-level investigation and root-cause analysis not someone limited to performance-test execution. The candidate will be part of a smaller 5 6 person pod/team within a larger global practice of 100+ professionals, with teams distributed across Canada, the U.S., India, and offshore. The candidate is expected to be an independent individual contributor, handling approximately 95% of responsibilities independently, while collaborating extensively with developers, business teams, stakeholders, and offshore teams. This role could be supporting anywhere across the enterprise, and performance will be measured by deliverables.

Key Responsibilities

- Expertise across all phases of Performance Engineering activities including Requirement Gathering, Planning, Scripting, Execution, Analysis, Troubleshooting, Tuning, and Reporting to evaluate and improve application performance.
- Go beyond simply running a test investigate why an application is slow, perform root-cause analysis, understand the underlying application architecture, provide actionable insights to developers, suggest workarounds/solutions, and think independently to solve performance problems.
- Independently handle the full performance testing lifecycle: non-functional requirements gathering, performance test planning, test strategy/design, JMeter scripting, test execution, monitoring, analysis, troubleshooting, performance tuning/optimization, reporting, and root-cause analysis.
- Interact with stakeholders, gather non-functional requirements, participate in troubleshooting discussions, explain performance risks/issues, collaborate with development teams, and work across geographically distributed teams.
- Ask the right questions, rather than simply execute instructions.
- Collaborate with cross-functional teams including developers, architects, operations, and business stakeholders to analyze results, recommend optimizations, and drive performance improvements.

Required Experience

- 6+ years of experience in performance testing and performance engineering (this is the bare minimum).
- Demonstrated experience in end-to-end scripting for APIs, web applications, microservices, MQ, Kafka, etc.
- Substantial hands-on JMeter experience at an expert level.
- Deep experience with Dynatrace for performance monitoring and application insights, including the ability to investigate application performance issues.




- Experience with heap dump and thread dump analysis.
- Experience identifying and resolving performance bottlenecks in application, database, and infrastructure components.
- Experience with cloud-based applications and APIs and microservices.

Must-Have Requirements

- Core Performance Testing & Engineering Skills (Primary Must Have)
- JMeter Proficient in developing and executing performance testing scripts and scenarios, with the ability to enhance/customize using advanced scripting techniques.
- Dynatrace Solid expertise in deep-dive performance monitoring and analysis, providing actionable insights to diagnose and resolve bottlenecks.
- Performance Testing Skilled in defining workload models, simulating production-like scenarios, executing large-scale performance tests, and analyzing results to ensure system stability, scalability, and reliability.
- Non-Functional Requirements & Architecture Solid understanding of NFRs, system architecture, and technology stacks to ensure comprehensive performance coverage.
- Performance Tuning & Optimization Ability to fine-tune application, database, and infrastructure components for optimal performance.

Nice-to-Have Requirements

- Advanced Troubleshooting & Optimization (Secondary Good to Have)
- Splunk, Log Analysis & Datadog Skilled in log-based diagnostics and observability for identifying and resolving complex performance issues.
- SRE Skillsets Exposure to Chaos Engineering, Observability, Monitoring production workloads, and contributing towards transition into an SRE role.
- Test Data & Virtualization Ability to define test data strategy, collaborate with TDM teams, and develop Virtual Services using Mountebank for performance testing.
- Client-Side & End-User Experience Experience with tools to measure and enhance end-user performance experience.
- Collaboration & Communication
- Proven ability to work with cross-functional teams including developers, architects, operations, and business stakeholders to analyze results, recommend optimizations, and drive performance improvements.
- Strong analytical and problem-solving skills with a focus on delivering measurable performance gains.

Required Skills

- JMeter expert level; end-to-end scripting required for APIs, web applications, microservices, MQ, Kafka, etc.
- Dynatrace deep performance monitoring and application insights; ability to investigate application performance issues.
- Performance testing and performance engineering (not limited to test execution must be able to investigate issues, identify root causes, and provide recommendations to development teams).
- Non-functional requirements (NFR) gathering and architecture understanding of technology stacks.
- Performance tuning and optimization across application, database, and infrastructure components.




- Application architecture understanding and performance bottleneck identification.
- Troubleshooting and optimization.
- Strong communication skills candidate will regularly interact with stakeholders, gather requirements, participate in troubleshooting discussions, and collaborate with development and offshore teams.

Preferred Skills

- Splunk, Log Analysis & Datadog log-based diagnostics and observability for identifying and resolving complex performance issues.
- SRE Skillsets exposure to Chaos Engineering, Observability, monitoring production workloads, and contributing toward transition into an SRE role.
- LoadRunner or other commercial performance-testing tools.
- Current Relic, Datadog, or other monitoring tools.
- Kafka, MQ, cloud platforms.
- Banking/financial services experience.
- Previous experience at the client organization (ideal).

Education Requirements

- Bachelor's degree required.
- Certifications are not mandatory.

Work Environment / Physical Requirements

- Hybrid work model currently 2 days per week in office; candidates can work both days in downtown Toronto or Mississauga.
- No regularly scheduled after-hours meetings.
- Some performance executions may need to occur late evening or weekends due to application dependencies; however, the team can generally schedule/automate executions so the engineer does not necessarily need to personally work those hours.
- No routine weekend work is expected.
- Candidate will work within a globally distributed team (Canada, U.S., India, offshore).

Important Notes

- Interview process: likely two rounds Round 1 is approximately a 30-minute virtual interview (initial technical screening with practical scenario-based questions); Round 2 is in-person (detailed technical discussion, held in downtown Toronto or Mississauga depending on candidate convenience, with a possible hands-on JMeter scripting assessment).
- Candidates should be prepared to demonstrate practical JMeter knowledge.
- Candidate will not have access to customer data.

About the Client

This client is a leading financial services and banking institution operating at an enterprise scale, with teams distributed across Canada, the United States, India, and offshore locations globally. The organization employs more than 100 performance engineering professionals within its global practice alone and relies on technology professionals including performance engineers, solutions developers, and IT specialists to support critical enterprise applications and infrastructure. Contractors supporting this client may work across multiple lines of business throughout the enterprise.

About GTT

GTT is a minority-owned staffing firm and a subsidiary of Chenega Corporation, a Native American-owned company in Alaska. We highly value diverse and inclusive workplaces and support Fortune 500 organizations across banking, financial services, technology, life sciences, biotech, utilities, and retail sectors throughout the U.S. and Canada.

- Medical, Vision, and Dental Insurance Plans
- 401k Retirement Fund

Job Number: 26-14247 Industry: Engineering

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📌 Performance Engineer (Mississauga)
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