Performance Test Engineer

Worldhire; Cirencester; On-site; GBP 70,000 - 110,000; Full time

Job summary

Worldhire seeks an experienced Senior Performance Test Engineer to drive non-functional testing across core wealth management and enterprise platforms. You will design, develop, and execute end-to-end performance test strategies, identify bottlenecks, and ensure high availability under peak loads, collaborating with architects, DevOps, and client stakeholders.

You will champion JVM tuning, query optimization, and automation using JMeter, BlazeMeter, LoadRunner, or k6, and integrate tests into

Qualifications

• 8–10 years of hands-on experience in Performance Engineering and Non-Functional Quality Assurance.
• Financial Services, Wealth Management, Telecom, or Enterprise SaaS familiarity.
• Expert-level proficiency in JMeter, BlazeMeter, or HP LoadRunner.
• RESTful API and Web Services testing experience with Postman, SoapUI, or JMeter.
• Direct experience with AppDynamics, New Relic, AWS CloudWatch, or native profilers.
• Strong knowledge of Agile/Scrum and shift-left performance practices.
• Excellent client-facing communication and ability to present results to stakeholders.
• Hands-on SQL/JVM tuning and code-level optimization.
• Cloud capacity planning and scalability across AWS/Azure.

Responsibilities

• Define, design, and execute non-functional test plans, including Load, Stress, Spike, Endurance, and Scalability testing across web apps, microservices, and APIs.
• Own performance fixes with engineering teams, including JVM tuning and query optimization.
• Influence system design for scalability during design reviews.
• Drive cloud scalability and capacity decisions with auto-scaling and sizing.
• Support production performance monitoring and RCA.
• Build, maintain, and optimize automated performance test scripts using JMeter, BlazeMeter, HP LoadRunner, or k6.
• Monitor server-side, DB, and app metrics with AppDynamics, New Relic, CloudWatch, or Dynatrace to isolate bottlenecks.
• Integrate performance tests into CI/CD pipelines with Jenkins, Azure DevOps, or GitLab.
• Utilize AI-assisted testing tools to accelerate script generation and analysis.
• Collaborate with architects, DevOps, and stakeholders to translate NFRs into KPIs.
• Produce clear performance evaluation reports and document defects.

Skills

Performance testing

Non-functional QA

Agile/Scrum

Communication

SQL tuning

JVM tuning

Cloud architecture

APM tools

Tools

JMeter

BlazeMeter

HP LoadRunner

k6

Postman

SoapUI

AppDynamics

New Relic

AWS CloudWatch

Dynatrace

Jenkins

Azure DevOps

GitLab

Job description

We are seeking an experienced and hands-on Senior Performance Test Engineer to drive non-functional testing across core wealth management and enterprise platforms. In this role, you will be responsible for designing, developing, and executing end-to-end performance test strategies, identifying system bottlenecks, and ensuring high application availability, scalability, and resilience under peak loads.

Key Responsibilities

• Performance Strategy & Execution: Define, design, and execute comprehensive non-functional test plans, including Load, Stress, Spike, Endurance, and Scalability testing across web applications, microservices, and API architectures.
• Performance Remediation: Own performance fixes with engineering teams, including JVM tuning, query/index optimization, thread/heap/GC analysis.
• Architecture Input: Influence system design for scalability during design reviews, rather than limiting performance validation to post-build testing.
• Capacity Planning: Drive cloud scalability and capacity decisions, including auto-scaling and resource sizing, based on performance test outcomes.
• Production Ownership: Support production performance monitoring and incident Root Cause Analysis (RCA).
• Scripting & Framework Development: Build, maintain, and optimize robust automated performance test scripts using Apache JMeter, BlazeMeter, HP LoadRunner, or k6.
• APM & Bottleneck Identification: Monitor and analyze server-side, database, and application metrics during test runs using APM tools such as AppDynamics, New Relic, AWS CloudWatch, or Dynatrace to isolate performance bottlenecks and degradation.
• CI/CD Integration: Integrate automated performance test suites into DevOps continuous deployment pipelines using Jenkins, Azure DevOps, or GitLab to enable early shift-left performance testing.
• AI & Modern Automation: Utilize AI-assisted testing tools, including Microsoft 365 Copilot and Generative AI, to accelerate test script generation, log analysis, and performance reporting.
• Cross-Functional Collaboration: Partner closely with Solution Architects, DevOps Engineers, and client stakeholders to translate non-functional requirements (NFRs) into measurable performance KPIs.
• Reporting & Defect Management: Produce clear, actionable performance evaluation reports, document non-functional defects, and recommend tuning/remediation strategies to engineering teams.

Required Skills & Qualifications

Must-Have

• Experience: 8–10 years of hands-on experience in Performance Engineering and Non-Functional Quality Assurance.
• Domain Exposure: Financial Services, Wealth Management, Telecom, or Enterprise SaaS platforms.
• Core Tooling: Expert-level proficiency in JMeter, BlazeMeter, or HP LoadRunner.
• API Testing: Solid experience testing RESTful APIs and Web Services using Postman, SoapUI, or JMeter.
• APM / Monitoring: Direct experience with AppDynamics, New Relic, AWS CloudWatch, or native server profilers.
• Methodologies: Strong operational knowledge of Agile/Scrum delivery and shift-left performance practices.
• Communication: Excellent client-facing communication skills with experience presenting test results to technical and business stakeholders.
• Technical Tuning: Hands-on experience with query/code-level tuning, including SQL, JVM, or equivalent technology stacks.
• Cloud: Working knowledge of cloud capacity planning and scalability architecture across AWS/Azure.

Nice-to-Have

• Experience working on Salesforce / Data Platform performance testing.
• Familiarity with cloud platforms such as AWS / Azure.
• Hands-on use of Generative AI / Copilot for testing productivity.
• ISTQB Technical Test Analyst or relevant Performance Testing certification.