Performance Test Engineer

Role Overview

As a Performance Test Engineer (Senior Associate) at Kainos, you’ll work within a multi‑skilled agile team, developing and executing non‑functional tests while learning about new technologies and approaches.

• Develop and run performance, load, and stress tests for web and API‑based systems.

• Analyze performance bottlenecks across application, database, and infrastructure layers.

• Design and maintain performance testing frameworks and benchmarks.

• Integrate performance testing into CI/CD pipelines (Jenkins, Git Lab CI, Team City).

• Generate and communicate performance reports and KPIs to technical and non‑technical audiences.

• Strong proficiency with performance testing tools (e.g., JMeter, Gatling)
• Solid working knowledge of Java (or Scala) for scripting and custom logic
• Deep understanding of HTTP, REST, JSON, and API performance testing principles
• Experience designing and executing performance, load, and stress tests for web and API‑based systems
• Proven ability to analyse performance bottlenecks across application, database, and infrastructure layers
• Experience with CI/CD integration for automated performance testing (e.g., Jenkins, Git Lab CI, Team City)
• Competence in analysing system metrics (CPU, memory, I/O, network) from logs and monitors
• Experience with cloud infrastructure (AWS, Azure) and distributed load testing
• Understanding of database performance and query optimisation (e.g., Postgre
  
  SQL, MySQL, Dynamo
  
  DB)
• 3+ years in performance testing/engineering roles
• Demonstrated ability to collaborate with development and Dev Ops teams to resolve performance issues
• Experience generating and communicating performance reports and KPIs to technical and non‑technical audiences
• Prior involvement in capacity planning, tuning, and production performance investigations
• Familiarity with Agile delivery and testing practices

• Experience building scalable and reusable performance testing frameworks
• Ability to define and maintain performance benchmarks, KPIs, and baselines
• Integration of performance testing into CI/CD pipelines for automated validation
• Experience with performance monitoring dashboards (e.g., Grafana, Prometheus, AWS Cloud Watch)
• Exposure to end‑to‑end performance validation across cloud platforms (Azure, GCP, AWS)
• Experience with trend analysis and comparative performance reporting across releases
• Mentoring junior engineers in performance testing concepts, workload modelling, and analysis techniques

At Kainos, we are committed to building a diverse team that values, respects, and gives everyone an equal chance to thrive. We actively seek talent from all backgrounds, regardless of age, race, ethnicity, gender, sexual orientation, religion, disability, or any other characteristic that makes them who they are.

We believe every candidate deserves a level playing field.