Senior Performance Test Engineer

About the role

We are partnering with a leading technology‑driven telecommunications organisation that is rapidly scaling its digital initiatives and platforms. The Senior Performance Test Engineer / Performance Engineering Lead will own performance testing, drive improvements across large‑scale systems, and work with cross‑functional engineering teams to enhance application reliability and user experience.

Key responsibilities

• Take ownership of existing performance test scripts and frameworks currently managed by vendors.
• Design, schedule and drive end‑to‑end performance testing activities.
• Define performance testing strategies, scenarios, workload models, test environments, expected results and success criteria.
• Establish and track application and service performance metrics, NFRs and SLOs.
• Build capacity and load models in collaboration with Architecture and Engineering teams.
• Analyse performance test results, identify bottlenecks and work with engineering teams to drive improvements.
• Collaborate closely with Engineering, QA, Architecture and Product stakeholders to align performance objectives.
• Provide performance insights and recommendations to improve scalability, stability and user experience.
• Support performance triage, release governance, performance sign‑off and release‑blocking decisions.
• Communicate performance test outcomes and recommendations to both technical and non‑technical stakeholders.

Required profile

• Strong experience defining Non‑Functional Requirements (NFRs) and Service Level Objectives (SLOs) with Architecture and Engineering teams.
• Proven ability to build capacity and workload models based on business and technical requirements.
• Hands‑on expertise with performance testing tools such as k6, JMeter, Gatling or LoadRunner.
• Experience executing performance tests at production‑like scale, including distributed load generation.
• Hands‑on experience with observability/APM platforms like Dynatrace, AppDynamics, New Relic, Grafana, Prometheus, Splunk, ELK or OpenTelemetry.
• Strong understanding of cloud‑native and distributed application environments, including Docker/containers and Kubernetes.
• Ability to communicate performance results and recommendations effectively to non‑technical audiences.
• Experience mentoring engineers and establishing or improving a performance testing practice.

Required skills

• k6
• JMeter
• Gatling
• LoadRunner
• Dynatrace
• AppDynamics
• New Relic
• Grafana
• Prometheus
• Splunk
• ELK
• OpenTelemetry
• Docker
• Kubernetes
• REST
• gRPC
• WebSockets
• Messaging/queue systems