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Senior Performance Tester

SR2 Clean Energy

Remote

GBP 60,000 - GBP 80,000

Full time

Today
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Job summary

A leading technology recruitment firm is looking for a Senior Performance Tester to join a high-growth team. This fully remote role involves designing and executing performance testing strategies within a distributed Machine Learning platform. The successful candidate will influence system reliability and scalability, working closely with engineering teams. Ideal for a contractor ready to tackle challenging problems and deliver impactful results quickly, this position offers a dynamic working environment and flexibility outside IR35.

Qualifications

  • Strong experience in performance and load testing.
  • Proficiency in Python and familiarity with AWS.
  • Ability to analyse system behaviour under load.

Responsibilities

  • Design and implement performance testing frameworks.
  • Execute stress testing on distributed ML workflows.
  • Provide clear reporting on system performance and recommendations.
  • Work autonomously in a fast-moving engineering environment.

Skills

Performance testing
Load testing
Stress testing
Python
AWS
Machine Learning
TypeScript
Job description
Senior Performance Tester

Contract | Outside IR35 | Fully Remote | 3 Months

We are seeking a Senior QA Engineer specialising in performance and load testing to join a high-growth,

Contract Details
  • Length: 3 months (initial, strong extension potential)
  • IR35: Outside IR35
  • Working Model: Fully remote
  • Start: ASAP
  • Interview Process: Single-stage
Technical Environment
  • Backend: Python
  • Frontend: TypeScript
  • Platform: Machine Learning workflows / ML platform
  • Cloud: AWS
Role Overview

You will be responsible for designing and executing load, stress, and performance testing strategies across a distributed ML platform. The objective is to rapidly identify bottlenecks, validate system resilience, and provide actionable insights to engineering leadership.

This role sits close to core engineering and platform teams and will directly influence system reliability and scalability.

Key Responsibilities
  • Design and implement performance and load testing frameworks.
  • Execute stress testing across distributed systems and ML workflows.
  • Analyse system behaviour under load and identify.
  • Work closely with backend and platform engineers to validate fixes.
  • Provide clear reporting on system performance, risks, and recommendations.
  • Operate autonomously in a fast-moving, high-trust engineering environment.
Why This Role
  • Short, high-impact engagement with real engineering influence.
  • Modern tech stack across ML, cloud, and distributed systems.
  • Strong likelihood of follow-on work for the right engineer.
  • Fully remote, Outside IR35, fast interview process.

This role suits a senior contractor who enjoys solving hard technical problems quickly and delivering tangible impact in a short timeframe.

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