9 of 9 Load Testing Jobs in London

Performance Tester

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£420 - £470/day Outside IR35 Hybrid working
scalable, reliable, and meet agreed performance targets across business-critical digital services. You will play a key role in validating system behaviour under load, identifying bottlenecks, and providing clear, actionable insight to delivery teams to drive performance improvements. Key Responsibilities Design, build, and execute performance, load, and stress … performance Contribute to performance test strategies and best practices Support continuous improvement of tooling, approaches, and reporting Essential Skills & Experience Proven experience in performance testing within modern digital environments Strong hands-on experience with tools such as: JMeter Gatling Azure Load Testing or similar cloud-based load ...

Automation Quality Assurance Engineer - Digital Platforms

Hiring Organisation
E.ON
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
love diving into both the technical and human side of software, have an eye for detail and get a thrill from seeing your testing contribute to flawless customer journeys this could be the role for you. We believe in balance, flexibility, autonomy and inclusion are at the heart … ensuring quality across our digital platforms from backend logic to front end usability. You'll be hands on with both manual and automated testing, building quality in from the very first story and ensuring that releases are stable, usable and trustworthy. You'll work shoulder to shoulder with developers ...

QA Automation Engineer (Python / PyTest / Cosmos DB)-Banking Client Exp Required

Hiring Organisation
Vallum Associates
Location
City of London, London, United Kingdom
regulatory compliance across systems that handle large transaction volumes and business-critical data. The ideal candidate will be hands-on in manual and automated testing, with strong experience in Python, PyTest, and exposure to Cosmos DB. The role also requires close collaboration with developers, product owners, and data engineering … data validation across ETL pipelines, databases, and reporting layers Develop, maintain, and enhance test automation scripts using Python and PyTest Support API testing using tools such as Postman and Python libraries Validate system performance and scalability using performance and load testing tools Ensure systems and data meet ...

Senior Web Developer

Hiring Organisation
EC Markets UK
Location
City of London, London, United Kingdom
Performance & Infrastructure for Launch Ensure website infrastructure can handle significant traffic increases during product launch periods Implement performance monitoring to maintain sub-2-second load times Conduct load testing and stress testing prior to major product launches Monitor website uptime and performance metrics in real-time … heat mapping) to measure campaign performance Manage website forms, landing pages, and conversion optimisation for app installs and sign-ups Support A/B testing of landing pages, CTAs, and product messaging Develop SEO strategy for product-specific content to drive organic traffic Product Launch Campaign Support Develop dedicated ...

Quality Assurance Automation Engineer

Hiring Organisation
Retelligence
Location
City of London, London, United Kingdom
that the global financial market relies on every single day. The Technical Stack The Backbone: C#/.NET Core for robust automation development. Behavioral Testing: BDD implementation using SpecFlow or Reqnroll . Modern UI & API: Advanced automation utilizing Playwright and Selenium for both interface and deep-layer REST … ensuring automated triggers and data quality checks are seamless and fail-safe. Agile Innovation: Contribute to a culture that prioritizes Clean Code and innovative testing methodologies, including performance and load testing with tools like NeoLoad . Who You Are The FinTech Specialist: You have a commercial background ...

Technical Lead/Engineer Lead - London

Hiring Organisation
Evolve Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£71,000 - £113,000 per annum
with clients, demonstrating credibility in technology and overall delivery Proven capability in shaping the end-to-end software delivery lifecycle, driving improvements across development, testing, deployment, and operational phases. Ability to implement infrastructure-as-code, CI/CD, and efficient release management strategies. Enhance system performance using load testing, caching, and optimizing database queries and application logic for better scalability and response times. Expertise in modern engineering standards such as TDD, contract testing, and secure coding, as well as architectural patterns like event-driven architecture and platform migration. Experience providing technical subject matter expertise ...

Software Engineer in Test

Hiring Organisation
Balance Talent
Location
City of London, London, United Kingdom
interview process Why should you be interested in this opportunity? You’ll be part of a dynamic multi-disciplinary team, taking ownership of Automated Testing They have recently been acquired by another successful business, providing a larger community of QA/Developers to work with and enjoy the ride … upon an existing robust, scalable Test Automation framework with a bias towards frontend UI - React From planning to execution, you’ll know full-stack testing and how to implement modern approaches for maximum impact (Web/API/early visibility of quality on CI/CD pipelines ...

Site Reliability Engineer (SRE)

Hiring Organisation
Charles Simon Associates Ltd
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£100,000 - £125,000 per annum
policies, and vulnerability scanning Collaborating with DevOps and platform teams to build paved-road deployment patterns and internal developer portals Leading capacity planning and load testing efforts to anticipate scaling needs and prevent bottlenecks Contributing to architectural decisions that impact reliability, latency, and fault domains across distributed systems ...

Java Developer – Market Connectivity

Hiring Organisation
Solytics Partners
Location
City of London, London, United Kingdom
event-driven, and asynchronous design patterns to improve throughput and efficiency. Troubleshoot and resolve connectivity, performance, and messaging issues in production. Conduct latency tuning, load testing, and system optimization. Collaborate with SRE/DevOps teams to improve observability, CI/CD, and deployment pipelines. Key Requirements: Strong expertise ...