Senior web developer Work, Jobs in London, Eng (with Salaries)

Senior Performance Tester
IT VALLEY (LONDON) LIMITED —Egham
- £40,000 - £52,000 a year
- Full-time
- Hybrid work
- Software troubleshooting
- Business development
- Scripting
Quick apply
Senior Web & SEO Manager
Campions —London
- £60,000 a year
- Full-time
- Employee assistance programme
Quick apply
Senior Product Engineer (TS/NodeJS/Vue)
n8n —London
- £72,800 - £190,000 a year
- Full-time
- Remote
- Life insurance
Front End Developer, Officer
State Street —London
- Full-time
- Agile
- Financial services
Senior Graphic Designer
Ultralytics —London
- £80,000 - £150,000 a year
- Full-time
- Hybrid work
- Communication skills
- Annual leave
- Flexible schedule
Senior Manager, SEO & AI Search
House of CB —London
- Full-time
- Communication skills
Lead Web Developer - PHP/Laravel/Full Stack
Nteractive Consulting & Events Ltd —Staines-upon-Thames
- Hybrid work
- Master's degree
- Travel
- Mentoring
- Annual leave
- Employee assistance programme
Quick apply
Senior Test Analyst - C3
Scale Factory —London
- Hybrid work
- Agile
- Communication skills
- Annual leave
Senior Front-end JavaScript developer
Byte9 —London
- Agile
Full Stack Developer (Flutter-focused)
Big Potato —London
- Full-time
- Hybrid work
- APIs
- AI
- Employee assistance programme
Quick apply
Senior Software Developer
H2 Cognitive Designs Ltd —London
- £65,000 - £75,000 a year
- Full-time
- Hybrid work
- Computer Science
- Software troubleshooting
- Engineering
Quick apply
9d
Senior Frontend Developer
Kolleno —London
- Full-time
- Remote
- APIs
Junior / Mid-Level Full Stack Developer
NECSWS —London
- Full-time
- Remote
- Computer Science
- Engineering
- Agile
- Annual leave
Quick apply
Lead UI Developer – Single Dealer Platform (TypeScript / RxJS / React)
Bank of America —Bromley
- Full-time
- School
- Employee assistance programme
Staff Frontend Engineer
Trading212 —London
- Full-time
- Hybrid work
- Software troubleshooting
- Mentoring
2d
Senior Full Stack Engineer - Lyst Shop (11 Month FTC - Maternity Cover)
Lyst —London
- Hybrid work
- AWS
- Mentoring
- Annual leave
- Work from home
Quick apply
7d
Sr. Front-end Engineer
Galytix —London
- English
Senior Designer
AtkinsRéalis —Epsom
- Full-time
- Hybrid work
- Organisational skills
- Agile
- Communication skills
Senior Frontend Engineer, Marketing Website
Synthesia —London
- Full-time
- Hybrid work
- Communication skills
Scrum Master
AWTG —London
- Full-time
- Analysis skills
- Continuous improvement
- Communication skills

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Senior Performance Tester

IT VALLEY (LONDON) LIMITED
Egham

Quick apply

Job details

Permanent | Full-time
£40,000 - £52,000 a year

Qualifications

Technical troubleshooting
Conduct risk analysis
Software troubleshooting
Mobile applications
Test automation
Selenium
Performance testing
Business development
CI/CD pipelines
Scripting
Scrum
Jenkins
Communication skills

Full job description

Job ID: ITV/JUNE2026/01

Number of positions: 01

IT Valley (London) Limited is looking for a motivated and enthusiastic Senior Performance Tester to join our growing team. The ideal candidate will be responsible for identifying new business opportunities, building client relationships, and supporting the company’s sales growth. This role requires good communication skills, confidence in dealing with customers, and the ability to achieve sales targets.

Duties and Responsibilities:

· Design and manage the overall performance testing strategy for web and mobile applications, ensuring alignment with business and technical objectives.

· Define measurable performance benchmarks, SLAs, and success criteria in collaboration.

· Conduct load, stress, endurance, and scalability testing to evaluate application behavior under normal and peak traffic conditions.

· Validate application responsiveness, stability, and reliability to ensure optimal end-user experience.

· Prepare and present performance test results, risk assessments, and release readiness reports to leadership and clients.

· Plan and coordinate performance testing activities across sprint cycles and release schedules.

· Work closely with developers, architects, and business analysts to integrate performance requirements early in the development lifecycle.

· Analyze system architecture, infrastructure limitations, and integration dependencies to identify performance risks and capacity issues.

· Investigate bottlenecks related to application code, APIs, databases, network latency, or infrastructure constraints.

· Provide technical leadership to testing teams by reviewing deliverables, setting standards, and driving process improvements.

Act as the primary escalation point for critical performance-related concerns and support release decisions.
Promote continuous improvement by enhancing testing frameworks, methodologies, and automation practices.

Skills & Experience

· Extensive hands-on experience in performance testing of large-scale enterprise applications.

· Strong knowledge of performance engineering concepts including load testing, capacity planning, stress testing, and bottleneck analysis.

· Experience with automation frameworks and testing tools such as Appium, Selenium, Cypress, Espresso, XCUITest, or similar platforms.

· Strong programming/scripting skills in Java, Python, JavaScript, or C# for test automation and framework development.

· Experience integrating automated testing into CI/CD pipelines using tools such as Jenkins, GitLab CI, Azure DevOps, or equivalent.

· Solid understanding of distributed application architecture, APIs, databases, and system integrations.

· Hands-on experience with APM and monitoring tools such as Dynatrace, AppDynamics, Datadog, or similar solutions.

· Strong experience working within Agile/Scrum environments.

· Excellent analytical, troubleshooting, and problem-solving skills.

· Proven ability to mentor junior testers or lead performance testing teams.

Pay: £40,000.00-£52,000.00 per year

Work Location: Hybrid remote in Egham TW20 8HE

Quick apply

Refine Your Search

senior web developer jobs in london, eng

Senior Performance Tester

Senior Web & SEO Manager

Senior Product Engineer (TS/NodeJS/Vue)

Front End Developer, Officer

Senior Graphic Designer

Senior Manager, SEO & AI Search

Lead Web Developer - PHP/Laravel/Full Stack

Senior Test Analyst - C3

Senior Front-end JavaScript developer

Full Stack Developer (Flutter-focused)

Senior Software Developer

Senior Frontend Developer

Junior / Mid-Level Full Stack Developer

Lead UI Developer – Single Dealer Platform (TypeScript / RxJS / React)

Staff Frontend Engineer

Senior Full Stack Engineer - Lyst Shop (11 Month FTC - Maternity Cover)

Sr. Front-end Engineer

Senior Designer

Senior Frontend Engineer, Marketing Website

Scrum Master

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