Application developer Work, Jobs in Westminster, Gtl (with Salaries)

Part-Time QA Tester – Mobile & Web Applications
Retronics Market Place Limited —London
- £25,000 - £30,000 a year
- Part-time
- Remote
- Software troubleshooting
- Communication skills
Quick apply
19h
Software Engineer, Junior / Graduate (m/f/*)
Quaisr —London
- £45,000 - £55,000 a year
- Full-time
- Hybrid work
- Software development
- Communication skills
- Annual leave
Graduate Project Manager
L&Q —London
- £31,000 a year
- Full-time
- Hybrid work
- Customer service
- Computer literacy
- Project management
- Annual leave
- Employee assistance programme
23h
Graduate Digital Marketing Executive (B2B Technical Products)
Level Developments Ltd —Croydon
- £28,000 - £32,000 a year
- Full-time
- Marketing
- Social media management
- Bachelor's degree
Quick apply
Native Mobile Application (iOS/Android) Developer - PerfectDraft
Anheuser-Busch —London
- Full-time
- AI
- Employee assistance programme
AI Builder, Emerging Talent - UK & Ireland Market
Salesforce —London
- Full-time
- Up to 50% travel
- Sales
- English
Junior Front End Developer
Byte9 —London
Web Developer Intern
AP Homes LTD —South Kensington Station
- Hybrid work
- Computer Science
- In-person
- AI
Quick apply
7d
Front-End Web Developer - 3 Month Contract
1st Formations —London
- £70,000 - £75,000 a year
- Full-time
- Hybrid work
- Communication skills
Software Developer (all levels) - Distributed Simulation Technology (UK)
BAE Systems OneArc USA, Inc —Gatwick Airport
- Full-time
- Hybrid work
- Computer Science
- Java
- Master's degree
Quick apply
4d
AI/ML Engineer
Aivra Health —London
- £27,827.24 - £35,825.62 a year
- Azure
- Computer Science
- Master's degree
Quick apply
Data Science Machine Learning Internship (Summer 2027)
Castleton Commodities International —London
- Full-time
- Analysis skills
- Maths
- Bachelor's degree
Software QA Tester
Appdrawn —Watford
- £29,000 - £34,000 a year
- Part-time
- English
- In-person
- Communication skills
- Annual leave
- Flexitime
Quick apply
UX/UI Designer
Bharat Digital Limited —London
- £43,800 - £45,000 a year
- Full-time
- In-person
Quick apply
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
Operations and Projects Executive
Le Connoisseur —London
- £30,000 - £35,000 a year
- Full-time
- Hybrid work
- Hospitality
- English
- Databases
- Work from home
- Sick pay
Quick apply
PMO (Project Management Office) – Junior/Graduate
Scrumconnect Consulting —Staines-upon-Thames
- £26,500 a year
- Contracts
- Communication skills
New Grad Full-Time Quantitative Researcher
WallStreetQuants —London
- £145,000 - £200,000 a year
- Full-time
- Remote
- Software troubleshooting
- Java
- Analysis skills
Quick apply
Contact Centre Advisor x2 – L&Q Energy
L&Q —London
- £24,545 a year
- Full-time
- Hybrid work
- CRM software
- Communication skills
- Annual leave
- Employee assistance programme
1d
Functional Tester
Code First Girls —London
- Full-time
- Remote
- Writing skills
- Communication skills
Quick apply

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Part-Time QA Tester – Mobile & Web Applications

Retronics Market Place Limited
London

Quick apply

Job details

Part-time
£25,000 - £30,000 a year
19 hours ago

Qualifications

Jira
Software troubleshooting
Mobile applications
Selenium
Software quality assurance
GitHub
Communication skills
Functional quality control testing
Mobile testing

Full job description

About the Role

Retronic Marketplace Limited is looking for a Part-Time QA Tester to help ensure the quality, reliability, and usability of our mobile applications and web platform.

You will work closely with our development team to test new features, identify defects, reproduce issues, verify fixes, and help us deliver a stable and polished experience to our users.

This is a hands-on testing role suitable for someone who enjoys finding problems before customers do and can clearly explain what went wrong, how to reproduce it, and what the expected behaviour should be.

Key Responsibilities

Test our iOS and Android mobile applications and web application.
Perform functional, regression, exploratory and usability testing.
Test new features before they are released.
Identify bugs, inconsistencies, broken workflows and usability issues.
Create clear bug reports with screenshots, videos and reproducible steps.
Verify fixes provided by developers.
Test applications across different browsers, screen sizes and mobile devices.
Check complete user journeys rather than testing individual screens in isolation.
Identify edge cases and scenarios that developers may not have considered.
Validate that existing functionality continues to work after new releases.
Work with developers to understand requirements and expected behaviour.
Help improve our overall QA and release process.

What We're Looking For

Experience testing mobile applications and/or web applications.
Good understanding of software testing and QA principles.
Strong attention to detail.
Ability to think from an end-user's perspective.
Ability to reproduce and clearly document software defects.
Good written and verbal communication skills.
Comfortable working with developers and providing clear feedback.
Able to work independently and take ownership of testing tasks.

Desirable Skills

Experience with any of the following would be beneficial but is not essential:

Jira, GitHub Issues or similar bug-tracking tools.
Postman or API testing.
Chrome Developer Tools.
Android and iOS testing.
Cross-browser testing.
Basic SQL/database knowledge.
Automated testing tools such as Playwright, Cypress, Selenium or Appium.
Testing e-commerce or marketplace applications.

What We Value

We are looking for someone who does more than simply check whether a button works.

A good QA tester should ask:

What happens if the user does something unexpected?
What happens when data is missing or incorrect?
Does this work on a different device or browser?
Is the behaviour consistent across mobile and web?
Could this change have broken another part of the application?
Would a real customer understand what they are seeing?

We value curiosity, attention to detail and a quality-first mindset.

Pay & Working Arrangement

£15.00 per hour

This is a part-time position. Working hours can be agreed based on project requirements and candidate availability.

If you enjoy finding bugs, challenging assumptions and helping build high-quality software, we'd like to hear from you.

Pay: £25,000.00-£30,000.00 per year

Work Location: Remote

Quick apply

Refine Your Search

application developer jobs in westminster, gtl

Part-Time QA Tester – Mobile & Web Applications

Software Engineer, Junior / Graduate (m/f/*)

Graduate Project Manager

Graduate Digital Marketing Executive (B2B Technical Products)

Native Mobile Application (iOS/Android) Developer - PerfectDraft

AI Builder, Emerging Talent - UK & Ireland Market

Junior Front End Developer

Web Developer Intern

Front-End Web Developer - 3 Month Contract

Software Developer (all levels) - Distributed Simulation Technology (UK)

AI/ML Engineer

Data Science Machine Learning Internship (Summer 2027)

Software QA Tester

UX/UI Designer

Senior Performance Tester

Operations and Projects Executive

PMO (Project Management Office) – Junior/Graduate

New Grad Full-Time Quantitative Researcher

Contact Centre Advisor x2 – L&Q Energy

Functional Tester

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