Hire the Best Functional Testing Specialists
in the United Kingdom

Shipping fast is easy. Shipping fast without breaking things? That's where we come in. I'm Ajesh, co-founder of CalibreCode - a specialist QA and software testing agency with 14,000+ hours logged on Upwork, a 100% Job Success Score, and Top Rated Plus status. We've helped startups, scaleups, and enterprises across the UK, US, and India launch faster, reduce production bugs, and build release confidence. What we do: Manual & Automated Testing - thorough coverage across web, mobile, and enterprise platforms Test Automation - Selenium, Cypress, Playwright, and CI/CD integration to catch issues before they reach users Performance & Load Testing - validating that your app scales under real-world demand End-to-End QA Consulting - embedded QA strategy from sprint planning to release sign-off Clients don't just hire us to find bugs. They hire us because they want a QA partner who understands their product, integrates with their team, and takes ownership of quality, not just a checklist. We've worked across SaaS, HR Tech, RegTech, EdTech, AR/VR, and event platforms. Whether you need a dedicated QA resource, a rapid audit before launch, or a long-term testing partner, we can be up and running within days. Let's make sure your users never find the bugs we already caught.

- 10+ years of experience in Software Testing and QA. - Solid expertise in Manual Testing and Test Automation. - Vast experience in Functional, Integration, System, Compatibility, Cross-browser testing of Web and Mobile Apps. - Proficient in defining requirements, test planning, reporting issues. - Can work with teams following Agile or Waterfall approaches. - Experienced in leading teams and working with remote teams. - Clear and concise status reporting and metrics. - Proactively communicate issues and share ideas/thoughts on improvements. - Quick learner, coach and mentor. Tools: Selenium | WebdriverIO | Appium | Locust | Jira | Confluence | Quality Center | Frameworks: JUnit | TestNG | JBehave | Python PY Framework Languages: Python | Java | IBM Host On-Demand Macro Scripting Certifications: - Certified Scrum Master and AWS Certified Solution Architect. - IBM Certified DB2 Professional and TOGAF certification in 2007.

ISEB and Microsoft qualified software consultant with 14+ years experience in the industry. Background in C# for automation, building frameworks using Selenium Web Driver and SpecFlow. Have worked within different industries, across the likes of e-commerce, finance, cloud data, utilities, digital identity, education, gaming & healthcare. Throughout my Upwork career, I have worked on projects that cover UI & device user testing, localisation testing, automation and mentoring, API testing and UX testing From my well established QA career, a summary of my skills would be; - Very flexible to client needs regarding working days/hours - Highly motivated and comfortable working individually or within a team - Experienced testing applications built with a .Net framework - Experienced testing front end applications - Experienced testing APIs using Postman & ReadyAPI - Experience using Azure & Jira for for test case and defect management - UI and app testing on web and mobile - Localisation testing - Performance/Load testing with JMeter - Test Strategy/Plan building - Defect and test case management using Jira & Azure - Building automation frameworks using C# & Selenium or Playwright & Typescript - Creating CI/CD pipelines using Azure Dev Ops and GitHub Actions - Integration testing

Let’s discuss and work together on your projects! . I am a dedicated Quality analyst with Customer satisfaction as first priority. With a strong understanding of software development life cycle and hands-on in test deliveries in Agile and Waterfall , I ensure to deliver high-quality outcomes of work with integrity while maintaining good relationship with co-workers. My Skills set: • Manual Testing(Functional, System, Regression, Integration, Usability and end to end testing) • API • Performance Testing • AI Prompt Testing • Technical Documentation and Writing • Technical Support / Assistance • Project Management • Test plan • Test case design, Execution and documenting • Defect tracking and Reporting and Retest • Risk Assessment - RAIDD • Strong analytical & problem solving • Excellent communication & Team collaboration How and where I can be of help: • Analysing user stories /use cases/requirements for validity and feasibility • Execute all levels of testing (Exploratory, Regression, Smoke & Sanity, Functional, Cross browser, Performance and UAT) • Help AI apps get smarter by testing and providing feedback • Detect and track software defects and inconsistencies, bug reports with annotation • Apply quality engineering principles throughout the Agile product lifecycle • Writing Knowledge Bases and Manuals - Technical Documentation - User Guides • Provide technical support, feedback and recommendations based on best practices What I can offer for the team: • 15+ years of experience as a Software Tester (Web and Mobile) • 8+ years doing management and coordination with developers, PO and operations on a daily basis • Ability to handle multiple tasks simultaneously • Ability to work in a fast-paced environment with minimal supervision • Sense of ownership, critical thinker and problem-solving skills • Excellent interpersonal and communication skills • Team player with Good time-management skills I am very open and flexible on my approach and to discussions to meet each client's needs. Work with integrity. Deliver with quality and excellence.

I’m a detail-driven QA Software Tester and Business Systems Analyst with professional experience across software testing, systems support, and business process improvement in both freelance and organisational environments. I bring the rare combination of hands-on testing expertise and real-world systems analysis experience, meaning I don’t just find bugs - I understand how systems, users, and business processes connect. 🔍 What I Do Best Manual testing for web, mobile, and desktop applications Writing clear, reproducible bug reports with logs, screenshots, and step-by-step evidence Usability & UX feedback from a real end-user and business perspective Functional, regression, happy/sad path and exploratory testing Reviewing user journeys and identifying friction points Supporting teams with UAT, requirements validation, and system improvements 🧠 Professional Systems & Business Experience Alongside freelance QA work, I work professionally in systems and programme environments, where I: Support and improve business systems used by large organisations Work with stakeholders to understand requirements and translate them into system solutions Investigate system issues and identify root causes Contribute to process improvements and system change initiatives Bridge the gap between technical teams and non-technical users This means I naturally test software with a business analyst mindset - thinking about real users, real workflows, and real operational impact. 🛠 Tools & Platforms Jira • Figma • Android Studio • TestRail-style reporting • Slack • API & integration testing exposure Experience with structured testing approaches from platforms including uTest, UserTesting, Tester Work, and Userlytics. 📱 Test Devices Huawei P30 Pro Huawei P20 Pro iPhone XR Windows 10 Desktop 🤝 What Clients Like About Working With Me ✔ Clear communication ✔ Thorough, structured feedback ✔ Reliable turnaround ✔ Strong attention to detail ✔ Ability to think like both a tester and a business user If you need someone who can test properly, think critically, and communicate clearly with your team, I’m ready to help.

Website & App Tester | Voice Artist | UX & QA Specialist I help businesses improve their platforms through detailed testing, clear feedback, and professional voiceover work that brings projects to life. I’ve worked with clients across a wide range of industries globally, delivering reliable results and strong communication every time. --- ## **🎤 Voiceover Services** I don’t just provide a voice — I help bring your project to life with tone, clarity, and purpose. **Services include:** * Commercials * Corporate narration * E-learning * Animation **Voice styles:** * Friendly & conversational * Genuine & believable * High-energy & dynamic * Cool & modern **What you can expect:** * Fast turnaround (often within 1–4 hours) * Studio-quality audio * Background music options (royalty-free library available) * Live direction via Zoom or your preferred platform 🧪 Website & App Testing (QA / UX) I provide detailed testing and feedback to ensure your website or app runs smoothly, looks professional, and delivers a great user experience. Testing expertise: * Functional Testing * Manual Testing * Website & Mobile App Testing * Usability / UX Testing * Regression Testing * Cross-browser & device testing * Payment flow testing What I deliver: * Clear, structured bug reports with evidence * Test case creation and execution * UX-focused feedback to improve conversions * Identification of edge cases and critical issues **💡 Why Clients Choose Me** * Proven experience working with clients worldwide * Strong attention to detail and usability * Clear communication and actionable feedback * Flexible and reliable with deadlines * Focused on helping your product succeed, not just testing it 🔧 Skills Manual QA Testing • UI/UX Evaluation • Cross-Browser Testing • Mobile App Testing Test Case Design • Bug Reporting • Payment Testing • Visual QA Regression Testing • Exploratory Testing • Agile & Waterfall --- ⭐ Let’s Work Together Send me a message or invite me to your project — I’m happy to jump in, provide value quickly, and help you get the results you’re looking for. SEO Artist British Audiobook Narrator Audiobook Narrator English Audiobook Narrator British Voice Over Artist English Voice Actor UK Voice Actor British Voice Actor Male Voice Actor British Male Voiceover British Male Voice Talent UK Male Voiceover English Male Voice Actor British Voiceover British Narrator UK Voice Over Artist British Male Narrator Voice Over Voiceover UK Voice Actor English Voice Talent website tester, app tester, mobile app tester, web app tester, manual tester, QA tester, software tester, usability tester, UX tester, UI tester, QA specialist, UX specialist, QA analyst, freelance tester, remote tester, beta tester, user testing, product tester, digital tester, cross browser testing, cross platform testing, responsive testing, bug tester, bug reporting, QA testing services, usability analysis, UX audit, UI review, heuristic evaluation, accessibility testing, functional testing, regression testing, smoke testing, sanity testing, performance testing, load testing basics, test case writing, test plan creation, QA documentation, bug tracking, Jira QA, Trello QA, test reporting, QA automation basics, Selenium basics, mobile usability testing, Android app tester, iOS app tester, SaaS tester, website QA, landing page testing, ecommerce testing, Shopify testing, WordPress testing, UX feedback, UI feedback, app usability review, website usability review, QA review expert, UX research assistant, user journey testing, customer experience testing, conversion testing, CRO feedback, A/B testing support, UX improvement suggestions, UI improvement suggestions, design feedback, prototype testing, Figma testing, Adobe XD testing, wireframe testing, product feedback specialist, usability insights, QA consultant, QA freelancer, UX freelancer, usability consultant, digital product tester, interface testing, interaction testing, frontend testing, backend QA basics, API testing basics, Postman testing, QA tools expert, testing documentation, QA workflow, defect tracking, QA lifecycle, Agile QA, Scrum QA, sprint testing, QA reporting, QA metrics, QA review, QA checklist, QA validation, QA verification, QA support, QA debugging, QA issue tracking, QA bug fixing support, QA evaluation, QA feedback, QA testing expert, QA specialist freelance, QA engineer freelance, usability testing expert, UX audit expert, UX review expert, UX testing freelance, UX consultant freelance, usability tester freelance, app QA expert, website QA expert, product UGC Creator, UGC Content Creator, User Generated Content, Product Reviews, Brand Collaborations, TikTok UGC, Instagram Reels Creator, Video Testimonials, Lifestyle Content Creator, Voiceover Artist, Website Tester, App Tester, UX Tester, QA Specialist, Mobile App Reviews, Unboxing Videos, Product Demonstrations, Social Media Content, Short Form Video Creator, Authentic Brand Content, Digital Creator, Content