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jammark0

Mark J

@jammark0

QA Testing, Bug Fixing and CRO Expert for WordPress, Shopify and AI Apps

Nigeria
French, English, Spanish
About me
Hi there! My name is Mark James, I’m a QA testing and optimization specialist helping businesses improve websites, SaaS platforms, AI web apps, and eCommerce stores. I provide manual QA testing, bug fixing, security audits, usability testing, CRO analysis, A/B testing, mobile responsiveness checks, and detailed feedback reports. I also test and debug Lovable AI, Base44, Supabase, Replit, WordPress, Shopify, and custom web apps to improve performance, user experience, and conversions. Fast delivery, clear communication, and quality-focused results.... Read more

Skills

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jammark0
Mark J
Offline • 
Average response time: 1 hour

See my services

User Testing
I will do website beta testing, usability QA and bug mobile speed testing with feedback
From$10 / projectMore details
Development & MVP
I will debug and test lovable ai, base44, supabase and replit web apps with QA feedback
From$20 / projectMore details

Portfolio

Work experience

Website Usability Tester

Remote Beta Testing Projects • Freelance

May 2023 - Present • 3 yrs

Conducted usability testing for websites and web applications, focusing on user behavior, navigation ease, and interface clarity. Worked with early-stage platforms to ensure their products were user-friendly and ready for public release. Key Achievements: Helped improve user interface design for better engagement Identified navigation issues affecting user experience Tested mobile and desktop compatibility Delivered actionable feedback to improve conversions

Self-Employed

QA & eCommerce Testing Specialist

Self-Employed • Freelance

Mar 2023 - Present • 3 yrs 2 mos

Specialized in testing eCommerce platforms like Shopify and WooCommerce stores to ensure they are fully functional and optimized for sales. Focused on payment gateway testing, product page functionality, and performance optimization. Key Achievements: Tested and validated payment integrations (Paystack, Flutterwave) Improved store performance and loading speed Ensured error-free checkout experience Helped businesses launch fully functional online stores

QA Tester (Beta Testing & Usability)

Independent testing • Freelance

Jan 2023 - Present • 3 yrs 4 mos

Worked as an independent QA tester, helping startups and small businesses test their websites and applications before launch. Focused on identifying bugs, usability issues, and improving user experience. Performed manual testing on eCommerce stores, landing pages, and mobile-responsive websites to ensure smooth functionality across devices. Key Achievements: Detected and reported critical bugs before product launch Improved website usability and navigation flow Tested checkout systems to reduce cart abandonment Provided detailed feedback reports for developers