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ETHAN
@eth_cald
Mobile App Developer, UX Tester and QA
United States
English, German
About me
Hi, I'm Ethan — a passionate Mobile App Developer and App Tester with 4+ years of experience in user testing, usability testing, and website review.
I help businesses identify UX flaws and build seamless digital experiences. From detailed usability audits to full mobile app development I deliver clear, actionable results that boost user satisfaction.
My goal is simple: test like a real user, build like a pro.
Let's turn your idea into a polished product!
Skills
ETHAN
Offline •
Average response time: 1 hour
See my services
Mobile Store Management
I will do fast 5 star android app reviews and downloads
User Testing
I will beta test your app, game or website and provide feedback
Work experience
Usability Tester & Website Reviewer
Testfully • Freelance
Dec 2025 - May 2026 • 5 mos
Performed in-depth usability testing, app testing, and website review for web and mobile products. Identified UX friction points, bugs, and accessibility issues through structured test sessions and heuristic evaluations. Delivered annotated screenshots, screen recordings, and detailed written reports with fix recommendations to help clients launch with confidence.
Mobile App Developer & QA Tester
Programming Hub • Freelance
May 2025 - Sep 2025 • 4 mos
Designed and developed cross-platform mobile applications for Android and iOS using Flutter and React Native. Conducted end-to-end user testing, usability testing, and website reviews for clients across multiple industries. Delivered detailed bug reports, UX audits, and actionable recommendations that improved app performance and user satisfaction. Collaborated with startups and businesses to build reliable, scalable, and user-friendly digital products.
