Hire the Best Usability Testing Specialists
in Germany

I'm a QA and UI/UX specialist with experience in manual testing, bug reporting, and usability analysis. I help ensure software quality through detailed testing and user-centered design feedback. Skilled in tools like JIRA, SQL, HTML/CSS, and Figma. I focus on clear communication, reliability, and delivering results that improve product performance and user experience.

📈 Data informed (MA in Economics) + ❤️ User Obsessed (UX Certification) + 👷‍♀️ 10+ years hands-on experience As a Product Manager with over 10 years of experience across D2C, SaaS, and two-sided platforms, UX Certification, and an MA in Economics, I work directly with founders, agencies, and cross-functional teams to guide products from discovery through launch and growth. I have led platform and integration initiatives for global health and wellness brands, hotel technology ecosystems, and marketplace environments, translating business challenges into clear roadmaps, delivery plans, and live features. I offer a balance of strategic thinking and hands-on execution to drive results. What I Help With Discovery & Optimisation • Customer & stakeholder interviews • Competitor and positioning analysis • UX audits & journey mapping • Conversion and funnel optimisation • Experiment design & rapid testing Product & Delivery • Roadmap definition & backlog structuring • Feature scoping & requirements (PRDs, specs, user stories) • Agile delivery & sprint leadership • Cross-team coordination (design, engineering, ops) • Go-to-market & launch planning Project & Operational Execution • Platform integrations & vendor coordination • Marketplace and booking flow builds • Process design & workflow optimisation • Stakeholder and partner management Real-life examples: - MedKitDoc (Germany): Took over a team weeks before a contract-critical deadline. Shipped the product on time and secured the key deal. - Amptify (USA): Repositioned a patient app into a complete B2B platform for medical professionals (teleclinic, booking, marketplace). This transformation contributed to Neurotone AI's acquisition. - Jay Shetty Genius (USA): Built onboarding and feature adoption through JTBD interviews and A/B testing. Built and managed an internal dev team. Managed migration of data and users to the new platform. - Marriott & Design Hotels (Germany): Integrated 100+ independent hotels into Marriott's global distribution ecosystem, leading onboarding, API integrations, usability testing, and training. I’ve collaborated with founders, doctors, hotel operators, and celebrities, translating vision into structured execution plans that teams can actually deliver against. Toolbox Jira • Confluence • Notion • Figma • Miro • GA4 • Hotjar • HubSpot • CRM systems • Booking engines • API integration workflows • CRS • Channel Manager • PMS I think strategically but execute operationally. If you're building, scaling, integrating, or fixing a digital product happy to jump in. Let's discuss how I can help with your product challenges and deliver results. Looking forward to hearing from you. Kasia

I identify UX issues and bugs that reduce conversion in mobile apps and websites. If users drop off, abandon flows, or get confused — I pinpoint exactly where, why, and how to fix it. I’m a product-focused QA Engineer who tests apps like a real user. I analyze onboarding, booking, checkout, and other critical flows that directly impact retention, conversion, and revenue. In my recent UX audits (including e-commerce and booking flows), I identified friction points that can reduce conversion by up to 5–15%. This directly impacts user retention, conversion, and revenue. What I do: • UX audits (conversion-focused) • Real user journey testing • Friction & drop-off analysis • Bug detection with business impact Platforms: • iOS, Android, Web Tools: • Jira, Postman, Charles Proxy I don’t just test — I help you understand why users leave and what to fix. If your product loses users — I will show you exactly where, why, and how to fix it to improve conversion.

I help teams turn complex systems into clear, usable, and accessible products. With a background in Human-Computer Systems (BSc) and several years of professional experience as a Usability Engineer, UX Researcher, and Technical Writer, I work at the intersection of UX research, frontend implementation, and content design. I have delivered UX research, usability testing, and documentation for industrial, environmental, and B2B software, including regulated and government-related contexts. My work follows established standards such as ISO 9241, WCAG, and evidence-based UX methods. What I can help you with: • UX & usability reviews (heuristic evaluation, cognitive walkthroughs) • Technical & UX writing (developer docs, user guides, microcopy) • Information architecture & content structuring • Wireframes & interactive prototypes (Figma) • Frontend support (HTML, CSS, JS, React/Next.js) • Accessibility & inclusive design audits I work bilingually in English and German and am experienced in remote, cross-functional collaboration with designers, developers, and product managers. If you’re dealing with complex software, unclear documentation, or usability issues, I can help you turn that complexity into something users actually understand and enjoy using.

Hi, thank you for visiting my profile! 👋 🏆 3+ Years of Professional Experience in QA Testing, IT, and Web/Mobile Development 📃 ISTQB® Certified QA Engineer 💻 Proven track record of delivering high-quality QA projects, web/mobile applications, and user-centric designs 📊 Expertise in Data Entry, Data Mining, Web Research, and Administrative Support 🇩🇪🇺🇸 🏆 Fluent in Turkish, English, and advanced in German ✨ OVERVIEW I’m Mehmet Baran Nakipoğlu, an experienced IT professional with a B.Sc. in Computer Engineering and currently pursuing an M.Sc. in Digital Transformation Tech. and Management in Germany. My expertise spans QA testing, Web & Mobile Development / Design, and Data Entry & Research. Over the years, I have worked in various positions and gained different skills and abilities to deliver high-quality results in diverse areas, including software testing & QA, web/mobile development and design of the UI & UX, translation of documents, data entry etc. Combining technical precision with an eye for detail, I provide tailored solutions for businesses worldwide. ✅ Expertise in: + QA Testing: Functional Testing, UI Testing, Cross-Browser Testing, Mobile Testing (iOS & Android), Usability Testing, Regression Testing, Exploratory Testing, and End-to-End Testing. + Web & Mobile Development: Responsive websites, mobile optimization, cross-browser compatibility, and front-end development with HTML, CSS, JavaScript, and WordPress. + Document Translation: Translating academic papers, technical documents, and business-related materials between Turkish, English, and German. + Data Entry & Research: Lead generation, data mining, manual data entry, LinkedIn and web research, and advanced Excel/Google Sheets usage. + Project Support: Translating daily communications and project documents to ensure seamless collaboration in international teams. ✅ Practical Skills: Expertise with Jira, XRay, Postman, and CI/CD workflows (GitLab). Skilled in UI and API testing for e-commerce, payment systems, and enterprise software. Languages: Fluent in Turkish and English, Advanced in German. 👨🏻‍💻 Whether you need an experienced QA tester, a skilled web/mobile developer, or a dedicated data entry specialist and translator for your documents and works; I bring a combination of technical expertise and attention to detail to every project. Let’s connect and make your project a success! 🚀

Your app or website will be tested—if not by me, then by your customers. Stop losing users to frustrating interfaces. I help you identify critical usability problems before they cost you conversions, customers, and credibility. 📞 Let's start with a quick call to discuss your needs and see if I'm the right fit. 🏆 WHAT I BRING TO THE TABLE Before coming to Upwork, I built one of the top usability testing services on Fiverr: - 250+ projects completed with a 5-star rating - Fiverr Pro & Fiverr's Choice — achieved every badge available - 9,000+ usability issues identified across websites, apps, and digital products - 8+ years of hands-on experience as a usability engineer Now I'm bringing that same expertise to Upwork clients who need reliable, thorough, and actionable usability insights. ⭐⭐⭐⭐⭐ "Fantastic working with Felix, really worth every penny. He found bugs in my site none of our other testers had discovered, and his documentation was top notch. We will absolutely work with him again next time we need a site tested!" — Fiverr Client 🇩🇪 NATIVE GERMAN SPEAKER — YOUR SECRET WEAPON FOR THE DACH MARKET Planning to launch in Germany, Austria, or Switzerland? This is where I truly stand out. As a native German speaker, I catch what non-native testers miss: - Chatbots & Voice Assistants: I test conversational AI in natural German, identifying awkward phrasing, cultural mismatches, and flow issues - Localization Testing: Beyond translation: I evaluate tone, formality ("Sie" vs. "Du"), cultural appropriateness, and regional expectations - German User Testing: I have access to a network of native German test participants for authentic user feedback International companies trust me to ensure their products don't just work in German—they feel German. 🔍 WHAT I OFFER - Heuristic Evaluations (Nielsen's 10 Heuristics) - Usability Testing with real users - UX Audits for websites, apps, e-commerce & SaaS - German localization and voice bot testing 🏢 INDUSTRIES I'VE WORKED WITH E-Commerce • SaaS • FinTech • HealthTech • Mobile Apps • Startups • Enterprise Software 📋 WHAT YOU RECEIVE - Comprehensive summary report with annotated screenshots and videos - Prioritized issues ranked by severity - Concrete, actionable recommendations 📅 Book a 30-minute strategy call to discuss your goals 💌 Or send me a message with your project details Let's make your product easy to use—so your customers stay, convert, and come back.