Roy Mustang

Ecommerce & POS Integration Specialist

Freelance Web Designer • Freiberufler

Jul 2021 - Present • 4 yrs 10 mos

Built and optimized high-performing ecommerce systems for businesses aiming to increase sales, eliminate technical issues, and scale efficiently across multiple platforms. Worked with startups, growing brands, and established businesses to transform fragmented systems into streamlined, revenue-generating operations. Specialized in TikTok Shop setup, product listing optimization, and fixing critical errors such as product sync failures, rejected listings, and integration breakdowns that prevent stores from scaling. Implemented complete TikTok Shop infrastructures, ensuring compliance, visibility, and conversion-focused product pages. Extensive experience integrating and configuring POS systems including Shopify POS, Square POS, Clover POS, Toast POS, and Lightspeed POS. Handled full setup processes including inventory synchronization, payment gateway configuration, order management systems, and multi-channel selling to ensure seamless online and in-store operations. Designed and developed Shopify stores with a focus on user experience, mobile responsiveness, and conversion optimization. Built automation workflows and API integrations to reduce manual work, improve accuracy, and enhance operational efficiency. Resolved complex technical challenges involving third-party apps, payment systems, and backend configurations. Ensured every system is stable, scalable, and aligned with business growth goals. Consistently focused on delivering reliable, high-quality solutions that reduce errors, improve workflow efficiency, and drive measurable revenue growth for clients across different industries.