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I will bug fix upgrade develop cs cart e commerce multivendor XML sitemap addons
James B
About this gig
Most developers build CS-Cart stores that simply work. I build high-performance marketplaces designed to scale, convert, and increase revenue.
If your CS-Cart store is slow, difficult to manage, or your multi-vendor marketplace suffers from checkout issues, addon conflicts, or poor user experience, you're losing customers, vendors, and sales.
As a Full-Stack CS-Cart Developer, I specialize in PHP, MySQL, HTML5, CSS3, JavaScript, jQuery, AJAX, Smarty, REST API, and Git. I build, customize, and optimize CS-Cart stores for speed, security, and scalability.
What I Deliver:
- CS-Cart & Multi-Vendor Setup
- Custom Addon Development
- Theme Customization
- API & Payment Gateway Integration
- Website Migration & Upgrades
- Speed Optimization
- Bug Fixes & Database Optimization
- Technical SEO & Maintenance
Every solution is built for performance, stability, and long-term business growth, helping you increase conversions, improve user experience, and grow your marketplace with confidence.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know James B
James B
WEBSITE DESIGN EXPERT
- FromUnited Kingdom
- Member sinceMay 2026
- Avg. response time1 hour
Languages
English, Spanish
Welcome to my profile! I specialize in modern web design tailored to attract and convert customers. From full automated dropshipping store setup to complex multivendor website build projects, I handle online commerce with ease. Facing technical shifts? I execute quick website migration with zero data loss. Using essential programming languages like HTML, CSS, JavaScript, and PHP, I build custom, responsive, and secure digital platforms. Get in touch today to discuss your vision!
Other Website Maintenance Services I Offer
FAQ
Can you build a complete CS-Cart Multi-Vendor marketplace?
Yes. I can build your marketplace from scratch, configure vendors, payment gateways, shipping methods, product categories, user roles, and optimize the platform for performance and scalability.
Can you develop or customize CS-Cart addons?
Absolutely. I develop custom CS-Cart addons, modify existing modules, integrate third-party APIs, customize themes, and add features tailored to your business requirements using PHP, Smarty, JavaScript, MySQL, and the CS-Cart framework.
Can you fix bugs, improve speed, or upgrade my CS-Cart store?
Yes. I troubleshoot errors, resolve addon conflicts, optimize database performance, improve Core Web Vitals, upgrade CS-Cart versions, and ensure your store runs securely and efficiently with minimal downtime.
What information do you need before starting my project?
To get started, I'll need your CS-Cart admin access, hosting or cPanel/FTP credentials (if required), project requirements, and any design references or feature specifications. This helps me deliver the best solution quickly and accurately.
