Svitlana D.

**Complex WooCommerce & Dokan solutions | Custom business logic | API & AI integrations** I specialize in solving technical problems that standard plugins and ready-made solutions don't fully address. My strongest background is in WordPress, WooCommerce, and Dokan marketplaces, but my work goes well beyond traditional WordPress development. I build custom business logic, integrate external systems, develop backend services, and use AI and machine learning when they offer a practical advantage. **I focus on how the system should work — not just how to code it.** Many technical problems begin with a business workflow that doesn't fit the limitations of an existing platform. I try to understand the business owner's goals, the everyday experience of customers and vendors, and the reasons behind the requirements before choosing an implementation. For example, I've worked on adapting an existing booking platform to the specific needs of a motorhome rental business. The challenge wasn't simply connecting APIs or changing a booking form. It was understanding the rental process, optional services, pickup and return arrangements, and how to represent them within the platform's existing capabilities. The same thinking applies to marketplaces: making product listing faster for vendors, helping buyers find what they actually need, or adapting payment workflows to real business events. **What I can help you with** - **WooCommerce & Dokan:** complex marketplace functionality, custom plugins, vendor workflows, order processing, checkout customization, and business-specific logic. - **APIs & integrations:** REST APIs, webhooks, external services, data synchronization, and custom integration workflows. - **WooCommerce internals:** advanced customization of order and email lifecycles, custom `WC_Email` classes, notification routing, and email editor integrations such as YayMail. - **Backend engineering:** custom PHP functionality and Python or Node.js services integrated with existing applications. - **Applied AI & machine learning:** Gemini integrations, TensorFlow-based image matching, semantic search, fuzzy matching, and hybrid AI/business-rule solutions. - **Browser-side engineering:** camera access, barcode scanning, Canvas image processing, optimized uploads, and interactive interfaces. - **Payments & booking systems:** custom transaction workflows, Stripe Connect/Express integrations, and adaptation of existing platforms to non-standard business requirements. - **Figma & responsive interfaces:** accurate implementation of provided designs and independent creation of straightforward, functional interfaces. **Practical engineering, not technology for its own sake** I don't try to solve every problem with the same stack. Sometimes a small WooCommerce customization is the right answer. Sometimes a separate Python or Node.js service is more appropriate. And sometimes AI works best as one component of a larger system, supported by structured data and deterministic logic. I also prefer to understand an existing system before changing it. My goal is to extend working architecture through appropriate hooks, APIs, and extension points whenever possible, rather than introduce unnecessary rewrites or fragile modifications. **Independent expertise, with a team when needed** I work as part of UpSite, a small development and design team. My primary focus is engineering, integrations, business logic, and solving complex technical problems. I can handle functional interface design and Figma-based implementation independently. For projects requiring creative UI/UX design, advanced responsive layouts, or sophisticated visual work, I can involve a professional designer from our team. I also work comfortably within existing development teams and GitHub-based workflows. **The kind of collaboration I value** Many of my long-term clients have built successful online businesses, and I’m glad that my work has often gone beyond writing code. Some of the best solutions came from discussing their ideas together, identifying potential problems, and finding a better way to implement them. That's the kind of collaboration I value most.