Waseem Ullah Jan

Provided L2 escalation support for Shopify/Shopify Plus merchants; delivered storefront fixes via Liquid, HTML/CSS, and JavaScript updates. Built and extended theme components (sections, snippets, templates) to improve UX and merchandising content. Debugged complex issues (Liquid includes, app script conflicts, deprecated APIs) using Chrome DevTools, theme logs, and cross-browser testing. Integrated and validated flows using Storefront/GraphQL APIs, webhooks, and payment gateways; verified payloads and regressions in Postman/Insomnia. Authored runbooks and documented recurring fixes to improve consistency and reduce ticket reopen.

Developed and maintained core front-end modules for a nationwide POS system used by restaurants, pharmacies, and retail businesses across Pakistan. Optimized API call sequencing and implemented lazy loading, reducing initial page load time by ~30% and improving overall responsiveness. Created responsive, mobile-friendly UI components, boosting user experience by 25%+ across devices. Collaborated with backend teams to ensure accurate data flow and smooth REST API integration; improved UX by prioritizing critical API calls, enabling background loading, and implementing NGXS state management. Performed debugging, code reviews, and testing to maintain high-quality standards. Provided customer support; resolved 1,000+ issues and delivered user training.

● Worked on the frontend of ReadyToMuch, an application for online delivery service with Point-of-Sale (POS) integration for restaurants, pharmacies, and bakeries. ● Worked on the frontend of Point-of-Sale (POS) which is restaurants, pharmacies and Bakeries (Almost in all Pakistan) ○ Implemented new features to enhance application functionality. ○ Improved UX by optimizing server API calls to prioritize essential data for immediate display, with non-critical calls loaded in the background. Customer & Technical Support: ○ Troubleshooting, Debugging, and User Issue Resolution ○ Customer Communication, Training, Stakeholder Engagement ○ Help Desk & Support Tools (Zendesk, Help Scout, JIRA, Slack)