Usama Ullah Khan

WordPress Developer with 6+ years of professional experience building, customizing, and maintaining WordPress websites, custom themes, and plugins for enterprise, e-commerce, and service clients across international markets. Strong hands-on expertise in PHP, Advanced Custom Fields (ACF), Custom Post Types and Taxonomies, WordPress hooks, actions and filters, Elementor, WPBakery, WooCommerce, WPML, and Shopify/Liquid theme development.

Converts

Figma and PSD designs into responsive, cross-browser websites with HTML5, CSS3, JavaScript, jQuery, and Bootstrap, and implements AJAX-driven functionality without full page reloads. Skilled at troubleshooting and debugging WordPress and frontend issues, improving site performance and Core Web Vitals, delivering SEO-friendly markup and client projects on schedule.

UI/UX Engineer - KoderLabs - Karachi, Pakistan

(2020-07 - 2026-07)

• Develop, customize, and maintain WordPress websites end-to-end for enterprise, e-commerce, restaurant, and service-based clients in international markets, owning delivery from design handoff through launch and post-launch support.
• Build custom WordPress themes and child themes in PHP, structuring template hierarchies, reusable template parts, and theme functions to keep client sites maintainable and update-safe.
• Extend WordPress core behaviour with hooks, actions, and filters, and develop custom plugin and functions.php functionality to deliver requirements that off-the-shelf plugins could not cover.
• Model content architecture with Advanced Custom Fields (ACF), Custom Post Types, Custom Taxonomies, and repeater and flexible-content layouts, and deliver multilingual builds with WPML, giving non-technical clients fully editable, translated pages without developer involvement.
• Build and customize page-builder layouts in Elementor and WPBakery, including reusable sections, custom widgets, and builder-compatible templates aligned to approved designs.
• Develop and maintain WooCommerce stores: product, cart, and checkout template overrides, custom product layouts, shipping and payment gateway configuration, and order-flow troubleshooting.
• Convert Figma and PSD designs into pixel-accurate, fully responsive interfaces with HTML5, CSS3, JavaScript, jQuery, and Bootstrap, and add AJAX-driven filters, load-more listings, and form submissions that update content without full page reloads.
• Diagnose and resolve production issues across WordPress sites - plugin and theme conflicts, PHP errors, broken migrations, layout regressions, and update failures - using debug logs, staging environments, and browser developer tools.
• Optimize site performance and Core Web Vitals through image and asset optimization, script deferral and minification, caching, database and plugin cleanup, and code refactoring, improving load times on client sites.
• Deliver SEO-friendly development with semantic HTML, clean heading structure, optimized metadata, and technical SEO fixes coordinated with marketing stakeholders.
• Build and customize Shopify stores and themes with Liquid, including landing pages, product pages, and reusable UI sections and blocks.
• Collaborate with designers, back-end developers, QA engineers, and the e-commerce team, translating requirements into technical tasks and delivering projects on schedule.

Bachelor of Science in Computer Science (BSCS) - Computer Science - Ilma University, Karachi (2016 - 2022)

H.S.S.C (Pre-Engineering) - Pre-Engineering - Comprehensive College, Karachi (2012 - 2014)