Christian Budi Harianto Simanjuntak

Senior WordPress Developer and full-stack web developer with 12+ years of experience building, redesigning, optimizing, and maintaining responsive, secure, scalable, SEO-friendly websites. Contributed to 300+ WordPress websites across international teams and multiple industries, with deep expertise in custom themes and plugins, WooCommerce, API integrations, performance engineering, technical SEO, and remote delivery.

WordPress Developer - Montgomery Steele - California, United States - Part-time Remote

(2024-08)

• Partner with digital marketing and content teams to build, optimize, and maintain SEO-focused WordPress websites and conversion-oriented landing pages.
• Develop and customize themes, plugins, forms, templates, and reusable page components for campaign and lead-generation requirements.
• Implement technical SEO improvements including structured data, crawl-error resolution, metadata, internal linking, site-speed optimization, and Core Web Vitals enhancements.
• Monitor website performance through Google Analytics and Google Search Console while troubleshooting WordPress, hosting, security, plugin, and frontend issues.

Full-Stack Website Developer - Finext - Israel - Full-time Remote

(2025-12 - 2026-07)

• Built a multilingual Hebrew/English WordPress platform with RTL/LTR layouts, WPML, ACF, Custom Post Types, AJAX search/filtering, frontend submissions, role-based permissions, and a custom PDF.js/Turn.js viewer.
• Built and maintained a WooCommerce integration synchronizing SAP/API product data across products, variations, categories, attributes, images, SKUs, statuses, and custom metadata for datasets of approximately 2,000-10,000 records.
• Developed a multilingual marketing platform using Next.js, React, TypeScript, Tailwind CSS, and next-intl, including SEO metadata, structured data, canonical URLs, analytics, and lead-generation integrations.
• Built features for a volunteer-management application using Node.js, Express, MongoDB, Redis, React, Next.js, REST APIs, Persona, HubSpot, SendGrid, Azure services, testing, CI workflows, and Docker.

Senior WordPress Developer - RunCloud - Selangor, Malaysia - Remote Contract

(2025-11 - 2026-01)

• Built and maintained RunCache, a WordPress full-page caching plugin covering backend caching logic, CDN integrations, Redis support, WP-CLI operations, multisite compatibility, configuration security, and Vue 3 administration features.
• Implemented cache purge/preload workflows and integrations for Cloudflare, BunnyCDN, Nginx, Apache, Redis, FastCGI, LiteSpeed/OpenLiteSpeed, and RunCloud-managed environments.
• Delivered measured performance gains including TTFB reduction from ~2.1s to ~0.3s, ~73% fewer origin queries, ~94% Redis cache hit rate, and page-load improvements of up to ~80%.

WordPress Developer - Cool Code Sdn Bhd - Johor Bahru, Malaysia - Full-time Remote

(2019-11 - 2025-12)

• Designed, developed, launched, and maintained 200+ WordPress websites across corporate, media, recruitment, booking, e-commerce, marketing, and digital-catalog use cases.
• Converted Figma, Adobe XD, Sketch, and PSD designs into custom WordPress websites and developed custom themes/plugins using PHP, JavaScript, HTML, CSS, ACF, and Custom Post Types.
• Managed RunCloud servers, technical SEO, caching, CDN, Core Web Vitals, security, migrations, backups, maintenance, and production troubleshooting.
• Led full-cycle projects from consultation and requirements gathering through development, deployment, and long-term support with distributed teams.

WordPress Developer - Harnods - Jakarta, Indonesia - Part-time Remote

(2021-04 - 2024-12)

Designed and launched 12+ custom WordPress websites; built themes/plugins, integrated third-party APIs, and handled technical/on-page SEO, Core Web Vitals, QA, deployment, and maintenance.

Senior Graphic Designer & Website Developer - Unclezam Holding Berhad - Johor Bahru, Malaysia - Full-time Remote

(2014-04 - 2021-12)

Combined WordPress development, UI/UX, graphic design, SEO, and digital marketing to deliver websites, brand assets, and campaign materials while collaborating with cross-functional remote teams.

Diploma - Information Management - AMIK Medicom