Seydi S.

Senior WordPress Developer | Custom Builds, Performance & Support

Top 1% Upwork Developer (Expert-Vetted) | 100% Job Success | $200K+ Earned. 14 years of WordPress experience. I fix broken WordPress sites, build ones that convert, and solve the technical problems other developers give up on. Trusted by Harvard Business School, Calendly, and businesses across healthcare, law, real estate, SaaS, and e-commerce. I've been a freelancer on Upwork for 10 years. Your website is often the first interaction someone has with your business. It should build trust, communicate your value, and turn visitors into customers. Whether you need a new site built, an existing one maintained, performance optimized, or a stubborn bug fixed, I deliver WordPress work built to last. What I Do Best 🛠️ Custom WordPress Development Custom WordPress websites Website redesigns and rebuilds WooCommerce development and customization Custom functionality and third-party integrations 🔧 Complex Troubleshooting Plugin and theme conflicts PHP, JavaScript, database, and server issues WooCommerce bugs Technical issues other developers couldn't solve ⚡ Performance & Technical Optimization Core Web Vitals & PageSpeed optimization Database optimization Website migrations Security hardening and malware cleanup Technical SEO I work with custom WordPress themes as well as Elementor, Beaver Builder, Divi, and WPBakery. My technical toolkit includes PHP, MySQL, JavaScript, jQuery, WooCommerce, Gravity Forms, hosting, DNS, responsive CSS, website security, migrations, and technical SEO. I also build and maintain sites on Squarespace, including newsletter and email marketing integrations. For custom web applications, I work with Next.js, React, and TypeScript. Before going full-time freelance, I was Website & Client Coordinator at DoorGrow, a marketing agency for property management companies, managing a portfolio of 60+ client websites and coordinating projects between clients and developers. I hold a Bachelor of Science in Computer Science and a Master of Science in Technological Entrepreneurship from Northeastern University. ⭐ What Clients Say "Seydi is top-notch. One of the best freelancers I've ever worked with! He is extremely responsive, and his work on my WordPress site was high-quality. After the successful completion of this project, I can't wait to hire him again." — Dave Anderson, Harvard Business School "Seydi did an exceptional job on my WordPress migration project. What was scoped as a 1–2 week project was completed in under 24 hours, and done correctly." — Erin Monahan "Seydi is super smart and laser-focused on what needs to be done. I had a difficult coding issue, and he was able to solve it quickly where others couldn't." — Harry Schechter "Seydi is wonderful to work with. He knows what he's doing, and his communication is top-notch." — Jule Kucera 📩 Let's discuss your project. Whether it's a new website, ongoing maintenance, expert support, performance improvements, or a difficult WordPress issue, I'd be happy to help.