https://blog.frank-zhang.com/tags/cloudflare-workers/Recent content in Cloudflare Workers on Frank Zhang | AI & IHugo -- gohugo.ioen-us© 2026 Frank ZhangSun, 30 Aug 2026 00:00:00 +0000https://blog.frank-zhang.com/blog/esign-architecture-serverless-platform/Sun, 30 Aug 2026 00:00:00 +0000https://blog.frank-zhang.com/blog/esign-architecture-serverless-platform/<blockquote><p><strong>Abstract</strong>: This article presents a complete guide on building a 100% cloud-hosted, enterprise-grade e-signature platform rivaling DocuSign and Adobe Sign from scratch using <strong>Cloudflare Workers</strong>, <strong>Cloudflare KV</strong>, <strong>pdf-lib</strong>, <strong>@signpdf</strong>, and an <strong>Actalis commercial-grade PKCS#12 digital certificate</strong>. The system features 24/7 sub-second global responsiveness, 2048-bit RSA cryptographic tamper-proof signatures, automated Certificate of Completion audit trail generation, custom passcode locks, and instant email delivery capabilities—all at zero infrastructure cost.</p> </blockquote><hr> <h2 class="relative group">📌 1. Project Background &amp; Pain Points <div id="-1-project-background--pain-points" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#-1-project-background--pain-points" aria-label="Anchor">#</a> </span> </h2> <p>In modern commercial operations and highly regulated industries (such as insurance, finance, taxation, and legal sectors in North America), electronic signature of contracts and policies is a core requirement. However, relying on mainstream commercial e-signature platforms (e.g., DocuSign, Adobe Sign, OneSpan) poses several key challenges:</p>