--- title: "Nandan Kumar (@sirius93) | Hashnode" description: "Software Engineer • Mentor • Tech Speaker. Read the latest articles by Nandan Kumar on Hashnode." url: "https://hashnode.com/@sirius93" --- @sirius93 # Nandan Kumar @sirius93 · Bangalore, India · Joined May 2022 Software Engineer • Mentor • Tech Speaker [Website](https://nandan.dev/) ### [Mystery aocr.org Traffic Is Likely Crawlers](https://blog.nandan.dev/mystery-aocr-org-traffic-is-likely-crawlers?utm_source=hashnode&utm_medium=feed) If you have noticed a burst of visits with the referrer www.aocr.org in GA4, PostHog, Plausible, Umami, Fathom, or Cloudflare, you are not alone. The short version: the referrer is forged. AOCR is not 4 min read · [blog.nandan.dev](https://blog.nandan.dev/mystery-aocr-org-traffic-is-likely-crawlers?utm_source=hashnode&utm_medium=feed) [1d ago](https://hashnode.com/posts/mystery-aocr-org-traffic-is-likely-crawlers/6af3e5971732b9b8b7551ee8) ### [I Added a CDN, and My Cloud Bill Went Up 15x](https://blog.nandan.dev/i-added-a-cdn-and-my-cloud-bill-went-up-15x?utm_source=hashnode&utm_medium=feed) I built Cloud Cost Compute, an open-source way to estimate cloud costs across Google Cloud, AWS and Azure before you commit. 4 min read · [blog.nandan.dev](https://blog.nandan.dev/i-added-a-cdn-and-my-cloud-bill-went-up-15x?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/i-added-a-cdn-and-my-cloud-bill-went-up-15x/6aeae2cfce10b5da79621903) [Nov 4](https://hashnode.com/posts/i-added-a-cdn-and-my-cloud-bill-went-up-15x/6aeae2cfce10b5da79621903) ### [What I Built in the Last Year: A List of Failures](https://blog.nandan.dev/what-i-built-in-the-last-year-a-list-of-failures?utm_source=hashnode&utm_medium=feed) 4 web apps, 3 open source tools, one book, 250+ users, and 25 dollars. An honest look at the gap between shipping things and getting paid for them. 5 min read · [blog.nandan.dev](https://blog.nandan.dev/what-i-built-in-the-last-year-a-list-of-failures?utm_source=hashnode&utm_medium=feed) [5](https://hashnode.com/posts/what-i-built-in-the-last-year-a-list-of-failures/6ac302b7e27a522dc07fbe16) [Oct 5](https://hashnode.com/posts/what-i-built-in-the-last-year-a-list-of-failures/6ac302b7e27a522dc07fbe16) ### [Dock: Stops Letting Google Meet Links Open a New Window Every Time](https://blog.nandan.dev/dock-stops-letting-google-meet-links-open-a-new-window-every-time?utm_source=hashnode&utm_medium=feed) I have three Google Workspaces, and every link opens in a new PWA window. So I built Dock, a Chrome extension that routes links into the window you already have open. 3 min read · [blog.nandan.dev](https://blog.nandan.dev/dock-stops-letting-google-meet-links-open-a-new-window-every-time?utm_source=hashnode&utm_medium=feed) [Sep 25](https://hashnode.com/posts/dock-stops-letting-google-meet-links-open-a-new-window-every-time/6ab626ca8177246ee3cb917d) ### [Introducing COPE: Create Once Post Everywhere](https://blog.nandan.dev/introducing-cope-create-once-post-everywhere?utm_source=hashnode&utm_medium=feed) An open-source agent that turns one rough note into ready-to-post content for LinkedIn, X, Instagram, and Threads. 2 min read · [blog.nandan.dev](https://blog.nandan.dev/introducing-cope-create-once-post-everywhere?utm_source=hashnode&utm_medium=feed) [Sep 18](https://hashnode.com/posts/introducing-cope-create-once-post-everywhere/6aace0058b8cde890340e469)