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Writing

Every long read on the site, newest first.

  1. Cloudflare Tunnel, End to End: How a Laptop Under My Desk Serves the Internet Without a Single Open PortEverything about Cloudflare Tunnel: why outbound-only works, what cloudflared actually does, how the edge finds your connector, HA, Access and private networks, a troubleshooting map, the alternatives, and the honest tradeoffs.DispatchesOct 10 2026
  2. Intersection of Two ChainsTwo paths that merge share a tail. Find the first shared node with a set, or with two pointers that swap starts.3 problemsDSA ChainsSep 22 2026
  3. Rebuilding a NumberTwo lines of arithmetic - peel the last digit off, append a digit on - and a choice of base. Every problem here is those two lines wearing different clothes.15 problemsDSA ChainsSep 22 2026
  4. Lowest Common AncestorOne question - where do the paths to two nodes split - answered with steadily less information about the tree.9 problemsDSA ChainsSep 20 2026
  5. Two SumThe hash map is the right answer exactly once. Every later question in this family takes away the thing that made it right.15 problemsDSA ChainsSep 20 2026
  6. Deploying a Self-Hosted Temporal Cluster with mTLS, Auto-Renewing Certs and an SSO-Protected UIStanding up Temporal on a single EC2 box: workers authenticated over mutual TLS with self-renewing certs, an SSO-protected dashboard and exactly one inbound port open.DispatchesAug 02 2026
  7. Dispatch 001: the hub is openDispatchesAug 01 2026