ericwoo_kr 
The Situation: You’re Doing SEO But You’re Not the One Deploying The most frustrating SEO situation I’ve been in wasn’t a penalty or a competitor outranking me — it was knowing exactly what needed to change on a client’s site and watching that change sit in a Jira ticket for six weeks. Schema markup for … Read more
The Real Problem: Kafka’s Ops Burden Hits You on Day 2, Not Day 1 The trap is always the same: you spin up Kafka with Docker Compose in three hours, get a producer pushing messages, feel like a genius — then Monday rolls around and you’re staring at a ZooKeeper ensemble that’s split-brained, a consumer … Read more
The Problem That Started This: Bash Was Eating My Debugging Time The script that broke me was a deployment pipeline running inside an Alpine container — 200-ish lines of Bash handling S3 uploads, config templating, and health checks. On the third “silent deploy” in two weeks, where the script exited 0 but half the files … Read more
Why I Built This Instead of Using an App The thing that finally pushed me over the edge was discovering that my CGM app stores readings in a proprietary format, exports as a PDF (a PDF), and wants $12/month to show me a 90-day trend line. That’s data my body generated. I should be able … Read more
Introduction Self-hosted VPNs have long been the go-to for folks seeking more control over their data privacy without relying on third-party services. Think of it like building your own private tunnel through the vast oceans of the internet. In 2026, with privacy concerns at an all-time high and new regulations popping up like mushrooms after … Read more
The Moment I Started Looking for Alternatives A pipeline sitting in queue for 45 minutes while we’re mid-sprint is what finally broke me. Not 5 minutes. Not 15. Forty-five minutes on a shared runner, waiting for a Docker build to start, while my team is asking if the staging deploy is done yet. That’s not … Read more
Why Binary Search Trips You Up Even After You ‘Get It’ You can whiteboard binary search perfectly. You can explain the invariant, walk through the halving logic, nail the termination condition — and then open a contest problem, stare at it for eight minutes, and submit a solution with mid + 1 where it should … Read more
The Problem: Pre-Training Is Eating Your GPU Budget I was three days into a 72-hour pre-training run on a molecular property prediction task when I checked the loss curves and realized something was deeply wrong — not with my hyperparameters, but with my entire approach. My Transformer was burning A100 time learning that atoms bonded … Read more
The Setup That Started This Comparison The number that made our finance lead go quiet was $0.10 per cluster per hour — that’s the EKS control plane fee, and it sounds trivial until you multiply it across three regions, add managed node group overhead, factor in NAT gateway egress between regions, and suddenly you’re looking … Read more
The Problem: Your Deployments Are Still Manual (And Everyone Knows It) You know the scene. It’s 11:47pm, someone from your team is SSH’d into the production server, half-following a deployment checklist that lives in a Confluence page nobody’s updated since March, and the other half going from memory. They run git pull, forget to restart … Read more