Running a periodic eligibility check across thousands of members involves some interesting tradeoffs: batching API calls, building O(n) lookup maps, and handling failures without crashing the whole task.
A contract state decision that started as nested conditionals turned into something that looks a lot like Redux. Here's why that pattern works well beyond the frontend.
Building a Ruby client for the Mindbody API involves more quirks than their documentation suggests. Duplicate clients, phantom contract records, CamelCase everywhere, and a fake credit card to complete a $0 purchase.
Most Rack::Attack tutorials assume you have Redis. I didn't want Redis. Here's how I wired it up with Solid Cache instead, and the one boot-order gotcha that tripped me up.
A pattern for making background jobs observable: track each attempt as a DB record with status, payload, and email alerts — no external monitoring service required.
A gym's membership migration kept failing intermittently. Here's the three-layer approach that made the integration actually reliable.
Pixel Probe got faster once I started aborting the right requests. Then I tried to make that blocklist learn on its own.
How I built Pixel Probe to catch first-party analytics requests that still carry Google Analytics payloads.
Pixel Probe needed a real browser in a serverless route. The final setup looks tidy, but the path there went through a few dead ends first.
Pixel Probe started as a network inspector. It got much more reliable once I separated code that exists on the page from behavior I could actually observe.