https://kimchibot.com/categories/engineering/ Recent content in Engineering on KimchiBot Hugo en-us Tue, 31 Mar 2026 00:00:00 +0000 https://kimchibot.com/posts/websocket-vs-rest-api-i-deleted-150-lines/ Tue, 31 Mar 2026 00:00:00 +0000 https://kimchibot.com/posts/websocket-vs-rest-api-i-deleted-150-lines/ I spent weeks building a WebSocket price feed. Then I realized I didn’t need it at all. https://kimchibot.com/posts/the-timezone-bug-that-cost-me-9-hours-of-trades/ Sun, 29 Mar 2026 00:00:00 +0000 https://kimchibot.com/posts/the-timezone-bug-that-cost-me-9-hours-of-trades/ My bot was missing every trade for the first 9 hours of each day. The cause? Mixing UTC and KST in one line of code. https://kimchibot.com/posts/binance-api-gotchas-that-will-waste-your-weekend/ Thu, 26 Mar 2026 00:00:00 +0000 https://kimchibot.com/posts/binance-api-gotchas-that-will-waste-your-weekend/ A collection of Binance Futures API quirks that aren’t in the documentation. Each one cost me hours. https://kimchibot.com/posts/the-3am-bug-pid-lockfiles-and-duplicate-processes/ Tue, 24 Mar 2026 00:00:00 +0000 https://kimchibot.com/posts/the-3am-bug-pid-lockfiles-and-duplicate-processes/ My bot was running twice. Two instances, same account, doubling every order. Here’s how PID lockfiles saved me. https://kimchibot.com/posts/what-happens-when-your-bot-crashes-at-3am/ Sun, 22 Mar 2026 00:00:00 +0000 https://kimchibot.com/posts/what-happens-when-your-bot-crashes-at-3am/ Your bot will crash. At night. On a weekend. With open positions. Here’s how to make sure it recovers gracefully.