<![CDATA[Stories by The Speedcraft Lab on Medium]]> https://medium.com/@speedcraft21?source=rss-9167ac60cbd9------2 https://cdn-images-1.medium.com/fit/c/150/150/1*Dm71ADP4pd4tz73U0uKtVw.png Stories by The Speedcraft Lab on Medium https://medium.com/@speedcraft21?source=rss-9167ac60cbd9------2 Medium Thu, 05 Nov 2026 01:59:55 GMT <![CDATA[Netflix Runs 30,000 Flink Jobs, and Open-Source Autoscaling Saved One of Its Teams $1.1M a Year]]>

That team cut Flink compute 58%, and Netflix runs the scaler at 0.45 utilisation, not 0.7

Continue reading on Medium »

]]> https://medium.com/@speedcraft21/netflix-runs-30-000-flink-jobs-and-open-source-autoscaling-saved-one-of-its-teams-1-1m-a-year-0ac4012067c7?source=rss-9167ac60cbd9------2 https://medium.com/p/0ac4012067c7 Wed, 04 Nov 2026 03:31:01 GMT 2026-11-04T03:31:01.973Z <![CDATA[Netflix’s System Design Interview Was Dirty. I Wasn’t Ready.]]>

Midway through my answer, they killed an entire AWS region and watched.

Continue reading on Medium »

]]> https://medium.com/@speedcraft21/netflixs-system-design-interview-was-dirty-i-wasn-t-ready-7b9cdc5868a0?source=rss-9167ac60cbd9------2 https://medium.com/p/7b9cdc5868a0 Mon, 02 Nov 2026 03:31:01 GMT 2026-11-02T03:31:01.910Z <![CDATA[GitHub Used Copilot to Port Copilot’s Runtime to Rust: 832,000 Lines in 14.5 Weeks]]>

A cold Copilot turn fell from 5.25 s to 1.33 s out of process and 292 ms in-process.

Continue reading on Medium »

]]> https://medium.com/@speedcraft21/github-used-copilot-to-port-copilots-runtime-to-rust-832-000-lines-in-14-5-weeks-32b2b20e5949?source=rss-9167ac60cbd9------2 https://medium.com/p/32b2b20e5949 Fri, 30 Oct 2026 03:31:01 GMT 2026-10-30T03:31:01.985Z <![CDATA[GitHub’s Quietest Big Outage in August Ran 10 Hours 42 Minutes]]>

The 17 August outage hit about 29K organisations. GitHub’s own figures say the Actions incident ran longer

Continue reading on Medium »

]]> https://medium.com/@speedcraft21/githubs-quietest-big-outage-in-august-ran-10-hours-42-minutes-03bd7f9cfc90?source=rss-9167ac60cbd9------2 https://medium.com/p/03bd7f9cfc90 Wed, 28 Oct 2026 03:31:01 GMT 2026-10-28T03:31:01.709Z <![CDATA[Meta’s System Design Interview Was a Brutal Reality Check]]>

Six months of prep fell apart on one question about fan-out.

Continue reading on Beyond Localhost »

]]> https://medium.com/beyond-localhost/metas-system-design-interview-was-a-brutal-reality-check-14ac5a92b4c4?source=rss-9167ac60cbd9------2 https://medium.com/p/14ac5a92b4c4 Mon, 26 Oct 2026 03:31:01 GMT 2026-10-26T03:31:01.992Z <![CDATA[Cloudflare Moved cdnjs Off Google Cloud at 9 Billion Daily Requests and Hit Its Own Limits]]>

Paid Workers went from 1,000 subrequests to 10,000 by default, and 10 million if you opt in

Continue reading on Medium »

]]> https://medium.com/@speedcraft21/cloudflare-moved-cdnjs-off-google-cloud-at-9-billion-daily-requests-and-hit-its-own-limits-4f7ba29ab9b0?source=rss-9167ac60cbd9------2 https://medium.com/p/4f7ba29ab9b0 Fri, 23 Oct 2026 03:31:01 GMT 2026-10-23T03:31:01.653Z <![CDATA[Spotify Cut Claude Code’s File-Reading Tokens by 90% by Not Letting It Read Big Files]]>

One engineer’s test: a 350-line hook sends big reads to Gemini Flash, at 10 to 30 seconds each

Continue reading on Medium »

]]> https://medium.com/@speedcraft21/spotify-cut-claude-codes-file-reading-tokens-by-90-by-not-letting-it-read-big-files-99f079a88d99?source=rss-9167ac60cbd9------2 https://medium.com/p/99f079a88d99 Wed, 21 Oct 2026 03:31:01 GMT 2026-10-21T03:31:01.700Z <![CDATA[I Failed Google’s System Design Round Twice. Then I Cracked It.]]>

Perfect diagrams got me rejected. One shift in how I talked got me hired.

Continue reading on Beyond Localhost »

]]> https://medium.com/beyond-localhost/i-failed-googles-system-design-round-twice-then-i-cracked-it-ccf525c20449?source=rss-9167ac60cbd9------2 https://medium.com/p/ccf525c20449 Mon, 19 Oct 2026 03:31:01 GMT 2026-10-19T03:31:01.588Z <![CDATA[Spotify Doubled Merged Code Changes to 17,000 a Month With AI. Verification Became the Bottleneck.]]>

Quality work rose to 31% of merges, yet one dependency upgrade that passed every check still hurt users.

Continue reading on Beyond Localhost »

]]> https://medium.com/beyond-localhost/spotify-doubled-merged-code-changes-to-17-000-a-month-with-ai-verification-became-the-bottleneck-8b3edc933614?source=rss-9167ac60cbd9------2 https://medium.com/p/8b3edc933614 Sun, 18 Oct 2026 06:21:18 GMT 2026-10-18T07:11:58.072Z <![CDATA[Three Surprises When Reading User Input in Rust]]>

Why read_line keeps the newline, why your prompt waits for a flush, and why end of input needs its own check

Continue reading on Medium »

]]> https://medium.com/@speedcraft21/three-surprises-when-reading-user-input-in-rust-f31840899584?source=rss-9167ac60cbd9------2 https://medium.com/p/f31840899584 Fri, 16 Oct 2026 03:31:01 GMT 2026-10-16T03:31:01.775Z