Buzzvil Engineering
Engineering decisions, experiments and lessons from building Buzzvil.
103 articles
103 results
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I built a plate solver that looks only at the arrangement of stars in a photo, works out which part of the sky it shows, and draws the constellations. It took three attempts, from a dream in 2019 to finishing it with Claude Code.
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How we separated ad allocation from hidden SDK execution and designed exposure, fallback, and session lifecycles for a recurring ad mission.
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How we handled delayed and failed video playback in WebViews—and expanded optimization from media files to the entire user experience.
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How a shift toward design work in code is changing Buzzvil’s Figma usage, handoffs and tool budget.
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Hello, I’m Simon (Sangwon Lee), a server engineer on the allocation systems team. This is part two of “What Was Filling Up MemoryDB?” Part one followed our investigation into what…
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Comparing mmap and direct embedding to remove the GeoIP database heap copy found with Pyroscope, reducing unnecessary memory use without changing deployment.
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6 months. 432 pull requests. One design team. What got better, and what it cost us. Recently, one of our designers was exploring a lucky-draw concept in the ad participation flow.…
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An investigation that began with an 85% memory alert, traced 57 million unidentified objects, and ultimately found the real cause: ghost keys.
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How we built BuzzForce, our in-house replacement for Salesforce: understanding workflows, redesigning the data model, dividing work with AI agents, and moving real business operations into the new system.
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Finding a reflection bottleneck with Pyroscope and moving to guregu/dynamo v2: 59% less CPU per request and roughly half as many HPA pods.
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As a Frenchman, I love spending time in the kitchen, cooking things for the fam. As a designer, I love crafting delightful interactions. So in the first half of 2026, I spent a cra…
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Editor’s note. The narrator of this article is not a person. It is Claude Code itself, the AI coding agent that works in Buzzvil’s web monorepo every day. Maxence, who regularly wo…