tag: pipeline

5 posts

all identity pipeline flags sdk replay deep dive product

24 Jun 2026 · 6 min read

One door in: why every event takes the same path

Fifteen years of building products leave you with scars, and ours all share an origin: data that entered a system through more than one door. This is the story of why Kilden only has one.

pipeline deep dive

Many tangled glowing paths converging into a single luminous doorway and emerging as ordered parallel lanes

10 Jun 2026 · 3 min read

Feature flags that target what users did

Who decides which users see your new feature? In Kilden, a hash function — with no memory, no assignment table, and no way to disagree with itself. And because flags sit on an event pipeline, they can target behavior, not just attributes.

flags pipeline

13 May 2026 · 3 min read

Kafka never carries blobs: session replay as a claim check

For a while, some of our session replays played back as minutes of black screen. The recordings were fine. The bug was in a filename — and the fix is a rule about key design worth stealing.

replay pipeline deep dive

29 Apr 2026 · 3 min read

One pipeline, four products

Your analytics tool and your email tool disagree about what a user did today. Only one of them is wrong — good luck finding out which. Kilden's answer is structural: four products that physically cannot disagree, because they read the same stream.

pipeline deep dive

15 Apr 2026 · 3 min read

Exactly-once-ish: the delivery guarantees we actually promise

Ask a queue vendor for exactly-once delivery and watch the asterisks multiply. It doesn't exist — but exactly-once effects do, and the whole trick is three decisions about where duplicates go to die.

pipeline deep dive

$ npm install kilden

Build your data pipeline in two minutes

Analytics, feature flags, campaigns and session replay — one event pipeline, one SDK. Free to start.

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