From the dev team
Engineering
Newest first
Newest engineering notes from the Rejourney team.
6 articles
August 01, 2026 · 12 min read
Rejourney Flutter SDK Is Now in Open Beta
How we built session replay to support Flutter GPU and Impeller on iOS and Android with performance in mind.
May 06, 2026 · 8 min read
How We Keep Mobile Session Replay 17× Cheaper Than PostHog
The specific engineering decisions and great GDPR providers.
May 05, 2026 · 12 min read
Rejourney Swift Package Is Now in Open Beta
The session state machine, two start paths, URLProtocol swizzle, visual capture backpressure, ANR ping-pong, and crash recovery checkpoints — how the native iOS SDK actually works.
Apr 23, 2026 · 9 min read
Rejourney Hits 1.3 Million Session Replays in 3 Months
Lessons in edge security, durable pipelines, and scaling during a 10x traffic spike.
Feb 17, 2026 · 4 min read
120Hz Map Performance: Hooking Native SDKs
Solving micro-stutter on Apple Maps, Google Maps, and Mapbox via delegate swizzling.
Feb 06, 2026 · 8 min read
Rejourney Architecture
How we achieved pixel-perfect replay with 3 FPS and zero main-thread impact.