On Hold
WhatsApp
Cross-platform messaging app development with real-time capabilities.
32
Max participants, no loss
+55%
Call stability on cellular
<80ms
Audio latency p95
−20%
Battery use during calls
01
Problem
End-to-end encrypted group calls with more than 8 participants experienced audio degradation and frequent drop-outs, particularly on cellular networks.
02
Solution
Implemented adaptive bitrate encoding, introduced a selective forwarding unit (SFU) architecture to reduce bandwidth per participant, and added network-aware quality switching.
03
Timeline
Audio Profiling
Sep 2024
SFU Architecture Design
Oct 2024
Adaptive Bitrate Build
Nov 2024
Network Simulation Tests
Dec 2024
Beta Rollout
Jan 2025
04
Results
- Group call stability improved by 55% on cellular
- Supports up to 32 participants without quality loss
- Audio latency reduced to under 80ms p95
- Battery consumption during calls dropped 20%
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