Problem
A social and chat platform offered a Flutter SDK that third-party teams embedded in their own apps. It trailed the native SDKs on features, and integrating it was slow — the exact combination that makes developers abandon an SDK.
Solution
Treat the SDK as a product, with developers as its users. Identify the functionality gaps that actually blocked adoption, prioritise them against real client needs, and make the integration path itself something worth optimising.
Technical challenges
- The SDK ships inside other people's apps, so API stability and backward compatibility were non-negotiable.
- Real-time features (messaging, feeds, reactions) had to stay reliable across flaky networks and app-lifecycle transitions.
- Client teams around the world needed fast, credible integration support.
Architecture decisions
- Designed a clean, predictable public API that hid real-time complexity (WebSocket and message transport) behind ergonomic surfaces.
- Delivered targeted parity features — live collections, follow/unfollow, content moderation — mapped to concrete client use cases.
- Built a support loop with a 2-day turnaround SLA, backed by documentation that reduced repeat questions over time.
Business impact
Integration friction is the difference between an SDK that gets adopted and one that gets worked around. Reducing it directly grew usage and lowered support load.
Results
- Native/Flutter feature-parity gap closed from 50% to 25%.
- 2-day integration-support SLA held for client teams worldwide.
- Faster, smoother client integrations and fewer support tickets.
Lessons learned
A developer-facing SDK is a product, and its UX is the integration experience. Feature parity gets you considered; ergonomics and support get you adopted.