CodeLamda's founder was part of the mobile engineering team behind BritBox, the BBC and ITV streaming joint venture. The work covered the React Native client shipped to iOS and Android — playback, DRM, offline downloads, subscription and entitlement flows — for an audience spanning multiple countries, devices and network conditions.
A streaming client is deceptively hard: DRM-protected playback behaves differently on every OS version, adaptive bitrate has to degrade gracefully on poor mobile networks, offline downloads must survive app kills and storage pressure, and entitlement checks have to be correct on every launch without adding startup latency. All of it had to ship on a single shared codebase across iOS and Android, at a scale where a regression reaches millions of subscribers before a fix can be rolled out.
A React Native client with native modules where the platform demanded them — DRM and the player were bridged to native rather than forced through JavaScript. Downloads were built as a resumable queue with explicit storage accounting; entitlement state was cached with a fast-path check on launch and reconciled in the background; and release risk was managed with staged rollouts and crash-rate gates so a bad build could be halted before it reached the full subscriber base.
Mobile app development
Cross-platform compatibility
Seamless streaming experience
User interface optimization
Content delivery integration
Ensuring consistent mobile app performance across iOS, Android, and various device specifications.
Developing adaptive streaming solutions to maintain quality viewing experiences across varying network conditions worldwide.
Building robust content delivery networks to handle peak viewing times without buffering or quality degradation.
Creating interfaces that could be easily localized for different regions while maintaining brand consistency.
Implemented two-week sprint cycles with continuous integration to rapidly deploy and test new mobile app features across platforms.
Leveraged React Native to maximize code reuse while fine-tuning platform-specific components for optimal performance.
Conducted extensive user testing across target markets to refine navigation patterns and content discovery flows.
Implemented comprehensive analytics and crash reporting to quickly identify and resolve issues affecting user experience.
BritBox is a subscription streaming service from BBC and ITV serving millions of subscribers across the US, UK, Australia and other markets. The mobile client is a single React Native and TypeScript codebase for iOS and Android that bridges the player and DRM to native modules, backed by a set of streaming platform services for catalogue, entitlement, playback licensing and adaptive delivery through a global CDN. This hybrid shape kept feature velocity high in shared code while leaving playback, downloads and content protection in the native layers that handle them reliably.
One React Native codebase ships to iOS and Android, with native modules for the player, DRM and background downloads.
An API gateway fronts the platform services, and a dedicated license endpoint issues DRM keys only to entitled, authenticated devices.
Backend services expose the catalogue, manage subscriptions and entitlements, and track playback state across devices.
Catalogue and account data are stored centrally with heavy caching, while playback analytics and crash telemetry flow to monitoring.
Content is encoded into adaptive bitrate ladders, protected with per-platform DRM and distributed through a global CDN.
Two-week sprints with continuous integration, staged store rollouts and crash-rate gates control the blast radius of each release.
On launch the app uses its cached entitlement for a fast start, then reconciles subscription state with the server in the background.
The home screen loads from the catalogue service through the gateway, with artwork served from the image CDN.
When the user presses play, the client requests a playback token and the native DRM module fetches a FairPlay or Widevine license.
The native player streams the adaptive bitrate manifest from the CDN, stepping quality up or down as network conditions change.
Playback progress is reported periodically so the user can resume on another device.
For downloads, the queue fetches segments and a persistent offline license, surviving app kills and honouring storage limits.
Crash and playback telemetry stream back to monitoring, where crash-rate gates can halt a staged rollout.
DRM behaves differently on every OS version, so forcing it through JavaScript would have been fragile. Bridging the player and content protection to native kept playback reliable while the rest of the app shared one codebase.
Checking subscription state on every launch adds latency and fails offline. A fast-path cached check with asynchronous reconciliation kept startup quick without letting lapsed subscribers play indefinitely.
Offline viewing is a core promise for commuters and travellers. Modelling downloads as a persistent queue with explicit storage budgets meant interrupted downloads resumed and the app never silently filled a device.
At millions of subscribers a regression spreads faster than a hotfix. Percentage rollouts tied to crash-rate thresholds let a bad build be halted before it reached the full base.
“The development team's expertise was crucial in bringing BritBox to a global audience.”
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