LiveLink is an entertainment live-streaming platform where streamers and viewers connect through live streaming and chat. It delivers the same experience across three environments — Web, iOS, and Android.
Real-time performance, multi-platform, scalability, and safety — the story of launching a new platform, built in-house from scratch in 10 months, that satisfies all four axes live streaming demands at once.
StreamCo Japan is an entertainment-sector platform operator that connects streamers (creators) and viewers (fans) through live streaming. Streamers broadcast live on their own channels, while viewers cheer them on in real time with comments and reactions.
The business model is a creator-economy type. The design had to deliver, end-to-end across all three environments — Web, iOS, and Android — the virtuous cycle in which streamers' success draws viewers and viewers' support sustains the streamers.
None of these are questions of technology choice; they are business requirements tied directly to the viewing experience, streamer retention, safe operations, and global expansion. A greenfield build had to be designed to “make them all hold true at once.”
In the conversation between streamers and viewers, if even a few-second delay arises, the two-way live experience falls apart.
If the experience differs across Web, iOS, and Android, you lose user retention.
When viewers surge on a popular stream, poor design interrupts the stream and you lose the opportunity.
If operators can't keep up with age verification, reporting, and multilingual moderation, it undermines trust and compliance.
Together with StreamCo Japan, we built the streaming media, real-time communication, scalable backend, and operations admin console in-house from scratch. For the design challenge in each domain, we aimed to “make them all hold true at once” in the implementation.
React Native
React
Redux
i18next
Ruby on Rails
⚡ActionCable
⚙Sidekiq
JWT
MySQL
🔔Push notifications
AWS
This foundation continuously produces business outcomes — viewer retention, streamer retention, safe operations, and global expansion — rather than mere technical metrics.
A design that maximizes viewer immersion through low-latency streaming and real-time chat.
One-tap streaming and analytics let streamers focus on building relationships with fans.
Review queue, age verification, and multilingual management enable a safe, secure space to operate.
Support for three languages — Japanese, English, and Vietnamese — delivers a foundation ready to expand into overseas markets.