A cross-platform trading application built for active retail traders — real-time market data, ML-driven signals, sub-100ms order execution, and a UX that earned a 4.9★ store rating across iOS and Android.
The client needed a mobile-first trading platform that could compete with Robinhood on UX, with Bloomberg on data fidelity, and with institutional terminals on execution speed — across both iOS and Android, in regulated jurisdictions.
We built it in 7 months with a 6-engineer team, shipped to a 10K beta, then opened to a public waitlist that crossed 80K signups in the first month.
WebSocket fan-out, order routing layer, market-data aggregation, idempotency model — designed in three weeks.
Two squads, shared design system, identical feature parity. No "phase 2" UX gaps.
Five strategy models trained on 8 years of historical data. Backtested, paper-traded, then production-shadowed for 6 weeks.
KYC/AML, trade reporting, PDT enforcement — built to pass regulatory review on day one.
10K closed beta, then public launch. Waitlist crossed 80K in 30 days. Net Promoter Score: 71.