Chapter 05 of 06 · Product Engineer arc
05 クイックプロ
QuickPro
Read the market while it moves!!
↓ Real-time trading app. Foreximf.com · freelance, remote.
- Role
- Freelance mobile engineer · team of 4
- Reach
- 100K+ downloads · 4.5★
- Period
- Jul 2022 – Apr 2023
活躍What I did
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Built Market Detector end to end on the client: a feed for reading current market information, with type filters, notifications, and charts on the detail screen.
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Laid the base for the real-time market-order flow: the trade module that hosts every trading screen, the market-execution screen, and the early trade service layer.
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Helped design the initial WebSocket approach for live trading data; teammates later built reconnect handling and further improvements on top of it.
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Wrote the trade screen's order logic: buy/sell and pending-order condition checks, and the calculator formulas.
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Made prices follow each currency pair's own number of decimal places instead of one fixed setting.
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Fixed clashes between screens listening to the same live data by adding a shared listener bridge, plus a listener bug on position history.
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Built the economic calendar: moved it to a CMS-backed API, added a timeline that scrolls to the current event, finished-event states, and deep links to a specific event.
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Built the home screen: currency flags, login dialog, and a watchlist timeframe kept in sync with the chart.
成果 Impact!!
教訓 What I learned
