Prop Trading Platform

Overview

TradersFlow is a multi-sided fintech platform where retail traders prove their edge through paid evaluation challenges and earn real funded accounts. Built the entire backend engine (AdonisJS/TypeScript), a C# microservice wrapping the native MT5 Manager SDK, and two React dashboards, one for traders, one for ops. The system handles the full lifecycle: challenge purchase → MT5 account provisioning → real-time PnL tracking → pass/fail evaluation → payout. Four payment gateways. Multi-phase challenge modes. An AI recommendation engine. Health monitoring with crash alerting. All in production, serving live traders.

What I Built

• Built a C# / .NET 7 microservice wrapping the MT5 Manager SDK via P/Invoke, singleton connection management, semaphore-bounded batch concurrency, AppDomain-level crash handlers, and a /health endpoint consumed by an external Node.js poller
• Engineered an AdonisJS TypeScript backend with 150+ REST API endpoints covering challenge lifecycle, MT5 account provisioning, multi-gateway payment processing, affiliate commissions, KYC, and admin operations
• Designed and implemented FlowAI, a configurable tag-based recommendation engine matching trader profiles to challenge products, fully admin-configurable with zero redeployment needed
• Built a real-time health monitoring system: 5-min Node.js polling of the C# service, consecutive-failure threshold alerts, 30-min cooldown, and recovery email notifications via SendGrid
• Diagnosed and resolved a production accounts page regression where a dropped ORM filter (.where status 1) caused full-table scans on a large MT5 replica dataset and crashed the challengeRules getter simultaneously
• Integrated four payment gateways, Stripe (cards), Eeziepay (SEA bank transfer), Confirmo (crypto), Multichain (blockchain withdrawals), with full webhook handling and signature verification
• Maintained two React 19 / TypeScript / Vite dashboards (trader + admin) with Zustand + React Query state management and Recharts visualizations

Key Achievements

• +C# microservice achieved ~175ms p50 latency vs ~443ms on legacy MT5 Web API, 2.5× faster
• +Single root cause, two bugs: missing ORM filter caused both a production crash and a full-table performance scan
• +FlowAI replaced hardcoded if/else product matching with a DB-driven tag scoring system, rule changes require zero code deployment
• +Crash alerting for a Windows-hosted .NET service with no existing monitoring, built at AppDomain level with external Node.js health polling
• +Production fintech platform serving live funded traders across Southeast Asia

Technologies Used

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