Modern trading platforms rely on a combination of fast, reliable connectivity to liquidity providers and robust backend APIs for traders and administrators. Fintechee’s FiSDK was designed to bridge the complexity of these systems, providing a simple, accessible interface for managing trading operations and platform interactions. Understanding the architecture of FiSDK helps explain how it simplifies backend workflows and empowers both technical and non-technical users.

Fintechee’s FIX-Based LP Connectivity

At the core of any trading platform is connectivity to liquidity providers (LPs). Fintechee uses the FIX protocol, a standard in financial trading, to connect with multiple LPs. FIX ensures fast, secure, and reliable transmission of trading instructions, market data, and confirmations.

However, while FIX is highly efficient for automated systems, it is often too low-level and technical for most traders or administrators to interact with directly. Raw FIX messages require careful parsing, sequencing, and error handling—tasks that can be cumbersome and error-prone for non-technical users.

REST APIs for Traders and Administrators

To make trading backend management more accessible, Fintechee exposes functionality through REST APIs. These APIs allow traders and administrators to query account data, manage orders, monitor positions, and configure platform settings.

While REST APIs are easier to work with than raw FIX, the sheer number of endpoints, asynchronous events, and dependencies can still overwhelm non-technical users. Users may struggle to combine multiple REST calls, track state changes, or implement real-time event handling.

How FiSDK Aggregates and Abstracts APIs

FiSDK solves this problem by aggregating and abstracting both FIX and REST APIs into a clean JavaScript interface. Instead of requiring users to make multiple REST calls or handle raw FIX messages, FiSDK provides:

• Simple API functions, e.g., fisdk.some_api(params)

• Event subscription mechanisms, e.g., fisdk.subscribeToNotification("event_name", callback)

This approach hides the complexity of the underlying backend and exposes only the relevant operations and events in a user-friendly manner.

Internal Workflow Between FIX, REST, and FiSDK

The internal workflow can be summarized as follows:

1. Liquidity Providers → FIX API: Trades, market data, and confirmations are received via FIX.

2. Backend → REST API: Backend services expose trading and management endpoints for users.

3. FiSDK → JavaScript Interface: FiSDK aggregates REST endpoints, translates asynchronous events, and exposes them through a simple, event-driven JavaScript API.

This layered approach ensures that users can interact with the platform in a natural, high-level way, without worrying about low-level message handling or backend intricacies.

Benefits for Platform Operators and Traders

FiSDK’s architecture offers several key benefits:

• Simplicity: Users interact with a single JavaScript interface instead of dozens of REST endpoints or raw FIX messages.

• Real-Time Responsiveness: Event-driven subscriptions handle asynchronous operations efficiently.

• Accessibility: Non-technical traders can perform complex operations, such as risk monitoring or custom dashboards.

• Scalability: Developers can extend the interface and integrate custom frontend tools without altering the backend.

• Consistency: All backend operations, whether FIX-based or REST-based, are unified under a single, intuitive API layer.

By bridging the gap between low-level connectivity and user-friendly interfaces, FiSDK allows both traders and platform operators to focus on strategy, decision-making, and management—rather than backend complexity.