I am looking for some one to build API integrations for: **hyperliquid.xyz** **app.lighter.xyz** REQUIREMENTS: Expose all available data points and actions provided by each platform’s official API. This should be done by thoroughly reviewing and implementing everything documented in their API documentation, without omitting endpoints or features. CORE FUNCTIONALITY (Required) The API integration must support, but is not limited to, the following: - Trading & Order Management * Place buy orders * Place sell orders * Batch order placement * Modify existing orders (if supported) * Cancel individual orders * Cancel all open orders - Portfolio & Account Data * Real-time and snapshot views of portfolio holdings * Wallet balances and margin information * Open positions and exposure * PnL (realized and unrealized) * Order history and trade history - Market & System Data * Market metadata (symbols, tick sizes, leverage limits, etc.) * Order book data * Trade feeds * Funding rates / fees (if applicable) * System status and rate limits - Technical Expectations * Clean, well-structured, and fully documented code * Modular design so endpoints can be easily extended or modified * Proper error handling and retries * Respect API rate limits and authentication requirements * Clear instructions on setup, configuration, and usage - Deliverables * A complete API client/library covering **all documented endpoints** * Example usage for key actions (trade, cancel, portfolio snapshot, etc.) * Documentation explaining each method and returned data * Source code with no obfuscation (full ownership and transparency) ** Notes If the platform supports WebSockets or real-time streaming, include those as well. If certain endpoints are undocumented but observable, note them clearly instead of guessing. - Please reply by providing: * Relevant experience with crypto trading APIs * Preferred programming language * Estimated timeline and cost