Hyperliquid execution adapter + MT4/MT5 bridge for TypeScript trading engine (individuals only)

I'm building out automated strategy execution for a trading education platform and I'm hiring one developer for a fixed-scope build. INDIVIDUAL DEVELOPERS ONLY. If you're an agency or will subcontract the work, please don't apply. The work, in two phases: - Phase 1: a Hyperliquid execution adapter for our existing TypeScript engine. Per-member position sizing, agent-wallet onboarding, and builder fees that vary by the member's tier. - Phase 2: an MT4/MT5 bridge (an EA that sends trades to our engine). We start with a paid one-week trial on Hyperliquid testnet, fixed price. The budget shown is a placeholder for that trial; quote your own price in your answer to question 6. No calls at this stage. Please answer these in writing, under 300 words total. Generic or copy-paste answers get skipped. 1. Have you shipped anything live on Hyperliquid mainnet? Link it or send a short Loom. Which signing library did you use? 2. How would you charge a different builder fee per member based on their tier, and what does the member have to sign first? 3. One account, BTC 40% / SOL 20% / ADA 20% of account value, 1.1x isolated. How do you turn that into order sizes, and what edge cases break it? 4. A reversal arrives as two webhooks with the same timestamp, and the open lands before the close. What does your code do? 5. Have you written an MT4/MT5 EA that posts trades to an external API? How do you handle partial closes and resent messages? 6. What's your fixed price for the one-week trial, and how many hours overlap with Panama time (UTC-5)? Thanks, Gven