Senior full-stack developer for ongoing maintenance of a live automated trading system.

Do not call, do not search my LinkedIn, do not email me. Only respond to this ad or you will not be considered. I run an automated system that places bets on the Betfair exchange during set live hours each day. The core logic is already built and fully documented in a detailed build spec, which you'll receive. I need an experienced developer to take ownership of the codebase — keep it clean, keep it running exactly to spec, and deliver the roadmap. The system is full-stack: a backend engine that reads market data and executes against the Betfair API, a data/ledger layer, and a front-end interface. I believe it's built in Laravel (PHP), but confirming and auditing the stack is one of your first tasks. Immediate scope Clean up messy code — refactor and tidy without changing behaviour Tidy up the interface Verify and fix the system so it functions exactly as per the latest build spec Respond quickly to live maintenance issues Next objectives (roadmap) Fine-tuning the engine and its functions Data integrity — ledger accuracy and reconciliation Security hardening A messaging service integration that alerts me when the next trade is about to go live You must be Genuinely senior and full-stack — extensive production experience, not learning on my project Available and highly responsive 10am–5pm AEST (UTC+10), the live operating hours — problems need fast turnaround while the system is trading Comfortable auditing an existing codebase, confirming the stack, and working to a written spec Experienced with third-party API integrations (Betfair, WhatsApp/messaging) and data-integrity work Ready to start immediately To be considered, start your reply with the word "LIVE" and include: (1) your read on the likely tech stack from this description, (2) confirmation you can cover 10am–5pm AEST weekdays and take emergency weekend calls, and (3) two examples of similar systems you've built or maintained.