KAKareem Abdurrahmaninabdurrahman-kareem.hashnode.dev·Dec 28, 2025 · 5 min readWhen Time Becomes a Bug: Lessons from Scheduling Payments at ScaleIn payment systems, correctness is not optional.And time, as it turns out, is deceptively difficult to handle correctly. Payment scheduling looks deceptively simple. You store a date, wait until that date arrives, and execute a transaction. In realit...00
KAKareem Abdurrahmaninabdurrahman-kareem.hashnode.dev·Oct 21, 2025 · 6 min readBuilding a Multi-Intent Conversational Agent for PaymentsBuilding a Multi-Intent Conversational Agent for Payments Lessons from building a GPT-powered money assistant. Introduction Over the past few months, my team and I worked on building a WhatsApp-based payment experience, a conversational agent that al...00