abdurrahman-kareem.hashnode.devWhen 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...Dec 28, 2025·5 min read
abdurrahman-kareem.hashnode.devBuilding 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...Oct 21, 2025·6 min read