This story was originally published on HackerNoon at: https://hackernoon.com/decision-engines-in-production-json-logic-rules-engines-and-when-to-scale. Learn how to build auditable, explainable decision systems using JSON logic, rules engines, and AI for fintech, insurance, healthcare, and regulated domains. Check more stories related to programming at: https://hackernoon.com/c/programming. You can also check exclusive content about #json-logic-vs-rules-engine, #auditable-fintech-workflows, #healthcare-decision-automation, #business-rules-versioning, #decision-engine-spectrum, #human-readable-logic-systems, #ai-decision-framework, #decision-engines-in-production, and more. This story was written by: @erindeji. Learn more about this writer by checking @erindeji's about page, and for more stories, please visit hackernoon.com. Hardcoded logic grows into unmanageable complexity in regulated industries. Start simple, then scale: JSON logic for 10–50 rules, rules engines for complex interdependencies, and AI for pattern recognition. The goal: auditable, traceable, and reproducible decisions. Combine tools to ensure compliance, performance, and explainability from day one, keeping workflows reliable and regulators happy.