Pricing Engine
Scalable pricing architecture supporting merchant and bank pricing requirements.
Problem
Support constantly evolving pricing rules across merchants, products, and banking partners without redeploying services for every change.
Architecture
A configuration-driven pricing service that resolves the applicable price from layered rules (product, merchant, partner, promotion) with deterministic precedence.
Technical challenges
Keeping pricing correct and auditable as rules multiply, and computing prices fast enough to sit inline with transactions.
Solution
A declarative rule model with explicit precedence, cached resolution paths, and a full audit trail of which rule produced each price.
Scale
Serves pricing decisions inline with transaction processing.
Lessons learned
Making pricing declarative and auditable turned a source of bugs into a self-service capability for the business.
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