Engineering guides for financial product data.

How to determine what a consumer is eligible for, how to model products and rates without the schema fighting you later, and how to turn both into a comparison or recommendation surface. Written for engineers building the thing, not for search engines.

Eligibility

Which credit unions can this user join?The end-to-end implementation, with code.Field of membership, explained for developersThe domain model behind every eligibility rule.Modelling eligibility rulesRules, conditions, evidence and the unknown state.

Building products

Building a loan comparison marketplaceArchitecture, data sourcing, and the parts that bite.

APIs

Financial Product Eligibility APIConsumer in, eligible institutions and products out.Credit Union Eligibility APIMembership eligibility specifically.Product Recommendation APIRanked offers with reasoning.Rate Query APIRaw, filterable rate rows.