This catalog serves as an auditable library of software systems and database patterns I have designed and deployed. These entries are structured as technical RFCs—detailing data flows, transaction boundaries, failure modes, and architectural trade-offs.
A highly resilient billing integration architecture designed to decouple checkout initiation from payment processing, systemically preventing double-charging and handling dropped webhooks.
A highly resilient inventory allocation pattern designed to prevent double-selling during flash traffic surges using pessimistic database locks and strict transaction isolation levels.
An isolation architecture ensuring strict multi-tenant data boundaries at the database layer using PostgreSQL Row-Level Security (RLS) and runtime context propagation.
Each pattern in this library represents production configurations run in active environments. Rather than using toy framework code, they are designed with respect to physical system constraints (e.g. statement timeouts, transaction scope boundaries, database indexing behavior, and socket retries).
