core-banking-engineer

What problem does it solve?

PayU's backend architecture is highly complex and demands disciplined design to ensure modularity, scalability, and resilience across multiple services. This skill provides a blueprint for building core banking systems using Hexagonal Architecture, domain-driven design, and resilient patterns. It offers governance and best-practice guidance to unify Spring Boot 3.4 and Quarkus-native workloads under a coherent architectural standard.

Core Features & Use Cases

• Hexagonal Architecture blueprint: Domain logic remains free of framework dependencies; ports and adapters connect to infrastructure.
• DDD & Architecture Governance: Enforce clean boundaries with ArchUnit rules and domain events.
• Resilience, Transactions & Caching: Guidance on transactional boundaries, outbox patterns, idempotency, and layered caching strategies.
• Cross-cutting guidance: Spring Boot 3.4 patterns, Quarkus native considerations, and performance-oriented Java patterns for multi-service environments.

Quick Start

Define a new core banking service blueprint and outline the Transfer use case, including domain entities, ports, adapters, and transaction boundaries.