Service-oriented architecture (SOA) is a software design approach that facilitates the integration of independently maintained components or microservices within a single application, a concept that is becoming increasingly prevalent in the decentralized finance (DeFi) ecosystem. Chainlink, a key player in this space, provides a secure data infrastructure that enhances smart contract applications by offering reliable microservices like secure Data Feeds and Proof of Reserve. This architecture fosters innovation by enabling the rapid composition of new financial applications and products, allowing for the reuse and integration of decentralized microservices. The shift towards SOA mirrors trends in the broader computing landscape, moving away from monolithic systems towards more flexible, composable architectures, thereby improving security and accelerating development. The Chainlink Network plays a crucial role in this evolution by serving as a bridge for traditional companies to engage with the smart contract economy and supporting the development of robust DeFi protocols. This composability not only speeds up development but also creates a virtuous cycle of data usage and security, driving the smart contract ecosystem towards more diverse and secure services.