The role of a software architect in project development is to design and oversee the architecture of software systems, ensuring they meet technical and business requirements. They establish the framework and guidelines for development, providing a clear vision of how various components interact. Software architects also focus on scalability, performance, maintainability, and security, making critical decisions that affect the long-term sustainability of the project. They often collaborate with developers, stakeholders, and various teams to ensure alignment on technical direction and project goals.