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# Stencil Developer

Learn the key developer skills required to build custom storefronts with Stencil, and prepare for the Stencil Developer certification.

**Estimated Duration:** 27h 55min

## Courses

#### [Stencil Core](/developer/learn/courses/stencil-core/overview/course-overview)

18 lessons · 6h 55min

Learn the fundamentals of Stencil, BigCommerce's default theme engine, and the Cornerstone base theme.

#### [Stencil Advanced](/developer/learn/courses/stencil-advanced/overview/course-overview)

31 lessons · 11h 35min

Dive deeper into Stencil's technology stack, advanced customization, and deployment workflows.

#### [Widgets REST API](/developer/learn/courses/widgets-rest-api/overview/course-overview)

22 lessons · 9h 25min

Learn to create and manage widgets, templates, and placements using the Widgets REST API.