Typelevel Rite of Passage

English | MP4 | AVC 1920×1080 | AAC 44KHz 2ch | 71 Lessons (29h 56m) | 4.96 GB

The experience of a software engineer.

Build your own full-stack product in Scala 3 with the Typelevel stack.

Build a Full-Stack Application with Scala 3 and the Typelevel Stack

Just as Scala has transformed the way we build applications with functional programming, the Typelevel stack is changing how we build strong, testable and provably correct APIs.

With a focus on functional Scala and a real world application, this course is a start-to-finish way to learn Full Stack Scala 3 with Cats, Cats Effect and friends.

Join me as I show you how to build a full stack jobs platform with the latest evolution of Scala and functional libraries.

What will you build?

Together we will build the Rock the JVM Jobs Board, a full stack online jobs platform with credit card integration. Users can create and manage their account, post and view jobs, and apply for them.

We will build the application from scratch, using a decoupled layered architecture on the backend, and an Elm-like architecture on the frontend with ScalaJS.

The app includes many server-side bits including authentication, permissions, sending email, uploading images, and charging credit cards. We have almost complete test coverage in the backend, and we develop some core modules with test-driven development (TDD).

The frontend is built as a single-page application, organized for for scalability if you want to add new pages or functional components.

Cats
The functional programming library for Scala. We will use it to make our code modular, expressed in terms of capabilities.

Cats Effect
The Scala library that allows us to write composable and high-performance applications with pure functional programming.

Every action we perform is built with Cats Effect.

Doobie

The Typelevel library that allows us to work with databases, using type-safe queries. We will use PostgreSQL as an actual database.

Http4s

With this Typelevel library we’ll build our REST APIs with JSON payloads, automatic validation, incremental content loading with pagination etc., as well as manage authentication, authorization with JWTs and role-based access control.

Tyrian

A lightweight Scala 3 library for single-page applications in a purely functional way, Elm-style. While not “officially” a Typelevel project, it is based on Cats Effect and FS2 to manage application state. Our entire frontend is built with Tyrian:

• routing
• authentication flow
• checkout
• error/success UI state
• fetching data from backend

Honorable Mentions

• PureConfig for configuration
• FS2 for incremental loading on the backend
• FS2 for SPA history management on the frontend
• TSec for JWT authorization and RBAC
• Circe for JSON
• Log4Cats for purely-functional logging
• ScalaTest with TestContainers wrapped in Cats Effect