Training | Functional Ktor RESTful APIs using Arrow

Learn how to get the most out of Ktor by combining it with Arrow to create pure safe functional Backend applications.



Kotlin is becoming a widely adopted language for Backend development where frameworks like Ktor or Spring offer first class support for it. In this 2 day course we will learn how to make use of the Functional Programming paradigm to write a fully-fledged RESTful API using the power of Arrow.


  • Previous experience writing RESTful APIs.
  • Previous experience with Ktor / Spring / Play or any other frameworks of the like used to write REST services.

What you'll learn

  • Project setup.
  • Functional JSON serialization - deserialization using Helios.
  • Writing controllers.
  • Adding routes.
  • Writing endpoints for all the HTTP verbs (GET/POST/PUT/PATCH/DELETE).
  • Modelling our endpoints as pure suspended computations.
  • Adding and consuming query parameters.
  • Adding and consuming headers.
  • Adding functional authentication mechanisms.
  • Data validation and error handling.
  • Mapping errors to proper HTTP status codes.
  • Use railway oriented programming to model code branching for our endpoint logics.
  • Integrating third party libraries in a pure & safe way.
  • Adding a Redis cache.
  • Adding persistence by MongoDB.
  • Adding metrics.
  • Redirection and forwarding.
  • Handling multipart requests to upload files.
  • Testing our endpoints. Mocking and stubbing.
  • Adding encryption.
  • Versioning endpoints.
  • Encoding endpoints as functional streams.
  • Writing a simple functional client for our API using Ktor.

Company and Private Group Training

Company and Private Group Training


This Functional Ktor RESTful APIs using Arrow includes:

  • Maximum Class Size of 15
  • Access to Academy EduTools Platform
  • Access to Course Materials
  • Certificate of Completion
  • Access to a Private Channel with Trainers in the Academy Slack
  • A Q&A session one week post-course
  • A pre-and-post meeting with our trainers