diff --git a/README.md b/README.md
index 221e1e0..35dda30 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ This repository contains study materials for technical interviews.
 * [CodeRust](https://www.educative.io/collection/5642554087309312/5679846214598656)
 * ["Awesome Interview Questions"](https://github.com/MaximAbramchuck/awesome-interview-questions)
 * [Codility for programmers](https://codility.com/programmers/)
+* [4x Y Combinator Engineering Challenges](https://www.insidesherpa.com/virtual-internships/prototype/oRMogWRHeewqHzA7u/College-students%3A-Learn-how-to-work-at-a-YC-startup-)
 
 ## Videos
 * [How to Work at Google - Candidate Coaching Session](https://www.youtube.com/watch?v=oWbUtlUhwa8&feature=youtu.be)