update question

README.md

@@ -0,0 +1,32 @@
+# Junior Backend Engineer Interview
+
+Imagine that you're building a fintech system. You're now building a small microservice that allow people to send money to each other.
+
+## Instructions
+
+1. Checkout into a new git branch with name like `YYYY-MM-DD-nickname`
+
+1. Navigate into any language directory you're comfortable with
+
+1. Implement the `POST /transfer` API endpoint that allows you to transfer money from one account to another.
+
+    The account balance has to reflect the new balance after transfer for both accounts and the transaction has to be recorded.
+
+    Example request look like below:
+
+   ```
+   curl -X POST http://localhost:3000/transfer \
+     -H "Content-Type: application/json" \
+     -d '{"amount": 100, "sender": "1", "receiver": "2"}'
+   ```
+
+1. Implement a new API endpoint `GET /all-transactions` that shows all transactions in the system.
+
+1. Commit & push your changes to the git upstream.
+
+Bonus points:
+
+- Implement the requests validation
+- Handle errors appropriately
+
+Good luck!