Uploaded March 2025 | Updated September 2026, 1 week ago
Get an introduction to building a CRUD backend that allows users to register and login and then save notes in a MongoDB instance. This crash course uses Kotlin and covers REST APIs from the absolute basics up to building a fully working secured backend.
⭐ Courses with real-life practices
⭐ Save countless hours of time
⭐ 100% money back guarantee for 30 days
⭐ Become a professional Android developer now:
pl-coding.com/premium-courses
Download IntelliJ:
jetbrains.com/idea/download
Mongo Atlas registration:
mongodb.com/products/platform/atlas-database
💻 Let me be your mentor and become an industry-ready Android developer in 10 weeks:
pl-coding.com/drop-table-mentoring
Regular programming advice on my Instagram page:
instagram.com/_philipplackner_
Join my Discord server:
discord.gg/cwQbmUstEu
Get the source code for this video here:
github.com/philipplackner/SpringBootCrashCourse
Kotlin Crash Course: youtu.be/dzUc9vrsldM?si=8vGs792MWd4_cEyX
00:00 Prerequisites
1:43 - What even is a REST API?
7:25 - What is a backend framework?
9:55 - What we will build
11:02 - Creating a Spring Boot project
15:20 - Project roundtrip
21:18 - Mongo Atlas setup
33:14 - Saving notes to MongoDB
1:06:00 - Base setup for security config
1:12:55 - Checking notes in Mongo Atlas
1:14:24 - Spring's Bean mechanism
1:17:30 - Deleting notes
1:21:05 - Setting up the user collection
1:30:12 - JWT generation & verification
1:57:27 - User registration & login
2:35:55 - Responding with correct status codes
2:44:57 - Field validation
2:52:47 - Trying it out & fixing last bugs
Get an introduction to building a CRUD backend that allows users to register and login and then save notes in a MongoDB instance. This crash course uses Kotlin and covers REST APIs from the absolute basics up to building a fully working secured backend.
⭐ Courses with real-life practices
⭐ Save countless hours of time
⭐ 100% money back guarantee for 30 days
⭐ Become a professional Android developer now:
pl-coding.com/premium-courses
Download IntelliJ:
jetbrains.com/idea/download
Mongo Atlas registration:
mongodb.com/products/platform/atlas-database
💻 Let me be your mentor and become an industry-ready Android developer in 10 weeks:
pl-coding.com/drop-table-mentoring
Regular programming advice on my Instagram page:
instagram.com/_philipplackner_
Join my Discord server:
discord.gg/cwQbmUstEu
Get the source code for this video here:
github.com/philipplackner/SpringBootCrashCourse
Kotlin Crash Course: youtu.be/dzUc9vrsldM?si=8vGs792MWd4_cEyX
00:00 Prerequisites
1:43 - What even is a REST API?
7:25 - What is a backend framework?
9:55 - What we will build
11:02 - Creating a Spring Boot project
15:20 - Project roundtrip
21:18 - Mongo Atlas setup
33:14 - Saving notes to MongoDB
1:06:00 - Base setup for security config
1:12:55 - Checking notes in Mongo Atlas
1:14:24 - Spring's Bean mechanism
1:17:30 - Deleting notes
1:21:05 - Setting up the user collection
1:30:12 - JWT generation & verification
1:57:27 - User registration & login
2:35:55 - Responding with correct status codes
2:44:57 - Field validation
2:52:47 - Trying it out & fixing last bugs
