Software Engineering

269 learners

Building Robust and Modular APIs

Take your API to the next level by making it more robust and maintainable. You'll learn to validate incoming data, create centralized error responses and success messages, and use middleware to log requests in a structured and insightful way. You'll also refactor core logic into reusable service modules—key skills for building professional-grade applications.

Nextjs

TypeScript

See path

4 lessons

14 practices

1 hour

Course details

Validating Incoming Data

Preview

Get Ready to Validate: Explore the Validation Flow

Level Up Your Validation: Smarter Rules for Better Data

Secure & Strict: Guarding Your API Like a Pro

Apply Your Defenses: Validate Before You Trust

Previous Course Next Course: Project: Building a Task Manager API

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From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

Building Robust and Modular APIs

Course details

Unit 14 practices16 min

Unit 24 practices16 min

Unit 33 practices13 min

Unit 43 practices13 min

Turn screen time into skills time

Join the 1M+ learners on CodeSignal

From our community

From our community