Backend Assessment

The backend assessment task focuses on evaluating the candidates' proficiency in designing, troubleshooting and debugging backend systems

Candidates will be tasked with setting up and troubleshooting a broken codebase, thus demonstrating their understanding of key concepts such as database management, API design, server-side scripting, and system architecture. The assessment will assess candidates' ability to navigate and maintain a codebase.

Through this task, candidates will showcase their problem-solving skills and their capacity to deliver high-quality backend solutions that meet specified requirements and can scale with growing user demands.

Dependencies

• Nodejs v18 or greater
• npm or yarn

Getting Started

1. Clone the repo

git clone https://github.com/easepay/backend-assessment.git assessment
cd assessment

2. Install dependencies

npm install 

3. run the application

npm run start:dev

4. fix the bugs See the task section

5. commit and save

Task

1. Create a .env file from the env template
2. Ensure the application starts successfully
3. Ensure the application base URL returns "Hey! Application up and Running!"
4. Run the Database Migrations
5. Make a request to http://localhost:3000/v1/waitlist, to add a user to the waitlist. The request body takes "email" and "fullname" fields
6. Implement a PUT endpoint and update the email of the previously added user
7. The GET request returns incorrect data, fix the request to the GET::http://localhost:3000/v1/[email protected] to fetch the user's record
8. Remove data.id property from the GET::http://localhost:3000/v1/[email protected] HTTP response
9. Make a DELETE request to the http://localhost:3000/v1/[email protected] to remove the user's record
10. Review changes
11. write a bash script that automates the deployment of the above application to a production environment

Section 2

This will be an oral / written conversation to gauge your understanding of Nextjs Fundamentals

1. How does NestJS handle dependency injection, and what are the benefits? Can you explain the difference between a provider and an injectable in NestJS??

2. Can you walk me through how you would Dockerize a NestJS application that uses a separate API gateway and multiple microservices? How would you handle environment variables and configuration for each service?

3. How would you use bash scripting to automate the testing and linting of a NestJS application?

4. What is SQL injection, and how can it be prevented in NestJS?