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Backend Engineer Online Test

About the test:

The Backend Engineer Test is preferred by recruiters to assess on-the-job skills of candidates before an interview. It reduces technical screening time by 80% by enabling employers to identify qualified candidates.

Covered skills:

  • Coding
  • Web Fundamentals
  • Databases
See all covered skills

9 reasons why
9 reasons why

Adaface Backend Engineer Online Test is the most accurate way to shortlist Backend Engineers

Reason #1

Tests for on-the-job skills

The Back-End Engineer Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates.

The Adaface Back-End Engineer Online Test screens candidates for the typical skills recruiters look for Back-End Engineer roles:

  • Knowledge of PHP, Python, Ruby, Java,.NET, JavaScript, and other programming languages
  • Extensive understanding of HTML and CSS
  • Knowledge of web server technologies such as NGINX, Apache, and J2EE
  • In-depth knowledge of OOP and software design concepts
  • Understanding of database management systems and NoSQL databases
  • Knowledge of Linux/Unix
  • Understanding of scripting languages such as Perl, Shell scripting, and others
  • Working knowledge of SASS and LASS

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for Back-End Engineer roles. Anti-cheating features enable you to be comfortable with conducting assessments online. The Back-End Engineer Online Test is ideal for helping recruiters identify which candidates have the skills to do well on the job.

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface ->
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

Reason #4

1200+ customers in 75 countries


With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!

Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Backend Engineer Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the Backend Engineer Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

Reason #7

Detailed scorecards & comparative results

Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring

About Back-End Engineer Roles

The back-end refers to the components of a computer application or program's code that allow it to function, but the user cannot view it. Most data and operational syntax are kept and accessed in the computer system's back end.

A back-end engineer is often in charge of creating the structure of a software programme. They'll mostly be responsible for building business logic, server scripts, and application programming interfaces (APIs) that front-end developers and UX designers will use.

Typical Back-End Engineer responsibilities include:

  • Create software that is fast, responsive, and scalable in C++, Ruby, Scala, and Java
  • Work with product and design teams to understand end-user needs
  • Create and implement service and system architecture for customer projects
  • Collaborate with cross-functional teams to generate new ideas
  • Assist in maintaining code quality by completing code reviews, unit tests, and automation
  • Create and deploy data storage systems
  • Set up back-end usability to ensure effective front-end integration
  • Establish best practices for back-end software engineering

What roles can I use the Backend Engineer Test for?

  • Backend Engineer
  • Software Engineer
  • Full Stack Engineer

What topics are covered in the Backend Engineer Online Test?

CAP Theorem

REpresentational State Transfer

NoSQL Databases
SQL Injection
Continuous Integration
Functional Testing
Acceptance Testing
Go Program

Interoperability, Reusability, Loose Coupling

Web Services
Microservices Architecture
Performance Testing

High Availability


Atomicity, Consistency, Isolation, Durable

ACID Property
Sticky Session Load Balancing
Session Affinity

Don't Repeat Yourself

DRY Principles

Duplication is Evil

DIE Principles
Clustered and Non-clustered Index
Continuous Integration
Continuous Delivery
Continuous Deployment
Monolithic Architecture

Service-Oriented Architecture

SOA Architecture
API Gateway Pattern
B-Trees Index
BASE Property
Distributed Transaction
Spike Testing
Twelve-Factor App Principles
RESTful API Design
Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.

reduction in screening time


Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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40 min tests.
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Accurate shortlisting.
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