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Backend Engineer Online 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.

Customized Based On:

  • Experience/ difficulty level
  • Multiple skills in 1 assessment
  • Job description/ role requirements

Covered Topics:

Web Fundamentals
Data Structres
See full list
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.

Human Resources Manager

Singapore Government

reduction in screening time

How to use the Adaface Backend Engineer Test

Start screening candidates within minutes with the ready-to-go Backend Engineer Test

1. Choose the most appropriate test for your role

2. Start inviting candidates to complete the assessment

3. Receive real time notifications and shortlist the best candidates

Customize the Adaface Backend Engineer Test according to your job description

1. Get a custom assessment from our library of 500+ skills within 48 hours

2. Start inviting candidates to complete the assesment

3. Receive real time notifications and shortlist the best candidates

Adaface Backend Engineer Test is trusted by enterprises worldwide

Morgan Stanley
SG Government
Ernst and Young
Optimum Solutions
United Nations
Love Bonito

About the Adaface Backend Engineer Test

Evaluate technical and coding skills with Adaface skills assessment platform powered by an intelligent chatbot.


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

Recommended Roles:

Backend Engineer
Software Engineer
Full Stack Engineer

Why You Should Use This Back-End Engineer Test

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.

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

Distribution Of Test Scores

The actual score distribution will vary based on your candidate pipeline quality, but you should typically expect ~20% of the candidates to do well on Adaface assessments.

The score distribution for our assessments follow the normal curve. This is a good sign- standardized tests like SAT and GRE follow the normal distribution (bell curve).

Status quo assessments typically have the exact opposite of the bell curve (too many candidates getting close to 0, too many candidates getting close to 100 and too few candidates in the middle). This is typically because they focus on theoretical questions or trick questions, which are very binary in nature- either you know the trick/ theory or you don’t.

How Adaface Is Different

Adaface conversational assessments are reflective of on-the-job skills and see an 86% completion rate as compared to ~50% for traditional assessment platforms.



Theoretical questions/ puzzles

Feels like a test

One-size-fits-all assessments




Questions for on-the-job skills





What is a custom assessment?

Every role is different and requires a custom assessment to identify top candidates efficiently. Adaface subject matter experts understand your job description/ role requirements and pick the most relevant questions from our library of 10000+ questions to create a technical assessment that helps you find the qualified candidates in your candidate pipeline quickly. All custom assessments are set up based on the job description, role requirements, must-have skills, experience level and salary range within a maximum of 48 hours and you will get an email notification once it goes live.

Check out a sample assessment here (no credit card required).

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.

How is Adaface different from other assessment tools?

We believe that status quo tech assessment platforms are not a fair way for companies to evaluate engineers because they focus on trick questions/ puzzles/ niche algorithms. We started Adaface to help companies find great engineers by assessing on-the-job skills required for a role. Read more about why we started Adaface.

Here's what's different with Adaface:

  • High quality non-googleable questions that test for on-the-job skills as opposed to theoretical knowledge.
  • A friendly conversational assessment with a chatbot, instead of sending a "test" to a candidate. This translates to a higher completion rate. Adaface assessments (86% candidate completion rate), as opposed to traditional tests (40-50% candidate completion rate)
  • Customized assessments for 700+ skills at different experience levels.

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

We have the following anti-cheating features in place:

  • Web proctoring
  • Webcam proctoring
  • Plagairism detection
  • Non-googleable questions
  • 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?

The platform is completely self-serve, so here's one way to proceed:

  • You can sign up for free to get a feel for how it works.
  • The free trial includes one sample assessment (Java/ JavaScript) that you will find in your dashboard when you sign up. You can use it to review the quality of questions, and the candidate experience of a conversational test on Adaface.
  • To review the quality of questions, you can also review our public questions for 50+ skills here.
  • Once you're convinced that you want to try it out with real assessments and candidates, you can pick a plan according to your requirements.

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.

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

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