Heizen interview experience Real time questions & tips from candidates to crack your interview

SDE - Intern

Heizen
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4 rounds | 11 Coding problems

Interview preparation journey

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Journey
It was truly an exciting journey. After the first HR round, I was quite confident that I had aced it, but I didn’t hear anything from them for a week. Just as my hope was fading, I received a call: “Your Round 2 is scheduled for tomorrow. We’ll share the details over email… please confirm the timings.” That one call boosted my motivation to its peak, and I sat down to revise everything I had prepared so far. The process went smoothly after that—two rounds on consecutive days—and after the CEO round, I received the offer in less than a day! So, keep your head up. The rough winds will settle sooner than you think.
Application story
I applied through LinkedIn on the company’s job posting page, and after a few days, their HR called me. I had my first HR round on the same day. After almost 10 days, I received a call for Round 2, which was a technical round, followed by a third round for a project discussion. Finally, the last round with the CEO took place, and after a mutual discussion, I was offered the position.
Preparation
Duration: 6 Months
Topics: React.js, TypeScript, Next.js, Express.js, Nest.js, Gen AI, RAG, Python (FastAPI), UI/UX knowledge, PostgreSQL
Tip
Tip

Tip 1: Spend more time mastering the basics; don't feel pressured to pick up a stack and speed-run the syntax.

Tip 2: At least have three AI-powered projects. You should understand everything about them from scratch.

Application process
Where: Linkedin
Eligibility: 6+ months of experience as a Web Development intern and at least one deployed project using Next.js. (Salary Package: 12 LPA)
Resume Tip
Resume tip

Tip 1: Avoid listing skills on your resume that are irrelevant or not tech-related.

Tip 2: Include a few projects on your resume, clearly mention their tech stack, and add a brief description of each.

Interview rounds

01
Round
Easy
HR Round
Duration15 minutes
Interview date18 Jul 2025
Coding problem3

1. HR Questions

  • Give a brief introduction about yourself, excluding all the technical aspects.
  • Why do you want to work as a software engineer despite your ECE background?

2. HR Questions

  • Do you have relevant experience with the tech stack mentioned in the job description, and how would you rate your proficiency in those skills?
  • Why would you be a better fit for the role compared to others with the same experience and knowledge level as you?

3. HR Questions

  • Many final-year students plan to pursue a Master’s and then aim for a job. Why do you want to skip that path and land a job right now?
  • How would you handle a conflict of ideas between team members if you were leading a project?
  • How would you handle priority tasks and tight deadlines?
02
Round
Medium
Face to Face
Duration25 minutes
Interview date27 Jul 2025
Coding problem4

1. String Parsing

You have a JavaScript string like this 
const obj = "james 20 20 grapes,
                   maline 120 5 soap,
                    carter 3 2 bread"

Make an array for objects with keys -> customer name, price, quantity,  product name.

2. API Fetch

You have an external user API. Create a React.js component that fetches random user data when the component mounts without using the useEffect hook, and render a user card showing their medical history and basic contact information.

3. DBMS

When and why do we prefer non-relational databases over relational databases?

4. DBMS

Create a relational database schema for a social media app that also allows a user to create and sell their own merchandise to their followers.

03
Round
Hard
Face to Face
Duration30 minutes
Interview date28 Jul 2025
Coding problem1

1. System Design

It was a project discussion round. The interviewer asked me to open one of my pre-built full-stack projects and explain how things were working in the app—how I would change or add certain features. They also gave me a few features to implement live during the interview.

The site I presented as my project was: https://www.mamasbabylounge.com
It is a daycare booking platform.

The interviewer asked me to add location-wise daycare fetching functionality and an AI-based verification check in the daycare listing and onboarding process.

04
Round
Easy
Online Coding Interview
Duration20 minutes
Interview date31 Jul 2025
Coding problem3

1. Role Expectations

Simple discussion about how things work in their company and how I would be expected to fulfil my role.

2. Learning Timeline

Asked me: if I had to discuss a project with a developer having 5+ years of experience in Java, how many days would it take for me to reach that level if I started from scratch?

3. Sprint Workflow

Mentioned the work policies and how they develop software in weekly sprints to ensure fast project delivery.

Here's your problem of the day

Solving this problem will increase your chance to get selected in this company

Skill covered: Programming

What is recursion?

Choose another skill to practice
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