DevStack
Get Started Free
AI-powered interview preparation

Crack Any Interview
with Confidence

Personalized interview prep for your target company, role and experience level. Practice real questions, get AI feedback, and follow a complete learning path - all in one place.

Start Preparing Free Watch Demo
  • Company-specific questions
  • AI-powered feedback
  • Coding · System Design · Behavioral
  • For every role
Google›Software Engineer›Coding Round00:24:17

1. Two Sum

Easy

Given an array of integers nums and an integer target, return the indices of the two numbers that add up to target.

Input: nums = [2,7,11,15], target = 9
Output: [0,1]
Hint 1 readyHint 2Hint 3
JavaScript
function twoSum(nums, target) {
  const seen = new Map();
  // Write your code here
}
Case 1 passed
Case 2 passed
× Case 3 failed
Correctness80%
Time complexity70%

How DevStack Works

A complete, personalized interview preparation journey - from analysis to success.

  1. 1

    Choose Your Target

    Select company, role and experience level.

  2. 2

    Upload Resume

    Our AI analyzes your resume and job description.

  3. 3

    Get Personalized Plan

    Customized questions and learning path.

  4. 4

    Practice & Learn

    Solve questions, use AI hints, learn as you go.

  5. 5

    Track Progress

    Detailed feedback and improvement plan.

Everything You Need to Crack Your Interview

A complete toolkit for interview preparation across companies and roles.

  • Company-wise Questions

    Real interview questions organized by company, role and round.

  • AI-Powered Evaluation

    Detailed feedback, graduated hints and suggestions - without handing you the answer.

  • Coding Environment

    Monaco editor, test cases, hidden tests and instant results.

  • System Design CanvasComing soon

    Interactive whiteboard with AI follow-up questions.

  • Behavioral Interview PrepComing soon

    STAR-style answer coaching with AI follow-ups.

  • Video LearningComing soon

    Topic-wise explanations connected to your weak areas.

  • Personalized Learning Path

    A study plan built from your resume, job description and target role.

  • Progress Tracking

    Readiness, weak topics and improvement over time.

  • For Every RoleComing soon

    Starting with software engineering, expanding to product, design, data, finance and more.

Personalized Dashboard for Your Success

Track your progress, focus on weak areas, and stay on track with your interview goals.

Welcome back 👋
Sample dashboard - yours is built from your resume and results.
Google · SDE II
Overall readiness
Coding84%
System Design71%
Behavioral62%
Communication74%
Today's practice
LRU Cache (Coding)30 min
URL Shortener (System Design)45 min
Leadership question (Behavioral)20 min
Weak areas
System Design
Database scaling
Behavioral
Quantifying impact
DSA
Graph traversal
Communication
Jumping to implementation
Recommended next
  1. 1. Watch the Database Scaling lesson
  2. 2. Solve 2 graph problems
  3. 3. Practice a STAR behavioral question
  4. 4. Complete one system design mock

Start Your Interview Preparation Today

Pick your company and role, add your resume, and get a plan built around you.

Get Started Free Watch Demo