Full-Stack Engineer Job Simulation
Two tickets. Real buggy code and a real design brief. An AI reviewer that grades your reasoning like an engineering manager would. Pass both and earn a shareable certificate - and a spot on the weekly leaderboard.
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PriyaEngineering Manager, ShelfWise
Welcome aboard! I'm Priya, Engineering Manager at ShelfWise. You're joining mid-sprint - a checkout bug is hurting real customers and a restock API needs designing. In this job, understanding WHY something broke matters more than making the error disappear. Show me your reasoning.
Your manager for this simulation. Reviews feel this real too.
Why complete this job simulation
A risk-free way to experience the full-stack job before you're hired - read real buggy code, defend a real API design, get manager-grade feedback, and back your applications with proof.
Debug like it's week one. A real React + Next.js code listing with three production bugs - the exact class of bugs that fills a junior engineer's first sprint.
Zero risk. Attempting is free and failing costs nothing. You get a component-by-component score breakdown, fix your reasoning and resubmit.
Learn what interviews actually probe. Dependency identity, stale closures, HTTP semantics, idempotency, embed-vs-reference - the questions behind every full-stack interview round.
Feedback like a real code review. Every submission returns the score math plus what to fix - which bug you misread, which failure mode your design ignored.
Proof recruiters can verify. A certificate with its own public link, LinkedIn-ready, plus a weekly leaderboard rank.
Interview ammo. After each pass, unlock why the task was designed this way and how the same work shows up in real engineering jobs.
How it works
01Pick up a ticket
Real tasks land on your board like a Jira queue. Download the dataset and work in your tool of choice.
02Submit for review
Your work enters review - results within 24 hours (usually much sooner). The clock pauses while you wait, like a real take-home.
03Pass, then progress
Pass to unlock the next ticket. Clear every ticket to earn a certificate and a spot on the weekly leaderboard.
Skills you will learn and practice
- React Debugging
- useEffect & Dependency Identity
- Stale Closures & State Flow
- HTTP & REST Semantics
- API Design & Idempotency
- Data Modeling (Embed vs Reference)
- Failure Handling & Testing Strategy
- Engineering Communication
The tickets
What you'll learn
- How React's dependency-identity rules turn one object literal into an infinite loop
- Why stale closures silently compute from old state - and the three ways to fix them
- Why an API that returns 200 with an error body breaks every client downstream
What you'll do
- Read a real ~120-line React + Next.js checkout listing with three production bugs
- Answer five precise debugging questions about what breaks and why
- Write a fix memo explaining root causes and fixes like a real code review
Weekly leaderboard
Highest ranking points top the board - your score counts 80%, your speed 20%.
Your Future Certificate
Preview only. Clear both tickets to earn your personalized certificate - free.
Verified Certificate
Unique verification URL & QR code
LinkedIn Integration
Add to your profile with one click
Performance Analysis
Detailed insights into your results
Issued by DPIIT-recognized & MSME-registered company
Clear it, prove it
Pass both tickets and your verifiable certificate is free - add it to LinkedIn right away. Want to go deeper? Generate a personalized AI review of your performance for a one-time ₹99.