The Post-AI
Technical Interview

Evaluate engineers on real-world tasks, not puzzles. Coderra captures how candidates think, research, and debug in an AI-native environment.

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coderra-assessmentsrcuser_controller.ts

Run Tests

Current Task

HIGH PRIORITY

Fix Race Condition in Profile Update

The updateProfile function handles concurrent requests incorrectly.

When multiple updates occur simultaneously, user data is being overwritten with stale values.

Objectives

Reproduce the concurrency bug

Implement optimistic locking

Verify with test suite

TSuser_controller.ts

TSapi.test.ts

➜coderra-assessmentgit:(main)npm test

Running test suite...

✕ FAIL src/controllers/user_controller.test.ts (2.4s)

● updateProfile › should handle concurrent updates safely

- Expected: 2
+ Received: 1

ReferenceError: Race condition detected in database write

➜coderra-assessmentgit:(main)

Live Proctoring

Integrates with your ATS

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TSpayment_service.ts×

10async processPayment(orderId: string) {

11 const order = await db.orders.find(orderId);

13 // FIXME: Double charge potential here

14 if (order.status === 'PENDING') {

15 await stripe.charges.create(order.amount);

16 await order.update({ status: 'PAID' });

17 }

18}

CRITICAL ISSUE

Race condition detected. Idempotency key missing in Stripe charge.

Fix Available

Real Engineering,
Not Puzzles

Candidates work in a browser-based sandbox that simulates real engineering work. From implementing complex data structures to debugging race conditions.

Debug existing issues
Implement new features
Full internet & AI access

Integrated AI Search
& Research Tracking

We replaced Google with a built-in AI search panel. This allows us to track query quality, refinement, and how candidates apply new information.

Candidate Query:

"How to optimize Postgres query with composite index..."

✓Valid research path identified

✓Applied concept correctly in code

AI Search

Your percentile

85%

Assessment Data

You have performed better than 15% of your peers at this rank.

Behavioral Signal Index

The Behavioral
Signal Index (BSI)

We generate a deep behavioral profile based on how the candidate builds the solution - capturing decisions, research patterns, and adaptability.

Reasoning Depth

Did they choose the right data structure? Did they understand the trade-offs?

Research Effectiveness

Can they find answers efficiently without copy-pasting solutions?

Implementation Velocity

How quickly do they iterate from a rough draft to working, clean code?

Designed for fairness,
built for signal

Coderra creates a better experience for candidates and richer data for hiring teams.

Fair & Humane

For Candidates

No puzzle nonsense. No trick questions. Candidates demonstrate their skills in an environment that feels like their actual job.

Reduced Drop-off Rates

Transparent Replay

For Hiring Teams

Watch the candidate work as if you were sitting beside them. Our timeline merges code edits, research, and decisions into one view.

Unified Replay Timeline

Summaries

AI Executive

Recruiters don't need to read code. Get a plain-English summary of how the candidate approached the problem and where they struggled.

Instant Evaluation

Fair & Humane

For Candidates

No puzzle nonsense. No trick questions. Candidates demonstrate their skills in an environment that feels like their actual job.

Reduced Drop-off Rates

Transparent Replay

For Hiring Teams

Watch the candidate work as if you were sitting beside them. Our timeline merges code edits, research, and decisions into one view.

Unified Replay Timeline

Summaries

AI Executive

Recruiters don't need to read code. Get a plain-English summary of how the candidate approached the problem and where they struggled.

Instant Evaluation

The New Standard
for Technical Hiring

AI can solve LeetCode problems in seconds. The old way of testing memory is dead. Coderra is the behavioral intelligence layer for the AI era.

Comparison

The Old Way

Traditional Coding Interviews

Recommended

The Coderra Way

Behavioral Intelligence

Evaluation Focus

Old Way:Memorizing algorithms

Coderra:Real-world debugging

Environment

Old Way:Artificial constraints

Coderra:AI-native environment

Tools Allowed

Old Way:Banning Google/AI

Coderra:Full internet access

Signal Quality

Old Way:Binary Pass/Fail

Coderra:Behavioral Intelligence

Candidate Experience

Old Way:Stressful & Artificial

Coderra:Natural Flow

The Post-AI Technical Interview

Fix Race Condition in Profile Update

Real Engineering, Not Puzzles

Integrated AI Search & Research Tracking

Your percentile

The Behavioral Signal Index (BSI)

Reasoning Depth

Research Effectiveness

Implementation Velocity

Designed for fairness, built for signal

For Candidates

For Hiring Teams

AI Executive

For Candidates

For Hiring Teams

AI Executive

The New Standard for Technical Hiring

The Old Way

The Coderra Way

The Post-AI
Technical Interview

Real Engineering,
Not Puzzles

Integrated AI Search
& Research Tracking

The Behavioral
Signal Index (BSI)

Designed for fairness,
built for signal

The New Standard
for Technical Hiring