Hire for fit.
Not just skill.
JobStack AI goes beyond coding tests. We simulate your team,
culture, and work environment — so you know they'll thrive before day one.
In Review
4Sarah Chen
Senior Backend Engineer • Application #294
Exceptional solution. The SQL optimization was clever and handled edge cases well.
Scorecard
Skill Velocity
Trusted by innovative teams at leading companies.
Companies using JobStack AI reduce mis-hires by 73%
Hiring is broken
The traditional process is failing both companies and candidates. It's time to stop guessing and start knowing.
Given the root of a binary tree, invert the tree, and return its root.
• Being watched
• Irrelevant to actual job
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Hiring, Reimagined
Stop guessing. Start simulating. Our AI-powered platform transforms how you evaluate talent.
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The Scenario Engine™
Forget LeetCode. Test candidates on real-world engineering problems. Our engine spins up full-stack environments where candidates fix bugs, optimize databases, and review code—just like they would on the job.
- ✓Full-stack environments
- ✓Real-time collaboration
- ✓Automated grading
The Persona Stack™
Don't just interview. Simulate interactions. Our AI agents roleplay as Product Managers, demanding stakeholders, and junior devs to test soft skills and communication in high-pressure scenarios.
- ✓AI Roleplay Agents
- ✓Soft Skill Analysis
- ✓Communication Scoring
Team DNA™ Analysis
Hire for add-on, not just fit. Our system analyzes your team's existing strengths and gaps, then identifies candidates who bring the specific cognitive diversity you need.
- ✓Gap Analysis
- ✓Cognitive Diversity
- ✓Predictive Success
How It Works
From Team DNA to perfect hires in four seamless steps.
Define Your Team DNA
Upload your team's profiles or answer a quick survey. Our AI maps your culture, communication styles, and working patterns.
AI Generates Custom Assessments
Based on your Team DNA and role requirements, our Scenario Engine creates hyper-relevant challenges unique to your company.
Candidates Experience the Job
Candidates solve real problems in realistic environments. AI Personas simulate stakeholder interactions and collaboration.
You Get Fit Scores
Receive comprehensive reports with skill verification, cultural alignment scores, and AI-powered hiring recommendations.
Our Products
Three powerful tools, one integrated platform. Transform every stage of your hiring process with AI that actually understands engineering.
Scenario Engine™
Real Work. Real Assessment.
Stop testing for algorithmic trivia. Evaluate candidates on the actual work they'll do—debugging production code, optimizing queries, and solving real engineering problems.
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Persona Stack™
Test Human Skills. Not Just Code.
Deploy AI agents that simulate demanding stakeholders, difficult teammates, and high-pressure scenarios—revealing soft skills no coding test ever could.
Team DNA™
Hire for Add-On. Not Just Fit.
Map your team's cognitive topology. Identify skill gaps. Find candidates who don't just fit—they elevate your entire team to the next level.
Hiring, reimagined
with AI
We don't just test if candidates can code — we test if they can work on YOUR team. Experience the future of technical hiring.
Built for your keyboard
Fly through your tasks with rapid-fire keyboard shortcuts for everything. Literally everything.
Breathtakingly fast
Built for speed with 50ms interactions and real-time sync.
Designed for modern software teams
Comes with built-in workflows that create focus and routine.
Linear MethodProduct principlesMeet your command line
Complete any action in seconds with the global command menu.