Design Systems. Prove Skills. Build Smarter.

The system design simulator built for serious engineering signal.

Practice architectures, compare tradeoffs, estimate capacity, simulate failures, and generate recruiter-ready reports from deterministic engines.

Code-driven architecture templates

Capacity and cost math without token burn

Recruiter-grade scoring rubrics

Failure simulations for real-world readiness

Design score

$18k

Savings found

Failures covered

Product Preview

A complete architecture lab in one polished workspace

Generate designs, expose bottlenecks, compare decisions, and turn candidate answers into structured hiring signal.

Prompt-led templates for WhatsApp, Netflix, Uber, URL shorteners, and more.

Deterministic comparisons across data, messaging, API, and deployment choices.

Monthly and yearly estimates with concrete optimization suggestions.

Scenario playbooks for outages, replica lag, region loss, and traffic spikes.

Staff-level prompts with pass thresholds and signal maps.

Side-by-side architecture tradeoff scoring for saved designs.

Portfolio-ready bundles for recruiters and internal planning.

Workload, APIs, data, reliability, and cost coverage at a glance.

Assess architecture depth with consistent scoring, reports, and benchmark-ready rubrics.

Practice high-signal problems and learn what strong designs include.

Estimate infrastructure cost before overbuilding the stack.

How It Works

Choose a system and scale profile.

Generate a deterministic architecture with sizing and bottlenecks.

Simulate failures, compare tradeoffs, and estimate spend.

Save a recruiter-ready report with strengths and gaps.

Pricing Teaser

Limited practice is free. Unlimited reports, exports, assessments, and team dashboards unlock as you grow.