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Elizabeth Stein
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Case study

devtools2025

Security Trainer

Interactive cybersecurity training platform with hands-on exercises, vulnerability simulations, and progress tracking for developers.

Building the tools that build the tools

Field notes

Role

Creator

Read order

Evidence first, then constraint → build → proof. Use the chapter rail to jump sections; orbit to adjacent work from the bottom of the case study.

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Evidence

System surface

No public screenshot on file—generative preview stands in for the visual layer.

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security-trainer.vercel.app

Story arc

How this shipped

Building the tools that build the toolsThree beats: what pressed against the work, how the stack answered, and what changed once it was live.

I · Constraint

The brief

Security training is often theoretical and boring. Developers learn best by doing, but vulnerability labs are complex to set up.

II · Build

The craft

Built sandboxed vulnerability simulations developers can exploit safely. Hands-on exercises teach OWASP Top 10 through practice.

III · Proof

What moved after launch

Hands-on exercises increase retention 3x vs reading. Sandboxed environments eliminate setup friction. Progress tracking identifies knowledge gaps.

Inventory

Stack & signals

SecurityNext.js
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Tell me what you're building

If you need someone who can own UI, systems, and AI integration without losing the plot—I'm listening. Contract, advisory, or full-time: we'll find the right shape.

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© 2026 Elizabeth Stein

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