ZeroDay Dev
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About this app
Learn to break things — before attackers do.
ZeroDay Dev teaches secure coding and blockchain security through 1,000+ hands-on challenges. Learn from 30+ real-world exploits: Beanstalk, Indexed Finance, bZx, VeilCash, Sigma.Money, Bybit, and more. Each exploit is linked to verified incident records so you learn from actual on-chain events, not hypotheticals.
WHAT YOU'LL LEARN
• Exploits — Reentrancy, oracle manipulation, flash loans, proxy races
• Solidity — Proxies, storage collisions, OpenZeppelin, core security
• Rust — Ownership, borrowing, error handling, async
• DeFi — AMMs, lending, oracles, vaults
• Solana — Account model, security, Anchor
• Cybersecurity — Web security, HTTP smuggling, OWASP
HOW IT WORKS
• Practice — Tap, drag, or select. Quick feedback, no docs required.
• Exam — Timed tests across domains with performance tracking.
• Lightning Round — Sprint mode with interactive-only questions.
• Streaks & XP — Daily streaks, badges, and progression keep you consistent.
BUILT FOR DEVELOPERS
• Offline-first — Learn on the subway, no Wi‑Fi needed.
• No account required — Start immediately.
• 30+ real-world exploits — Beanstalk, Indexed, bZx, VeilCash, Bybit & more.
A zero-day is a vulnerability unknown to the vendor — they have zero days to patch it. We teach you to find and fix them before attackers do.
ZeroDay Dev teaches secure coding and blockchain security through 1,000+ hands-on challenges. Learn from 30+ real-world exploits: Beanstalk, Indexed Finance, bZx, VeilCash, Sigma.Money, Bybit, and more. Each exploit is linked to verified incident records so you learn from actual on-chain events, not hypotheticals.
WHAT YOU'LL LEARN
• Exploits — Reentrancy, oracle manipulation, flash loans, proxy races
• Solidity — Proxies, storage collisions, OpenZeppelin, core security
• Rust — Ownership, borrowing, error handling, async
• DeFi — AMMs, lending, oracles, vaults
• Solana — Account model, security, Anchor
• Cybersecurity — Web security, HTTP smuggling, OWASP
HOW IT WORKS
• Practice — Tap, drag, or select. Quick feedback, no docs required.
• Exam — Timed tests across domains with performance tracking.
• Lightning Round — Sprint mode with interactive-only questions.
• Streaks & XP — Daily streaks, badges, and progression keep you consistent.
BUILT FOR DEVELOPERS
• Offline-first — Learn on the subway, no Wi‑Fi needed.
• No account required — Start immediately.
• 30+ real-world exploits — Beanstalk, Indexed, bZx, VeilCash, Bybit & more.
A zero-day is a vulnerability unknown to the vendor — they have zero days to patch it. We teach you to find and fix them before attackers do.
Learn to break things. 1,000+ security challenges. Rust, Solidity, DeFi & more.
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Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- No data shared with third partiesLearn more about how developers declare sharing
- No data collectedLearn more about how developers declare collection
What’s new
Try Tutor Beta to search reviewed local lessons, incidents, and glossary sources while on-device model evaluation continues.
Explore new RAG, AWS Bedrock, LangGraph, Rust market microstructure, WireGuard, VPN, Zcash, virtualization, QEMU/KVM, Hypervisor, GGML, and GGUF lessons.
Find glossary terms faster with indexed search and smoother filtering.
Includes security, privacy, content consistency, and reliability improvements.
Explore new RAG, AWS Bedrock, LangGraph, Rust market microstructure, WireGuard, VPN, Zcash, virtualization, QEMU/KVM, Hypervisor, GGML, and GGUF lessons.
Find glossary terms faster with indexed search and smoother filtering.
Includes security, privacy, content consistency, and reliability improvements.
Everyone
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About the developer
John Lawniczak
ZeroDayDevApp@proton.me
210 Park Pl #1C
Brooklyn, NY 11238-4367
United States
