Write software
that must never fail.
AcrossTheWire turns dry IEC 61508, DO-178C, and ISO 26262 standards into story-driven, hands-on challenges. Master functional safety engineering the way cybersecurity pros master offensive security — by doing it.
Free tier · No credit card · 70 challenges across 10 rooms
Training Rooms
Each room is a crisis. You are the Safety Engineer.
Nuclear Control Room
Prevent a meltdown by fixing safety violations in ECCS control software.
Surgical Robotics OR
Audit the RoboSurgeon-3000 before it enters the operating theatre.
Avionics Flight Deck
Certify the Flight Management System before Flight 701 takes off.
ADAS Highway Lab
Certify the AEB system before 50,000 vehicles ship. One bug, one crash.
Infusion Pump ICU
One overdose could be fatal. Certify the infusion pump before it enters the ICU.
Formal Methods Lab
Run the model checker. Read the counterexample trace. Prove the system correct — or find the flaw before it ships.
Hazard Analysis Lab
Dissect each system with the industry's sharpest tools. Find the gate error, the missing mitigation, the hidden race condition — before the incident report writes itself.
Requirements Traceability Lab
Every line of code must trace to a requirement. Every requirement must trace to a test. One missing link is how disasters stay hidden until the audit — or the fatality.
Railway Signaling Control Center
Interlocking, ATP, and SIL allocation under EN 50128. Stop a wrong-side failure before two trains share one block.
Incident Archive
Reconstruct historic software failures. Learn the race, the overflow, the single sensor, and the orphan code path.
Learn from Real Disasters
AcrossTheWire challenges are built around actual failures in safety-critical software.
Race conditions in safety-critical medical software
Integer overflow in inertial reference system
Single-point failure in angle of attack sensor
Everything you need to go from intern to architect
Real Standards, Real Skills
Learn IEC 61508, DO-178C, ISO 26262, and ARP4761 through hands-on challenges — not slide decks.
Gamified Progression
Earn XP, unlock ranks from Safety Intern to Safety Legend, and collect domain-specific badges.
Competitive Leaderboards
Compete globally and within your domain. Show employers your rank before the interview.
Four Challenge Formats
Code review (Monaco editor), FMEA table analysis, standards quizzes, and formal verification with TLA+, PRISM, and Promela.
Your Path to Safety Legend
8 ranks to climb. Every challenge matters.
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