Learn by Doing.
Real Scenarios. Real Systems.
Not just another sandbox. Zest gives you hands-on practice with realistic, end-to-end engineering scenarios — powered by knowledge from Staff+ engineers.
Free access after a quick 2-minute survey. No credit card required.
Beyond Sandboxes & Tutorials
Most learning tools give you isolated pieces. Zest gives you the full picture.
📦 Typical Sandboxes
- Isolated components (just Kafka, just K8s)
- Pre-configured labs with fixed outcomes
- Generic documentation-level knowledge
- No context of how systems interact
- Theory-focused, not battle-tested
🍋 Zest
- End-to-end system scenarios
- Realistic incidents with multiple mitigation and RCA solutions
- Real world system optimizations for the bottlenecks
- Expert knowledge from Staff+ engineers
- Production-grade, real-world patterns
Built for Engineers Who Learn by Doing
Interview Candidates
Preparing for Staff+ or system design interviews? Practice realistic scenarios that go beyond whiteboard theory.
Engineers Onboarding
New to a domain like Kubernetes or AI infrastructure? Get hands-on experience faster than reading docs.
Devs Leveling Up
Want to quickly catch up on specific areas? Practice with real scenarios instead of watching tutorials.
Hands-On Practice, Expert Knowledge
End-to-End Scenarios
Not isolated components — complete service interactions with realistic dependencies, failure modes, and edge cases.
Multiple Domains
Choose from Kubernetes Operations, AI Training Clusters, Inference Serving, Service Mesh, and more.
Expert-Level AI
Our AI is trained on knowledge from Staff+ engineers — not just public documentation. Get real-world insights on mitigation, RCA, and system optimizations.
Two Practice Modes
SRE Incident Command for live troubleshooting. R&D Architect for system design and optimization challenges.
Powered by Premium Expertise
We've invested in professional services and expert platforms to feed real-world, practical knowledge into our AI.
This isn't ChatGPT with a wrapper. Our AI has been specifically trained with expertise from Staff+ engineers — covering real incident mitigation, root cause analysis, and system optimization strategies.
Start Practicing in 3 Minutes
Quick Survey
Tell us about your experience and what you want to learn. Helps us personalize your scenarios.
Choose Your Scenario
Select your domain, difficulty level, and practice mode — SRE or Architect.
Practice Hands-On
Jump into realistic scenarios and get instant feedback from our expert-trained AI.
Stop Reading. Start Doing.
Free access after a 2-minute survey. Join engineers who are learning faster with hands-on practice.
Get Free Access →Takes ~2 minutes. Get instant access after completing the survey.