Most system design tools stop at diagrams on the whiteboard. But in the real world, systems are shaped by traffic spikes, bottlenecks, failures, and cost constraints-not markers and boxes. That's what really expected in any of the FAANG Interviews as well. in 2025, this gap pushed me to build SyDe, a visual system designer and real-time architecture simulator and its been eye-opening to see designs behave, not just look correct on paper. SyDe bridges the gap between "it looks right" and "it works in production" by giving you feedback with corrective actions while you design. SyDe turns static architecture diagrams into living simulations. Every component obeys real constraints like latency, throughput limits, and failure probability. Would love thoughts from engineers, tech preparing for interviews and architects. Public Beta out now.

SyDe.cc

System Designer & Real-time Cloud Architecture simulator

System Designer & Real-time Cloud Architecture simulator