Engineering Blog
Short, practical notes from the systems Z-SOFT builds and operates.
Scale and deploy without downtime
Use readiness checks, graceful shutdown, and user-facing metrics so that traffic reaches only healthy instances.
Multi-layer DDoS defence
Reject cheap attacks at the edge, and save your application logic for the requests that genuinely need context.
Make requests cheap before you auto scale
Keep requests lean, push side work onto a queue, and scale from demand signals that actually mean something.
Multi-tenant SaaS security: hold every boundary
Enforce tenant isolation across authorization, queries, storage and cache — never trust a single layer.
Write-behind: fewer database writes, same progress
Buffer frequent learning-progress updates in Redis and persist only the latest safe state.
Three-layer caching for multi-tenant SaaS
How CDN, Redis and versioned keys cut load without leaking one tenant's data into another's.
Turn your business challenge into a clear roadmap.
Talk directly with the Z-SOFT team about your goals, your current situation and the best next step.