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Lessons (12)

• Design a File Storage Service

  Upload bytes directly to object storage while the API owns durable metadata, authorization, sharing and synchronization. ![File storage …

• Storage Engines & Database Operations

  … Know your recovery point objective (how much data loss is acceptable) and recovery time objective (how long restoration …

• ConfigMaps, Secrets & Storage

  … Safer for important data. 💡 For uploads and user files, object storage (S3, GCS, Azure Blob) accessed through its …

• Design a Social Media Feed

  Build a fast home feed with fan-out choices, durable post storage, eventual consistency and safeguards for celebrity …

• Why Kubernetes?

  … Configuration and sensitive values Config & Storage PersistentVolume Storage that outlives pods Config & Storage HPA Autoscaling pods based on …

• L — Liskov Substitution Principle

  … LSP (Barbara Liskov, 1987): Objects of a subtype must be replaceable for objects of the parent type without …

• Scaling, Load Balancing & Rate Limiting

  … Keep sessions in Redis or in tokens, files in object storage (S3), and state in the database. Scaling …

• Deployments, ReplicaSets & Rollouts

  … how objects find each other Labels are key/value tags on objects. Selectors pick objects by label. This …

• Caching & Redis

  … Treat it as a cache or as fast secondary storage, not as your only copy of critical data …

• Docker & Containers

  … a running instance of an image (like an object). You can run many from one image. - Registry: where …

• Authentication, Authorization & API Security

  … JWT, OAuth 2.0 and OpenID Connect, password storage, and the OWASP risks every backend developer must know …

• Clean Architecture in Depth

  … convert data between formats APIs, UI or storage formats change Use cases (and their ports) 🟣 Frameworks & drivers …