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Lessons (9)

• API Gateway, BFF & Service Discovery

  … A BFF is a small backend tailored to one frontend , owned by that frontend team. mermaid flowchart LR …

• Graphs: BFS & DFS

  … The ripple reaches everything 1 step away, then 2 steps, then 3… BFS explores level by level using …

• Stacks & Queues

  … go deep first"] d1[A] -- d2[B] -- d3[D] end subgraph BFS["Queue → BFS: level by level"] b1 …

• DSA Interview Patterns Cheat Sheet

  … br/ grid, network, dependencies} C -- shortest path / levels BFS[BFS] C -- explore all / connected / cycles DFS[DFS] C …

• REST vs GraphQL vs gRPC

  … gRPC between internal microservices, a GraphQL or BFF (Backend for Frontend) layer for their apps, and REST for …

• Trees & Binary Search Trees

  … pre-, in-, post-order (DFS) and level-order (BFS with a queue). - In-order traversal of a BST …

• I — Interface Segregation Principle

  … applies at a larger scale: - Backend for Frontend (BFF): a mobile app and a web app each get …

• Frontend Security

  … session=abc123; HttpOnly; Secure; SameSite=Lax; Path=/; Max-Age=86400 💡 A popular pattern is the BFF (Backend for …

• Data in Microservices: Sagas & the Outbox Pattern

  … Options: Approach How Trade-off --- --- --- API composition A BFF/gateway calls each service and joins in memory Simple …