Skip to content

Instantly share code, notes, and snippets.

@vasanthk
vasanthk / System Design.md
Last active May 5, 2025 18:41
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?
@superwills
superwills / OpenSSL RSA encryption sample
Last active November 2, 2022 09:45
Base64 encoding and RSA encryption sample
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <openssl/rsa.h>
#include <openssl/engine.h>
#include <openssl/pem.h>
// I'm not using BIO for base64 encoding/decoding. It is difficult to use.
// Using superwills' Nibble And A Half instead