slys.dev

I taught Claude to read my Substack — here's the gateway behind it

Five repos, one contract, and what vibe coding done well actually means

Jun 8 • Jakub Slys

32

11

3

May 2026

Decision Trees — how machines learn by asking questions

Machine learning fundamentals

May 27 • Jakub Slys

26

8

3

CQRS — when Reads and Writes take different paths

System design fundamentals

May 20 • Jakub Slys

34

11

2

March 2026

Thinking clearly in interviews — Longest Substring Without Repeating Characters

Understanding the why before the code (Rust · Python · Scala)

Mar 30 • Jakub Slys

6

3

Why is my LoadBalancer still <pending>?

How Cilium's LB IPAM and L2 Announcements turn a pending LoadBalancer Service into a reachable VIP on your LAN.

Mar 23 • Jakub Slys

2

2

Logistic Regression — when machines learn to say yes or no

Machine learning fundamentals

Mar 16 • Jakub Slys

21

5

Thinking clearly in interviews — Add Two Numbers

Understanding the why before the code (Rust · Python · Scala)

Mar 9 • Jakub Slys

4

6

How Load Balancing really works — and why it is not just about splitting traffic

System design fundamentals

Mar 3 • Jakub Slys

17

6

February 2026

Linear Regression — the heartbeat of Machine Learning

Machine learning fundamentals

Feb 23 • Jakub Slys

4

7

Thinking clearly in interviews — Two Sum

Understanding the why before the code (Rust · Python · Scala)

Feb 16 • Jakub Slys

3

1

How systems find each other — Service Discovery without magic

System design fundamentals

Feb 10 • Jakub Slys

6

1

January 2026

How to learn System Design without getting overwhelmed

A beginner-friendly roadmap of blogs, books, and experts to help you go from confused to confident

Jan 5 • Jakub Slys

18

6

7