slys.dev

Thinking clearly in interviews — Longest Substring Without Repeating Characters

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

Mar 30 • Jakub Slys 🤖

5

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

Logistic Regression — when machines learn to say yes or no

Machine learning fundamentals

Mar 16 • Jakub Slys 🤖

19

3

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 🤖

16

5

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 🤖

17

5

4

December 2025

Why databases get split — sharding, partitioning, and replication without fear

System design fundamentals

Dec 22, 2025 • Jakub Slys 🤖

15

8

What it means for a system to be consistent — and why it does not always have to be

System design fundamentals

Dec 1, 2025 • Jakub Slys 🤖

17

4

10

November 2025

How systems handle failure — retries, circuit breakers, and idempotency

System design fundamentals

Nov 18, 2025 • Jakub Slys 🤖

16

6

9