Your services talk to each other like strangers on the internet

REST at the edge. gRPC inside.

Oct 2 • Franco Fernando

10

2

September 2026

The most dangerous change to a published API is a rename

Diff the spec. Fail the build.

Sep 25 • Franco Fernando

7

1

You can refactor everything except your API

Coupling, not naming. First article on API design.

Sep 18 • Franco Fernando

24

1

3

Latency: What It Is and What Limits It (Part II)

Where delays hide in the stack, how they add up, and how to measure them.

Sep 11 • Franco Fernando

9

3

Latency Is Not a Single Number

What latency really is. The physics and math that bound it, and why the average always lies.

Sep 4 • Franco Fernando

11

2

August 2026

Exception Handling in Practice

Patterns and anti-patterns for signaling, catching, and surviving failures in your code.

Aug 28 • Franco Fernando

13

3

Logistic Regression

How a classification model learns to predict probabilities instead of flat yes/no answers.

Aug 21 • Franco Fernando

8

1

Disjoint Sets: From Linear to Almost Constant Time

Tracking which items belong to the same group looks trivial, until your inputs get big.

Aug 14 • Franco Fernando

6

1

IP Addressing, Part III: Inside the IP Packet

What actually travels on the wire: the IPv4 header, fragmentation, and what IPv6 changed.

Aug 7 • Franco Fernando

12

1

IP Addressing, Part II: Scaling IPv4 Across the Internet

How classful addressing gave way to CIDR, and how private addresses and NAT kept the world from running out of IPv4.

Aug 1 • Franco Fernando

9

2

July 2026

The Anatomy of an IPv4 Address (Part I)

How an IPv4 address is built, what a subnet mask does, and how a device determines the network it belongs to.

Jul 25 • Franco Fernando

17

3

The Perceptron

How the simplest classification model works, and why it is the building block of every neural network.

Jul 18 • Franco Fernando

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4