The T-Shaped Dev

How to Stop Charging Customers Twice: A Practical Idempotency Guide

Idempotency in plain English: HTTP, message queues, and the one detail that decides whether it's real.

Jun 9

13

May 2026

My Frontend Stack In 2026

The tools I actually reach for when building production apps, from framework to the moment a user hits a bug.

May 23

54

1

4

Stacked PRs: The Code Review Workflow That Changed How I Ship Features

Stacked diffs, the workflow Meta and Google ship on. (7 min)

May 13

20

3

3

20 Mistakes That Quietly Destroy JavaScript/TypeScript Codebases (Part 2)

Common JS/TS patterns that feel fine until they don't. 11 mistakes, before/after code for each. (11 min)

May 9

16

20 Mistakes That Quietly Destroy JavaScript/TypeScript Codebases (Part 1)

Common JS/TS patterns that feel fine until they don't. 11 mistakes, before/after code for each. (11 min)

May 2

37

6

4

April 2026

ES2025 Features You Should Actually Use

Learn about eight features you must adapt today in your production codebase. (9 min)

Apr 22

22

3

1

Vertical Slice Architecture in Node.js: One Folder Per Use Case

Why organizing by domain module isn't enough and what to do instead. (8 min)

Apr 11

25

2

2

March 2026

Dependency Injection in Node.js & TypeScript. The Part Nobody Teaches You

Learn the hidden costs about importing everything directly and the structural change you need to make. (8 min)

Mar 29 • Petar Ivanov

40

4

4

Screaming Architecture & Colocation: Let Your Project Structure Tell the Story

Learn why you should organize your code by what your app actually does, not by technical roles. (5 min)

Mar 14

19

6

February 2026

4 Disciplines That Separate Effective Engineers From Busy Ones

Learn about the daily habits that help engineers be more effective. (7 min)

Feb 24

31

2

8

Database Design Doesn't Start With Table. It Starts With Consequences

Here's what most backend engineers get wrong about schema design and how to fix it before you hit production. (6 min)

Feb 17

64

5

7

January 2026

Invite Your Friends & Earn Rewards 🎁

Announcing the T-Shaped Dev Referral Program! 🎉

Jan 27 • Petar Ivanov

9