Engineer · Author · CodePop founder

Aleksandar Popovic

Build useful things. Understand how they work. Explore practical AI workflows, read complete engineering books, and inspect the open-source systems behind the ideas.

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Introducing AI Lab

Make AI part of
your everyday work.

Practical guides, slash-command references, and workflows for the tools you actually use. Start with a command. Leave with a useful next step.

Explore the AI library

Try a hands-on workshop →

GChatGPT/planCxCodex/diffClClaude Code/contextGeGemini CLI/memoryCuCursor/askCoGitHub Copilot/tests

Choose your way in

Follow your curiosity.

A deep dive, a small idea, or a walkthrough.
There’s more than one way to learn.

Read & explore

Go deeper
with a book.

Complete engineering books. Read online or take a PDF or EPUB with you.

6 complete books
Think & try

One idea.
A useful next step.

Practical field notes and AI guides, with something to put to work.

38 notes & guides
Watch & learn

Watch it
come together.

Follow the thinking and the code, one video at a time.

Explore the video library
Aleksandar Popovic

Current signal

@alekpopovic

Serbia

Company
SpotHopper
Profile
Explore my open-source work ↗
Focus
AI workflows, open source, reliable systems

Selected work

Tools with
clear edges.

Container orchestration

orch

A Go control plane and worker agents for operating small Docker clusters.

Kubernetes CI/CD

cloudivision

Kubernetes-native builds and observable delivery through GitOps.

Platform infrastructure

ClusterForge

Readable Terraform/OpenTofu modules and a Go CLI for container platforms.

Docker over SSH

ContainerDesk

A native Linux and macOS workspace for remote Docker hosts over SSH.

The engineering bookshelf

Read it. Build it.

All books ↗

Want a starting point? Follow a learning path →

Field notes

A small idea.
A useful next step.

All posts
orch
Verification3 min read

Follow a resource limit all the way to Docker

A valid resource field and a tested scheduler do not prove that a running container receives the corresponding CPU and memory controls.

Read the note
orch
Reliability3 min read

An offline node is not proof that its workload stopped

Heartbeat expiry supports a replacement decision, but preventing a disconnected workload from continuing requires a separate authority boundary.

Read the note
CxCodexWorkshop
Code review3 min read

AI workshop: reject stale deployment evidence

Build a deployment decision in three stages: check identity, reject stale observations, and keep the decision independent of sensitive diagnostics.

Intermediate · Codex CLI · Browser exercise

Read the guide
CxCodexWorkshop
Verification3 min read

AI workshop: recover an ordered tenant stream

Repair a reconnect reducer that trusts every message. Check snapshot identity, duplicate delivery, sequence gaps, and atomic recovery with eight acceptance tests.

Intermediate · Codex CLI · Browser exercise

Read the guide

How I work

Make the system smaller in your head.

01

Name the shape

Find the pattern before adding machinery.

02

Extract the useful bit

Turn repetition into a tool, gem, or generator.

03

Keep it readable

Favor code that can be re-entered later.

Engineering studio

Building products and the systems behind them.

Agency

CodePop

An engineering studio for custom web apps, mobile apps, APIs, cloud infrastructure, DevOps pipelines, and architecture work.