AI, ML & LLMs: The Big Picture
What AI, ML, DL and LLMs actually are — and how they relate. Mental model first, no math.
The developer community for the AI era
Learn to engineer with AI. Prove it.
Free interactive lessons, hands-on practice tasks, and verified skill badges that show you can actually work with AI — not just talk about it. Built by developers, for developers navigating the AI era.
pepolon@dev:~$ whoami # A developer community shipping in the AI era. # Practice → prove → share. Free during launch.
ANverified
Ada Nowak
@adanowak · Warsaw
Pepolon Competency Model
Problem framingL3
AI orchestrationL3
Critical validationL4
AI-collaboration score72/100
Java · L3Spring Boot · L2Prompt Eng · L2+3
Pick your path
AI Engineering, Developers, DevOps, Testing — your Learn home focuses on what you do.
Interactive lessons
Readable lessons with syntax-highlighted code, diagrams, videos and inline quizzes.
Find your level
Optional entrance tests place you and point you to the right tracks.
Free during launch
Core tracks are free, and premium tracks are free during launch. Built by practitioners.
Flagship curriculum
AI Engineering for Developers
Eight chapters, in order, from the mental model to shipping in production — RAG, agents, fine-tuning, evaluation and safety. Written for developers, no ML background required.
Prompt Engineering
Talking to the model: system/user prompts, zero- vs. few-shot, structured output, injection safety.
Tokens, Embeddings & Vector Search
How text becomes tokens, and how meaning becomes searchable vectors.
Build a RAG Application
Retrieval-augmented generation end to end: chunking, grounding, citations.
Tool Use & AI Agents
An LLM as a reasoning engine that calls tools, plans, and acts safely.
Fine-tuning & LoRA
When to fine-tune vs. prompt or RAG — and how LoRA makes it practical.
Evaluation, Safety & Guardrails
Knowing it works: golden sets, judges, drift — plus guardrails and injection defense.
Productionizing
Shipping AI features: cost, latency, observability, and reliability in production.
Interactive lessons — read the material, check yourself with inline quizzes, find your level with an optional entrance test. Free.
Learn
AI-era engineering, from practitioners
Real workshops on shipping AI systems that work — with the pitfalls no one else talks about.
Prove
Verified badges tied to real behavior
Every badge earned in a monitored session on model-calibrated tasks. No multiple choice, no auto-passes.
Get noticed
Employers on Pepolon discover you
Your verified profile is portable proof of skill — visible to recruiters only with your permission.
Your identity
A profile that proves what you can do
Not another list of self-reported skills. Each level and badge is earned in a monitored session, backed by evidence, and yours to share or keep private — a six-dimension competency scorecard, per-skill levels, and an AI-collaboration score.
I got tired of watching great developers fail poorly designed hiring tests, while people who could ace an interview but couldn’t consistently deliver got hired. Pepolon is what I wish existed to measure what actually matters.
Hosts the AI Engineering series
Get started
Ready to prove what you can do?
Core tracks are free, and premium tracks are free during launch. Learn AI-era engineering, practice on real tasks, and earn verified proof of skill.
no credit card · no spam