30 days to crack the AI interview loop
Skillumen is a 30-day LLM interview bootcamp for aspiring AI engineers. Become an AI engineer — master RAG, agents (LangGraph/MCP), evals & LLMOps, and system design — through lessons, hands-on build labs, and AI voice mock interviews. Learn it, build it, rehearse it, ship it, without ever leaving the page.
See how it works · Foundations is free forever — no credit card to start.
Three moves, repeated until it's automatic
Learn by retrieving
You don't re-read — you retrieve. Every concept opens on a question; answer in your head, then flip and an AI grades you in your own words. Spaced repetition schedules the next hit, and each card opens into a full deep dive.
Build it by hand
An in-browser Python IDE takes you from the basics all the way to a deployment capstone — from a softmax to a LangChain RAG chain — with zero local setup.
Rehearse out loud
AI voice mock interviews put you on the spot and score your answers in real time, on quick daily drills or a full timed mock — just like the real room.
Four tools, one platform
- Active-recall cards — with an AI tutor and deep dives. Retrieve the answer, get AI-graded, and let spaced repetition schedule the next review.
- Code arena — a built-in Python IDE. Read the problem, write the solution, run live tests. Build real things by hand, from a softmax to a RAG chain.
- Live voice mock interviews — speak your answers to an AI interviewer, scored and corrected in real time.
- A real RAG capstone — a 5-part project on a live LangChain kernel: build retrieval, add agents (LangGraph, MCP), make it trustworthy with evals, and ship it with FastAPI. A real project you can talk through in any interview.
Foundations → Applied → Advanced. In order.
Foundations — free forever: how LLMs work under the hood, text becomes tokens, tokens become vectors, vectors become predictions. The real platform, not a locked demo.
Applied (₹1,499) — turn the fundamentals into working systems: attention at scale, RAG, tool use, and how to evaluate what you build. Includes 2 AI voice interviews per month plus unlimited tailored interview drills.
Advanced (₹2,999) — ship it: quantization, efficient serving, deployment, and the systems-design thinking interviews probe hardest. Includes 5 AI voice interviews per month, unlimited tailored drills, and real-gap interview question banks.
The questions that end interviews. You'll have answers.
- The retriever finds the right doc but the model still hallucinates — what do you check? (chunking, reranking, context order, grounding)
- RAG vs fine-tuning vs long-context — when do you reach for which?
- How do you evaluate a RAG system with no ground-truth labels? (LLM-as-judge, RAGAS, faithfulness)
- Walk me through a tool-calling agent — and where it breaks. (tool-calling, LangGraph, MCP, agent memory)
Before you commit
Is AI engineering still hiring? Demand still outruns supply for people who can actually build — employers want a shipped RAG or agent project, not one more certificate. This is applied engineering, not research: if you can write Python you're in.
Foundations is free forever — the real platform, not a locked demo. Go deeper with Applied or Advanced when you're ready. No lock-in, no sales call.