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Everything you need to get through the filters and land offers.

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Connect IT Abyss to your AI chatPrepare for interviews right in Claude, ChatGPT, Claude Code or Codex.Interviews, quizzes and materials — one request in the chat.
Learn by the roadmapPrepare every topic the interview needs, from scratch.More than 15 programming languages, hundreds of topics and articles.
Level up in interviewsTake a real interview with real questions.Multiple choice, or a free answer checked by an AI agent — your call.
See your interview results in the statsFind out exactly what you don’t know.Precise stats for every session you run.
Tune your resume for ATSShape your resume so every recruiter reads it.More than 20 formatting rules and an automatic check that highlights the weak spots.
Work faster with AI skillsTeach your agent to build apps from scratch to release.Only the most useful and effective skills for Codex and Claude.
Read the blog and join the communityJoin the community and read the blog.Dozens of guides on job hunting, personal productivity and neural networks

IT Abyss in your AI chat

Questions, roadmap and courses on requestAsk about a topic and the assistant opens IT Abyss questions with answers, the roadmap topic or a course lesson.
Interviews and quizzes in the chatThe assistant asks IT Abyss questions and grades your answers by the same rubric as interviews on the site.
One progress with the siteAnswers from the chat count towards your stats, and the assistant sees where you make mistakes.

Works in

Claude
ChatGPT
Claude Code
Codex

ChatGPTIT Abyss

example

What do interviewers ask about Go channels?

IT Abysssearch go · "channels"

IT Abyss has channel questions at every level. Here are three:

What is a channel, and how do buffered and unbuffered channels differ?junior
Receive from, send to, and re-close a closed channel — what happens?middle
How do channels cause goroutine leaks, and how do you prevent them?senior

Show me the second one with its answer

IT Abyssget_question go · go-chan-closed-rules

IT Abyss · Gomiddle

Receive from, send to, and re-close a closed channel — what happens?

ch := make(chan int, 1)
close(ch)
v, ok := <-ch   // (1)
ch <- 1         // (2)
close(ch)       // (3)

(1)The receive returns v == 0, ok == false at once
(2)The send panics: send on closed channel
(3)Closing it again panics too: close of closed channel

Connect IT Abyss

Roadmap

Each block is a set of topics. Each topic takes one question and covers it from the basics to practice

Python roadmapFull roadmap

Data Types24 topics · 56 questions
Functions8 topics · 18 questions
Modules & Packages4 topics · 5 questions
OOP24 topics · 54 questions
Exceptions8 topics · 15 questions
Iterators & Generators8 topics · 19 questions
Decorators6 topics · 8 questions

Scenario: a Middle Python interview

Courses

All courses

C++ for Beginners

From your first program to classes, smart pointers, templates and a final project.

Free18 modules163 lessons37 exercises≈ 14 h

Start the course

Machine Learning from Scratch

Classical machine learning in Python, from numpy and pandas to models you can train, evaluate, tune and explain.

Basic19 modules217 lessons38 exercises≈ 15 h

Start the course

Go for Beginners

From your first program to slices, maps, structs, interfaces, errors, goroutines and a final project.

Free17 modules159 lessons34 exercises≈ 14 h

Start the course

Python Core

From your first program to strings, lists, dicts, functions, classes, exceptions, generators and a final project.

Free16 modules146 lessons31 exercises≈ 13 h

Start the course

JavaScript for Beginners

From your first program to arrays, objects, functions, closures, classes, errors, promises and a final project.

Free16 modules172 lessons47 exercises≈ 18 h

Start the course

Question graph

Every answer shows up in the graph. A node’s colour is the score of the answer in the interview simulator.

Pick your stack

Open the roadmap

Interview simulator

~3 min per question · 9, 21 or 45 questions

You answer in your own words — by text or by voice (beta).
Every question has key points. If a point isn’t fully covered, the interviewer asks a follow-up.
After the answer — a score out of 10 and a breakdown: what you covered and what you missed.
At the end of the session — your overall level and the topics worth revisiting.

AI · interviewer

Exceptions · Middle

How do the basic, strong and nothrow exception guarantees differ?

Start an interview

Progress

Every Quiz and AI interview answer is saved to your account and broken down by question, concept and topic. You can see which topics you’ve learned, where concepts sag, and what’s due for review.

C++62% completeGo41% complete

ExceptionsIn progress
quiz test12/18
AI interview64%
Move semanticsNeeds study
quiz test9/20
AI interview41%
Weak concept: “Move-only types” — AI score 4 of 10
MemoryLearned
quiz test22/24
AI interview86%

Open my progress

cv.pdfJob: Middle C++ Developerexample

John Doe

C++ Developer · Moscow

Experience

2021 — present · Developer¹

Responsible for developing backend services in C++².

Took part in performance optimisation³.

Skills

C++17, STL, Boost, Linux, Git⁴

About

Communicative, responsible⁵, a fast learner.

1CriticalNo company named — the ATS can’t match the experience to the job.
2Worth fixingNo result. Add a number: latency, RPS, savings.
3Worth fixingWhat exactly did you do, and to what effect?
4Worth fixingThe job lists CMake and gRPC; the resume doesn’t.
5PolishGeneric words — show it in your experience instead.

ATS resume checker

Upload your resume as PDF, Markdown or TXT — you’ll see your own text marked up: what keeps it from reaching a recruiter and how to rewrite it.

Weak resume

Target Job Fitgood
Experience and Resultswon’t pass
Format, Language and ATSstrong
Personal and Professional Datastrong

Check my resume

Skills for your LLM agent

Claude Code and Codex in one catalogueEvery plugin comes with ready install commands for Claude Code, Codex, or both agents.
Hand-picked and sorted by taskPlugins from different marketplaces, grouped into sections: learning, workflow, building agents and apps, stacks.
A detailed descriptionYou know what a plugin does before you install it.

Frontend designBuilding apps · frontend-design

Builds production-grade interfaces that avoid the generic AI look — distinctive layout, real typography, considered colour.

Install the plugin · Claude Code

/plugin marketplace add anthropics/claude-plugins-official

then

/plugin install frontend-design@claude-plugins-official

By Anthropic

Open the catalogue

Community

In the community I review resumes, answer questions and share insights.

The @it_abyss channel
News, guides, new material and announcements — every few days.
Open the channel
Subscriber chat
Telegram or Discord — talk, problem walkthroughs and support. Included in the subscription.
Pricing

From the blog

cppEN

5min read

C++ Safety in Production. Is It Really Being Replaced? And Why.

Breaking down the memory-safety hype, government initiatives pushing Rust, and what's actually happening at large companies — without panic or religious wars.

5 min readAugust 29, 2026

DX12

GamedevEN

6min read

Introduction to DirectX 12 Graphics Engine Development: Part 2

Deep dive into DirectX 12 resource management — textures, descriptors, descriptor heaps, constant buffers, pipeline state objects, root signatures, and swap chains.

6 min readMay 12, 2026

NewsAll news

Open the blog