BetaLaunching Q2 2026

MASTER ENGINEERINGBY BUILDING THE CORE

Stop watching tutorials. Build Redis, Docker or Git
from scratch. Real systems, real skills.

Be among the founding engineers

Free early access

At launch

Your IDE & terminal

Multi-language

Real-time test streaming

Docker-isolated

Rebuild from scratch

RedisDockerGitHTTP ServerDNSShellSQLiteBitTorrentLoad Balancer+ more coming

pipeline

git push

build

stream

passed

+XP

Early Access

Opening by waves

Your learning path

Completed

Algorithmic Mastery🦀Rust

Master HashMaps, Trees, and Big O notation. The absolute foundation for any engineer.

12 stages 2h 500 XP

Done

Completed

Build your own Shell🐹Go

Interact directly with the Kernel. Implement PIPES, REDIRECTIONS, and Process Signals.

8 stages 4h 800 XP

Done

In Progress

Build a BitTorrent Client🦀Rust

Decode Bencode, manage peer handshakes, and implement a distributed download pipeline.

Stage 5/1442%

14 stages 10h 1200 XP

Running

Paused

Build your own SQLite🦀Rust

Dive into B-Tree structures, page caching, and write a SQL query parser from scratch.

16 stages 12h 1500 XP

Locked

Build your own Docker 3

Master Linux Namespaces, Cgroups and Layered Filesystems to build a container engine.

15 stages 15h

Locked

Build your own Kafka 3

Understand distributed logs, leader election, and high-throughput replication protocols.

12 stages 14h

Platform

Everything Connected

Skill trees, challenges, languages, and progression — all linked in a system designed for engineers who build.

Skill Trees

Path

Backend Architecture12 courses

Systems Programming8 courses

Network Fundamentals6 courses

4 More Trees

Challenges

Core

Build RedisHard

Build GitExpert

Build DockerMedium

5 More Challenges

Languages

Multi

Rust

Python

3 TypeScript, C, Zig

Progression

RPG

XP & Levels

Daily Streaks

Achievements

CommonRareEpicLegendary

Start building
real tools.

Clone → Code → Push → Score → Level up. Five facets of mastery, one seamless pipeline.

Start for free View challenges

Developers from world-class companies

GoogleMetaAmazonStripeCloudflareVercelNetflixUberAirbnbSpotifyGoogleMetaAmazonStripeCloudflareVercelNetflixUberAirbnbSpotify

Feedback Engine

Push code.
Get Smart.

Stop guessing why your tests fail. Our engine dissects your stack traces and guides you toward the fix — without ever spoiling it.

features

Deep Analysis

Static & runtime analysis on every push.

AI Mentor

Contextual hints based on your exact errors.

Live Streaming

Real-time test logs delivered via SSE.

XP Rewards

Earn points for every bug you squash.

Code Quality

98 / 100

● Live

Challenges

Real systems. No toys.

You use Redis, Docker, and Git every day. But could you rebuild them from scratch? That's devcraft.

Featured Challenge

Live Preview

Build Your Own Redis

Strings, expiry & persistence from scratch

Rust

STAGE 1Bind to a port

STAGE 2Respond to PING

STAGE 3Handle concurrent

STAGE 4Implement ECHO

STAGE 5SET & GET commands

100

STAGE 6Key expiry

100

STAGE 7Persistence (RDB)

150

Stage 4/743%

7 stages~4h6 langs600 XP

3/7

No videos. No fake editors. You clone, you code, you push. Our engine does the rest.

Platform Features

Built for Serious Engineers

Everything you need to go from junior to senior — no shortcuts, no hand-holding.

Low-Level Implementation

Write raw TCP servers, binary protocols, B-trees. No abstractions hiding the real work.

server.c

int sock = socket(AF_INET, SOCK_STREAM, 0);

bind(sock, &addr, sizeof(addr));

listen(sock, SOMAXCONN);

while(1) {

int client = accept(sock, NULL, NULL);

handle_conn(client);

}

Battle-Tested Suites

Edge cases, stress tests, race conditions. Your code must survive them all.

test runner

✓TCP handshake2ms

✓Empty payload1ms

✗Race conditiontimeout

✓Stress 10k conn48ms

3 passed1 failed

Distributed Systems

Consensus, sharding, replication. Real distributed engineering.

Leader

Synced

Lagging

Streak System

Build daily coding habits that compound. Never break the chain.

🔥 6

Achievements & XP

Earn experience, unlock badges, climb the global leaderboard.

⚡First Blood🔥On Fire💎Diamond

Lv.12

2,450 XP

Any Language

Rust, Go, Python, C++, TypeScript, Java, Zig — your weapon, your rules.

RustGoPythonC++TSJavaZig

Write in your language of choice

Rust

Python

TypeScript

C++

Java

Ruby

Zig

PHP

JavaScript

Shell scripts

SQL

Rust

Python

TypeScript

C++

Java

Ruby

Zig

PHP

JavaScript

Shell scripts

SQL

The Workflow

Simple. Powerful.

Four steps from clone to mastery. No setup, no friction.

Step 01

Choose Your Challenge

Pick a challenge and your language. Clone the starter repo — one command, zero config.

$git clone devcraft://redis

Step 01

Choose Your Challenge

Pick a challenge and your language. Clone the starter repo — one command, zero config.

$git clone devcraft://redis

Step 02

Implement the Stage

Work in your local IDE. Write real code to pass real test cases, one stage at a time.

$nvim src/main.rs

Step 02

Implement the Stage

Work in your local IDE. Write real code to pass real test cases, one stage at a time.

$nvim src/main.rs

Step 03

Push & Get Feedback

Push your code. If tests fail, get AI-powered hints instantly. Iterate until green.

$git push devcraft main

Step 03

Push & Get Feedback

Push your code. If tests fail, get AI-powered hints instantly. Iterate until green.

$git push devcraft main

Step 04

Score & Progress

Aim for 90/120 to pass — or crush 120/120 for mastery. Climb the leaderboard.

$// Score: 108/120 ✓ Passed!

Step 04

Score & Progress

Aim for 90/120 to pass — or crush 120/120 for mastery. Climb the leaderboard.

$// Score: 108/120 ✓ Passed!

Freemium Access

Accessible to Everyone.

Quality education shouldn't have barriers. Start free, grow at your pace.

Scoring System

Flexible progression

Every challenge is scored out of 120. Pass with 90 points minimum — chase 120 for mastery.

0/ 120

90 Pass

110 Excellence

120 Mastery

Free Tier

Everything you need to start

Free

Almost All Challenges Free

Access most challenges at zero cost. Only a few exclusives.

Free

AI-Powered Hints

Personalized hints based on your code. Understand, don't copy.

Free

Progress Tracking

XP, streaks, achievements. Gamified learning that sticks.

Pro Upgrade

Unlock the full potential

Pro

Usage Limits

Free tier has hourly limits on runs. Upgrade for unlimited.

Pro

Priority Queue

Pro users skip the queue for instant execution.

Pro

Solution Access

View community and official solutions after passing.

Start for free. Upgrade when you need more power.

Why DevCraft

Not another tutorial.

See how DevCraft compares to what you've already tried.

Feature	DevCraft	LeetCode & co.	Video Courses	Bootcamps
Build real systems (Redis, Git, DNS…)
Work in your own IDE & local tools
AI-powered hints on your exact code
Real git workflow (clone → push → feedback)
Systems-level depth (TCP, binary, concurrency)
Any programming language
Automated test suite on every push
Self-paced, no schedule
Portfolio-worthy projects
Free to start
Score	10/10	3/10	2/10	2.5/10

Full support

Partial

Not available

Built for developers, by developers

READY TO
LEVEL UP?

Stop dreaming about becoming a senior engineer. Start building the systems that will get you there.

No credit card required • Start free • Open source friendly

MASTER ENGINEERINGMASTER ENGINEERINGBY BUILDING THE COREBY BUILDING THE CORE

Everything Connected

Start buildingreal tools.

Push code.Get Smart.

Real systems. No toys.

Built for Serious Engineers

Low-Level Implementation

Battle-Tested Suites

Distributed Systems

Streak System

Achievements & XP

Any Language

Write in your language of choice

Simple. Powerful.

Choose Your Challenge

Choose Your Challenge

Implement the Stage

Implement the Stage

Push & Get Feedback

Push & Get Feedback

Score & Progress

Score & Progress

Accessible to Everyone.

Flexible progression

Almost All Challenges Free

AI-Powered Hints

Progress Tracking

Usage Limits

Priority Queue

Solution Access

Not another tutorial.

READY TOLEVEL UP?

MASTER ENGINEERINGBY BUILDING THE CORE

Start building
real tools.

Push code.
Get Smart.

READY TO
LEVEL UP?