Kodexing
Sign inSign up
AI-first coding education

Learn to code. Ship real software. Get hired.

Train a neural network from scratch. Watch a transformer think, token by token. Compete in a live cohort. Kodexing is the practice ground where the work you do is the work you’ll be paid for.

  • 632 services catalogued
  • 8 cohort leagues
Inside Kodexing

Real screens. Sample data.

The interfaces below are the product — the same components, the same layout, rendered from the same code. Everything inside them is sample data: Kodexing is pre-launch, so the streak, the XP and the cohort rank are here to show you the shape of the thing, not to claim it already happened. The trainer itself is live once you are in.

kodexing.com/sim/neural
Neural Network Trainer
Training · Sharpening the boundary Pause Reset
Dataset
Spiral
Hidden layers
L1 · 5 L2 · 5
Activation
tanh
Learning rate
0.30
Speed
2×
Add layerTrain

Architecture 2 → 6 → 4 → 1 · 51 trainable params.

Epoch
1,284
Loss (BCE)
0.0417
Accuracy
97.6%
Learning rate
0.30

Decision boundary

Class 1Class 0

Network diagram

Forward + backprop

Loss (BCE)

↓ 0.0417
What you actually build

Studios, not tutorials.

Every studio exists to move you from “I finished a course” to “I shipped this, and here’s the code.”

  1. 01

    Neural Network Trainer

    Build a real MLP layer by layer and watch forward-prop, backprop and gradient descent sharpen the decision boundary — live.

    /sim/neural
  2. 02

    LLM Simulator

    Watch a prompt travel through a transformer: tokenize, embed, context window, attention heads, blocks, generate.

    /sim/llm
  3. 03

    Prompt Engineering Lab

    A/B two prompts against the real model. Compare quality, tokens, cost and latency side by side.

    /sim/prompt
  4. 04

    Data Modeling Studio

    Upload a CSV, X-ray every column, then train real models and score them honestly against an always-guess baseline.

    /sim/data
  5. 05

    FlowCoder AI

    Draw the logic on a canvas, generate real code, then step through execution and watch your variables change.

    /coding/flow
  6. 06

    Project Builder

    Design multi-cloud systems from a 632-service catalogue with live cost, carbon and a 9-axis resilience score.

    /builder
  7. 07

    Anytime Code

    A never-repeating practice library: every question lives in exactly one place, so you never solve the same problem twice.

    /coding/atc
  8. 08

    AI Coding Lab

    A real editor with an AI mentor that explains, fixes, optimises and hints — plus a static security review of your code.

    /coding
  9. 09

    Career Hub

    An AI resume builder, AI company briefs, and a career score derived from what you've actually done here — the last mile to hired.

    /career-hub

How Kodexing works

What actually happens after you create an account.

  1. Pick your track

    Your first screen asks for three things: category, branch, target exam. The Learning Hub loads the matching subjects and syllabus from there, and teaches them as slide lessons you move through at your own pace.

    /courses

  2. Build in a studio

    Reading stops here. Draw logic on the FlowCoder canvas and it compiles to real code you can step through line by line. Design a system in Project Builder against a catalogue of 632 services, scored for cost and resilience as you place them.

    /builder

  3. Compete, and get hired

    Weekly XP places you in a cohort of peers across eight leagues — top of the table promotes, bottom drops. The Career Hub turns the work into what hiring actually asks for: a resume, company research, and a career score built from what you shipped.

    /leaderboard
Cohorts

You don’t learn alone. You climb.

Earn XP each week and you’re placed in a small cohort of peers: top of the table promotes, bottom drops, across eight leagues.

  1. Bronze
  2. Silver
  3. Gold
  4. Platinum
  5. Diamond
  6. Master
  7. Grandmaster
  8. Legend

Start free. When you want the full studio set, see the plans.