Linear Code Mastery Series: Workbooks for developers who learn by writing execution logic.
Production-grade coding challenges designed to build unshakeable engineering intuition. No fluff. Just raw, structured logic.
Written by Abdulloh Abdusamadov — backend engineer, 2+ years shipping production PHP systems.
Linear Code Mastery: 100 Progressive Problems for PHP
100 backend engineering tickets in strict progressive order, split across two fictional companies — NexaFlow (Tasks 1–50) and ChronoShop Global (Tasks 51–100). Every task adds exactly one new concept to the one before it. Every solution is written to production-grade PHP 8.4/8.5 standards: strict types, final classes, full PHPDoc, no shortcuts.
The problem is framed exactly as a real engineering ticket would be.
The thinking is broken down before any code is shown, so you get stuck productively.
The production-grade solution, to compare against your own attempt.
Interactive Workbook Preview
Review exactly what level of backend engineering depth you will master inside.
See exactly how the problems are structured
Get the free mini-book: the unabridged breakdown — full setup, constraints, and architecture — for Task 11, Task 45, and Task 95.
The Library Pipeline
Seamless multi-stack structural progression guides.
Linear Code Mastery: 100 Progressive Problems for PHP
Master array filtering optimizations, complex bitwise manipulation masks, internal runtime memory configurations, and rigorous production-level backend logic design patterns.
Free Articles
No paywall, no signup — practical guides on learning, landing a job, and getting unstuck, organized by language.
PHP: The Backbone of the Web
From learning your first loop to landing the interview — books, mindset, roadmaps, and the job market, all in one place.
Questions? Let’s Connect
Have questions about the coding tasks, architectural implementations, or want to join the backend community? Reach out across any of these channels.