Systems & Low-Level

High-performance systems programming with C++, Rust, C, Bash, and Lua.

16Levels

0Passed

Level 1Beginner

C, C++ & Rust Fundamentals: Memory, Types & Ownership

Document structure, tags, semantic elements, forms, links, images, and accessibility fundamentals.

4 hrs

Level 2Beginner

Pointers, References & Manual Memory Management

Selectors, cascade, specificity, box model, Flexbox, Grid, and responsive design media queries.

5 hrs

Level 3Beginner

Data Structures & Algorithmic Complexity in Low-Level Code

Variables, types, functions, arrays, objects, DOM manipulation, and event handling.

6 hrs

Level 4Intermediate

Systems Programming: Processes, Threads & Syscalls

Event loop, promises, async/await, fetch API, handling HTTP errors, and JSON processing.

3 hrs

Level 5Intermediate

Concurrency, Atomics & Lock-Free Programming

Interfaces, types, generics, type narrowing, union types, and TS configuration.

4 hrs

Level 6Intermediate

Build Systems: Make, CMake & Cargo

JSX, props, state, component lifecycle, synthetic events, and controlled inputs.

5 hrs

Level 7Intermediate

Networking: Sockets, TCP/IP & Protocol Implementation

useEffect, useRef, useMemo, useCallback, custom hooks, and memory leak prevention.

6 hrs

Level 8Intermediate

Internals: Linkers, Loaders & ELF/PEE Binary Formats

Prop drilling solutions, Context API, Redux Toolkit / Zustand, and persistent state.

3 hrs

Level 9Intermediate

Performance Engineering: Caching, Branch Prediction & SIMD

React Router, URL params, nested layouts, protected routes, and lazy loading pages.

4 hrs

Level 10Intermediate

Security: Buffer Overflows, Memory Safety & Exploit Defense

Tailwind utility workflow, custom theme config, CSS modules, design tokens, and CSS-in-JS.

5 hrs

Level 11Advanced

Operating System Concepts: Scheduling, Virtual Memory & I/O

React Hook Form, Zod schemas, complex form state, field validation, and error feedback.

6 hrs

Level 12Advanced

Embedded Systems & Bare-Metal Programming

TanStack Query (React Query), caching, optimistic updates, invalidation, and SWR.

3 hrs

Level 13Advanced

File Systems, Storage Engines & Low-Level I/O

LCP, CLS, INP, bundle optimization, dynamic imports, image formats, and lighthouse profiling.

4 hrs

Level 14Advanced

Assembly, Calling Conventions & ABI Design

XSS, CSRF, CSP, CORS, SameSite cookies, JWT storage, localStorage, and IndexedDB.

5 hrs

Level 15Expert

Cross-Platform Systems Libraries & FFI

Vitest, Jest, React Testing Library, Playwright E2E, mocking network calls, and coverage.

6 hrs

Level 16Expert

Production-Scale Low-Level Infrastructure Engineering

Module Federation, Next.js App Router SSR/SSG, ISR, Edge functions, and design systems at scale.

3 hrs

Systems & Low-Level

High-performance systems programming with C++, Rust, C, Bash, and Lua.

16Levels

0Passed

Level 1Beginner

C, C++ & Rust Fundamentals: Memory, Types & Ownership

Document structure, tags, semantic elements, forms, links, images, and accessibility fundamentals.

4 hrs

Level 2Beginner

Pointers, References & Manual Memory Management

Selectors, cascade, specificity, box model, Flexbox, Grid, and responsive design media queries.

5 hrs

Level 3Beginner

Data Structures & Algorithmic Complexity in Low-Level Code

Variables, types, functions, arrays, objects, DOM manipulation, and event handling.

6 hrs

Level 4Intermediate

Systems Programming: Processes, Threads & Syscalls

Event loop, promises, async/await, fetch API, handling HTTP errors, and JSON processing.

3 hrs

Level 5Intermediate

Concurrency, Atomics & Lock-Free Programming

Interfaces, types, generics, type narrowing, union types, and TS configuration.

4 hrs

Level 6Intermediate

Build Systems: Make, CMake & Cargo

JSX, props, state, component lifecycle, synthetic events, and controlled inputs.

5 hrs

Level 7Intermediate

Networking: Sockets, TCP/IP & Protocol Implementation

useEffect, useRef, useMemo, useCallback, custom hooks, and memory leak prevention.

6 hrs

Level 8Intermediate

Internals: Linkers, Loaders & ELF/PEE Binary Formats

Prop drilling solutions, Context API, Redux Toolkit / Zustand, and persistent state.

3 hrs

Level 9Intermediate

Performance Engineering: Caching, Branch Prediction & SIMD

React Router, URL params, nested layouts, protected routes, and lazy loading pages.

4 hrs

Level 10Intermediate

Security: Buffer Overflows, Memory Safety & Exploit Defense

Tailwind utility workflow, custom theme config, CSS modules, design tokens, and CSS-in-JS.

5 hrs

Level 11Advanced

Operating System Concepts: Scheduling, Virtual Memory & I/O

React Hook Form, Zod schemas, complex form state, field validation, and error feedback.

6 hrs

Level 12Advanced

Embedded Systems & Bare-Metal Programming

TanStack Query (React Query), caching, optimistic updates, invalidation, and SWR.

3 hrs

Level 13Advanced

File Systems, Storage Engines & Low-Level I/O

LCP, CLS, INP, bundle optimization, dynamic imports, image formats, and lighthouse profiling.

4 hrs

Level 14Advanced

Assembly, Calling Conventions & ABI Design

XSS, CSRF, CSP, CORS, SameSite cookies, JWT storage, localStorage, and IndexedDB.

5 hrs

Level 15Expert

Cross-Platform Systems Libraries & FFI

Vitest, Jest, React Testing Library, Playwright E2E, mocking network calls, and coverage.

6 hrs

Level 16Expert

Production-Scale Low-Level Infrastructure Engineering

Module Federation, Next.js App Router SSR/SSG, ISR, Edge functions, and design systems at scale.

3 hrs