Trusted by 10,000+ engineers preparing for FAANG interviews

Crack System
Design

The free, open-source guide to designing systems that scale to millions of users.

55+
Topics
5
Chapters
1000+
Students Helped
100%
Free Content

New · Career guide

Forward Deployed Engineer (FDE)

Complete 2026 guide — role, skills, salary, interviews, and how to transition from backend or full-stack engineering.

Structured Roadmap
From fundamentals to case studies — follow a clear learning path
Track Progress
Mark topics complete, bookmark key sections, resume anytime
Interview Ready
Real case studies — design WhatsApp, Netflix, Uber & more

Watch the Complete Course

Visual explanations and deep dives on my YouTube channel.

Prefer reading? Get the same material as a downloadable ebook →

Take it with you

Full HLD & LLD in one ebook

Everything here stays free in the browser. The ebook is for offline study, last-minute review, and one continuous PDF-style flow you can mark up.

130+ topics aligned with this guide
Same depth as the web — a format that travels well for interviews
Get ebook on Topmate Instant access after checkout