jd five
Start
learning.jdfive.com

Learn with intent

Interview-grade courses for system design, low-level design, patterns, and AI agents — built like products, not note dumps.

Explore coursesView learning paths

8

Live courses

100+

Guides & breakdowns

4

Languages in patterns

1

Hub to rule them

Catalog

Courses

Each course is a dedicated site with syllabus, reader, and deep practice material.

Live

System Design

Delivery framework, core concepts, patterns, deep dives, and full problem breakdowns for senior interviews.

66 guides · HLDOpen
Live

Low Level Design

OOP, design principles, concurrency themes, and classic LLD walkthroughs interviewers actually ask.

2 tracks · OODOpen
Live

Design Patterns

GoF patterns explained clearly — wrong vs right, multi-language examples, and when not to use them.

13 patterns · 4 languagesOpen
Live

Build AI Agents

Learn to build AI agents from scratch — concepts, labs, and practical agent workflows.

Course · labsOpen
Live

Code (DSA)

Interview patterns for arrays, trees, graphs, heaps, and DP — learn the moves companies reuse.

122 guides · DSAOpen
Live

Java

Learn Java from zero: language, OOP, collections, JVM, and concurrency — write real code and crack interviews.

36 guides · Core JavaOpen
Live

Spring Boot

Spring Boot 3 from IoC and auto-config through web, JPA, security, testing, and production — plus interview Q&A.

15 guides · Spring Boot 3Open
Live

Networking

Packets to HTTPS, DNS, load balancers, and reliability — explain every hop between browser and service.

13 guides · TCP to edgeOpen
Coming soon

Behavioral

Story frameworks, big-tech behaviorals, and practice prompts for leadership signals.

Coming soon

Guided

Learning paths

Suggested sequences when you don’t want to invent the order yourself.

Senior interview track

System design → LLD → patterns. The core loop for mid/senior loops.

  1. 1System Design
  2. 2Low Level Design
  3. 3Design Patterns

AI builder track

Soon

Ship agent skills first, then fold in architecture depth as needed.

  1. 1Build AI Agents
  2. 2System Design
  3. 3Code

Foundations track

Soon

DSA and patterns before you jump into distributed design.

  1. 1Code
  2. 2Design Patterns
  3. 3LLD

Java backend track

Core Java first, then Spring Boot for real services and interviews.

  1. 1Java
  2. 2Spring Boot
  3. 3Design Patterns

Process

How it works

01

Pick a course

Open a track from the hub. Each course has its own syllabus and reader.

02

Learn in order

Follow the sequence — frameworks first, then concepts, then problem breakdowns.

03

Practice the hard parts

Revisit deep dives and designs until you can explain tradeoffs out loud.

jd five ideas to reality

Brand

Ideas to reality

jd five Learning is where preparation becomes a system: clear courses, honest depth, and a home page that gets out of the way once you pick a path.

Choose a course

FAQ

Questions

What is learning.jdfive.com?

A personal learning hub that links focused course sites for system design, LLD, design patterns, and AI agents — built for deliberate interview and on-the-job prep.

Are the courses free?

This hub is for personal study. Course access depends on how you host and share each site. Content quality is the priority, not a marketplace checkout.

Do I need to finish one course before another?

No. Start with the interview loop you have next. The Senior interview track is a suggested order, not a lock.

What does Coming soon mean?

Those tracks are planned next (for example DSA and behavioral). Live tiles already open full course sites.