Modern Java 21Backend-readyHands-on labsProject-first

Java video courses
built for real dev work

JavaDevsMastery is a structured path from clean fundamentals to production-grade practices: concurrency, performance, APIs, data access, testing, and delivery.

Launch JavaExplore curriculum

Format

Video + labs

Focus

Backend

Pace

Self-paced

JavaDevsMastery Console

$ javac App.java

$ java App

Output:

HTTP server started on :8080

Healthcheck: OK

Next up

Build an API + tests + deploy

Course curriculum

6 pillars that upgrade your Java

No fluff. Each block is designed to connect theory to production-oriented practice.

Core Java, done right

A clean, modern foundation: types, collections, streams, records, and practical patterns.

Concurrency & performance

Threads, executors, structured concurrency concepts, profiling mindset, and safe optimizations.

Data & persistence

SQL thinking, schema design, indexing basics, and reliable data access layers.

APIs & architecture

Design HTTP APIs, validation, error strategy, versioning, and maintainable layering.

Security essentials

Auth basics, secrets hygiene, OWASP mindset, and secure-by-default choices.

Shipping mindset

Testing, observability, CI basics, and release-ready practices you can reuse.

Learning system

A workflow that keeps you shipping

Every week follows the same loop: watch, practice, build, review. This repeatable cadence turns new concepts into muscle memory without overwhelming your schedule.

Your weekly loop

Mo
Mon

Fundamentals + note

We
Wed

Lab implementation

Fr
Fri

Review + speed drills

We
Weekend

Ship a small feature

Get the full roadmap

Watch then build

Short, focused video lessons followed by immediate practice.

Guided lab

Step-by-step tasks that reinforce every concept with code.

Speed drills

Timed micro-challenges that sharpen recall and pattern recognition.

Weekly cadence

A sustainable rhythm so you keep learning without burning out.

Proof of skill

Checkpoints and project milestones that prove your progress.

Hands-on code labs

Practice that feels like production

Short videosCheckpointsRepeatableFocused
HTTP

API Lab

Design endpoints, validate inputs, produce reliable errors, and add health checks.

Checkpoint

Implement → verify → refactor → ship

Tooling

Debug Lab

Learn to chase bugs with intent: logs, breakpoints, invariants, and minimal repro.

Checkpoint

Implement → verify → refactor → ship

Git

Branch Lab

Git workflows that prevent chaos: clean commits, small PRs, safe rebases.

Checkpoint

Implement → verify → refactor → ship

CLI

CLI Lab

Write a tiny Java CLI that feels pro: arguments, output formats, exit codes.

Checkpoint

Implement → verify → refactor → ship

Project suite

Build a portfolio that proves skill

Project suite overview

What you get from projects

  • Real-world complexity, guided approach
  • Each project ships a working module
  • Covers REST, queues, SQL, metrics, security, deploy
  • Portfolio-ready from day one
REST• lab

Inventory API

A clean REST API with validation, pagination, error strategy, and tests.

DeliverableRepo-ready module
Progress72%
QUEUES• lab

Async Job Runner

Queues, retries, idempotency, and observability-friendly execution.

DeliverableRepo-ready module
Progress72%
METRICS• lab

Metrics Dashboard

Expose metrics and build a small dashboard view for service health.

DeliverableRepo-ready module
Progress72%
SQL• lab

Data Layer Upgrade

Refactor queries, add indices, and measure performance improvements.

DeliverableRepo-ready module
Progress72%
SECURITY• lab

Security Hardening

Threat model, safer defaults, input constraints, and secrets hygiene.

DeliverableRepo-ready module
Progress72%
DEPLOY• lab

Deploy Playbook

Build, configure, and ship a service with a simple release checklist.

DeliverableRepo-ready module
Progress72%

Learn the developer workflow, not just syntax

Syntax is just the start. Real productivity comes from knowing how to structure projects, manage configuration, write meaningful logs, and ship with confidence. These practices are baked into every module.

Production habits

  • Small commits
  • Explicit error strategy
  • Config from environment
  • Structured logging
  • CI-friendly test suites
  • Documented API contracts
Developer workflow

Templates

Starter templates for common project types so you never begin from scratch.

Config & env

Environment setup patterns that keep secrets safe and configs portable.

Logging mindset

Structured logs, correlation IDs, and the discipline of observable code.

Data contracts

Define your API boundaries clearly — request/response shapes, error envelopes, versioning.

Testimonials

What they say

Developers who followed the path and ship in production.

“Finally clean, structured Java. The labs and project suite took my backend skills to the next level.”

Marie L.

Backend developer, Paris

“The level ramps up without the fluff. I regained confidence for technical interviews.”

Thomas K.

Java tech lead, Lyon

“Clear explanations and downloadable checklists — I still use them every day.”

Aïcha D.

Fullstack developer, Brussels

Pick your path

Starter

49 €one-time
  • Core curriculum
  • Lab tasks
  • Curriculum updates
  • Downloadable checklists

30-day satisfaction promise

Best value

Pro

129 €one-time
  • Everything in Starter
  • Full project suite
  • Advanced drills
  • Release checklist pack
  • Performance & debugging modules

30-day satisfaction promise

Master

199 €one-time
  • Everything in Pro
  • Extra architecture deep-dives
  • Production hardening playbook
  • Design review prompts
  • Priority updates

30-day satisfaction promise

Need a custom learning plan?

Reach out and we'll help you pick the right path.

Contact

Quick answers

Got questions before you start? Here are the most common ones. If you don't find your answer, reach out to us directly.

FAQ illustration

Pro tip

Start with the Starter plan to explore the curriculum, then upgrade anytime if you want the full project suite and advanced modules.