IntermediateOn-site or remoteOPCO-eligible

Formation Modern Java and Spring Boot – Production Level

Design, test and deploy Spring Boot 3 and Java 21 applications to industry standards

This intensive 3-day training covers the complete stack a back-end Java developer faces today: Java 21, Spring Boot 3, JPA and Hibernate persistence, security with Spring Security, integration testing, hexagonal architecture, resilience, Kafka messaging, observability and Docker packaging. You work on OrderHub, a realistic red-thread application with 4 connected business features, multi-level testing and a complete Docker deployment.

3 days (21h)

6-12 participants

13 modules

French

Eligible for OPCO funding and skills development plans

1 750

EUR excl. tax / participant

OPCO-eligible

On-site or live virtual class (Microsoft Teams by default)
Groups of 4 to 8 trainees maximum
OrderHub red-thread project: complete Spring Boot application with tests, documentation and runbook
Materials: 300 slides, 13 exercise booklets, 7 synthesis sheets
Private Slack/Discord channel kept active for 4 weeks after the training
Detailed training certificate delivered upon completion
Reference: JAVA-SPRING-PROD-3J — eligible for OPCO funding and corporate skill development plans

Eligible for OPCO funding and skills development plans

Course objectives

Use modern Java language features introduced since version 17 (records, sealed classes, pattern matching with switch, virtual threads)

Design a REST API with Spring Boot 3 integrating Bean Validation and centralized error handling using ProblemDetail (RFC 7807)

Choose the appropriate test type (unit, slice test, full integration) and configure a Spring Boot application via profiles and environment variables

Map a data model with JPA and Hibernate avoiding classic pitfalls and fix N+1 issues with JOIN FETCH or @EntityGraph

Secure a REST API with Spring Security 6 and JWT Bearer authentication, including security tests

Set up a robust integration test chain using Testcontainers (PostgreSQL) and WireMock

Organize an application following hexagonal architecture principles and apply SOLID daily

Implement HTTP call resilience (circuit breaker, retry) with Resilience4j and design idempotent endpoints

Publish and consume events on Apache Kafka with Dead Letter Topics handling

Expose Prometheus metrics via Micrometer and package the application with a multi-stage Dockerfile ready for Kubernetes

Detailed program (13 modules)

Records and value objects, sealed classes, pattern matching with switch, var and type inference, stream programming, virtual threads for concurrency.

Target audience

Java developers in role for 1 to 5 years
Tech leads and software architects
Developers transitioning to Java (1 to 2 years in another language)
DevOps or SRE engineers working on Spring Boot applications

Prerequisites

Practical knowledge of Java: classes, inheritance, interfaces, collections, exceptions, lambdas
First experience with a Java framework (Spring, Jakarta EE or equivalent), at least one small complete application built
Knowledge of HTTP protocols and JSON format
Basic notions of relational databases and SQL (SELECT, INSERT, UPDATE, JOIN)
JDK 21 LTS, Maven 3.9+, Docker Engine 24+, IntelliJ IDEA recommended

Your instructor

Lead AI Engineer

Our AI lead has recognized expertise in artificial intelligence with several years of experience in data and AI. He designs and deploys innovative agentic solutions for leading global corporations.

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