DEV-201 Development

Enterprise Java with Spring Boot

Build a production-shaped Spring Boot service end to end: dependency injection, REST endpoints with validation, persistence through Spring Data and JPA, transactional boundaries, externalised configuration and operational endpoints. Learners implement, test and run a service with layered test slices rather than a single brittle integration suite. Every topic is taught against failure modes seen in real deployments.

B3Practitioner

6modules

42skill atoms

2role journeys

Curriculum

What this course covers.

6 modules, 42 named skill atoms. Expand any module to see them.

1Spring Core, DI and Configuration7 skill atoms

ApplicationContext and bean lifecycleconstructor injection over field injectioncomponent scanning, qualifiers and primary beansauto-configuration and conditional beansproxying limits on self-invocationapplication.yml precedence and ConfigurationProperties bindingprofiles for environment-specific wiring

2REST APIs and Validation7 skill atoms

RestController and request mappingDTOs separate from entitiesBean Validation with jakarta.validationControllerAdvice and consistent error payloadscontent negotiation and status codespagination and filtering conventionsOpenAPI generation with springdoc

3Persistence with Spring Data and JPA7 skill atoms

entity mapping and identity strategyrepository query derivationJPQL and native querieslazy loading and LazyInitializationExceptionN plus one and join fetchFlyway migrations under version controlprojections to avoid loading whole aggregates

4Transactions and Consistency7 skill atoms

Transactional propagation and isolationrollback rules for checked exceptionsread-only transactions and flush behaviourtransaction boundaries at the service layeroptimistic locking with Versiondeadlocks and lock orderingoutbox pattern for reliable side effects

5Testing Slices and Operations7 skill atoms

WebMvcTest, DataJpaTest and full SpringBootTestTestcontainers for a real databaseMockMvc request and response assertionstest data lifecycle and rollback between testsActuator health, info and metricsliveness and readiness probesstructured logging with correlation ids

6Working With an AI Pair on Spring7 skill atoms

the assistant scaffolds controllers, DTOs and mappers quicklyit invents outdated annotations and XML-era patternshallucinated Spring Data query method names that fail at startupconfiguration that compiles but wires the wrong beangenerated tests that assert the implementation not the behaviourverifying by running the slice, never by reading the suggestiontransaction and security boundaries stay the engineer's call

Where it fits

DEV-201 in the role journeys.

This course appears in 2 of our 45 role journeys. Here is what a learner takes immediately before and after it in each.

Java Developer

Practitioner stage

DEV-103→DEV-201→DEV-401

Backend Engineer

Practitioner stage

DEV-102→DEV-201→DEV-302

Roles this course serves

Backend Engineer Java Developer

The capability ladder

This course is authored to band B3.

Every course we run is written to one rung of the CASI ladder, so a plan can be assembled to take a team from where they are to where they need to be.

What do B1–B6 mean?The CASI Capability Ladder — click to expand

Every course targets a band on the CASI Capability Ladder — our six-band proficiency scale, anchored to open standards (O*NET, ESCO, NICE, NIST AI RMF, Bloom's). A band tells you how deep a course goes, and what evidence proves it.

What the learner can doTypical evidence

AwareUnderstands concepts and vocabulary; uses tools with guidance

Knowledge checks

FoundationPerforms standard tasks correctly in familiar contexts

Guided labs, autograded exercises

PractitionerDelivers complete pieces of work independently

Scenario labs, proctored hands-on exams

ProfessionalHandles production-grade complexity, trade-offs and failure modes

Break-fix drills, design defenses

AdvancedEngineers systems end-to-end under constraints; leads others

Rubric-scored capstones, vivas

ExpertSets direction; recognised authority across teams

Portfolio + panel evaluation

A note on B6. Courses in this catalog target B1–B5. B6 is not taught — it is recognised, through a portfolio and a panel, once someone is setting direction for others. Every journey here is built to land a learner at B5.

Other Development courses at this level.

DEV-102

Run DEV-201 for your team.

This course runs at several lengths depending on how deep you need to go and how much of it your people already have. Tell us who is being trained and we will scope it.

Add it to a training plan Talk to our team Check your team’s level free

Enterprise Java with Spring Boot

What this course covers.

DEV-201 in the role journeys.

Java Developer

Backend Engineer

Roles this course serves

This course is authored to band B3.

Other Development courses at this level.

Object-Oriented Design & Clean Code

Data Structures & Algorithms for Working Engineers

MERN Stack Development

MEAN Stack Development

Android Development with Kotlin

iOS Development with Swift

Run DEV-201 for your team.