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Become a Java / Spring Boot Developer
Build production-grade REST APIs and microservices with Java 21 and Spring Boot 3.
CREATED BY
A
Asha M. [PLACEHOLDER] ★ 5.0
Tools & Automation Engineer at BigFruit Inc. | 9+ years of experience
About this Path
Designed for developers with basic Java knowledge who want to build and deploy enterprise-grade backend services. You will progress from Spring Boot fundamentals through REST API design, database integration, security, and containerised deployment. By the end you will have shipped a fully tested microservice to a cloud environment.
Path Overview
Intermediate LevelCertificate of CompletionAbout 60 hours to completeEnglish language20+ curated videosLearn online at your own pace5 modules with resourcesGamified & interactive
Path Curriculum
Project setup with Spring Initializr
Bootstrap a project with Maven, select starters, understand auto-configuration.
Dependency injection and bean lifecycle
Constructor injection, scopes, and @Configuration classes explained with real examples.
Building your first REST controller
Map HTTP verbs, path variables, request bodies, and response entities correctly.
Application properties and profiles
Externalise config with application.yml, active profiles, and @Value bindings.
Entity modelling and relationships
Define @OneToMany and @ManyToMany mappings avoiding the N+1 query trap.
Repository patterns and custom queries
Derived methods, @Query JPQL, and native SQL with Spring Data repositories.
Database migrations with Flyway
Version-control schema changes and run repeatable migrations in CI pipelines.
Transactions and optimistic locking
Propagation levels, @Transactional boundaries, and handling concurrent updates safely.
Spring Security 6 filter chain
Understand SecurityFilterChain, CSRF, CORS, and custom authentication entry points.
JWT-based stateless authentication
Issue, validate, and refresh JSON Web Tokens in a Spring Boot service.
Role-based and method-level authorization
Use @PreAuthorize, @Secured, and authority hierarchies to protect endpoints.
REST API versioning and error handling
Design @ControllerAdvice global handlers and consistent RFC 7807 problem responses.
Unit testing with JUnit 5 and Mockito
Mock dependencies, assert behaviour, and achieve meaningful coverage without over-mocking.
Integration testing with Testcontainers
Spin up real PostgreSQL and Redis containers for slice tests that catch regressions.
Contract testing with Spring Cloud Contract
Generate stubs from provider contracts to test consumer integrations in isolation.
Dockerising Spring Boot with Buildpacks
Build minimal OCI images using Cloud Native Buildpacks and layered JARs.
Kubernetes deployment with Helm
Write Deployment, Service, and ConfigMap manifests; manage releases with Helm charts.
Observability with Micrometer and Grafana
Expose metrics, set up Prometheus scraping, and build a latency dashboard.
CI/CD pipeline with GitHub Actions
Automate test, build, and deploy stages with matrix builds and Docker layer caching.
What you'll learn
- ✓Design and implement RESTful APIs using Spring Boot 3 and Java 21 virtual threads.
- ✓Integrate relational databases with Spring Data JPA and write efficient JPQL queries.
- ✓Secure APIs with Spring Security 6, JWT authentication, and role-based access control.
- ✓Write unit and integration tests with JUnit 5, Mockito, and Testcontainers.
- ✓Containerise Spring Boot applications with Docker and deploy them to Kubernetes.
- ✓Implement observability using Micrometer, Prometheus, and Grafana dashboards.