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Java, Spring Boot and microservices

Build, test and run production REST services and microservices with modern Java and Spring Boot.

No reviews yetTaught by Walnut Jobs course team
Level
Intermediate
Language
English
Duration
34 hours
Lessons
12

Last updated 22 Oct 2026

What you'll learn.

  • Use modern Java features such as records, streams, Optional, sealed types and virtual threads.
  • Build REST APIs with Spring Boot that validate input and return consistent RFC 9457 error responses.
  • Persist data with Spring Data JPA, manage transactions and version schemas with Flyway.
  • Test services with JUnit 5, MockMvc and Testcontainers against real dependencies.
  • Decompose a system into services along bounded contexts and choose synchronous or event-driven communication.
  • Make services resilient and observable with Resilience4j, Micrometer and OpenTelemetry.

How this course is taught.

Every module comes to you in four parts, so you can watch, read, discuss and check what you have learned.

  1. Quadrant I

    e-Tutorial

    Watch a short video lecture for each module, with full text notes beside it so you can review or translate at your own pace.

  2. Quadrant II

    e-Content

    Download or print the reading material for each module, with key terms, case studies and links to further resources.

  3. Quadrant III

    Discussion forum

    Ask questions and clear your doubts with other learners. The course team guides the discussion and answers questions.

  4. Quadrant IV

    Assessment

    Check your understanding with quizzes, short and long-answer practice and FAQs, then take the final test.

Curriculum.

4 modules · 12 lessons
1Modern Java3 lessons · 44 mine-Content (notes)2Assessment1
  • Note: Records, streams and Optional18 min
  • Note: Sealed types, pattern matching and virtual threads16 min
  • Quiz: Module 1 quiz10 min
2Building REST APIs with Spring Boot3 lessons · 44 mine-Content (notes)2Assessment1
  • Note: Spring Boot essentials16 min
  • Note: Controllers, validation and error handling18 min
  • Quiz: Module 2 quiz10 min
3Data and testing3 lessons · 44 mine-Content (notes)2Assessment1
  • Note: Spring Data JPA, transactions and Flyway18 min
  • Note: Testing with JUnit 5 and Testcontainers16 min
  • Quiz: Module 3 quiz10 min
4Microservices in practice3 lessons · 56 mine-Content (notes)2Final test1
  • Note: Decomposition and communication18 min
  • Note: Resilience and observability18 min
  • Final test: Final assessment20 min

Your certificate.

This is the certificate you receive when you complete the course and pass its final test.

Certificate No.

WDT-WJJSM-2026-000000

Certificate of completion

Java, Spring Boot and Microservices

This is to certify that

Learner Name

has successfully completed the course and passed its assessment, and is recognised as a

Java, Spring Boot and microservices

4 modules12 lessons34 hours of learningOnline, on Walnut LMS

DD Month YYYY

Date of issue

Noida, India

Authorised Signatory

Walnut DataTech Private Limited

Verify this certificate at walnutdatatech.com/verify-certificate with certificate number WDT-WJJSM-2026-000000. Issued on Walnut LMS.

Specimen — not a valid certificate
Java, Spring Boot and microservicesView full size

What you need to receive it.

Complete every lesson and pass the final assessment with at least 70%.

Every certificate carries its own number that anyone can check on the verification page.

About this course.

Java and Spring Boot run the core systems of banks, insurers, retailers and airlines across the world, and the teams that maintain them hire continuously. Employers want engineers who write clean modern Java, build well-designed REST APIs, test against real databases and understand what changes when one application becomes many services.

This course takes you from Java 21 language features through Spring Boot 3 web, data and testing, to microservice design, messaging, resilience and observability. Every module uses the conventions you will find in enterprise codebases, so you can contribute from the first week.

Who this is for

  • Developers with basic Java who want to work on enterprise back-end teams.
  • Engineers from other languages moving to the JVM.
  • Candidates applying for Java back-end or microservices roles at banks, consultancies and product companies.

Skills this certificate proves: Java (Advanced), Spring Boot (Advanced), Microservices (Proficient), REST APIs (Proficient).

Linked to Walnut Jobs: complete this course to earn the certificate employers ask for.

Your instructor.

Walnut Jobs course teamJob-ready courses designed with hiring companies

Learner reviews.

No reviews yet

No reviews yet. Learners can review a course after completing half of it.

Questions about enrolling.

Is this course really free?

Yes. Create an account and enrol with one click. There's no payment step.

How long can I access this course?

You keep access for as long as the course is offered on Walnut LMS.

Do I get a certificate?

Yes. The certificate section above shows the certificate and sets out what you need to receive it.

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