KINTAVORJava Backend Professional

Build enterprise backends with Java and Spring Boot.

Learn through real projects, REST APIs, databases, security and tests.

An online, self-paced pathway from programming fundamentals to a professional API with PostgreSQL, Spring Security, testing and documentation.

Explore the programme Create my first API for free

Indicative 16-week plan · 12 months' access · Java runs on your computer

Developer working with Java code and a database schema on two monitors
From code to data design: learn to reason about every backend layer.
100–130 hof estimated study and practice
36 moduleswith progression from fundamentals to architecture
180 exerciseswith hints and full explanations
6 projectswith starter code and a private solution

Learning backend means learning to make decisions.

Copying a controller is not enough. You will practise modelling a domain, separating responsibilities, validating inputs, persisting data, protecting endpoints and demonstrating behaviour through tests.

The aim is for you to explain why a solution works, recognise its limits and improve it through reasoned decisions. Reaching a professional standard requires consistent practice; completing the course does not replace work experience.

Object-oriented designSQL and persistenceREST APIsSecurityTestingOperations and cloud

36 modules, organised so you can progress without unexplained gaps.

Each block connects theory, examples, practice, assessment and a deliverable you can review. Technical versions are centralised to make future updates easier.

  1. Java and object-oriented programming

    1. Backend fundamentals
    2. Professional Java environment
    3. Syntax and types
    4. Control flow
    5. Classes and objects
    6. Inheritance and composition

  2. Quality, tools and testing

    1. Collections and generics
    2. Lambdas, Streams and Optional
    3. Exceptions, dates and files
    4. SOLID and clean code
    5. Git and code review
    6. JUnit and Mockito

  3. Data, HTTP and Spring

    1. Relational SQL
    2. PostgreSQL and modelling
    3. JDBC, JPA and Hibernate
    4. HTTP, JSON and REST
    5. Spring Framework and injection
    6. Spring Boot structure

  4. Architecture and security

    1. Controllers, Services and DTOs
    2. Validation and errors
    3. Queries, pagination and sorting
    4. Transactions
    5. Spring Security
    6. Roles, permissions and JWT

  5. Delivery and operations

    1. OpenAPI
    2. Unit and integration testing
    3. Logging, metrics and Actuator
    4. Local Docker
    5. Continuous integration
    6. Cloud fundamentals

  6. Professional judgement and final project

    1. Microservices with sound judgement
    2. Performance and caching
    3. OWASP and API security
    4. AI applied to programming
    5. Portfolio and interviews
    6. Final enterprise project

Unsure where to start? The level test suggests an entry point without blocking any content.

Take the level test

Practice with a record of your work.

It is not about ticking boxes. You can save notes, favourites, test results and errors you want to revisit.

180
coding, SQL, debugging, design, security and testing exercises
300
original questions with reasoned answers and no cosmetic variants
13
assessments: twelve section assessments and one final assessment
1
error notebook with progressive hints and review scheduling

Six projects with business context, not six empty repositories.

Each project includes user stories, requirements, a data model, phases, tests, a rubric, a request collection, OpenAPI, initial data and a presentation guide.

  1. 01

    Inventory management

    Layered Java application to manage products, movements and stock alerts.

  2. 02

    Library and loans

    REST API with a catalogue, users, loans, validation and tests.

  3. 03

    Students and courses

    Academic backend with relationships, queries, pagination and enrolment rules.

  4. 04

    E-commerce

    Catalogue, basket, orders, statuses, transactional consistency and security.

  5. 05

    Operations and logistics

    API for shipments, routes, incidents and traceability in a business scenario.

  6. 06

    Final professional project

    Users, roles, PostgreSQL, JWT, testing, OpenAPI, environments and CI.

See how the portfolio is built

Your code stays in your environment.

Download the starter project, work with the JDK and Maven, run the tests and record the result in the campus.

There are instructions for Windows, macOS and Linux, alternatives without Docker and Maven Wrapper where appropriate. You do not need GitHub, a cloud account or an external tool to complete the core course.

  1. 1
    DownloadStarter separate from the solution
  2. 2
    ImplementIn your IDE and on your computer
  3. 3
    CheckMaven tests and manual review
  4. 4
    ReflectResult, notes and error notebook
Security boundary: Hostinger hosts the PHP/MySQL platform. KINTAVOR never executes student-pasted Java, SQL or configuration on the server.
Programmer reviewing a REST API and a request collection on her laptop

Start for free with an API that works.

“Build your first REST API with Java and Spring Boot” takes you through environment setup, HTTP, a GET endpoint, a POST endpoint, simple validation and testing the API.

  • Five exercises
  • Diagnostic test
  • Downloadable project
  • Working final result
Open the free mini course

An AI tutor that teaches before solving.

It knows the current lesson, exercise or project and offers progressive hints before showing a full explanation.

It can review Java, SQL, Maven and configuration snippets; interpret compilation errors and stack traces; highlight common risks; and suggest tests.

It does not run code or validate results on its own. Its responses may contain errors. The course teaches you to check them against tests, official documentation and human review.

One payment. Twelve months to learn in depth.

Access to the full course, future corrections to this version, projects, assessments and the private KINTAVOR certificate.

£111.47launch price£162.96 standard price
  • Individual access for 12 months
  • One account and one primary device or browser
  • One-off payment through Stripe Checkout
  • No live classes or recurring fees
Purchase access

Payment is confirmed in Stripe. KINTAVOR does not store banking details.

Frequently asked questions

What matters before you decide.

Can I start without previous experience?

Yes. The pathway starts with logic, syntax and object-oriented programming. It is an extensive course: you will need to practise consistently and complete the exercises on your own computer.

Does the course have live classes?

No. It is a fully online, self-paced course, with no live classes. It includes written lessons, practical exercises, assessments, downloadable projects and progress tracking tools.

Where do Java and Spring Boot run?

On your computer, using a JDK and Maven in IntelliJ IDEA, VS Code or another compatible IDE. Docker is optional. The web platform does not execute student-submitted code on Hostinger.

Do I need Docker or a GitHub account?

No. Instructions without Docker are available, and projects are downloaded directly from the campus. GitHub can help you publish a portfolio, but it is not required for studying.

What does the AI tutor do?

It explains, offers hints, reviews pasted snippets and helps interpret errors. It does not run your code or replace automated tests, official documentation or your own review.

How long does access last?

Twelve months from payment confirmation. The duration, prices and limits may be changed by the administration before a new purchase.

Is the certificate official?

No. KINTAVOR issues its own private completion certificate. It is not an official qualification and does not certify work experience.

Is finding a job guaranteed?

No. The course helps develop skills and portfolio projects but does not guarantee employment, salary, success at interviews or hiring.

Private training with clear expectations.

KINTAVOR provides private training. Its certificate is proprietary and unofficial. There is no affiliation with Oracle, OpenJDK, VMware, Broadcom, Spring or other brands mentioned; their names are used for descriptive purposes only. Some optional cloud services may incur costs. Students run projects in their own environments at their own responsibility, and keys or secrets must never be uploaded to repositories.

Last visible update: 12 August 2026.