Secured REST service
Deliverable: A Spring Boot API with JWT authentication, role-based authorisation, request validation and a consistent error response contract, documented with OpenAPI.
Course
Advanced Java
What comes after core Java — Spring Boot, JPA, REST APIs, testing and deployment, taught by building a service you deploy and can defend in an interview.
- Duration: 4 months
- Classroom · Online live
- Level: advanced
What you will be able to do
- Build REST APIs with Spring Boot including validation and error handling
- Use dependency injection and understand what the container is doing
- Map objects to tables with JPA and Hibernate without generating terrible SQL
- Secure an API with Spring Security and JWT
- Write unit and integration tests that actually run in a build
- Package, containerise and deploy a service
Who this course is for
- Anyone comfortable with core Java — classes, collections and exceptions
- Graduates who studied Java and want employable depth
- Working developers moving into backend or enterprise roles
- Core Java is a genuine prerequisite, not a formality
Syllabus
6 modules · 4 months
Module 1. Core Java, sharpened
- Collections, generics and equals and hashCode done properly
- Streams, lambdas and functional style
- Exceptions, resources and try-with-resources
- Concurrency basics and the executor framework
Module 2. Spring fundamentals
- Inversion of control and what the container actually does
- Beans, scopes and configuration
- Spring Boot auto-configuration and starters
- Profiles, properties and externalised configuration
Module 3. Building REST APIs
- Controllers, request mapping and response entities
- Validation and a consistent error contract
- DTOs, mapping and not exposing your entities
- Versioning and documenting with OpenAPI
Module 4. Persistence with JPA
- Entities, relationships and cascade behaviour
- Repositories, derived queries and JPQL
- The N+1 problem, fetch strategies and how to see the SQL
- Transactions, isolation and where things go wrong
Module 5. Security
- Spring Security filter chain
- Authentication, JWT and stateless sessions
- Method level authorisation
- Password storage, secrets and configuration hygiene
Module 6. Testing and delivery
- Unit tests with JUnit and Mockito
- Integration tests with a real database container
- Building with Maven and a repeatable pipeline
- Dockerising a service and deploying it
Tools and technologies you will use
- Java 17 or later
- Spring Boot
- Spring Data JPA and Hibernate
- MySQL or PostgreSQL
- Maven, JUnit and Mockito
- Docker and Git
Projects you will build
Persistence layer with a fixed N+1
Deliverable: A JPA layer where the N+1 query problem is demonstrated with SQL logging on, then fixed, with the query count before and after recorded.
Tested and containerised service
Deliverable: The same service with unit and integration tests running in the Maven build, packaged as a Docker image and started with one command.
Where this course can take you
- Java Backend Developer
- Spring Boot Developer
- Software Engineer
- API Developer
- Enterprise Application Developer
Duration, modes and fees
- Duration
- 4 months
- Delivery modes
- Classroom · Online live
- Fees
- Share your details for the current fee
- Fees vary by batch and delivery mode. Ask about the combined fee if you take this directly after the core Java course.
Placement assistance
Every student gets placement assistance — that is what 100% placement assistance means. It is support for all, not a job for all. We do not promise a specific salary, a specific number of interviews, or placement at any named company, and you should be wary of anyone who does.
What is included
- A place in the monthly placement drive, held every third Saturday
- The readiness programme every second Saturday — mock interviews and preparation
- CV review against the specific roles you are targeting
- Portfolio review, so your project work is presented the way a reviewer will read it
- Access to the vacancy pool employers send directly to the Samyak network
- Guidance on which roles realistically fit your background and which do not
- A place in the next drive, with coaching, if you are not selected in this one
What is not included
- Any guarantee of a job, an interview, or a particular salary
- Placement at a named or partner company
- Applying to jobs on your behalf
- Support before you have completed the course and its project work
- Visa, relocation or overseas placement assistance
The gap between knowing Java and being hired for it
Plenty of graduates can write Java. Far fewer can build a secured REST service, map it to a database without generating catastrophic SQL, test it and ship it.
That second list is what backend job advertisements actually contain, and it is the entire content of this course. The language is assumed; the ecosystem is taught.
Spring is not magic, and treating it as magic is the trap
Auto-configuration makes a working service appear in twenty minutes, which is wonderful and slightly dangerous.
The second module deliberately slows down to explain what the container is doing — beans, scopes, injection, the order things are created in — because everybody who skips it eventually meets an error message that only makes sense if you know what Spring was trying to do. Understanding the machinery once is cheaper than guessing at it for a year.
Turn the SQL logging on
The persistence module has one non-negotiable exercise: switch on SQL logging and watch a single page request fire two hundred queries.
The N+1 problem is invisible in development, disastrous in production, and one of the most reliable things an interviewer asks about. Having seen it happen, fixed it, and recorded the query count before and after is worth more than being able to define it.
Where core Java stops being optional
This is the one prerequisite we do not waive.
Spring hides a lot, and someone still uncertain about interfaces, generics and exception handling will experience the framework as something that works until it does not. You would pass the course and then struggle in the job, which helps nobody. If core Java is not yet comfortable, take that course first — it is the shorter route to the same destination.
Questions
Advanced Java — frequently asked questions
What is the difference between the Java course and this one?
The Java course teaches the language — syntax, objects, collections, exceptions. This teaches what employers build with it — Spring Boot, JPA, REST APIs, security, testing and deployment. Almost every backend Java advertisement lists the second set. Take the first if you are new to the language; take this once it is comfortable.
Do I really need core Java first?
Yes, and this is the one prerequisite we hold to. Spring hides a great deal of machinery, and someone who is still uncertain about interfaces, generics and exceptions will experience the framework as magic that sometimes fails. You will pass the course and struggle in the job. Take the Java course first — it is the shorter path to the same place.
Is Java still worth it against Python and JavaScript?
For backend work in Indian enterprise, banking and large product companies, Java hiring is deep and stable and the salaries are strong. It is less used for scripting and data work, where Python wins. This is not a language contest — it is about which kind of employer you are aiming at.
Why does the course spend a whole project on the N+1 problem?
Because it is the single most common performance failure in JPA applications, it is invisible until production, and being able to describe it is a reliable interview differentiator. Turning SQL logging on and watching one page fire two hundred queries is a lesson nobody forgets.
Enquire about Advanced Java
Three details is all we need. A course advisor will call you back.
Related courses
- Java Programming
Core Java properly, then Spring Boot — with real weight given to object-oriented design and the collections framework, because that is what enterprise Java interviews actually test.
- Full Stack Java
The stack large Indian enterprises and services firms actually run — Java and Spring Boot on the server, React on the client, with a relational database designed properly underneath.
- SQL and Databases
SQL taught against a database big enough that a bad query is noticeably slow, because toy datasets hide performance entirely and performance is half of what the job tests.
- DevOps
The toolchain taught around the goal it serves — shipping small changes safely and often — rather than as a list of products to name on a CV.
Next step
Talk to a course advisor
Tell us what you want to learn and we will help you pick the right course, batch and mode.