Spring Developers Hiring Guide

A powerful framework focused on business requirements

Spring is a powerful, popular, and lightweight application framework for Java. As such, it’s a great tool for Java-based enterprise application development. Spring handles the basic structure of the application development while you can focus on dealing with your core requirements. 

Spring is very lightweight. This is because it implements POJOs (Plain Old Java Objects) that don’t require objects to inherit classes. Development using such objects is called minimal invasive development, and it doesn’t require many code changes.

Spring offers many advanced features such as component scanning and dependency injection for Java Enterprise Edition (JEE). In addition, it offers excellent support to other frameworks such as Hibernate and Struts. 

  • Hiring Guide

  • Interview Questions

  • Job Description

The Spring container is the center of the framework. It’s used for creating and managing string bean objects, which are the backbone of Spring applications. It uses dependency injection and Inversion of Control (IOC) for managing these components.

IOC is a programming principle that enables Spring to attain loose coupling. Spring allows you to inject objects in class rather than waiting for the class to create an object. This transfers the control of objects to the container. 

Spring uses an aspect-oriented programming model for modularization. It separates cross-cutting tasks such as performance monitoring, error handling, transaction management, etc., away from the application's business logic.  


Spring In Today’s Market

Spring is one of the most powerful frameworks for Java. Thousands of websites worldwide use Spring to manage the complexity of Java. Developers all around the world trust this framework, and its popularity is rising.

That’s because this fast, secure, and flexible framework has provided comprehensive infrastructure for developing enterprise Java applications. In addition, Spring’s Model-View-Controller (MCV) architecture allows the development of flexible web applications through web servlets. As a result, Spring has become a default solution for developing large-scale enterprise applications.  


Issues Companies Face While Hiring Spring Developers

Hiring reliable and capable Spring developers doesn’t come without its share of challenges. First, there is a shortage of experienced Spring developers. A good Spring developer should have great problem-solving skills and should be able to create, deploy, and manage code modules efficiently. But many developers lack the expertise and experience required to handle full-scale projects. 

Even if they can handle Spring, sometimes the engineers aren’t able to handle complex Java operations such as concurrency and lambda expressions. Or they may not have experience in servlets, servlet containers, or Java Database Connectivity. 

Another issue is the lack of upskilling. Being a Spring developer means that you have to constantly keep upskilling yourself with emerging technologies and software to update your company’s tech stack. It’s a hard process, and only a few developers can rise up to the challenge.  


How To Choose the Best Spring Developers

Hiring a good Spring developer is a complex task. A perfect Spring developer should know more than just the technical aspects related to the framework. They also have to understand complex business requirements and how to convert them into efficient and scalable solutions.  

A good Spring Developer requires expertise in Java and Java EE application development. They should know about application design and OOPS. They should also know about advanced Spring principles such as ICO and dependency injection (DI).

A Spring developer might have to work on QA and bug reporting. For that, they should have extensive experience in error handling and resolution. They should also be well versed with REST APIs along with JSP, JSTL, and Spring boot. 


Conclusion

Spring has proven itself as one of the most popular and preferred frameworks for Java development. Its unique features have enabled developers to work on business logic without worrying about boilerplate code. As a result, Spring developers are highly useful for creating enterprise-level applications quickly and smoothly. 

What are the 2 methods you can use to get beans from an IOC container? 

BeanFactory and ApplicationContext are the 2 methods to get beans from the IOC container. BeanFactory is a basic container that manages beans. It is advisable to use BeanFactory when memory consumption is critical, such as when building mobile apps. That’s because it’s more lightweight than ApplicationContext. 

On the other hand, ApplicationContext is a more advanced container that includes all the functionality of the BeanFactory. It’s a central interface in the Spring container and is highly recommended for enterprise applications.


In which scenario would you use singleton and prototype scope?

Singleton scope is used with stateless beans, while prototype scope is used with stateful beans. Singleton only creates one instance for a single bean per container. Thus, the same object is returned each time it’s injected. However, the prototype scope creates a new instance for a single bean for every new request made. Here, a new object is produced each time it’s injected.


How can you fetch records from Spring JdbcTemplate?

Records can be easily fetched from the database using the query method of JdbcTemplate. It can be done via 2 interfaces - ResultSetExtractor and Rowmapper. ResultSetExtractor accepts a ResultSet and returns the list. Engineers use the RowMapper interface to map ResultSet on a per-row basis. Thus, it doesn't need to write a lot of code to fetch the records, and RowMapper objects are generally reusable.


What is bean wiring, and how does auto wiring occur?

Bean wiring is the act of combining beans and their properties with a Spring container for dependency injection. Auto wiring is done by placing a bean instance into the desired field of another bean. 


List some of the new features in Spring 5.0

Spring has gained many new features with the upgrade to Spring 5, such as:

  • Core Framework Revision: The community has improved Spring Core to take advantage of Java 8 features.
  • Functional Programming with Kotlin: The upgrade has introduced support for Kotlin. Kotlin is a modern, object-oriented programming language that is interoperable with Java. Kotlin support has enabled developers to dive into functional Spring programming and Android development.
  • Core Container Update: With 5.0, Spring can now support candidate component indexes as a substitute for classpath scanning. This significantly impacts large projects as loading the index is easier than scanning and reduces costs. 

We are looking for smart Spring developers to join our team. They should be passionate team players who specialize in Spring development, Java development, and module maintenance. It’s an excellent opportunity for result-oriented developers who want to tackle challenging projects while improving their skills.


Responsibilities

  • Apply business log to create functional and scalable applications.
  • Design, build and maintain Java applications.
  • Ensure security, performance, and quality.
  • Maintain J2EE applications. Coordinate with product managers, DBAs, and stakeholders to understand business requirements.
  • Identify bugs, bottlenecks, and errors and fix them.
  • Follow best industry practices and standards.
  • {{Add other relevant responsibilities}}

Skills and Qualifications

  • Working Knowledge of Java and J2EE.
  • Experience in frameworks such as Spring, Struts, and Hibernate
  • Proven experience with OOPS principles and MVC design.
  • Knowledge of JDBC and Java GUI
  • Knowledge of REST API and architecture design.
  • Problem-solving skills and team spirit.
  • {{Add other frameworks or libraries related to your development stack}}
  • {{List education level or certification required}}

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