Complete hiring guide for Spring Boot developers

Take no risks for selecting the suitable and best Spring Boot talent. We provide you with a complete and extensive guide for hiring Spring Boot developers where you can find all the needed information and crucial answers regarding this process.

Marija Neshkoska

Marija Neshkoska

Complete hiring guide for Spring Boot developers

About Spring Boot

The Java-based Spring Boot is an open-source web framework used for microservice creating and standalone applications. Spring Boot shortens the length of a code and makes the Spring application run easily, while the Spring framework achieves flexibility and infrastructure support through dependency injection.

Spring Boot will automatically configure the Spring application, provides standalone quality without app deployment with web servers, and also is opinionated in terms of determining what packages and defaults need to be installed for dependencies.

Spring Boot developer stats

Presently, there is a high demand for Spring Boot in the enterprise world due to the excellent, high scalability and availability.

Up until now, more than 37.000 commits have been uploaded to GitHub successfully. To clarify, a commit is a snapshot of a repository (central location of data) that displays all the latest source code changes directly to the repository.

Interviewing a Spring Boot developer

Helpful tips for a pre-screening interview

Before a Spring Boot developer is hired, the experts conducting the interview must always prepare several brief questions for finding out if the candidate meets all criteria needed within a company. Essential questions are asked first, and then the next phase is the group of technical and practical questions.

Our talent acquisition specialist Maria Kyryliuk emphasized,

“Developers talking passionately about their job, great soft skills, being respectful during the interview and ensuring camera visibility and functioning, as well as attention to the conversation, good English language proficiency are all great signs. And of course, if I feel there is a good conversation flow and mutual understanding, this is the final impression that rounds up the interview ”.

Top technical skills to look for in a Spring Boot developer

A good Spring Boot developer ought to know several sets of technical skills for the execution and completion of assigned tasks.

Regarding architecture and software design, the perfect match should know a few architectural patterns, as such:

  • Peer-to-peer pattern
  • Broker pattern
  • Master-slave pattern
  • Model-view-controller pattern
  • Layered pattern
  • Event-bus pattern
  • Client-server pattern
  • Blackboard pattern
  • Pipe-filter pattern
  • Interpreter pattern

Next, is the OOP, or Object-Oriented Programming, and its basic concepts are encapsulation, abstraction, inheritance, polymorphism, user-defined types, predefined types, and operations too.

There is another crucial skill that is a must-have, and that is knowledge of microservices and their usage. The Java developers have to update their skills and knowledge and follow the trend of microservice building, instead of monolithic applications. For this, a good knowledge of Docker Container is a needed prerequisite.

Docker is proven to be useful in not just creating, but compiling microservice applications as well, and in various environments too. In turn, the developers need to know the DURS principles well, and they serve as a Microservice basis. There are a few basic principles of DURS: failure isolation, domain-driven design, decentralization, continuous delivery, and DevOps too.

The experienced Spring Boot developer needs to know the proper usage of microservice architecture areas too. Those key crucial areas are authorization, authentication, network security, data security, and deployment too.

As far as microservice patterns go, the listed ones below are favored and practiced by seasoned developers.

  • Delivery pipelines
  • GraphQL APIs
  • Secure by Design
  • Docker Rootless Mode
  • HTTPS needs to be used for securing
  • Handling Sensitive information
  • Dependencies need to be scanned
  • Avoiding Security attacks
  • RSocket Endpoints
  • Time-based Security
  • Cloud and Cluster specific Security best practices
  • Access and Identity Tokens
  • Scan Docker and Kubernetes Configuration

The developer also needs to know about microservice best practices, listed below:

  • Microservices targeted to user needs
  • Microservices API Design Practices
  • DevSecOps approach
  • Defense in depth pattern
  • Managing Sessions
  • Automatic security updates
  • Centralized software for security and monitoring
  • Aggregating application logs
  • Distributed tracing

DevOps Tools

Another major plus for the developer is knowledge and skills about DevOps. Knowledge about one or more tools of the ones listed below is a good asset:

  • Docker
  • Ansible
  • Jenkins
  • Raygun
  • Phantom
  • Nagios
  • Puppet
  • Gradle

Unit and Mockito

Developers need to create and develop suitable unit tests for the specific code. For Java code unit testing, JUnit is always used. JUnit also has a parent framework, Xunit. Within a project, unit testing coverage is ensured through unit test suites execution and implementation. The Unit Testing is done manually, but also with automated methods as well.

There is a principle called “first testing, then coding”, and JUnit is based on exactly that. Simply put, JUnit assists in creating better efficiency and quality of the developer’s work. The features of this open-source software framework are:

  • Annotations
  • Assertions
  • Test Runners
  • Automatic Test suite execution
  • Test Suites
  • Test progress
  • Fixtures

A typical unit test contains a test case for checking the program functionality or a method within the class. With the input and result in mind, the test case is created to check both the input and results. The input precondition checks are complete.

Also, the postcondition result checks are complete. For each test case, you can appoint one single positive and negative test accordingly. Such tests could be integrated with tools like Ant, Maven, and Eclipse, and can be integrated with IDEs too.

What sets apart a great Spring Boot developer from a good one?

The perfect match is a great Spring Boot developer who has a good understanding and great knowledge of Java web standards such as filter and servlet. Another plus is if the developer knows messaging queues (ActiveMQ/RabbitMq/Kafka), docker, microservice patterns, and how a cache server works (Redis). The developer also should be capable to write a clean code and applying TDD practices well.

How Proxify helps you find the best Spring Boot talent

If you take on the hiring and talent matching process yourself, the whole process of matching a talent could become difficult without help. This process can consume a lot of time for successful completion from start to finish since it includes more than just publishing an ad or scheduling interviews with candidates and applicants.

The process will include spending a lot of time, as well as resources for onboarding and even training candidates where it is fit, and more processes along the way. And also, just imagine all the costs and consequences if you choose the wrong candidate during the hiring process and selection.

The Proxify talent acquisition specialists and experts can offer you their specialty through a meticulous and time-saving process of choosing the right talent match for you, because we highlight top-tier developers that can start work almost immediately, in a matter of days upon being selected.

Our process of matching the right talent consists of:

  1. Self-assessment tasks that are assigned to the candidates who are shortlisted

  2. A pre-screen call that recruiters schedule with candidates that completed an initial task successfully. In this phase, we focus on testing technical, and non-technical skills, proficiency in the English language, and also past and current experience of the candidate.

  3. The next step in the process is a precise, technical task through an assessment test

  4. Lastly, we finalize the process with a technical interview that is organized and led by a Spring Boot developer with extensive experience.

We give our best efforts and attention, and we ensure that the time needed for hiring a perfect match is shortened, unlike most agencies or recruitment service providers who could stretch out the process for quite some time. This is mainly because the Spring Boot framework skyrockets in popularity for years in a row - most prominently with Proxify, where the demand and need for this have increased significantly in the whole last decade.

Essentials and assessment of a Spring Boot developer

We figured the best people to answer the question of how to find the essential factors that make a Spring Boot developer a good hire, are our own technical interviewers and developers. For this reason, we interviewed Koray Gecici, Besfort Shehu and Ramazan Sakin, and asked them to give us their personal tips on the essentials when assessing the seniority, experience and technical knowledge of Spring Boot developers.

According to Software Engineer and Spring Boot developer Ramazan Sakin, a fit candidate should know of:

“The VCS concept, as well as Git usage, additionally also having experience with CI/CD and tools such as Bamboo, Jenkins, GitLab among others.”

Further, Software Engineer and Spring Boot developer Besfort Shehu also adds that the right fit should know:

  • Starter POMs
  • Autoconfiguration
  • Spring Boot CLI
  • Spring Boot Initializer

“For assessing expertise, the focus is on asking what the developer knows about dependency injection, bean instantiation by an IOC container and IOC in general, the meaning of a controller, service, repository and entity packages, autoconfiguration, code coverage, and branch coverage, as well as differentiating between integration tests and unit tests ”, Computer Engineer and Spring Boot developer Koray Gecici followed up.

Benefits of Spring Boot

Using Spring Boot brings numerous benefits, and confirms the all-encompassing practicality that makes the work process simple and functional for engineers and developers, and from many aspects as well.

One benefit of Spring Boot is the usage and reliance on Java, otherwise, perhaps the most popular programming language, but also, provides a testing setup that is default and intended for Java-based applications.

Another significant benefit is autoconfiguration, and experts unanimously agree on this. It means the Spring application is easily configured in a simple way, and according to the JAR dependencies the developer chose.

What benefits did Spring Boot developers mention?

We asked our developers at Proxify about their experience with Spring Boot and what they found to be the most useful and practical features and benefits in this regard. Relying on their expertise, we collated valuable information below.

Sakin emphasized:

  • No need for XML configuration
  • Reduced amount of boiler-plate code
  • Embedding of Tomcat, Jetty, and Undertow
  • Less time is needed for development, through a RAD platform (Rapid Application Development)

Furthermore, Gecici adds:

  • Simple, practical, and easy start and setup
  • Simplified management of dependencies

And also, Shehu further elaborated with:

  • No need for WAR files deployment
  • Rich and broad user community and also access to free learning sources and materials
  • Creating standalone applications

Additionally, other Spring Boot benefits to mention are:

  • Remote access managing/impeccable admin support
  • Included plugins for working with databases
  • HTTP servers embedding

Three steps to your perfect Spring Boot developer

  • Step 1

    Tell us about your needs

    Talk to a technical manager about your requirements and goals for your product or project.

  • Step 2

    Get matched to the perfect developer

    Within days, a hand-selected and fully-vetted developer will be presented to you.

  • Step 3

    Begin working together (risk-free)

    Work begins. Completely risk-free for a week. You only pay if happy.

Find a Spring Boot professional

Why use Spring Boot?

Spring Boot enables developers to write lines of code instantly, without special preparation or specific configuration of the development environment. With this provided, all users will easily implement the XML configurations, batch processes control, robust identification, and execution of database transactions, among other crucial tools for development.

  • What is Spring Boot?

    Spring Boot is an open-source Java-based framework used for creating microservices. It is is majorly used by Java developers for making standalone applications of production-grade type, which overall shortens the time for production and simplifies the deployment.

  • Spring Boot vs Java

    Java is popular due to the support received from experts and industry professionals, along with commercial organizations, but Spring Boot is excellent because it enables developers to make Spring-based services that are production-ready, and this saves time otherwise spent on preparing the environment.

  • What is Spring Boot Actuator?

    As part of the Spring Boot framework, the Actuator library displays operational information for any ready-to-deploy application, and the majority of developers use this to get knowledge about the database metrics and state, and this includes traffic too.

  • Is Spring Boot a backend?

    Yes, Spring Boot is a backend framework. The community is highly active, with regular support and contributions for perfecting the Spring Boot and making it a great fit for Java-based applications within the Java EE platform, respectively.

Trusted by:


Have a question about hiring a Spring Boot developer?

  • How much does it cost to hire a Spring Boot developer at Proxify?

  • How does the risk-free trial period with a Spring Boot developer work?

  • Can Proxify really present a suitable Spring Boot developer within 1 week?

  • How does the vetting process work?

Find your next developer within days, not months

We can help you deliver your product faster with an experienced remote developer. All from €31.90/hour. Only pay if you’re happy with your first week.

In a short 15-minute call, we will:

  • Understand your development challenges
  • Explain our process to match you with qualified, vetted developers from our network
  • Share next steps to finding the right match, often within less than a week

Not sure where to start?

Let’s have a chat

First developer starts within days. No aggressive sales pitch.