Hire The Top 1% Freelance Java Spring Developers

Flexiple is a network of top Java developers, engineers, and architects with hourly rates ranging from $30 to $100. Join 100+ teams who have hired Java developers from Flexiple for a few weeks to a few years!


Java Spring Developer


Morgan Stanley


Senior Spring Developer




Java Spring Developer




Java Spring Developer


Goldman Sachs


Senior Java Spring Developer



Flexiple spent good amount of time understanding our requirements, resulting in accurate recommendations and quick ramp up by quality developers.

Narayan Vyas, Senior PM (YC S12)

Overall Flexiple brought in high-level of transparency with quick turnarounds in the hiring process at a significantly lower cost than any alternate options.

Esther Hersh, Co-founder ('17 NYU Grad)

Flexiple has been instrumental in helping us grow at a fast pace. Their vetting process for engineers is top notch and they connected us with quality talent quickly.

Tanu V, Founder (#1 Salesforce Leads App)

Work With Flexiple's Expert Java Spring Developers!

Be a short-term or a long-term project, don't compromise on the quality of talent you work with. Flexiple handpicks only the Top 1% through a 6-stage screening process.
    Java Spring React

    Sreenidhi is a senior full stack developer with 16 years of experience in the software industry. He has developed multiple applications that are used in ... a variety of industries like fintech, stock exchange, transport, etc. He is adept in technologies like Java, Angular, React, MySQL, etc. He has the capability of managing teams and developing products while working remotely. He has also worked as an Architect and Project Manager. Read more

    Previously at Hitachi

    Hire Sreenidhi
    Java Spring Scala

    Lafif is a Java Spring developer with 3 years of experience in the software development industry. He is a Computer Science Master's degree holder and ... specializes in Java and Spring among other technologies. Included in the many feathers in his cap are his employment with companies across industries including the likes of Ericsson. He has worked as an individual contributor on his projects. Read more

    Previously at Ericsson

    Hire Lafif
    Java Spring Boot AWS

    Sridhar is a backend expert with an extensive career of 15 years in the software development industry. He has executed multiple roles like an architect, ... team lead and has also worked with both service and product-based companies. He has developed applications for a wide variety of industries like finance, human resources, etc. He is adept in technologies like Java, Spring Boot, PostgreSQL, etc. Read more

    Previously at Visa

    Hire Sridhar
    Java Spring Go

    Anand is an adept backend developer with 5 years of experience in the software domain. He is a CS graduate from National Institute of Technology, ... Raipur (premier institute in India). Having started his career at Hewlett Packard Enterprise, he also worked with multiple prominent companies like Swiggy , Amazon, etc. He has worked on complex projects and cutting edge applications using technologies like Java, Go, NodeJS, MySQL, Redis, etc. Read more

    Previously at Amazon

    Hire Anand
    Java Angular NodeJS

    A Senior Full Stack Developer/ Architect with over 27 years of experience working with technologies like Java, JavaScript (frameworks such as ReactJS, D3.js), Data Modeling, ... and Data Integration. Over the years, he has worked with several multinational teams and performed multiple roles such as Software Engineer, Project Architect, Project Director, etc. He is now exploring startups to work as a remote freelance engineer. Read more

    Previously at Mindtree

    Hire Nagarajan
    Java Python React

    Rahul, a brilliant senior developer, has substantial experience of over 7 years in the software domain. He has worked across multiple product companies like Flywheel ... and an esteemed service company, Goldman Sachs. He was the software engineering vice-president of the technology division in Goldman Sachs. Proficient in Java, Python, React and more, he has developed across domains like fashion, communication & collaboration. Read more

    Previously at Goldman Sachs

    Hire Rahul
    Java Spring AWS

    Kai is an adept backend developer with 6 years of experience in the software domain. He is a CS graduate from Cardiff University, UK. He ... has worked on retail ,client management and banking based projects. He has developed cutting edge workflows using technologies like Java, Spring, AWS, Docker, Kafa etc. He has experience working in a startup and remotely with cross regional teams. Read more

    Previously at Goldman Sachs

    Hire Kai
    Java Spring Hibernate

    Amruta is a senior backend developer with 16 years of experience in the IT industry. She is an expert in the backend technologies like Java, ... Spring, Hibernate and other technologies like Angular, MySQL, Eclipse, etc. She has developed cutting edge applications that are used in various industries like supply chain, food, health care, etc. She is a remote work experienced professional with experience in leading teams and with excellent communication skills. Read more

    Previously at Capgemini

    Hire Amruta

Flexiple Helps You Hire Quality Developers, Handpicked for You

  • Work only with the best

    Our developers are selected through a 6-stage screening process. As a result, our developers have an average of 5-years industry experience and are ready to immediately contribute on projects.
  • Work with Role-specific Developers

    Save time and energy lost in manually sifting through profiles. Our solutions expert along with our Director of Technology will handpick developers who are a perfect match for your requirement.
  • Work Risk-free & Start within 2 Days

    With immense confidence in the quality of our developers and the accuracy of our recommendations, we are happy to offer you a 1-week trial where you pay only if you are satisfied.

Find the perfect developer for your team at the right price

  • Individual Contributor

    • 1-3 years of experience
    • Mostly worked on a single stack
    • Top Individual Contributor
  • Multi-faceted Contributor

    • 3-7 years of experience
    • Expertise in multiple stacks
    • Worked on niche skills
    • Mentors Junior Developers
  • Leader & Diverse Contributor

    • 7-10+ years of experience
    • Worked across stacks, products
    • Multiple niche skills
    • Led multiple teams in the past

How We Select the Top 1%

45.4%pass rate

Depth in past work

Flexiple Developers are reviewed on their experience and complexity of products built. Those who display depth and have worked on end-to-end projects are given an introductory call.

14.6%pass rate

Good communication and motivation

Over a call, the developer’s ability to communicate in an articulate manner is tested. A deeper understanding of the candidate’s technical experience and also motivation to freelance is achieved.

3.1%pass rate

Strong technical abilities

Over one or more F2F interviews, the developer’s involvement and performance in building complex software products are assessed. This sets the platform to delve deeper into technology-specific discussions.

1.5%pass rate

Keen problem solving and coding

Developers' mental agility and problem-solving abilities are tested through a coding test involving algorithmic as well as skill-specific problems. A mixture of live evaluation and timed coding tests is used.

1.2%pass rate

Splendid reviews in background check

The live experience of working with developers is verified by reaching out to past clients and/or employers. Inputs on various qualitative factors such as reliability, punctuality, communication and responsiveness are received.

1%pass rate

Consistent exemplary performance

Performance during each engagement is continually assessed. Our developers are expected to maintain Flexiple standards across all engagements with our customers.

Hire Freelance Java Spring Developers within 48 Hours!

Our simple process gets you working with the right freelancer quickly and seamlessly

Don't Just Take Our Word For It!

(Y-Combinator S12 and Andreessen Horowitz-backed Company)

Quality product launched on schedule by a team of 8 engineers

"Flexiple helped us hire quality developers across technologies - Node, Rails, PHP, Python. They spent a good amount of time understanding our requirements, resulting in accurate recommendations and quick ramp up by developers. We also found them to be much more affordable than other alternatives for the same level of quality."

Narayan Vyas,

Senior Product manager, Plivo Inc

(Incubated at the European Space Agency)

Helped set up and scale tech team on demand

"Flexiple has exceeded our expectations with their focus on customer satisfaction! The freelancers are brilliant at what they do and have made an immense impact. Highly recommended :)"

Henning Grimm,

Founder, Aquaplot

(Acquired by Unicorn, Hike Messenger)

Saved 30% costs with 2 software products delivered

“Overall Flexiple brought in high-level of transparency with extremely quick turnarounds in the hiring process at a significantly lower cost than any alternate options we had considered.”

Kislay Shashwat,

VP Finance, CREO

('17 NYU Graduates)

Found a perfect new member for its globally distributed team

"Working with Flexiple has provided us with partners who are providing us with the required technical support for our growth and success!"

Esther Hersh,

Co-founder, Peblio Inc

(Y-Combinator S18)

Hired the first remote engineer to work directly with the CTO

"It has been great working with Flexiple for hiring highly talented and hardworking folks on contract. We were looking for a suitable developer on the back-end and we got to know Ankur through Flexiple. We are very happy with the commitment and skills he brings to the job and we will be working with Flexiple going forward as well after this positive experience. I recommend them highly for any freelancing talent you are looking to hire!"

Neil Shah,

Chief of Staff, Prodigal Tech

(#1 Lead Routing App for Salesforce)

Helped scale the product with a team of engineers

"Flexiple has been instrumental in helping us grow at a fast pace. Their vetting process for engineers is top notch and they were able to connect us with quality talent quickly. The team put great emphasis in understanding our requirements and getting to know us which ensured that we were matched with folks who were a great fit not only technically but also culturally."

Tanu V,

Founder, Power Router

(Acquired by Reliance for $100 million)

Delivered 2 high quality products forming a long partnership

"The engagement with Flexiple and their community members has helped us get work done in a timely manner and helped us go above and beyond."

Swapan R,

Co-founder, Haptik

(Acquired by PayU for $70 million)

Built their first remote tech team of a frontend and backend engineer

"Highly responsive team with prompt support and willingness to go the extra mile. Powered by technically brilliant personnel on board, we have happy results – all this at an affordable price!"

Sajith N,

Product Manager, Wibmo Inc
  • How to Hire a Great Freelance Java Spring Developer?

  • The Spring Framework is an open-source application framework for developing Java applications. Java Enterprise Edition (Java EE) is one of the most popular frameworks, Spring helps developers create high performing applications using reusable and efficient code.

    If you’re looking for a freelance Java Spring developer, this guide will come handy. We’ve included everything you need to know about the hiring process.

    But before we get into the fundamentals of hiring a freelance Java Spring developer, let’s delve into some interesting facts about Java.

    We have broken the sections into the following parts:
    1. Let's introduce Spring Framework to you.
    2. Why is Spring Framework widespread?
    3. What are the tools used by Spring developers?
    4. Writing the Job Description to hire a Java Spring developer
    5. Interview Questions for hiring a Java Spring developer
    - Basic Questions
    - Advanced Questions
    - Data Structures/Algo Questions

    1. Let's introduce Spring Framework to you

    • Spring framework was first written by Rod Johnson in 2002. The framework was first released in June 2003 under the Apache license version 2.0.

    • Spring Framework is a Java platform that provides comprehensive infrastructure support for developing Java applications.

    • Spring handles the infrastructure so developers can work on creating applications.

    • Spring framework is very developer friendly. It’s easily testable and lightweight, modular and configurable.

    • Spring simplifies the complex enterprise Java application development process by offering a framework that includes technologies like Aspect-oriented programming (AOP), Dependency injection (DI) and Plain Old Java Object (POJO).

    • 2. Why is Spring Framework widespread?

      • Spring’s libraries are trusted by developers globally. Spring caters to millions of users in the form of various services like streaming TV and online shopping. Spring is also used in giant tech firms like Amazon, Google, Microsoft, and more.
      • Spring Framework provides a wide range of features and functionality. Spring has the tools to help if you’re building secure cloud-based products and data streaming flows for any enterprise.

      3. What are the tools used by Spring developers?

      The following are some of the tools used by Spring developers at various stages of development:

      1. IDE
      An integrated development environment (IDE) is a software application that builds applications and combines common developer tools into a single GUI.

      • Spring Tool Suite - is an open-source Java IDE made for developing Spring-based enterprise applications. It is easier and faster, based on Eclipse IDE.
      • IntelliJ IDEA - provides built-in developer tools for the Spring Framework with extensive coding assistance including a dedicated project wizard and code highlighting.
      • MyEclipse Spring IDE - the Spring version of MyEclipse is specifically designed for developers using Spring Framework. It allows developers scaffolding and project bootstrapping for advanced projects.

      2. Plugins
      Plugins are computer software that adds new functions to a host program without altering the host program itself.

      • Spring Maven - is a plugin that allows developers to package executable jar or war archives and run Spring applications prior to running integration tests.

      4. Writing the Job Description to hire a Java Spring developer

      Below are some key points that we at Flexiple have learned through trial and error - a process of filtering through over 15,000 developers.

      • Years of software development experience: Be specific about the technology you’re looking for and the number of years of experience needed. A proxy to years of experience can be the number of production-level apps worked on.

      • Expertise in a specific framework: All frameworks have their peculiarities and nuances. While good Java developers can pick up other frameworks, it’s a plus point to hire a developer who already has expertise in it.

      • Type of products built in the past: Based on the type of product you are trying to build - social network, SAAS product, etc. - you can prioritize certain developers over others.

      • Exposure to specific industries: Developers who have built products in certain industries will already know key aspects of laying the foundation for a great product and will be able to predict possible problems.

      • Experience working remotely: Hiring someone who has worked remotely in the past is an added advantage as they would have first-hand experience of everything right from how contracts work to communication and from timelines to deliverables.

      • Strong communication: An essential thing to look at when hiring a freelancer is excellent communication skills. Since all the interaction happens online, freelancer should be able to effectively communicate to ensure a streamlined execution of all work.

      • 5. Interview Questions for hiring a Java Spring developer

        Now that you have made a quality JD, it can still be tricky to evaluate the skills of your applicants. To help you with that, we have created a pool of questions that a good Java Spring developer should be comfortable with. You can check out some related interview questions on this page.

        It is important to note that the ability to answer these questions doesn't imply that you have a top quality candidate. But it definitely is a big step in that direction.

        To help you navigate through these questions, we’ve categorized the interview questions in 3 parts:

        A. Basic concepts: Includes all basic concepts used across languages but we've focused on its significance in Java Spring Development. This section will give you an understanding of how strong their programming foundation is.

        B. Advanced concepts: Includes all concepts that someone with higher expertise should know.

        C. DS/Algorithm questions: To test the logical capability of the candidate.

        A. Basic concepts

  • What are Functional Interfaces in Java and how are they created?

    An interface that contains only one abstract method is called a functional interface. Subsequently, functional interfaces can have only one functionality, however, they could contain multiple default methods.

    With Java 8, lambda expressions can be used to instantiate functional interfaces making it much easier.

    Examples of functional interfaces include - ActionListener, Comparable

    Here is the code used to define a functional interface.

    interface Foo {
        void test();
  • What are some best practices to avoid deadlocks in Java?

    • Nesting Locks: A major cause of deadlocks is when locks are given to multiple threads. Avoiding giving locks to multiple threads in case a thread with a lock already exists can help prevent deadlocks.
    • Using the Thread.join(): Deadlocks can also appear when a thread waits for a resource from another thread. However, in such cases the Thread.join() can be used with the maximum execution time.
    • Using Lock only when necessary: Practice using locks only on members when it is required. Having unnecessary locks is a major cause of deadlocks.

    B. Advanced concepts

  • Rotate an array based on K’s position, Eg k = 2?

        public static int[] rotateBruteForce(int[] nums, int k) {
     for (int i = 0; i < k; i++) { 
     for (int j = nums.length - 1; j > 0; j--) {
     // move each number by 1 place
     int temp = nums[j];
     nums[j] = nums[j - 1];
     nums[j - 1] = temp;
     System.out.println("Array rotation after "+(i+1)+" step");
     return nums;
  • What is Memoization?

    Memoization is an approach that helps solve problems caused by dynamic programming. This process ensures that a given method does not execute more than once for the same inputs.

    The return values are stored in Hashtables or Hashmaps and reused whenever required.

    The code below is an example of memoization in a Fibonacci series.

     import java.io.*;
    class GFG
    // Fibonacci Series
    // using Recursion
    static int fib(int n)
        // Base case
        if (n <= 1)
            return n;
        // recursive calls
        return fib(n - 1) +
            fib(n - 2);
    // Driver Code
    public static void main (String[] args)
        int n = 6;

    C. Data Structure/ Algorithm

  • 1. Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order. Note that an empty string is also considered valid.

    class ValidParenthesesFunc {
        func isValid(_ s: String) -> Bool {
            var stc = [Character]()
            for char in s {
                if char == "(" || char == "[" || char == "{" {
                } else if char == ")" {
                    guard stc.count != 0 && stc.removeLast() == "(" else {
                        return false
                } else if char == "]" {
                    guard stc.count != 0 && stc.removeLast() == "[" else {
                        return false
                } else if char == "}" {
                    guard stc.count != 0 && stc.removeLast() == "{" else {
                        return false
            return stc.isEmpty
    The above code will input 0(false). 
  • 2.  Write a program to find whether a string or number is palindrome or not.

    import java.util.Scanner;
    public class Palindrome {
        public static void main (String[] args) {
            String original, reverse = "";
     Scanner in = new Scanner(System.in);
           int length;
            System.out.println("Enter a number or a string");
            original = in.nextLine();
            length = original.length();
            for (int i =length -1; i>;=0; i--) {
                reverse = reverse + original.charAt(i);
            System.out.println("The reverse is: " +reverse);
                System.out.println("The string is a palindrome");
                System.out.println("The stringis not a palindrome");
    For String- Enter a number or a string
    The reverse is: mas
    The string is not a palindrome
    For Number-Enter a number or a string
    The reverse is: 99
    The number is a palindrome 
  • 3. What will the output of the following code be?

    class Test {
    public static void main(String args[])
            String str1 = new String("Hello World");
            String str2 = new String("Hello World");
            String str3 = "Hello World";
            String str4 = "Hello World";
            int a = 0, b = 0, c = 0;
            if (str3 == str4)
                a = 1;
                a = 2;
            if (str1.equals(str3))
                b = 1;
                b = 2;
            if (str1 == str4)
                c = 1;
                c = 2;
            System.out.println("a= " + a + " b= " + b + " c= " + c);

    A. a=2 b=1 c=2
    B. a=2 b=2 c=2
    C. a=1 b=2 c=1
    D. a=1 b=1 c=2

    D. a=1 b=1 c=2 because a new memory is created when we make an object with the help of the ‘new’ keyword, 
    and the reference variable contains the memory location. 
    Here the memory is created with the same string twice, but since we are comparing objects and not strings, 
    the object will point to a different memory location and so they are not equal. 

    Parting thoughts on hiring Java Spring developers

    That is everything you need to know about hiring a freelance Java Spring developer. As discussed, it isn't easy to find a quality freelance Java Spring developer but this guide makes the process easier for you. To offload the entire hiring process, reach out to us at Flexiple. We've designed a high-quality, 6-step screening process to find the top 1%, freelance developers. You can find the best freelance Java Spring developers here. We've already served over a hundred clients, earning great reviews for the quality of service.

    Lastly, to quickly summarize it for you:
    1. Note your project requirements and hire accordingly. Do not go for the lowest or the highest-paid developer.
    2. Don’t hire without vetting- consider asking questions right from the basics to advanced to logical questions.
    3. Look for companies like Flexiple that help you find the perfect fit.

    Happy hiring! :)

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