Create an Open Banking App Using OpenAPIs and Spring Boot

basic Java • basic Spring and Spring Boot • basic build tools such as Maven or Gradle • basics of REST
skills learned
creating Java software with Spring and Spring Boot • consuming and integrating external data with an application using RestTemplate • integrating with OpenAPI • securing your endpoints with Spring Security • containerizing Spring applications with Docker
Nathan Crocker
5 weeks · 5-7 hours per week · BEGINNER
filed under
This title has been retired and is no longer for sale.
Look inside
Boutique FinTech company has a bold new idea. It wants to build an app that will give personal financial customers a better idea of how they’re spending their money, with an in-depth summary of every transaction. The company has hired you to build it for them.

You’ve decided to use Spring Boot and OpenAPI to build this banking app. Your challenges in this liveProject will include integrating with an external service, matching transactions to’s special database of merchant codes, and building an attractive UI that enhances bland financial readouts with company names and logos.

Once you’ve built the bones of your app, you’ll use Open API to integrate with an Open Banking Standard-compliant REST-based API. You’ll secure your new API with Spring Security, containerize it with Docker, and present your new app to your boss ready for your clients!
This project is designed for learning purposes and is not a complete, production-ready application or solution.

book resources

When you start your liveProject, you get full access to the following books for 90 days.

project author

Nathan Crocker
Nathan B Crocker is a Senior Java Developer at Galaxy Digital LP., one of the premier financial services and investment management companies in the digital asset and cryptocurrency sector. He is focused on building and augmenting front and middle office systems to grow trading operations and scale the business. For over a decade, he has built dozens of financial services applications, using Spring Boot to build traditional services, microservices, and event-driven systems for several FinTech companies, as well as large investment banks.


The liveProject is for intermediate Java programmers who know the basics of Spring Boot and REST services. This project will use the last stable version of Java 14. To begin this liveProject, you will need to be familiar with:

  • Basic Java
  • Basic Spring and Spring Boot
  • Basic build tools such as Maven or Gradle
  • Basics of REST

you will learn

In this liveProject, you’ll master the technology stack used for professional Java development. You’ll learn the ins and outs of integration, one of the most common tasks in software development.

  • Creating Java software with Spring and Spring Boot
  • Consuming external data and integrating it with your application using RestTemplate
  • Integrating with OpenAPI
  • Securing your endpoints with Spring Security
  • Containerizing Spring applications with Docker
  • Readying your application for production


You choose the schedule and decide how much time to invest as you build your project.
Project roadmap
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book resources
Get full access to select books for 90 days. Permanent access to excerpts from Manning products are also included, as well as references to other resources.