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Reference: Operator of diagnostic platforms, provider of Radiology as a Service

Micro-service architecture for new application built on AngularJS

Introduction

Our client is an innovative company headquartered in Berlin that specializes in radiology technologies for the inpatient and outpatient sectors.

Our client is rapidly growing and already operates in major cities in Germany. In the future, the company plans to build new offices in different countries in Europe as well as worldwide. Part of their offering is a web application for administrative and medical staff operations management, as well as for handling customer interactions.

Challenge

Business acceleration forced the client to realize the need for existing application enhancements. It had some serious shortcomings, was not stable, and could not meet growing needs and new technical requirements. Thus it wasn’t scalable and since it had been developed by a third party, the functionality could not be easily extended.

The company faced a few serious challenges, among which were:
A growing number of performance issues that could not be fixed
Inability to extend the system’s functionality
Not having access to every single part of the application
In such a situation they were looking for a dedicated software development partner to support their project further and develop a completely new web solution.

Project goals

The following goals and objectives were defined for the project.

100% scalable application
available 24/7 anywhere in the world
with a fresh and intuitive UI
built on easily customizable business rules based on BPM technology

Why K&C

K&C was invited for the initial architectural discussion as we had deep technology expertise (Java, Spring Boot, Axon framework, Kafka, Consul) and offered a very competitive pricing plan. K&C was a good fit because of great experience in working with vert.x and BPM technologies, both of which could satisfy the client’s requirements.

K&C was chosen to take the project further and provide both consulting and development services.

Solution

New Application features

As a result of deep analyses of client business needs and technical requirements, the decision was taken to build a new application with the following features:
Micro-service architecture
REST API that can be consumed by any client
Configurable business rules
Simple client for REST API

Front-end solution

K&C is working on completely refreshing the UI, making it more intuitive and accessible, as well as building new important features, such as appointment assignment, order management, etc.

In order to reach high-performance standards for the project, complex front-end architecture was developed. It combines simplicity of AngularJS development enhanced with AMD functionality and helped to achieve extremely high rendering speeds and great implementation time with minimal use of resources.

This new application fully supports all BE global architecture goals, follows the same bounded context separation, and other requirements. This allows proper parallel development of specific features.

Achievements of the solution:

Great performance achieved through full incorporation of AMD pattern
Proper coding standards, usage of ES2015 language level
Great delivery performance and quality

FE solution technology stack:

Angular JS
SystemJS
JSPM
Jasmine

Back-end solution

The new application will be developed as a suite of small and independent services, where each service provides a set of specific features and runs isolated from others using its own JVM. It will support a range of different platforms and devices, and at the same time will not have a long-term interest in any particular technology stack.

The concept of micro services architecture for new web application was accepted for a number of reasons:

  • Greater scalability, which allows organizing the development process around multiple independent teams

  • Independent deployment of each of the services, which simplifies the deployment of new versions

  • The IDE is faster, making developers more productive

  • Isolated parts enable better security

  • No need to be committed to a single technology for a long time

Infrastructure solution

To match the high scalability inherent in the chosen architecture of the application, K&C is developing an equally scalable architecture for the infrastructure centered around the concept of containers.

The main goals to be achieved using technologies such as Docker and Kubernetes are:
DevOps approach to application deployment
optimal usage of underlying computing resources
automated replication of infrastructure services

Outcomes

Microservices architecture was chosen as the best one meeting customer requirements, offering an application with a good integration environment and deployment infrastructure, which is easy to run and understand.

As a result of the project, our client will have its own application that will be supported and extended by their in-house developers. The company plans to implement this solution across all offices and all countries where it is present.

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