Development of a PWA for a POS system for a chain of plumbing stores

Description

Our customer was a Danish chain of plumbing stores. The company contacted us with a request to develop a PWA for their POS system in accordance with their needs.

Client`s pain and concern

Right now, we partially use Excel for performing and tracking various sales activities, which complicates the entire workflow.

We would like to offer our employees the possibility to handle sales-related tasks, including customer service, merchandising, inventory management, etc. through the application.

Project Team size

.NET Developer
Angular Developer
Business Analyst
Project Manager
QA
Performance Test Engineer

Solutions

After gathering the requirements, our team started developing a VVSE application to handle various tasks related to sales, customer service, merchandising, inventory management, and others.
We built an application with the following structure and functionality:

Virtual machine (hosting)

C#, TypeScript (JS), .Net Core 3.1, .Net Standard 2.1, PWA, Angular 11
MongoDB 5
Backend: AutoMapper, Coravel, JwtBearer, MongoDB.Driver Frontend: Bootstrap 5, html2canvas, rxjs
Windows app, ready to be cross-platformed
The monolithic main application with Microservices
Architecture of the application, development of the product, testing, deployment and support.
Notification service
Сircular service
Logger service

Business Central

POS system specification

PWA application
Database – IndexedDb
Hardware Handler application (for work with a scanner, a printer, and a payment terminal)

The design of the application is simple and user-friendly. Buttons are big enough to click on both with the mouse and on the touchscreen. The most used buttons are placed on the right. VVSE has the same style: the same fonts, buttons, and color scheme. The responsive design of the application ensures its comfortable use on screens with different resolutions. VVSE supports a classic desktop style of interaction, mainly on 15,6" (format 4:3) and 17" (format 5:4) resolutions.

We also conducted a stress test at the client’s request. It was aimed at achieving the following objectives:

to get information on the simultaneous number of users and their distribution;
to detect errors;
to determine a response time with different system loads;
to define the bottlenecks of the system average and maximum simultaneous requests per second.

Technologies

Used in the project

C#
.NET
Angular

Outcome

As a result of our work, the customer got a PWA that can help employees perform various tasks related to sales, customer service, merchandising, inventory management, etc.

We continue our cooperation, gradually enhancing the solution and adding new functionality.