For many years, I have developed both bespoke and "off the shelf" applications for a wide range of industries. I have experienced the entire lifecycle from gathering requirements, specifications, coding, testing, deployment and review. Clients have ranged from small businesses to leading corporate entities such as Barclays Bank and E.ON. My strengths include the capacity to take ownership of my work, to communicate effectively both with project sponsors and team members, to demonstrate initiative when appropriate and to ensure that I always add value to any project with which I am involved. I enjoy the interaction with both end users and team members to ensure the final solution is fit for purpose, delivered on time and to budget.
UK and Irish passport holder
Development of a tablet-based app on iOS and Android using Xamarin Forms.
Extensive bi-directional WebView and Javascript integration. Background data synchronization.
Custom controls, custom renderers, SkiaSharp and SVG images, camera, database migrations.
Web API, Autofac, SQLite, Serilog, Git.
European tour by car taking in France, Germany, Austria, Slovenia, Croatia and Italy.
Additional work on several projects. Additional features for the Skyward application. Generation of PDF reports on an Android Xamarin application. Creation of a prototype (sample) HR application using ASP.Net MVC & SQL Server.
Production of Mobile App using Xamarin Forms for Android and UWP.
Approximately 80 screens, camera, custom Forms controls.
Syncfusion charts, Autofac, SQLite, Serilog, SkiaSharp.
Sharepoint REST API.
Product specification and design of Data Pigeon product.
Development of 2 core ASP.Net MVC applications.
Development of 2 mobile apps (iOS & Android).
Azure infrastructure configuration & administration.
Development of eXtraLettings, an ASP.Net Letting Agency System. Support & on-going development of SMART and ePlanner.
Development & support of SMART, ePlanner & ePortal.
Design & development of Global eXchange.
Configuration and administration of LAN & WAN.
Field Engineer, Development Manager, Technical Director.
Production of very many bespoke applications.
Initial development of SMART.
The 2 main areas of the App are delivered using a customised WebView together with Html. In one case static Html pages are rendered based on MVC originals together with models derived from the local database. In the second case, pages are rendered using React with bi-directional JavaScript integration to both deliver and update models.
Techniques used include the elimination of raster images throughout, these are replaced with scalable SVG alternatives. Background processes are used to provide data synchronization with the server. Etag concepts are used to deliver updated content from the server when needed. Custom data migrations are used to maintain the DB Schema on application updates. IOC is provided using Autofac and logging is based on Serilog.
Git (BitBucket) was used for SCC and Slack for team communications.
Will Ward, Managing Director: "John integrated quickly and easily into the team and worked as a critical member in delivering a complex, multiplatform application. He grasped the concepts and was up to speed and contributing in no time. The application launched on time, in budget and is now being rolled out to the global market.".
The app is built using Xamarin Forms, data is persisted locally using SQLite and synchronised bi-directionally with back office systems based around MS Sharepoint. Syncfusion products have been used to provide comprehensive charting capabilities together with other useful controls and PDF generation.
Custom controls and custom renderers have been developed to provide highly specific visual presentation capabilities in addition to extending functionality to existing controls. IOC is provided by Autofac, logging using Serilog, model mapping with ExpressMapper and drawing using SkiaSharp. The MVVM pattern and XAML has been used throughout to provide a clean separation of UI and business logic and to improve the coverage and value of Unit Tests.
Andy Skarzynski, Head of Marketing: "John took an ill-conceived trial product and rebuilt it as a simple to use application that offered an intuitive and logical user path. The intended audience are now adopting the tool and we are now starting to get the commercial advantage we targeted.".