John Sutcliffe, Developer in Dortmund, North Rhine-Westphalia, Germany
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John Sutcliffe

Verified Expert  in Engineering

Software Engineer and Developer

Dortmund, North Rhine-Westphalia, Germany
Toptal Member Since
April 1, 2021

John is a developer with 15 years of experience creating commercial software. He is an expert in back-end projects using C# with top skills in JavaScript, Angular, and React. He created a sophisticated booking application that enables universities to manage and optimize the use of their resources. John has developed cloud-hosted products, including some that used a microservice architecture hosted in Docker.


C#, ASP.NET, AngularJS, Docker, Entity Framework, REST, .NET, TypeScript...
React, JavaScript, Docker, Node.js, Express.js, .NET, OpenID, OAuth
C#, C#.NET, Microservices, REST, Azure, Windows Forms (WinForms), Oracle...




Preferred Environment

C#, ASP.NET, AngularJS, Docker

The most amazing...

...application I've developed was for universities that enabled them to manage and optimize the use of their resources.

Work Experience

Senior Developer

2019 - 2021
  • Developed a microservice application using C# ASP.NET and AngularJS. The applications allow users to manage a production job's lifecycle from the initial quote generation to the final inspection of the produced part.
  • Integrated onsite legacy applications using message queues. This was developed using RabbitMQ.
  • Added authentication to the application using the OpenId protocol. I designed a model that enabled the mapping of a user’s details from the onsite identity provider to application permissions.
  • Developed a build pipeline in Azure DevOps to create the application, run the unit test, and publish the Docker containers.
Technologies: C#, ASP.NET, AngularJS, Docker, Entity Framework, REST, .NET, TypeScript, OpenID, OAuth, JavaScript, C#.NET, .NET Core

Software Architect

2018 - 2019
  • Developed Node.js microservices for processing B2B financial transactions using RabbitMQ and Azure message bus to process messages. Developed a micro-UI using React.
  • Created a token service that issues JWTs for use in the product’s API. Tokens are issued using the OpenID protocol.
  • Developed a user notification service and designed a preferences model which allowed individual customers to create notification lists and configure how they want to be notified.
  • Built a token service that issues JWTs for use in the product’s API. Tokens are issued using the OpenID protocol.
Technologies: React, JavaScript, Docker, Node.js, Express.js, .NET, OpenID, OAuth

Senior Software Engineer

2010 - 2017
  • Delivered a variety of projects developing resource scheduling applications for higher education.
  • Re-architectured a legacy application in a hosted C# microservice application running in Azure.
  • Expanded and improved a WinForms application that synchronized data via message queues to a hosted web application.
  • Created a data transfer tool to import reference data from Oracle and SQL Server databases into a SQL Server database. This greatly reduced the time required to perform the transfer compared to the previous version of the application.
  • Presented software at user conferences and user groups. Ran internal training courses for the support and consultancy teams.
  • Coordinated back-end development with an outsourced front-end development team.
  • Authenticated web applications using the SAML protocol.
Technologies: C#, C#.NET, Microservices, REST, Azure, Windows Forms (WinForms), Oracle, Microsoft SQL Server, ASP.NET, MongoDB, Presentations, .NET, TypeScript, OAuth, JavaScript, .NET Core

Software Engineer

2008 - 2010
  • Developed web parts and workflows in SharePoint for managing documents associated with the oil and marine exploration industry.
  • Served in a specialist web development team within AVEVA to provide web development support to projects. This included providing training through Wikis. I presented a guide to using templates in ASP.NET and SharePoint.
  • Assisted the development team architecture control group to analyze the generic web controls and determine which ones should be developed for reuse across all projects.
Technologies: SharePoint, Microsoft SQL Server, Web Applications, .NET, C#.NET, .NET Core

Software Engineer

2003 - 2008
Granta Design
  • Created applications for managing and capturing engineering data in the aerospace industry.
  • Assisted in the development of all parts of the software including the data layer, business logic, interfaces, and the Windows and web applications using WinForms and ASP.NET.
  • Created a secure, scalable web application with C#, ASP.NET, and AJAX. The web application was required to handle 10,000s of users.
  • Presented projects to customers at a biannual user group.
  • Collaborated with customers on several projects to develop tools to analyze their test data and import it into the application.
Technologies: C#, Microsoft SQL Server, Windows Forms (WinForms), ASP.NET, Regular Expressions, Excel VBA, .NET, JavaScript, C#.NET, .NET Core

Resource Booker

This is a C# ASP.NET and Angular application developed for universities to manage their resources. For example the booking of conference rooms.

I developed and architectured the back-end ASP.NET application and coordinated with an outsourced developer who created the front-end UI. I designed an object model that enabled universities to group their resources and then assign availability and access to groups. This allowed the university to restrict students from booking certain rooms at certain times of the day. Staff members could use the same UI to book from a larger pool of rooms with more flexibility over the times they were allowed to book the rooms.

I implemented an approval workflow for the booking of the resource. This enabled the university to either allow the user to book a resource immediately, as long as it was available, for example, audio-visual equipment. However, they could also require approval for some types of bookings, such as a room booking where a student group had invited an external speaker to present to the students.


C#, C#.NET, JavaScript, Excel VBA, TypeScript


ASP.NET, .NET, .NET Core, AngularJS, Express.js


Web Applications, OAuth, Mathematics, Materials Science, Engineering, Science, Research, Presentations, Regular Expressions, API Design


Entity Framework, OpenID, React, Node.js, Windows Forms (WinForms)


Microservices, REST


Docker, Azure, Oracle, SharePoint


Microsoft SQL Server, MongoDB, NoSQL

Industry Expertise


1999 - 2002

Master's Degree in Materials Science and Engineering

Birmingham University - Birmingham, England

1996 - 1999

Bachelor's Degree in Materials Science and Engineering

Imperial College - London, England