Quintonn Rothmann, Developer in Chichester, United Kingdom
Quintonn is available for hire
Hire Quintonn

Quintonn Rothmann

Verified Expert  in Engineering

Software Developer

Chichester, United Kingdom
Toptal Member Since
July 4, 2013

Quintonn is a passionate software developer who's always looking for ways to improve. With over 10 years of experience, he's worked as part of very small (two members) and large (six or more) teams. During that time, he's held several positions, including lead developer.


XSLT, XSD, XML, CSS, HTML, Java, JavaScript, TypeScript, React, .NET...
Orion Health
SAP, Java, REST APIs, Microsoft SQL Server, Back-end, REST
Securities and Trading Technology
CruiseControl, NAnt, Windows Communication Foundation (WCF)...




Preferred Environment

Flexibility, REST

The most amazing...

...software I've been responsible for was a Delphi application to communicate with both fuel dispensing machines and a legacy POS at a fuel station.

Work Experience

Full-stack Developer

2015 - PRESENT
  • Developed and implemented front-end and back-end software.
  • Assisted with sales and pre-sales duties as well as product demonstrations and presentations.
  • Developed custom Java components using OSGi and trained junior developers.
  • Worked extensively with HTML, JavaScript, CSS, and XML to configure the software.
  • Implemented web service calls and API calls as part of software implementation.
  • Worked with Oracle, Postgress, and MSSQL databases, creating queries, views, etc.
Technologies: XSLT, XSD, XML, CSS, HTML, Java, JavaScript, TypeScript, React, .NET, Asynchronous Programming, Pub/Sub, REST APIs, Microsoft SQL Server, Back-end, REST, Angular, Azure, Bootstrap

Contract Developer

2013 - 2015
Orion Health
  • Developed a SAP plug-in for one of the company's products (Rhapsody Integration Engine).
  • Created architectural design documents of project.
  • Assisted with testing and fine tuning.
  • Met with clients to obtain precise requirements.
  • Performed on site testing.
Technologies: SAP, Java, REST APIs, Microsoft SQL Server, Back-end, REST

Lead Developer

2009 - 2013
Securities and Trading Technology
  • Converted legacy code to Pascal .NET.
  • Started and led development of a financial accounting system.
  • Interacted with clients to obtain requirements and specifications.
  • Designed various layers of application architecture for re-use in other projects.
  • Wrote up and managed documentation.
  • Trained and mentored new employees.
Technologies: CruiseControl, NAnt, Windows Communication Foundation (WCF), Microsoft Silverlight, NHibernate, .NET, Chrome, C#, Asynchronous Programming, REST APIs, Microsoft SQL Server, Back-end, REST

Junior Delphi Developer

2007 - 2008
Regal Computer Consultants
  • Maintained legacy Pick/BASIC Point-of-Sale software.
  • Started project to convert legacy code to Delphi.
  • Created Delphi application for controlling fuel dispensing machines and integrated into legacy Point-of-Sale software.
  • Created application for steel cutting company to calculate most effective way to cut steal .
Technologies: SQL, Pick D3, BASIC, Delphi, REST APIs, Microsoft SQL Server, Back-end, REST

qBic Open Source Platform

A platform for creating web servers, back-end solutions, CRM, or CMS systems in .Net 5.

qBic is powered by a code-driven configuration. The entire application is built using C# code. With qBic, you can create admin portals, dashboards, CMS sites, identity servers, and much more. All of this can be done while only writing .Net code, no HTML, JavaScript, or CSS. A lot of the magic is driven by abstract classes and inheritance.


XML, HTML5, CSS3, HTML, CSS, C#, TypeScript, JavaScript, Delphi, SQL, BASIC, XSD, XSLT, Java, C++, GraphQL


.NET 4, .NET, .NET Core, .NET 5, ASP.NET, NHibernate, Angular, Chrome, Windows Presentation Foundation (WPF), WIF, Bootstrap


LINQ, React, REST APIs, jQuery


Microsoft Visual Studio, Microsoft Silverlight, Jira, Mercurial, Subversion (SVN), Bitbucket, Prism, NAnt, PostSharp, Turbo Pascal


Cordova, HTTP REST, Back-end, Pub/Sub, CruiseControl, Flexibility, SAP, Windows Communication Foundation (WCF), W3.CSS, Programming, Complex Problem Solving


Unit Testing, Inversion of Control, Dependency Injection, Test-driven Development (TDD), Asynchronous Programming, REST


Windows, Azure, Pick D3, Android


Microsoft SQL Server

2010 - 2015

Honours Degree in Computer Science

University of South Africa (UNISA) - Pretoria, South Africa

2003 - 2009

Bachelor's Degree in Computer Science

University of South Africa - Pretoria, South Africa

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.


Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring