Stuart Klette, Developer in London, United Kingdom

Stuart Klette

Software Developer

London, United Kingdom
Toptal Member Since
October 25, 2017

Having come from an engineering and mathematics background, Stuart gained his stripes on the commodities trading floor at BP then WCAPRA. Currently, he works as the CTO of a startup with a varied portfolio including a number of joint ventures and client projects. He's worked on a wide range of development from large database development to the web to standards-based integrations and machine learning-based methods in the image recognition arena.

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Evolve IT
NGINX, Ansible, Docker, MongoDB, Node.js, OpenCV, C++, F#, TypeScript, React...
Azure Active Directory, LDAP, Windows Presentation Foundation (WPF), SQL, ASP...
TFS, FIX Protocol, DevExpress, Rx, Windows Communication Framework (WCF), VB...


London, United Kingdom



Preferred Environment

Visual Studio, Visual Studio Code (VS Code), Windows, Bash, Git

The most amazing...

...thing I've built was a global energy map—displaying tens of thousands of interactive energy assets on a map, showing e.g. ships, offshore meetings.

Work Experience

2015 - PRESENT


Evolve IT
  • Developed the Fit Vault app: a health rewards mobile and web application.
  • Developed an image recognition system for the Whizzky mobile app.
  • Supervised the transition of the Wine Wizard site to a new hosting and development stack.
  • Centralized an OAuth2 and OpenID multi-tenant service for serving a number of client applications.
  • Supported Fuel Forecourt in the monitoring and provision system for tracking tank levels and more.
Technologies: NGINX, Ansible, Docker, MongoDB, Node.js, OpenCV, C++, F#, TypeScript, React, Entity Framework Core, ASP, .NET Core, C#
2014 - 2015


  • Developed an SPML provisioning integration layer, to support a large (~200,000 users) migration to cloud-based email with split active directory responsibilities (cloud vs local).
  • Built a working prototype to provide pre-emptive notifications and remedy option during work-station lockouts across a large distributed active directory domain.
  • Supported and tuned (the performance) of an end-to-end ASP Web Forms application for managing the expected demand and provisioning of IT equipment.
Technologies: Azure Active Directory, LDAP, Windows Presentation Foundation (WPF), SQL, ASP, C#
2010 - 2014

Front Office Developer

  • Developed a trade blotter for automated capture of oil trades and subsequent integrations with existing volatility and pricing and exchange and FIX endpoints.
  • Developed an automated and integrated reporting tool to meet the Dodd-Frank requirement for EMIR, primarily reporting to the ICE Exchange.
  • Developed a trading simulator as a tool for teaching and assessing trading ability.
  • Initiated and implemented an ASP.NET front-end continuous-integration portal which connected TFS and Jenkins for the automated deployment of click-once applications.
  • Developed the Silverlight client for a global energy map, displaying tens of thousands of interactive energy assets on a map, showing ships, offshore meetings, trading routes, and more.
  • Supported a biofuels end-to-end application that was meant to assist operators and enable tighter trading by recording certification status and providing trading information based on biofuel certification systems, predominantly German.
  • Developed and supported large Excel pricing sheets, used as primary trading tools.
  • Supported all manners of trading related software and Excel trading sheets on the floor.
Technologies: TFS, FIX Protocol, DevExpress, Rx, Windows Communication Framework (WCF), VB, Microsoft Excel, MS Silverlight, Windows Presentation Foundation (WPF), SQL, C#


Fit Vault
A health rewards mobile and web app which connects users to gyms and rewards them for healthy activities.

Whizzky Image Recognition
An image recognition solution for our Whizzky mobile app.

F# Akka.NET Distributed Email Service

A distributed emailing service; albeit this is still a POC project, it is actively used in production and is very stable (so far no downtime).



C#, T-SQL (Transact-SQL), SQL, TypeScript, JavaScript, Bash, C++, VB, Visual Basic for Applications (VBA), F#, Visual Basic .NET (VB.NET)


Angular, ASP.NET Core, Entity Framework Core, Windows Presentation Foundation (WPF), .NET Core, Rx, OAuth 2, ASP, Express.js, Caliburn.Micro, Knockout (Knockout.js), Actionhero.js, Windows Communication Framework (WCF)


Docker, Xamarin, Windows, Visual Studio Code (VS Code)


React, Node.js, ReactiveX, OpenCV


Git, Excel 2016, Autofac, Ansible, Shell, Visual Studio, Microsoft Excel, TFS, MS Silverlight, Prism, NGINX


MongoDB, MySQL, Azure Active Directory


LDAP, Akka.NET, FIX Protocol, EF6 Code First, DevExpress, Identity Server


2001 - 2006

Bachelor's Degree with Honors in Electrical Engineering

University of the Witwatersrand - Johannesburg, South Africa