We build reliable software for the desktop and the web.

Code Concise is a software design and development business based in South Wales, UK. We build desktop applications, web front ends and the systems behind them, and we bring nearly 30 years of experience across defence, commercial software and games.

codeconcise.uk
Based
South Wales, UK (remote preferred)
Available
Ready to start now
Engagements
Contract (long-term preferred)

Experience at a glance

~30
years’ software engineering experience
UK
based, working remotely
19
years in defence and secure systems
5
industry awards and nominations

What we do

The three areas we know best.

Desktop and native applications

Desktop software with rich interfaces, written in C# / .NET and C / C++, that stays fast and stable even under heavy load. Windows and its UI frameworks are our home ground.

Web applications and interfaces

Front ends in TypeScript, React and similar tools, backed by REST APIs and joined cleanly to the server behind them. Layouts are responsive, so they work on any screen.

Visualisation, simulation and mapping

Fast rendering for modelling, simulation and synthetic environments, drawing on years in the games industry. We also build custom GIS and mapping tools in 2D and 3D.

Where we work

Work where mistakes are expensive.

In these fields, software has to be correct, secure, traceable and fast as a matter of course. We're used to working from detailed specifications, keeping up as requirements change, and staying within the regulatory and security rules that come with the territory.

Sectors

  • Defence
  • Cyber security
  • Commercial
  • Games and interactive entertainment

Technologies

Tools and technologies we know well.

Desktop and core

  • C# / .NET 6+
  • .NET Framework 4.x
  • C / C++
  • WinUI 3 / WPF
  • MFC
  • Windows App SDK
  • Fluent UI
  • Multi-threading and async

Web

  • TypeScript
  • JavaScript
  • HTML and CSS
  • React
  • Aurelia
  • Tailwind
  • Bootstrap
  • Node.js
  • Express
  • TanStack
  • REST APIs
  • Frontend
  • Full stack

Graphics and visualisation

  • 2D / 3D rendering
  • GIS and mapping
  • DirectX
  • OpenGL
  • CUDA
  • Real-time simulation
  • Game technologies
  • Game engines

Data, cloud and tooling

  • SQL
  • MySQL
  • SQLite
  • Microsoft Azure
  • Git and GitHub
  • Visual Studio
  • VSCode
  • npm and nuget
  • Jira and Confluence
  • Agile / SAFe

Selected work

See all
OPFRAME's 3D view over sunlit valleys and a lake, with hundreds of blue and red military symbols across the terrain and aircraft symbols on stalks above it, and "Project: OPFRAME" in large lettering along the bottom.

Flagship project

ProjectPersonalSep 2026 - present

Project: OPFRAME

A Windows desktop application for viewing imagery, terrain and LIDAR in 2D and 3D, with APP-6 military symbols, overlays and orders of battle on top. Built in C# and WinUI 3, with a native C++ and Direct3D 12 renderer underneath.

3 videos · 3 explainers

  • C++
  • C# / .NET
  • WinUI 3 / Windows App SDK
  • Direct3D 12
  • HLSL
  • Graphics Programming
  • Real-Time Visualisation
  • GIS and Mapping
  • APP-6 / MIL-STD-2525
  • Application Development
The Diamond Motors wordmark alongside partial screenshots of their website.
ProjectClient2026

Diamond Motors (opens in a new tab)

A responsive, full-stack site for an independent automotive specialist, covering their services, booking enquiries and news. Bootstrap and JavaScript on the front, PHP and MySQL behind it.

  • HTML
  • CSS
  • JavaScript
  • Bootstrap
  • PHP
  • MySQL
  • WordPress Integration
  • Full Stack
  • Web Design
  • Web Development
An abstract montage of five stylised application windows, each in a different colour: a list of records, a properties form, a display panel with hardware keys, a grid of components and a tree view, with the title "Applications & Secure Systems".
ProjectClient2016 - 2025

Defence: Applications & Secure Systems

Several defence contracts delivering software into secure, regulated environments, from embedded interfaces and cryptographic key management to full technical ownership of a modern Windows planning and control application.

  • Defence
  • Secure Systems
  • Application Development
  • UI / UX
  • C# / .NET
  • WinUI 3 / Windows App SDK
  • WPF
  • C++
  • TypeScript / JavaScript
  • Embedded
  • Agile / SAFe
A montage of images showing various aspects of work covered in building and evolving an in-house modelling and simulation capability.
Project2007 - 2015

Defence: Modelling & Simulation and Visualisation

Eight years building and growing an in-house modelling and simulation capability for civil and defence use, covering distributed simulation, integration with other systems, and fast 2D and 3D visualisation.

  • Defence
  • Modelling and Simulation
  • Distributed Simulation
  • Systems Integration
  • Real-Time Visualisation
  • GIS and Mapping
  • Research and Development
  • C / C++
  • C# / .NET Framework
  • Web Technologies

Recommendations

What people we've worked with say.

These were written for Andy Eder, who runs Code Concise, by colleagues and managers he has worked with. You can read them all on LinkedIn (opens in a new tab).

I recruited Andy initially as a Software Engineer for the Modelling and Simulation team that I would later go on to lead… He has a rare mix of skills, in that he is an extremely able software engineer from a technical perspective, but also has a considerable artistic talent which comes through in his 3D and GUI work.

David Latheron

BLADE Architect, General Dynamics UK Limited

I found him to be proactive to the needs of the team, dedicated to the demands of the client and exhaustively hard working. His breadth of knowledge combined with a wealth of experience enables Andy to acquire new skills rapidly and adapt to the challenges of any new domain.

Tracy-Gregory Gilmore

Principal Frontend Software Engineer and Architect, CGI

I worked alongside Andy on a complex delivery (Approx. 200 Million GBP) for a major UK client… He is a good communicator at all levels of an organisation, and this makes him a strong team player. He is technically capable and is comfortable working on his own initiative in complex environments where requirements are sometimes very ambiguous.

Michael Sturmey

Scrum Master, General Dynamics UK Limited

Have a project or a role in mind?

We're always happy to talk about new projects or roles. Tell us what you're working on and we'll take it from there.