We fix, develop and test embedded software for the aerospace & defence industry specialising in DO-178C safety-critical testing
Why Use US FOR DO-178C?
We simplify DO-178C safety-critical development for clients by providing a third-party service that handles the stringent safety testing, extensive verification, traceability, fault tolerance, systems integration, documentation and compliance.
Along with utilising an in-house cutting-edge software toolset, designed entirely around the needs of DO-178C, the service bridges a skills gap and brings to the table considerable expertise and experience from prior DO-178C projects.
By leveraging our mastery of DO-178C development and testing, clients reduce cost, mitigate risk and deliver high-quality, certified systems.

The Markets We Serve
We specialise in DO-178C safety-critical testing but have wide experience in developing embedded systems in the following industries:
Aerospace & Defence
We fix, develop and test complex avionic systems to the DO-178C standard up to Level A.
Space
We deliver Continuous
Integration and Continuous Test for Space Systems.
Medical
We can help to create devices that have unique challenges of power, weight, and reliability.
Automotive
We have helped major Automotive companies to develop and test Advanced Driver Assistance Systems.
The Capabilities We Have
DO-178C Safety-Critical Testing
Bare Metal
Systems Integration
BSPs & Drivers
Real Time OS
Embedded AI & Machine Vision
Security

Our Work
Our Embedded Software Development Services Portfolio
See What Our Customers Are Saying
HSS worked on a project whereby they needed to implement a new PPC architecture (the 8 core P4080) for the VxWorks RTOS and develop a BSP with very complicated hardware. This was no easy job and they managed to get it done by diving very deep into the matter and solved many problems on the way.

Partners
Check Out The HSS Blog
Rust on a Raspberry Pi – Part 1
Rust is a powerful and safe language for embedded systems. Discover how we create a Bare Metal Rust application that runs on a Raspberry Pi.
Spacemacs in a Docker Container Ep 1 – Install, Build and Run
Create a fresh dev environment that utilises Spacemacs and Docker; razor sharp tools for top quality embedded software development & testing.
Better Quality Design Docs with Graphviz
Graphviz is a powerful, free, opensource graph visualation software. See how Harmonic Software Systems use it in their workflow to optimise design documents.

White Paper

Fix, Develop & Test Embedded Software In A Game Changing Way | A DO-178C Software Blueprint For The Aerospace & Defence Industry
This backgrounder whitepaper defines an ecosystem of software tools that work in synergy to provide a powerful reproducible system for delivering DO-178C projects. It looks at the current landscape of software used and the inherent problems within the existing approach. Its purpose is to demonstrate a world-class collective of software tools and optimal workflows to be used at the organisational and human level.
The software ecosystem proposed is that used by Harmonic Software Systems and has evolved over many years and projects. Ultimately, the whitepaper seeks to provide a solution to the problem of embedded software that is ‘not fit for purpose’ because it doesn’t work or meet requirements and is therefore DO-178C non-certifiable.
Such is the complexity and difficulty of landing DO-178C projects on time and budget; the whitepaper advises on how to deliver superior embedded software solutions so clients are both profitable and delighted. We would love your feedback. Thanks