James Stewart is Chief Architect at the Government Digital Service and deputy to the UK Government CTO. He leads a team of architects, developers and operations engineers who are at the heart of transforming government services. He works across government, helping establish a user-centric and platform-based architecture for government services.

He was responsible for the technical architecture of the award winning GOV.UK, building the acclaimed team behind it, and transforming the UK Government's relationship with open source by "coding in the open." He’s been instrumental in the UK government’s move to use of public cloud and coordinates the network of senior technology leaders across government.

Prior to joining the civil service James ran an agency providing websites, business tools and product development to a range of small businesses, charities and entertainment industry clients. He's a regular conference speaker covering topics from technical architecture and modern development techniques to digital transformation.