Josh Sephton

I'm an ambitious hands-on software engineering leader who builds high performing teams, enabling them to do the work of their careers. With an impressive track record, I have conceptualised and delivered complex scalable B2C and B2B products. Having recently led both small and bigger organisations as interim Chief Technology Officer (CTO), I'm now looking for a permanent full-time role in an environment that values an entrepeneurial culture. We'll be a good fit if you have hard problems and big growth plans.


McCann iO (part of McCann Worldgroup)

Interim CTO

October 2019 — April 2020
  • Audited, identified, and addressed reasons for three under-performing engineering teams
  • Re-shaped engineering delivery strategy for key accounts
  • Provided a framework to ensure continued high performance

Hilton Worldwide

Interim Engineering Director

June 2019 — March 2020
  • Consolidated 20 web properties to single a platform and provider
  • Re-negotiated legacy partner SLAs to better fit the current needs of the business, saving £620,500 a year.
  • Designed a new platform technology roadmap for EMEA destination marketing team

Attraction World

Interim CTO

October 2019 — March 2020
  • Assessed the incumbent ERP system to determine if it was fit-for-purpose in the new landscape
  • Identified and engaged new supplier to replace legacy tech
  • Provided a technology roadmap to grow from £50M to £100M revenue

Vet AI

Interim CTO

August 2018 — August 2019
  • Grew engineering team from 0 to 10 FTE
  • Owned product strategy and delivery from idea to revenue in 9 months
  • Raised £2.3M Series A round at £10M valuation

Push Doctor

Head of AI

April 2017 — August 2018
  • Created a strategic vision for AI in healthcare, delivered to the board
  • Reduced customer service requests by 20% using a chatbot with no negative impact on NPS
  • Architechted and implemented automatic consultation transcription pipeline to fill a data lake


Lead Engineer

August 2016 — April 2017
  • Led a team of 14 engineers to develop automated PPC ad management
  • Architected a large, distributed system to manage hundreds of millions of adverts in AdWords and Bing
  • Created an internal SDK to allow the rest of the engineering team to contribute to the project, reducing cost of delivering new features


Principal Engineer

August 2015 — August 2016


March 2014 — August 2015
  • Led a team of 8 engineers to develop products for global brands
  • Created a user testing framework for Jaguar Land Rover as they developed a delivery-to-boot proposition
  • Owned the Cornerstone platform as it grew to £50M revenue

Exploding Phone

iOS Developer

February 2012 — March 2014
  • Built 20+ native iOS apps
  • Introduced agile development practices for team of 8 people
  • Managed projects ensuring they were delivered on-time and on-budget


Go, Java, JavaScript, PHP, React, Kubernetes, Docker, GCP, AWS, SQL, NoSQL

Agile methodologies (scrum, kanban, xp), lean start-up methodology, design thinking, human centered design

Thought Leadership

7 effortless ways to avoid an AI disaster @ Hackernoon

Do you understand? @ Birmingham AI Meetup

Artificial Intelligence is Child's Play @ Towards Data Science

A trip to Russia isn't all it seeems @ Voxxed Days, Zurich


Uni. of Birmingham

2009 — 2012
Theoretical Physics & Applied Maths

St Edwards School

2004 — 2008
A Level

Mathematics — A; Further Mathematics — A;
Physics — A; Chemistry — B.