Paul Butcher


I am a technology start-up veteran, a consultant for start-ups and investors, and an author.

I was Chief Software Architect of SwiftKey, subsequently acquired by Microsoft. I went on to co-found English Language iTutoring, subsequently acquired by Cambridge Assessment English, and am currently CTO of XLIO Ventures.

I am the author of Seven Concurrency Models: When Threads Unravel and Debug It!: Find, Repair, and Prevent Bugs in Your Code, both published by Pragmatic Bookshelf.