Holt has overseen significant changes since joining Trainline in 2014, including a massive migration to AWS from its former on-prem infrastructure.
His technology background is extensive, with positions at FT.com, Avis Europe and CPA Global to his name.
Holt's next step is to go for peoples' pockets - or more accurately, their mobiles, with continued development of the Trainline mobile app.
Although its base is in London, Code Enigma has no central location and has always operated remotely
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