Hamish Mason

Overview

15 years in software engineering, the last 1 at Wise, where I lead the product security team. Cut p99 latency on the product security services from 714ms to 146ms. Before that: Booking.com and Goldman Sachs. Chess on lunch breaks.

Replies on weekday evenings

Experience

1. Senior Engineering Manager

   Aug 2025 - Present
   Wise · 1 yr 2 mo · Full-time · Edinburgh, UK
   • Shipped a rewrite that took build times from 15 minutes to under 6.
   • Built the experimentation framework 37 product teams use to ship changes safely.
   • Grew the product security team from 3 to 26 engineers.
2. Security Engineer

   Nov 2023 - Aug 2025
   Booking.com · 1 yr 9 mo · Full-time · Edinburgh, UK
   • Cut p99 latency on the product security services from 372ms to 48ms.
3. Engineering Manager

   Sep 2022 - Nov 2023
   Goldman Sachs · 1 yr 2 mo · Full-time · Edinburgh, UK
   • Cut p99 latency on the product security services from 895ms to 46ms.
4. Senior Security Engineer

   Nov 2020 - Sep 2022
   Google · 1 yr 10 mo · Full-time · Edinburgh, UK
   • Moved 93% of product security traffic off a legacy monolith without a customer-facing incident.
5. Staff Security Engineer

   Jan 2018 - Nov 2020
   EY · 2 yr 10 mo · Contract · Edinburgh, UK
   • Brought on-call pages for product security down from 25 a week to 2.
   • Led the migration of 55 services to cloud security.

No references yet.

Education

1. University of Cambridge

   BA, Mathematics
   2007 - 2010