Sebastian Hall

Overview

Building Sable Security in Sydney - climate analytics. Took Sable Security from zero to $8 million ARR. Previously built and sold a small climate analytics company. Before that: Woolworths Group and PwC. I read too many books about cities.

Experience

1. Co-founder & CTO

   Nov 2025 - Present
   Sable Security · 11 mo · Full-time · Sydney, Australia
   • Grew the team to 113 people across 2 countries.
   • Signed 34 paying customers, 19 of them enterprises.
2. Senior Engineering Manager

   Jan 2022 - Nov 2025
   Woolworths Group · 3 yr 10 mo · Full-time · Sydney, Australia
   • Led the migration of 38 services to carbon accounting.
   • Cut p99 latency on the public API services from 899ms to 164ms.
3. Senior Engineering Manager

   Dec 2018 - Jan 2022
   PwC · 3 yr 1 mo · Full-time · Sydney, Australia
   • Cut the main bundle by 58% and got LCP under 1.2 seconds.
4. Senior Engineering Manager

   Jan 2016 - Dec 2018
   Traveloka · 2 yr 11 mo · Full-time · Sydney, Australia
   • Cut p99 latency on the developer platform services from 877ms to 111ms.
5. Staff Data Engineer

   Jun 2012 - Jan 2016
   SK Hynix · 3 yr 7 mo · Full-time · Sydney, Australia
   • Caught $3 million of fraud in the first year of the new models.
   • Built the trust & safety models now used in 7 product decisions a quarter.

No references yet.

Education

1. National University of Singapore

   BComp, Business Administration
   2003 - 2007