We build software solutions you can trust

We are passionate about building high quality, high performing custom software solutions

Thirteen Castles Digital is a software development consultancy focused on delivering high quality custom software solutions. Led by Edwin Marcial, founding CTO of Intercontinental Exchange (ICE), Edwin brings the passion and approach he used to build ICE from a startup to a Fortune 500 financial powerhouse to deliver results for others.

Great people, processes combined with a knack for innovation and excellent product design. The ability to see the winds of change in technology and innovation and to see things not as they are, but as they can be, and bring your reality to exceptional realization. 

From Inc Magazine: Perhaps the biggest break came when SnapNurse* hired Edwin Marcial as interim CTO … Marcial had built the technology behind Intercontinental Exchange (ICE), the powerful Atlanta company that acquired and operates the New York Stock Exchange. Hiring the guy who built one of the world’s fastest trading systems proved to be critical; the infrastructure Marcial and a team of ex-ICE engineers created for SnapNurse was highly flexible and scalable.

*SnapCare was formerly known as SnapNurse

SnapCare* - #2 on the Inc 5000 fastest growing private companies in America. 


Platform design and development


Systems design and developement


Platform design and development

Far Peak Acquisition Corp

Bullish Exchange Technology Due Diligence


Technology Review

Lynk Social Events App

Platform design and development, mobile app development

Kelly Loeffler

Website development


Platform design and development

Application and mobile app development

Platform design and development

Platform design and development

Application development and CTP placement

Technology due dilligence

We’ve designed and built two unicorns from inception. What can we build for you?