Gregory Mitten
Founder at OPPI: Opportunity starts here
Barcelona, Catalonia, Spain
Summary
👤
Senior🎓
Top SchoolGregory Mitten is a founder and software engineer with a decade of experience building data-driven marketing and automation platforms, currently leading OPPI to bring an AI-enhanced proprietary marketing product to market. He has deep practical experience as Head of Data/independent engineer for Catalyst Property Finance, previously owning key integrations at Adyen and delivering enterprise automation from consultancy to production. Gregory combines hands-on backend expertise (Java, Spring, data pipelines) with curriculum design and mentorship—he’s created Java and Spring Boot bootcamp courses and maintains a high-rated MentorCruise profile. Based in Barcelona, he blends startup grit with fintech-grade reliability, and quietly balances product strategy, engineering delivery, and mentoring as part of his practice.
10 years of coding experience
5 years of employment as a software developer
Master's degree Advanced Computer Science, Master's degree Advanced Computer Science at University of SussexBachelor's degree with Industrial Placement Software Engineering, Bachelor's degree with Industrial Placement Software Engineering at Bournemouth University
Github Skills (68)
displays10
price-data10
visual-studio-code-extension9
traits9
constraint8
factorization8
intervals7
java7
spring7
footprint7
react-native-app6
science6
formatter6
docker6
dsl6
Programming languages (7)
Github contributions (5)
Gregam3/UKHousePriceHeatMap
Oct 2018 - Aug 2020
A react native app that displays house price data for UK (pictures in readme). Main technologies: Java (Spring)/ReactNative/Docker/TravisCI
Contributions:5 releases, 270 commits, 101 PRs in 1 year 9 months
reacthousetechnologiespicturesdisplays
ASEGroup1/Tempus
Feb 2019 - May 2019
A University Timetabling implementing a custom compiled DSL allowing for custom constraint. University of Sussex Advanced Computer Science (MSc).
Contributions:2 releases, 158 commits, 59 PRs in 3 months
sussexcppsciencefactorizationdsl
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