Dionysios Zelios
Chief Growth Officer at Data Talks
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolDionysios Zelios is a Chief Growth Officer based in Stockholm with 11 years of experience building data- and AI-driven commercial systems that scale revenue across marketing, sales, customer success and partnerships. He combines a rigorous computational physics background (MSc) and Wharton training in business and financial modeling to translate complex data into go-to-market strategies, pricing frameworks and operational playbooks. At Data Talks he moved from customer success to head of marketing and now leads all growth, aligning cross-functional teams to create a unified customer experience and measurable revenue outcomes. His career blends hands-on marketing technology, analytics and automation (HubSpot, Power BI, marketing automation) with advisory work for large B2B clients, giving him a rare mix of technical craft and commercial instinct. Colleagues describe him as a builder who turns marketplace signals into tactical experiments and scalable systems rather than one-off campaigns. He often leverages scientific methods—hypothesis-driven testing and modeling—to de-risk GTM bets and accelerate predictable growth.
11 years of coding experience
4 years of employment as a software developer
Master of Science (MS) Computational Physics, Master of Science (MS) Computational Physics at Stockholm UniversityMaster of Science (M.S.) Computational Physics, Master of Science (M.S.) Computational Physics at KTH Royal Institute of TechnologySchool of Sciences (240 credits) Faculty of Physics, School of Sciences (240 credits) Faculty of Physics at Ethnikon kai Kapodistriakon Panepistimion AthinonSpecialization Business and Financial Modeling, Specialization Business and Financial Modeling at The Wharton School
Greek, English, Swedish
Stackoverflow
1reputation
0reached
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Github contributions (5)
DionysiosZelios/Machine-Learning-Python
Nov 2017 - May 2018
Contributions:50 pushes, 1 branch in 5 months
DionysiosZelios/Cohort-analysis
Oct 2017 - Oct 2017
Contributions:17 commits, 15 pushes, 1 branch in 9 days
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