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Dionysis Kastellanis

Founder, CTO at Hello Radius

CTO C-Suite
d***@helloradius.com Sign up
Pro only
Pro only
Nicosia, Nicosia, Cyprus
helloradius.com

Company Details

Company: Hello Radius
Industry: information technology & services
Employees: 3
HQ Location: Nicosia, Nicosia, Cyprus
Company LinkedIn: Pro only

Technology Stack

Gmail Google Apps Google Tag Manager Mobile Friendly

Professional Summary

Dionysis Kastellanis is Founder, CTO at Hello Radius. Hello Radius operates in the information technology & services industry and has 3 employees. Based in Nicosia, Nicosia, Cyprus. Classified as a c-suite-level CTO leader. Their organization's technology stack includes Gmail, Google Apps, Google Tag Manager, Mobile Friendly.

Industry & Role Insights

  • • CTO Rank tracks 138,833 CTO leaders with verified contact information.
  • • There are 166,587 tech leaders in the information technology & services industry in our database.
  • • 57 tech leaders in Nicosia are available in our database.
C-Suite level · CTO
Verified Apr 30, 2026

Position in the CTO Rank Database

  • • Dionysis Kastellanis is 1 of 140,489 leaders with the CTO role tracked in the CTO Rank database.
  • • 62,499 hold the CTO role at information technology & services companies (out of 167,492 total information technology & services leaders in our database).
  • • 30 hold the CTO role in Nicosia.
  • • 5,979 hold the CTO role at companies with 3 employees.

Data sourced from 484,726 tech leadership profiles. Updated May 2026.

Frequently Asked Questions

How do I contact Dionysis Kastellanis?

Dionysis Kastellanis has a verified email address on file on CTO Rank. They work at Hello Radius. Pro members can access direct email addresses, LinkedIn profiles, and phone numbers.

What company does Dionysis Kastellanis work for?

Dionysis Kastellanis is Founder, CTO at Hello Radius, a company in the information technology & services industry with 3 employees. The company is headquartered in Nicosia, Nicosia, Cyprus.

What is Dionysis Kastellanis's role in technology leadership?

Dionysis Kastellanis is classified as a CTO leader at the c-suite level.

What technologies does Dionysis Kastellanis's organization use?

Dionysis Kastellanis's organization uses a technology stack that includes Gmail, Google Apps, Google Tag Manager, Mobile Friendly. This information is useful for sales teams, recruiters, and technology vendors.

Is Dionysis Kastellanis open to recruiting or new opportunities?

CTO Rank does not track open-to-work status. The best approach is to reach out directly to Dionysis Kastellanis using the verified contact information available to Pro members. When recruiting a Founder, CTO, personalizing your outreach with specifics about the role and tech stack typically yields the best response rate.

Can I pitch or sell to Dionysis Kastellanis at Hello Radius?

Dionysis Kastellanis is Founder, CTO at Hello Radius. CTOs like Dionysis Kastellanis typically evaluate vendors in Gmail, Google Apps, Google Tag Manager, and related categories. Use CTO Rank Pro to get verified email and approach directly.

How accurate is Dionysis Kastellanis's profile data?

CTO Rank verifies and refreshes profile data weekly. Dionysis Kastellanis's profile includes verified contact details, company information, and technology stack data sourced from multiple public and proprietary sources.