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About Callsign

How it all started

A brief history of Call Signs

Call signs were first used in the early twentieth century in broadcasting and radio communications. Telegraph lines were installed alongside the existing railroad network so telegrams could be sent from one station to another.

As the lines got longer and the number of stations increased, it was agreed that a system was needed to clearly identify where a telegram message started and ended. Each station was given a unique identifier to accompany the telegram – a call sign. Ever since, call signs have been used by the military and in ground, sea and air travel. They are even used in space.

In the same way that call signs were used to identify exactly where a message originated from, we have built a system that means that if a transaction is carried out with your Callsign, it can only have come from you. The app has been developed with the highest security standards built in – similar to those used by leading banks. So, however you use your Callsign, you can be safe in the knowledge that everything you do is private and secure.

The faces behind Callsign

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CEO & Founder
Zia Hayat
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COO
Ian Welch
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Business Development
Vas Ketavarapu
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Head of Development
Chris Hutton
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Head of Technical Consulting Services
Ivan Milenkovic
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Operations Manager
Shaleen Karim
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Head of Customer Service
Nsonje Siame
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Platform Engineer
Warren Taggart
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Android Developer
Marcel Broz
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Head of Infrastructure
Adrien Pujol
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Senior Platform Engineer
Tom Wright
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Head of QA
Gergo Tamas
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Test Engineer
Simon Joshi
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Quality Engineer
Gabor Major
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Quality Engineer
Stephen Whitmey
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Head of Product & UX
Mustafa Zafar
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Creative Designer
Peter Gabriel
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Platform Team Lead
Jon Guymer
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Senior Platform Engineer
Daniel Andion
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iOS Developer
Dan Mac Hale
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Senior Security Engineer
Tom Cosgrove
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Principal Engineer
Laurent Bertrand
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Lead Android Developer
Yanislav Mihaylov
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Infrastructure Engineer
Jorge Pino
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Android Devloper
Liudas Survila
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Head of Mobile
Julio Sevillano
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Senior Platform Engineer
Jean Philippe Courson
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Infrastructure Engineer
Matthew Costa
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Senior iOS Engineer
Rohinton Collins
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Data Scientist
Matthew Marshal
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Head of Fraud Analytics
Christopher Stephens
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Technical Services
Nuno Severo
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DevOps Engineer
Plamen Dimitrov
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Team Lead Platform Engineer
Daniel Nenkov

Integrate Callsign with everything

Integrate with your favourite SaaS Apps, VPN Clients and anything else you can think of.

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