Founded by IT and Telco Professionals focusing on High Value Added Solutions. Company’s Experts have more than 20 Years of Experience by facilitating disruptive Innovations in the Intersection between IT and Telecommunications.


Our Philosophy is to develop long-term Relationships with Customers, Partners, Employees and Suppliers.
Company name – Addendum – comes from the Latin language where it means continuous. This title expresses the Company’s view on our provided Services – we strive to provide continuous Solutions.


Every Project gives Us EXPERIENCE, every Business Meeting – NEW INSIGHTS, every Lunch Break – IDEAS.
Today We are better than We were Yesterday, so come see Us Tomorrow!

We are a dynamic and forward thinking Company, so we set ourselves ambitious Goals. Vision is a long-term Goal, which will require a number of Years to work on, but it's really worth it!


More information about the Fortune 500.

You may forget our faces, but you will remember results we have achieved while working together



YOU CAN rely on our Certified

UML Professionals

Scrum Masters

Database Developers

Java developers

Quality Engineers

Project Managers


Telia Company

Telia Company AB is the dominant telephone company and mobile network operator in Sweden, Finland and Baltic States. The company has operations in other countries in Northern and Eastern Europe, and in Central Asia and South Asia, with a total of 182.1 million mobile customers (Q1, 2013). It is headquartered in Stockholm and its stock is traded on the Stockholm Stock Exchange and on the Helsinki Stock Exchange.

Telia Lietuva

Telia Lietuva continues the activities of Teo, Omnitel and Baltic Data Center and is the part of an international Telia Company Group. After the reorganisation and change of the name on 1 February 2017, Telia provides the telecommunications, IT and TV services from a single source, servicing customers at joint retail outlet and by one short number.

DPD Lithuania

Anytime, anywhere: DPD is one of Europe's leading providers of parcel services, which makes the company a reliable partner for both domestic and international parcel shipping. We don't just operate a highly efficient transport network with over 500 of our own depots in more than 30 countries, we also develop individual solutions so that you have fast access to all the world's major business regions.

As a leading provider of standard and express parcel services DPD operates day in day out on behalf of thousands of satisfied customers. We are part of the international DPD network and are also experts in our own domestic market. Communication is a priority at DPD – with customers, journalists and potential employees. As a company we are also very much aware of our social responsibilities.

Microsoft partner since 2011

Member of Apple and Google developer programs since 2012


TED: Ideas Worth Spreading

TED is a platform for ideas worth spreading. Started in 1984 as a conference where technology, entertainment and design converged, TED today shares ideas from a broad spectrum — from science to business to global issues — in more than 100 languages. Meanwhile, independent TEDx events help share ideas in communities around the world.

"Marshmallow Challenge"

Tom Wujec: Build a tower, build a team

Tom Wujec presents some surprisingly deep research into the “marshmallow problem” — a simple team-building exercise that involves dry spaghetti, one yard of tape and a marshmallow. Who can build the tallest tower with these ingredients? And why does a surprising group always beat the average?

Derren Brown: The System (2008)

Illusionist Derren Brown has developed a “guaranteed” method for winning on the horses. He reveals how it works in his new Channel 4 special The System

Los Angeles Office

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Addendum Group Inc.
13955 Tahiti Way #354
Marina Del Rey
Bank of America
Bank of America, N.A.
222 Broadway
New York, NY10038

Vilnius Office

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UAB Addendum Solutions
Konstitucijos pr. 21C, 08130 Vilnius, Lithuania

AB Swedbank
73000, SWIFT Code HABALT22
LT17 7300 0101 1446 7413
VI Registru centras, Vilnius department