We figured IT out

ADDENDUM is a software development and IT outsourcing company with more than 20 years of hands-on experience by serving Financial services, Telecom, and smart Government industries in the US and Europe.

The company specializes in business process analysis & optimization, system integration, maintenance, optimization, custom development, mobile app development and maintenance.

We have been consistently expanding our business geography to Europe, mainly to Baltic Countries: Lithuania, Latvia, and Estonia.

Lithuania boasts of skilled talent, innovative infrastructure, progressive regulation, local support, and strong international connections. All these features in one location lead us to situate our main IT service center in Vilnius to perfectly serve our customer in Banking, Fintech, and Telecom industries.

Now we have more than 150 employees and offices in Los Angeles, Vilnius, Riga, and Tallinn.

Our philosophy is to develop long-term relationships with Customers, Partners, Employees, and Suppliers. The long-term partnership ensures three main things: exceptional industry knowledge, superior team performance (the team members act as a fully integrated, fully agile team of subject-matter experts) and proofed track record


Companies like Western Union, Lietuvos bankas, SEB, Danske Bank, Luminor group, and Telia Company trust us to deploy enterprise technology stack to deliver new levels of performance, competitiveness, and customer experiences.

Certifications/Compliance

ISO 9001:2015
ISO 27001
United States United States
13163 Fountain Park Dr B128 , Playa Vista, California 90094, Los Angeles, California 90094
+37061459093
$50 - $99/hr
50 - 249
2009

Service Focus

Focus of Software Development
  • Java - 50%
  • PHP - 5%
  • AngularJS - 5%
  • C# - 10%
  • Python - 5%
  • Node.js - 5%
  • .NET - 10%
  • Symfony - 5%
  • ReactJS - 5%
Focus of Mobile App Development
  • iOS - iPhone - 20%
  • Android - 20%
  • iOS - iPad - 5%
  • Enterprise Apps - 10%
  • Web Apps - 10%
  • Flutter - 10%
  • Xamarin - 20%
  • React Native - 5%
Focus of Web Development
  • Drupal - 60%
  • Sitecore - 20%
  • Umbraco - 20%

Industry Focus

  • Financial & Payments - 50%
  • Telecommunication - 20%
  • Information Technology - 10%
  • Business Services - 5%
  • Transportation & Logistics - 5%
  • E-commerce - 5%
  • Insurance - 5%

Client Focus

50% Medium Business
30% Large Business
20% Small Business

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