ADDENDUM is a forward-thinking software development and IT outsourcing powerhouse with a rich history spanning over two decades. Our expertise extends across various sectors, catering to Financial services, Telecommunications, and cutting-edge Government solutions in both the US and Europe.

We excel in a wide array of services including business process analysis and optimization, seamless system integration, meticulous maintenance, bespoke development solutions, as well as innovative mobile app creation and upkeep.

Our reach has steadily expanded, particularly in Europe, with a strategic focus on the Baltic region encompassing Lithuania, Latvia, and Estonia. Lithuania, in particular, offers a unique blend of skilled professionals, state-of-the-art infrastructure, forward-looking regulations, local support, and robust international networks.

This ideal mix led us to establish our primary IT service hub in the vibrant city of Vilnius, positioning us perfectly to serve clients in the Banking, Fintech, and Telecom sectors.

Today, boasting a team of over 150 dedicated professionals, we operate from key locations including Los Angeles, Vilnius, Riga, and Tallinn.

At ADDENDUM, we believe in fostering enduring relationships with our Clients, Partners, Employees, and Suppliers. This commitment to long-term partnerships underpins our exceptional industry insights, top-notch team performance, where members collaborate seamlessly as experts in their fields, and a proven track record of success.

Major industry players like Western Union, Lietuvos bankas, SEB, Danske Bank, Luminor group, and Telia Company entrust us to implement cutting-edge enterprise technologies that drive enhanced performance, bolster competitiveness, and revolutionize customer experiences.