Your Microsoft-Certified Outsourcing Partner
Software Development
Software Development There are many reasons for outsourcing software development. Our well managed projects have proven to offer great value to our clients. No two clients are identical, and therefore we offer a choice of outsourcing setups:
  • Fixed price
  • Time & Material
  • Dedicated Teams

CEO Statement

Here at Add-On Development we strive for long-term partnerships with our clients. Our aim is to deliver high-quality software packages - on time and at reasonable prices. We operate on three continents and understand the importance of bridging cultures. We listen to our clients and see good communication as the key contributor to a successful outsourcing.

 Add-On Development is an experienced Microsoft Gold Certified Partner and all relevant employees have one or more Microsoft certifications. Developing complex software tasks requires experienced employees and that is why Microsoft certifications plays a key role in our company strategy. We are endeavoring to achieve excellence in designing, developing and producing software for the Microsoft Platform that adds value to any business. Furthermore, we are result-driven and we strongly believe in good teamwork, a streamlined process and innovative- and employee development, which all are key contributor to the final outcome.

 As a trustworthy Partner we can help you add value to your business



Son Le Thanh

CEO of Add-On Development LLC




Asia:        Phone: (+84) 4 3514 0868

                  Add-On Development LLC
                  11th Floor, HEID Building
                  Lane 12 Lang Ha
                  Ba Dinh District
                  Hanoi, Vietnam

Europe:   Phone: (+45) 7944 7000

                  Add-On Development
                  Roms Hule 8
                  7100 Vejle, Denmark

Sale Office:


                  Phone: (+ 001)905 655 9262
                  Add-On Development
                  Toronto Canada