Erik Meijer (born 18 April 1963, Curaçao) is a Dutch computer scientist and entrepreneur. From 2000 to early 2013 he was a software architect for Microsoft where he headed the Cloud Programmability Team.  He then founded Applied Duality Inc. in 2013. Before that, he was an associate professor at Utrecht University. He received his Ph.D from Nijmegen University in 1992.
Meijer's research has included the areas of functional programming (particularly Haskell) compiler implementation, parsing, programming language design, XML, and foreign function interfaces.
His work at Microsoft included C#, Visual Basic, LINQ, Volta, and the Reactive programming framework (Reactive Extensions) for .NET. He has been involved in over 300 software patent applications of which 101 have been granted.
In 2009, he was the recipient of the Microsoft Outstanding Technical Leadership Award and in 2007 the Outstanding Technical Achievement Award as a member of the C# team.
Meijer lived in the Netherlands Antilles until the age 14 when his father retired from his current job and the family moved back to the Netherlands.
In 2011 Erik Meijer was appointed part-time professor of Cloud Programming within the Software Engineering Research Group at Delft University of Technology. He is also member of the ACM Queue Editorial Board.