Technical Fellow at Microsoft.
The language designer behind Turbo Pascal, Delphi, C#, and TypeScript.
Few people have shaped how developers write code as directly, or as repeatedly, as Anders Hejlsberg - from Turbo Pascal in the 1980s to TypeScript today.
Anders Hejlsberg is a Technical Fellow at Microsoft and one of the most influential programming language designers in the history of computing. His work spans four decades and four languages that millions of developers have written code in, and his fingerprints are on the type systems, compilers, and tooling that quietly define how a great deal of modern software gets built.
He first became known as the original author of Turbo Pascal, the famously fast compiler and IDE that put approachable, high-performance development in front of a generation of programmers. He went on to be the chief architect of Delphi, then joined Microsoft, where he served as the lead architect of C# - the language at the center of the .NET platform.
Most recently he has been the lead designer of TypeScript, which he first introduced at Microsoft in 2012 - bringing a gradual, structural type system to JavaScript and reshaping how the web is built at scale. The through-line across all of it is a designer obsessed with developer productivity, pragmatic type systems, and tooling that makes the right thing easy.
Languages Anders created or shaped - each one a default that millions of developers write code in.
The blazing-fast compiler and integrated environment that made serious programming accessible on early PCs - the work that first made his name.
The rapid application development environment built on Object Pascal that defined Windows desktop development for years.
The language at the heart of .NET - the syntax, type system, and language features that a generation of enterprise and game developers write in every day.
A gradual, structural type system layered onto JavaScript, first introduced in 2012 - now the default way teams build the web at scale.
The areas of the craft most associated with his name, and the themes that run through the work.
The work he is best known for, plus where he shares the thinking behind it.