Tanja Säily is a Postdoctoral Researcher in the Department of Modern Languages at the University of Helsinki. After defending her PhD dissertation on variation and change in English derivational productivity in 2014, she gained a postdoc position for 2015-17 in the Academy of Finland funded project Reassessing language change: the challenge of real time, where she continues her work on productivity in addition to participating in the compilation of a new online resource, the Language Change Database. She is also collaborating with computer scientists to develop corpus-­linguistic tools and methods for historical sociolinguistics in the STRATAS project, funded by the Academy of Finland DIGIHUM programme. She is a co­-compiler of the Corpora of Early English Correspondence.