Statsig CEO Vijaye Raji at the company’s Bellevue headquarters. (GeekWire File Photo / Todd Bishop) We have a new unicorn. Four years after it was founded by a former Facebook engineering leader, Statsig has raised $100 million at a $1.1 billion valuation, accelerating its efforts to unify product development tools as AI reshapes how software behaves and gets built. Statsig, based in Bellevue, provides tools that help product teams test new features, measure their impact, and decide what to roll...