the payment and data integration services of instadeq[1] are implemented in clojure (component, immutant, bidi, cheshire).
also the data integration backend (same stack as above), and it's frontend and an admin interface for users, groups and permissions for event fabric[2] (clojurescript, om.next, garden).
just to be clear, backend and frontend of both product aren't clojure/clojurescript.