Weld SE will does not work inside an OSGI bundle. If you try to start WeldSE from within a OSGI bundle, you will get.

Error loading Weld bootstrap, check that Weld is on the classpath
at org.jboss.weld.environment.se.Weld.<init>(Weld.java:59)

Looking at the cause, it seems org.jboss.weld.environment.se.util.Reflections only works with Thread context classloaders and plain Class.forname both of which are NO-NO in osgi.