Exhibit 31.1

                                  CERTIFICATION

I, M. Dale Skeen, Chief Executive Officer and Chief Technology Officer, certify
that:

      (1)   I have reviewed this quarterly report on Form 10-Q/A of Vitria
            Technology, Inc.; and

      (2)   Based on my knowledge, this report does not contain any untrue
            statement of a material fact or omit to state a material fact
            necessary to make the statements made, in light of the circumstances
            under which such statements were made, not misleading with respect
            to the period covered by this report.



                                     By:  /s/ M. DALE SKEEN, PH.D.
                                          ------------------------------------
Date:  August 17, 2004                    M. Dale Skeen, Ph.D.
                                          Chief Executive Officer and Chief
                                          Technology Officer