EXHIBIT 1 Joint Filing Agreement The undersigned hereby agree that the statement on Schedule 13D filed by the undersigned with respect to the Common Stock of Evolve Software, Inc. is, and any amendment thereto signed by each of the undersigned shall...

                                                                      EXHIBIT 1

                             Joint Filing Agreement

The undersigned hereby agree that the statement on Schedule 13D filed by the
undersigned with respect to the Common Stock of Evolve Software, Inc. is, and
any amendment thereto signed by each of the undersigned shall be, filed on
behalf of each undersigned pursuant to and in accordance with the provisions of
Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.


Dated: October 1, 2001                            WARBURG PINCUS PRIVATE
                                                  EQUITY VII, L.P.
                                                  By: Warburg, Xxxxxx & Co.,
                                                               General Partner

                                                  By: /s/ Xxxxx Xxxxxxx
                                                  ------------------------------
                                                  Name: Xxxxx Xxxxxxx
                                                  Title: Attorney in Fact

Dated: October 1, 2001                            WARBURG, XXXXXX & CO.
                                                  By: /s/ Xxxxx Xxxxxxx
                                                  ------------------------------
                                                  Name: Xxxxx Xxxxxxx
                                                  Title: Attorney in Fact

Dated: October 1, 2001                            WARBURG PINCUS LLC
                                                  By: /s/ Xxxxx Xxxxxxx
                                                  ------------------------------
                                                  Name: Xxxxx Xxxxxxx
                                                  Title: Vice President