EXHIBIT 31.1302 CERTIFICATIONSI, Robert H. Youngjohns, certify that: 1. I have reviewed this quarterly report of Callidus Software Inc. on Form 10-Q;  2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to statea material fact necessary to make the statements made, in light of the circumstances under which suchstatements were made, not misleading with respect to the period covered by this report;  3. Based on my knowledge, the financial statements, and other financial information included in this report,fairly present in all material respects the financial condition, results of operations and cash flows of theregistrant as of, and for, the periods presented in this report;  4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant andhave: (a) Designed such disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensure thatmaterial information relating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities,particularly during the period in which this report is being prepared;  (b) Paragraph omitted pursuant to SEC Release Nos. 33-8238 and 34-47986;  (c) Evaluated the effectiveness of the registrant’s disclosure controls andprocedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the end ofthe period covered by this report based on such evaluation; and  (d) Disclosed in this report any change in the registrant’s internal controlover financial reporting that occurred during the registrant’s most recentfiscal quarter (the registrant’s fourth fiscal quarter in the case of theannual report) that has materially affected, or is reasonably likely tomaterially affect, the registrant’s internal control over financialreporting; and 5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation ofinternal control over financial reporting, to the registrant’s auditors and the audit committee of theregistrant’s board of directors (or persons performing the equivalent functions): (a) All significant deficiencies and material weaknesses in the design oroperation of internal control over financial reporting which are reasonablylikely to adversely affect the registrant’s ability to record, process,summarize and report financial information; and  (b) Any fraud, whether or not material, that involves management or otheremployees who have a significant role in the registrant’s internal controlover financial reporting.Date: May 10, 2007         /s/ ROBERT H. YOUNGJOHNS   *Robert H. Youngjohns*   *President and Chief Executive Officer*   

 
I, Ronald J. Fior, certify that: 1. I have reviewed this quarterly report of Callidus Software Inc. on Form 10-Q;  2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state amaterial fact necessary to make the statements made, in light of the circumstances under which such statements weremade, not misleading with respect to the period covered by this report;  3. Based on my knowledge, the financial statements, and other financial information included in this report, fairlypresent in all material respects the financial condition, results of operations and cash flows of the registrant asof, and for, the periods presented in this report;  4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controlsand procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have: (a) Designed such disclosure controls and procedures, or caused such disclosure controlsand procedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidated subsidiaries, ismade known to us by others within those entities, particularly during the period inwhich this report is being prepared;  (b) Paragraph omitted pursuant to SEC Release Nos. 33-8238 and 34-47986;  (c) Evaluated the effectiveness of the registrant’s disclosure controls and proceduresand presented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by thisreport based on such evaluation; and  (d) Disclosed in this report any change in the registrant’s internal control overfinancial reporting that occurred during the registrant’s most recent fiscal quarter(the registrant’s fourth fiscal quarter in the case of the annual report) that hasmaterially affected, or is reasonably likely to materially affect, the registrant’sinternal control over financial reporting; and 5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board ofdirectors (or persons performing the equivalent functions): (a) All significant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely to adverselyaffect the registrant’s ability to record, process, summarize and report financialinformation; and  (b) Any fraud, whether or not material, that involves management or other employees whohave a significant role in the registrant’s internal control over financialreporting.Date: May 10, 2007                                                                                                  /s/ RONALD J. FIOR   *Ronald J. Fior*   *Chief Financial Officer,*