Document:

Exhibit
10.15

 

PROMISSORY
NOTE [AND SECURITY AGREEMENT]

 

	$[●]	Effective
    Date: July 20, 2022

 

FOR
VALUE RECEIVED, and subject to the terms and conditions set forth herein, RUBICON TECHNOLOGIES, LLC, a Delaware limited liability
company (“Borrower”), hereby promises to pay to the order of ______________________ (“Lender”,
and together with the Borrower, the “Parties”), the principal amount of _________________________ U.S. Dollars ($________________)
(the “Loan”), together with all accrued interest thereon, as provided in this Promissory Note (this “Note”).

 

1.
Definitions. Capitalized terms used but not otherwise defined herein shall have the meanings set forth in this Section 1.

 

“Applicable
Rate” means the rate equal to ten percent (10.0%) per annum.

 

“Business
Day” means a day other than a Saturday, Sunday or other day on which commercial banks in Wilmington, Delaware are authorized
or required by law to close.

 

“Default
Rate” means the Applicable Rate plus five percent (5%) per annum.

 

“Loan
Fee” means a fee equal to fifteen percent (15%) of the principal amount of the Loan less all accrued interest, whether paid
or unpaid. The Loan Fee shall be due and payable on the Maturity Date pursuant to Section 2.1 and shall not accrue interest.

 

“Maturity
Date” means the earliest of: (a) the date on which the Merger Closing occurs; or (b) August 15, 2022.

 

“Merger
Closing” means consummation of the transactions contemplated by that certain Agreement and Plan of Merger, dated as of December
15, 2021, by and among Founder SPAC, a Cayman Islands exempted company (“Acquiror”), Ravenclaw Merger Sub LLC, a Delaware
limited liability company and wholly-owned subsidiary of Acquiror, Ravenclaw Merger Sub Corporation 2, a Delaware corporation and wholly-owned
subsidiary of the Acquiror, Ravenclaw Merger Sub Corporation 3, a Delaware corporation and wholly-owned subsidiary of the Acquiror, Boom
Clover Business Limited, a British Virgin Islands corporation, NZSF Frontier Investments Inc., a Delaware corporation, PLC Blocker A
LLC, a Delaware limited liability company, and the Borrower.

 

2.
Final Payment; Prepayment.

 

2.1
Final Payment. The entire unpaid principal amount of the Loan, all accrued and unpaid interest, the Loan Fee and all other amounts
payable under this Note shall be due and payable on the Maturity Date.

 

2.2
Prepayment. The Borrower may prepay the Loan in whole at any time without penalty or premium by paying the entire principal amount
of the Loan together with all accrued interest thereon to the date of prepayment and the Loan Fee.

 

     

     

    

 

3.
Interest.

 

3.1
Interest Rate. Except as otherwise provided herein, the outstanding principal amount of the Loan shall bear interest at the Applicable
Rate from the Effective Date set forth above until the Loan is paid in full, whether at maturity, upon acceleration, by prepayment or
otherwise.

 

3.2
Interest and Loan Fee Payment. All accrued interest and the Loan Fee shall be due and payable to the Lender on the Maturity Date.

 

3.3
Default Interest. If any amount payable hereunder is not paid when due (without regard to any applicable grace periods), whether
at stated maturity, by acceleration or otherwise, such overdue amount shall bear interest at the Default Rate from the date of such non-payment
until such amount is paid in full.

 

4.
Payment Mechanics. All payments of interest and principal shall be made in lawful money of the United States of America no later
than the close of business on the date on which such payment is due by wire transfer of immediately available funds to the Lender’s
account at a bank specified by the Lender in writing to the Borrower. All payments made hereunder shall be applied first to the payment
of accrued interest, second to the Loan Fee, and third to the payment of the principal amount of the Loan outstanding. Whenever any payment
to be made hereunder shall be due on a day that is not a Business Day, such payment shall be made on the next succeeding Business Day
and such extension will be taken into account in calculating the amount of interest payable under this Note.

 

5.
Remedies. Upon the occurrence and during the continuance of any event of default by Borrower, the Lender may at its option by
written notice to the Borrower declare the entire principal amount of this Note, together with all accrued interest thereon, the Loan
Fee and all other amounts payable hereunder, immediately due and payable.

 

6.
Security Interest. As security for the prompt and full satisfaction of the outstanding Loan of this Note, and all other sums due
under this Note including the Loan Fee, Borrower agrees that Lender shall have, and Borrower hereby grants to and creates in favor of
Lender, a first priority lien and security interest in all proceeds from the Merger Closing (together with all accessions, additions,
products and proceeds, the “Collateral”). Borrower agrees that it shall not, without the prior written consent of Lender,
grant or create or permit to attach or exist any mortgage, security interest, lien, judgment, or other encumbrance of or in the Collateral
or any portion thereof, other than the security interest provided for in this Note. Borrower agrees that it shall preserve and protect
Lender’s security interest in the Collateral. In addition to all rights and remedies given to Lender by this Note, Lender shall
have all the rights and remedies of a secured party under the Uniform Commercial Code of the State of Delaware (the “UCC”).
Borrower and Lender agree that this Note constitutes a security agreement under the UCC. Borrower agrees to provide from time to time
at the request of Lender such additional documents or instruments for Lender to perfect and maintain its security interest in the Collateral.
Borrower consents to Lender filing or causing to be filed or recorded, such instruments, documents or notices, including assignments,
financing statements and continuation statements as Lender may deem necessary or advisable from time to time in order to perfect, to
continue perfected and to preserve the priority of the lien and security interest in the Collateral granted pursuant to this Note.

 

7.
Non-Contravention. Neither the execution and the delivery by the Subscriber of this Agreement, nor the consummation by the Subscriber
of the transactions contemplated hereby, will (a) violate any law, rule, injunction, or judgment of any governmental agency or court
to which the Borrower is subject or any provision of its charter, bylaws, trust agreement, or other governing documents or (b) conflict
with, result in a breach of, or constitute a default under, any agreement, contract, lease, license, instrument, or other arrangement
to which the Borrower is a party or by which the Borrower is bound or to which any of its assets is subject; or (c) require any consent
or other action by any person under any agreement or other instrument to which any Borrower is a party or that is binding upon any Borrower
or any license, franchise, permit or other similar authorization held by any Borrower.

 

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8.
Miscellaneous.

 

8.1
Notices. All notices, requests or other communications required or permitted to be delivered hereunder shall be delivered in writing,
in each case to the address specified below or to such other address as such Party may from time to time specify in writing in compliance
with this Section 8.1. Notices (i) mailed by certified or registered mail or sent by hand or overnight courier service shall be deemed
to have been given when received and (ii) sent by e-mail shall be deemed received upon the sender’s receipt of an acknowledgment
from the intended recipient (such as by the “return receipt requested” function, as available, return e-mail or other written
acknowledgment).

 

	If
    to Borrower:	Rubicon
                                            Technologies, LLC

                                            100 West Main Street, Suite 610

    Lexington,
    Kentucky 40507

    Attention:
    William Meyer, General Counsel

    Email: bill.meyer@rubicon.com

	 	 
	If
                                            to Lender:
	_________________________

     

    _________________________

     

    _________________________

     

    Email:
    _________________________

    

 

8.2
Governing Law. This Note and any claim, controversy, dispute or cause of action (whether in contract, tort or otherwise) based
upon, arising out of or relating to this Note and the transactions contemplated hereby shall be governed by the laws of the State of
Delaware.

 

8.3
Counterparts; Integration. This Note may be executed in two or more counterparts, each of which shall be deemed an original, but
all of which together shall constitute one and the same Note. Counterparts may be delivered via facsimile, electronic mail (including
pdf or any electronic signature complying with U.S. federal ESIGN Act of 2000, e.g. www.docusign.com) or other transmission
method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes.
This Note constitutes the entire contract between the Parties with respect to the subject matter hereof and supersedes all previous agreements
and understandings, oral or written, with respect thereto.

 

8.4
Successors and Assigns. This Note may be assigned or transferred by the Lender or the Borrower only with the prior written consent
of the other party to this Note.

 

8.5
Headings. The headings of the various sections and subsections herein are for reference only and shall not define, modify, expand
or limit any of the terms or provisions hereof.

 

[Signatures
on the Following Page(s).]

 

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IN
WITNESS WHEREOF, Borrower and Lender have executed this Note effective as of the Effective Date.

 

	 	BORROWER:
	 	 	 
	 	RUBICON
    TECHNOLOGIES, LLC,
		a
    Delaware limited liability company
	 	 	 
	 	By:	 
	 	Name:	 
	 	Title:
    	 

 

	 	LENDER:
	 	 	 
	 	By:	 
	 	Name:	 
	 	Title:
    	 

 

[Signature
Page to Promissory Note – Rubicon Technologies, LLC]

 

    4Exhibit
10.16

 

SPONSOR
FORFEITURE AGREEMENT

 

This
SPONSOR FORFEITURE AGREEMENT (this “Agreement”) is made and entered into as of August 15, 2022, by and among Founder
SPAC, a Cayman Islands exempted company (“Founder”), Founder SPAC Sponsor LLC, a Delaware limited liability company
(“Sponsor”), and Rubicon Technologies, LLC, a Delaware limited liability company (“Rubicon,” and
together with Founder and Sponsor, each a “Party” and collectively, the “Parties”).

 

RECITALS

 

WHEREAS,
on December 15, 2021, Founder, Ravenclaw Merger Sub LLC, a Delaware limited liability company and wholly owned subsidiary of Founder,
Ravenclaw Merger Sub Corporation 1, a Delaware corporation and wholly owned subsidiary of Founder, Ravenclaw Merger Sub Corporation 2,
a Delaware corporation and wholly owned subsidiary of Founder, Ravenclaw Merger Sub Corporation 3, a Delaware corporation and wholly
owned subsidiary of Founder, Boom Clover Business Limited, a British Virgin Islands corporation, NZSF Frontier Investments Inc., a Delaware
corporation, and PLC Blocker A LLC, a Delaware limited liability company, entered into an agreement and plan of merger (the “Merger
Agreement”) with Rubicon with respect to a business combination between Founder and Rubicon (the “Business Combination”);

 

WHEREAS,
Sponsor holds Class B ordinary shares, par value $0.0001 per share, of Founder (“Founder Class B Shares”); and

 

WHEREAS,
in consideration for the various transactions and undertakings by the Parties contemplated by the Business Combination and the ancillary
agreements related thereto, Sponsor has agreed to forfeit 1,000,000 Founder Class B Shares (the “Forfeited Shares”)
immediately prior to the consummation of the Business Combination (the “Closing”).

 

AGREEMENT

 

NOW,
THEREFORE, in consideration of the foregoing and the mutual agreements contained herein, and intending to be legally bound hereby, the
Parties hereby agree as follows:

 

		1.	Forfeiture
                                            and Cancellation: Sponsor hereby agrees that, immediately prior to the Closing, Sponsor
                                            shall automatically and irrevocably surrender and forfeit to Founder, for no consideration
                                            and as a contribution of capital of Founder, the Forfeited Shares. Founder hereby agrees
                                            that it shall immediately cancel the Forfeited Shares for no consideration.

 

		2.	Entire
                                            Agreement: This Agreement constitutes the entire agreement and understanding of the Parties
                                            in respect of the subject matter hereof and supersedes all prior understandings, agreements,
                                            or representations by or among the Parties, written or oral, to the extent they relate in
                                            any way to the subject matter hereof or the transactions contemplated hereby. This Agreement
                                            may not be amended, modified or waived except by an instrument in writing, signed by each
                                            of the Parties.

 

		3.	Assignment:
                                            No Party shall assign this Agreement or any of its rights, interests or obligations hereunder
                                            without the prior written consent of the other Parties. Any purported assignment in violation
                                            of this paragraph shall be void and ineffectual and shall not operate to transfer or assign
                                            any interest or title to the purported assignee. This Agreement shall be binding on and inure
                                            to the benefit of the Parties and their respective permitted successors and assigns.

 

     

     

    

 

		4.	No
                                            Third-Party Beneficiaries: Nothing in this Agreement shall be construed to confer upon,
                                            or give to, any person or corporation other than the Parties any right, remedy or claim under
                                            or by reason of this Agreement or of any covenant, condition, stipulation, promise or agreement
                                            hereof. All covenants, conditions, stipulations, promises and agreements contained in this
                                            Agreement shall be for the sole and exclusive benefit of the Parties hereto and their successors,
                                            heirs, personal representatives and assigns and permitted transferees.

 

		5.	Counterparts:
                                            This Agreement may be executed in any number of original, electronic or facsimile counterparts
                                            and each of such counterparts shall for all purposes be deemed to be an original, and all
                                            such counterparts shall together constitute but one and the same instrument.

 

		6.	Severability:
                                            This Agreement shall be deemed severable, and the invalidity or unenforceability of any term
                                            or provision hereof shall not affect the validity or enforceability of this Agreement or
                                            of any other term or provision hereof. Furthermore, in lieu of any such invalid or unenforceable
                                            term or provision, the Parties intend that there shall be added as a part of this Agreement
                                            a provision as similar in terms to such invalid or unenforceable provision as may be possible
                                            and be valid and enforceable.

 

		7.	Specific
                                            Performance: The Parties agree that irreparable damage could occur in the event that
                                            any of the provisions of this Agreement were not performed in accordance with their specific
                                            terms or were otherwise breached. It is accordingly agreed that the Parties shall be entitled
                                            to an injunction or injunctions to prevent breaches of this Agreement and to specific enforcement
                                            of the terms and provisions of this Agreement, in addition to any other remedy to which any
                                            Party is entitled at law or in equity. In the event that any legal proceeding shall be brought
                                            in equity to enforce the provisions of this Agreement, no Party shall allege, and each Party
                                            hereby waives the defense, that there is an adequate remedy at law, and each Party agrees
                                            to waive any requirement for the securing or posting of any bond in connection therewith.

 

		8.	Governing
                                            Law; Jurisdiction: This Agreement, and all claims or causes of action based upon, arising
                                            out of, or related to this Agreement or the transactions contemplated hereby, shall be governed
                                            by and construed in accordance with the laws of the State of Delaware, without giving effect
                                            to any choice of law or conflict of law provision or rule (whether of the State of Delaware
                                            or any other jurisdiction) that would cause the application of the law of any jurisdiction
                                            other than the State of Delaware. Any action based upon, arising out of or related to this
                                            Agreement or the transactions contemplated hereby may be brought in federal and state courts
                                            located in the Chancery Court of the State of Delaware, and each of the Parties irrevocably
                                            and unconditionally submits to the exclusive jurisdiction of the Chancery Court of the State
                                            of Delaware (or, if the Chancery Court of the State of Delaware declines to accept jurisdiction,
                                            any state or federal court sitting in the Borough of Manhattan, State of New York, New York
                                            County), for the purposes of any proceeding, claim, demand, action or cause of action arising
                                            under this Agreement, and further irrevocably and unconditionally waives and agrees not to
                                            plead or claim in any such court that any such proceeding has been brought in an inconvenient
                                            forum, agrees that all claims in respect of the proceeding shall be heard and determined
                                            only in any such court, and agrees not to bring any proceeding arising out of or relating
                                            to this Agreement or the transactions contemplated hereby in any other court. Nothing herein
                                            contained shall be deemed to affect the right of any Party to serve process in any manner
                                            permitted by law or to commence legal proceedings or otherwise proceed against any other
                                            Party in any other jurisdiction, in each case, to enforce judgments obtained in any proceeding
                                            brought pursuant to this paragraph. The prevailing Party in any such proceeding (as determined
                                            by a court of competent jurisdiction) shall be entitled to be reimbursed by the non-prevailing
                                            Party for its reasonable expenses, including reasonable attorneys’ fees, incurred with
                                            respect to such action.

 

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		9.	Waiver
                                            of Jury Trial: THE PARTIES EACH HEREBY IRREVOCABLY WAIVE, TO THE FULLEST EXTENT PERMITTED
                                            BY LAW, ANY RIGHT TO TRIAL BY JURY OF ANY PROCEEDING, CLAIM, DEMAND, ACTION, OR CAUSE OF
                                            ACTION ARISING UNDER THIS AGREEMENT OR IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL
                                            TO THE DEALINGS OF THE PARTIES IN RESPECT OF THIS AGREEMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED
                                            HEREBY, IN EACH CASE, WHETHER NOW EXISTING OR HEREAFTER ARISING, AND WHETHER IN CONTRACT,
                                            TORT, EQUITY, OR OTHERWISE. THE PARTIES EACH HEREBY AGREE AND CONSENT THAT ANY SUCH PROCEEDING,
                                            CLAIM, DEMAND, ACTION OR CAUSE OF ACTION SHALL BE DECIDED BY COURT TRIAL WITHOUT A JURY AND
                                            THAT THE PARTIES MAY FILE AN ORIGINAL COUNTERPART OF A COPY OF THIS AGREEMENT WITH ANY COURT
                                            AS WRITTEN EVIDENCE OF THE CONSENT OF THE PARTIES HERETO TO THE WAIVER OF THEIR RIGHT TO
                                            TRIAL BY JURY. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (A) NO REPRESENTATIVE, AGENT OR
                                            ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY
                                            WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER, (B) EACH SUCH
                                            PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (C) EACH SUCH PARTY
                                            MAKES THIS WAIVER VOLUNTARILY AND (D) EACH SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS
                                            AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS AGREEMENT.

 

		10.	Notices:
                                            All notices and other communications among the Parties shall be in writing and shall be deemed
                                            to have been duly given (i) when delivered in person, (ii) when delivered after posting in
                                            the United States mail having been sent registered or certified mail return receipt requested,
                                            postage prepaid, (iii) when delivered by FedEx or other nationally recognized overnight delivery
                                            service, or (iv) when delivered by email (in each case in this clause (iv), solely if receipt
                                            is confirmed, but excluding any automated reply, such as an out-of-office notification),
                                            addressed as follows:

 

	 	(a) If to Founder
    or Sponsor, to:
	 	 	 	 
	 	 	Founder SPAC
	 	 	11752 Lake Potomac Drive
	 	 	Potomac, Maryland 20854
	 	 	Attention:	 Osman Ahmed
	 	 	Email: 	osman@founderspac.com
	 	 	 	 
	 	with copies (which shall not constitute
    notice) to:
	 	 	 	 
	 	 	Winston & Strawn LLP
	 	 	800 Capitol St Suite 2400
	 	 	Houston, TX 77002
	 	 	Attention:	Michael Blankenship
	 	 	 	James R. Brown
	 	 	 	Louis B. Savage
	 	 	Email:	mblankenship@winston.com
	 	 	 	jrbrown@winston.com
	 	 	 	lsavage@winston.com

 

    3

     

    

 

	 	(b) If to
    Rubicon, to:
	 	 	 	 
	 	 	Rubicon Technologies,
    LLC
	 	 	950 E. Paces Ferry
    Road
	 	 	Suite 1900
	 	 	Atlanta, GA 30326
	 	 	Attention:	William Meyer, General Counsel
	 	 	Email:	bill.meyer@rubicon.com
	 	 	 	 
	 	with copies (which
    shall not constitute notice) to:
	 	 	 	 
	 	 	Gibson, Dunn &
    Crutcher LLP
	 	 	200 Park Ave.
	 	 	New York, NY 10166 
	 	 	Attention:	Saee Muzumdar
	 	 	 	Evan D’Amico
	 	 	Email:	SMuzumdar@gibsondunn.com
	 	 	 	EDAmico@gibsondunn.com

 

		11.	Further
                                            Assurances: Each of the Parties agrees to execute and deliver hereafter any further document,
                                            agreement or instrument of assignment, transfer or conveyance as may be necessary or desirable
                                            to effectuate the purposes hereof and as may be reasonably requested in writing by another
                                            party hereto.

 

[Signature
Page Follows]

 

    4

     

    

 

IN
WITNESS WHEREOF, the parties have hereunto caused this Agreement to be duly executed as of the date first written above.

 

	 	FOUNDER SPAC
	 	 	 
	 	By:	/s/
    Osman Ahmed
	 	Name:	Osman Ahmed
	 	Title:	CEO
	 	 	 
	 	FOUNDER SPAC
    SPONSOR LLC
	 	 	 
	 	By:	/s/
    Manpreet Singh
	 	Name:	Manpreet Singh
	 	Title:	Managing Member
	 	 	 
	 	RUBICON TECHNOLOGIES,
    LLC
	 	 	 
	 	By:	/s/
    Nathaniel R. Morris
	 	Name:	Nathaniel Morris
	 	Title:	Chairman & CEO

 

[Signature
Page to Sponsor Forfeiture Agreement]

 

    5

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