GCP OAuth 2.0 & Billing Integration Expert for SaaS Onboarding

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GCP OAuth 2.0 & Billing Integration Expert for SaaS Onboarding MVP Project Length: Small (1-3 weeks) Desire onboarding setup basic UI idea that i have created using LOVABLE AI: https://preview--onboardiing-integration.lovable.app/ Remark: User has the permission to READ /Query the Big query project but not allow to edit the table. But User need to be able to integrate his own GA4 and GSC to the BQ project that I have created automated for them. So that my tool can query his data on my own project, but client pay for the bill. About Us: We requires secure and seamless integration with our clients' Google Cloud Platform (GCP) resources, specifically for billing linkage. Our MVP onboarding strategy relies on a specific OAuth 2.0 flow, and we're seeking a GCP expert to review this approach, validate its security and scalability, and potentially suggest more robust or efficient alternatives. The Challenge & Our Proposed Method (for review): Our current plan for client onboarding involves the following OAuth 2.0 process to link our saas project to a client's GCP billing account: SaaS Application Registration: Our SaaS application is registered as an OAuth 2.0 client within our own GCP project. Client Initiation: Clients are redirected to a Google OAuth consent screen when they wish to link their billing. Client Consent: Clients log in with their Google account and are presented with a request for specific permissions. Crucial Permission: We aim to request a scope related to cloud-billing.user or a custom role that includes the billing.projects.update scope on their billing account. Billing Account Selection: The client will select their specific Billing Account to grant this permission on. Token Exchange: Upon consent, Google redirects to our SaaS with an authorization code, which our backend exchanges for access and refresh tokens. SaaS Backend Action: Our backend uses these tokens to call the projects.updateBillingInfo API method (part of the Cloud Resource Manager API) to link our project to the client's billing account. What We're Looking For: We need a highly experienced GCP expert who can: Review Our Proposed OAuth 2.0 Flow: Critically evaluate the security implications of this approach for linking to client billing accounts. Assess its scalability and long-term viability for a growing SaaS product. Identify any potential pitfalls, limitations, or compliance considerations. Validate Required Scopes/Permissions: Confirm that cloud-billing.user or a custom role with billing.projects.update is the correct and most granular permission needed for this operation. Suggest if there are more precise or secure scopes available. Suggest Alternative/Better Onboarding Methods: Propose any superior or more efficient methods for achieving the same outcome (linking our project to a client's billing account) within the context of a SaaS application. This could involve different GCP APIs, organizational policies, or architectural patterns. Provide a brief justification for any alternative methods suggested, highlighting their benefits (e.g., enhanced security, simplified user experience, better scalability). (Optional, if an alternative method is chosen): Provide guidance or a high-level implementation plan for the chosen method. Proven experience designing and implementing secure integrations with GCP resources. Strong understanding of security best practices in cloud environments. Familiarity with SaaS architecture and onboarding challenges. Excellent communication skills, able to clearly explain complex technical concepts. At the end you have to deliver the method of setup guide as phrase 1 and a basic MVP to UI to proven it works as phrase 2

Keyword: Product Manager

Price: $200.0

Google Cloud Platform API