OAuth Jobs

I am looking for an experienced developer to build a middleware integration between QuickBooks Online and M-Pesa for automated supplier payments in Kenya. The system should connect to QuickBooks Online, retrieve approved/unpaid supplier bills and supplier payment details, and allow authorized users to initiate payments directly from the accounting workflow. The middleware should validate the supplier, bill amount, outstanding balance, payment details, and prevent duplicate payments before sending the payment request through the Safaricom M-Pesa B2C API. It should handle the M-Pesa asynchronous callback, capture the final transaction status, M-Pesa transaction ID, conversation ID, result code, and result description, and only mark the supplier bill as paid in QuickBooks after Safaricom conf...

I already have a working application in production, but it now needs fresh capabilities. My main goal is to extend its functionality by integrating selected third-party services (APIs, payment gateways, or SaaS tools that make sense for the platform). What I need from you: • Review the current codebase and architecture so the integrations slot in cleanly without breaking existing logic. • Design and implement the new API connections, including authentication flows, error handling, and rate-limit safeguards. • Expose the new functionality through clear service classes or endpoints that match our current coding style. • Provide concise setup documentation and a post-integration checklist so future updates stay manageable. The focus is on new features, but if...

I can not share the Java Script, I Would need someone to work with me over a Google Meet Or a Web Ex. I need a sharp set of eyes on the JavaScript embedded in one of my PingOne Advanced Identity Cloud customer journeys. The problem shows up only during the login process. Issue observed: • Authentication failures I will share the journey export and give you limited-time console access. Your job is to locate the fault in the script, patch it without breaking any existing steps, and demonstrate that a complete login now succeeds (standard username/password and any social connectors already configured). When you hand the work back, I expect: • The corrected JavaScript with clear inline comments • A brief change log explaining what was wrong and how you resolved it • E...

I need a clean, repeatable OAuth2 login flow that lets my application connect to both the Athena Healthcare FHIR sandbox and a live customer instance without changing code between environments. The login must operate strictly system-to-system—no individual user roles—yet obtain tokens that carry full read/write scope for any valid FHIR resource exposed by Athena. You will handle the entire authentication layer: client registration (sandbox and production), token retrieval, automatic refresh, and secure storage of secrets. I should be able to point the code at either endpoint, supply the relevant client credentials, and immediately receive a working access token that passes Athena’s FHIR authorization checks. Deliverables • Source code for the OAuth2 client (...

My existing “Log in with Facebook” flow has stopped working and users can no longer authenticate through their Facebook accounts. The button is already on the product and points to a registered Facebook App, but the hand-off to Facebook and return to my platform no longer completes successfully. I need a developer who knows the Facebook Login SDK, OAuth 2.0, and the Facebook App dashboard well enough to: • trace where the current flow breaks (front-end callback, redirect URI, app settings, or token exchange) • apply the required code or configuration fixes • confirm the solution in production and provide a brief summary of what was changed so I can keep it maintained If you have recently resolved similar issues after Facebook API or policy updates, that ex...