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I will fix oauth2 token refresh loops and 401 API authentication
DIEKOLOLA
About this gig
Are your app's third party API connections crashing every hour due to expired access tokens? I build background OAuth2 token refresh handlers that resolve 401 Unauthorized errors permanently.
What I Fix & Build:
- Silent, automated access token refresh middleware
- Secure, encrypted refresh token storage logic
- Interceptor scripts that catch expired tokens and retry requests automatically
- Support for Google, QuickBooks, Zoom, Salesforce, and custom OAuth2 flows
How It Works:
- Send me a message with the API service giving you authentication issues.
- I inspect your grant types and build the background refresh engine.
- We simulate token expiration windows to verify continuous auto-authorization.
- You receive tested auth scripts, encryption configuration, and clear handoff guides.
Scope Boundaries: Covers OAuth2 token handshakes, refresh engines, and storage logic. Excludes custom single sign on (SSO) portal designs.
Keep your background sync processes running 24/7 without forcing re-logins. Message me with your target API to get started!
Get to know DIEKOLOLA
DIEKOLOLA
Stripe Webhooks LLM Rate Limits Shopify CRM Sync OAuth2 Auth
- FromNigeria
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English, German, Spanish, French, Italian
Senior Backend Engineer specializing in production grade API integrations. I build fail safe Stripe payment webhooks with idempotent processing, high concurrency OpenAI/LLM rate limit queues, real time Shopify to CRM sync engines, and automated OAuth2 token refresh systems. 6+ years delivering secure, tested, and documented solutions for US and international clients. Clean code, Postman test suites, and full handoff documentation included with every project.
Let's keep your systems running without dropped events or 401 errors.
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FAQ
Why does my API connection keep failing after 60 minutes?
Most OAuth2 providers expire access tokens after 1 hour. A background engine must use the refresh token to get a new one.
Is it safe to store refresh tokens in my database?
Yes, I implement AES encryption at rest so stored refresh tokens remain secure against leaks.
Which OAuth2 services do you work with?
Google Workspace, QuickBooks Online, Zoom, Xero, Hubspot, and any custom OAuth2 provider.
Will my users ever be forced to re-login manually?
Only if the refresh token itself is revoked by the user or reaches its maximum lifespan (e.g., 6 months).
Can you integrate this into an existing codebase?
Yes, I write modular middleware that plugs directly into existing HTTP client requests.
