crystalhansen

Migrating marketingPy from Docker Compose to AWS Lambda

How a 4-container Docker Compose stack (FastAPI + APScheduler + arq worker + Redis) became three purpose-built Lambda functions behind API Gateway, SQS, and EventBridge Scheduler — and the trick for delayed, self-cleaning email drip schedules.

21 min read   ·   July 08, 2026

2026   ·   aws   lambda   serverless-arch   python   fastapi   sqs   eventbridge   multi-tenant   ·   engineering   architecture

Bridging the Gap: Connecting React (Azure SWA) to a Secured .NET 8 API

A architectural breakdown of resolving Cross-Origin (CORS) cookie authentication constraints between Azure Static Web Apps and Azure App Service.

4 min read   ·   June 29, 2026

2026   ·   csharp   dotnet   azure   react   swa   architecture   cors   design-in-code   ·   engineering   devops-posts

Hardening .NET Minimal APIs: Shifting from Local Dev to Azure-backed RBAC

A practical deep-dive into configuring Role-Based Access Control (RBAC) in .NET 8 Minimal APIs and automating production cloud deployments via GitHub Actions.

5 min read   ·   June 28, 2026

2026   ·   csharp   dotnet   azure   rbac   security   github-actions   ·   engineering   devops-posts

Google Calendar API Bidirectionally with Full Calendar in a Multi-Tenant Booking Engines

4 min read   ·   May 25, 2026

2026   ·   google-api   oauth2   java   spring-boot   security   multi-tenant   ·   backend   architecture

How to restrict Multi-Tenant Bookings + Google Accounts Separation

5 min read   ·   May 24, 2026

2026   ·   google-api   oauth2   java   spring-boot   security   multi-tenant   ·   backend   architecture