Tech Stack Diagramming Excalidraw Mermaid Software Architecture Modular Monolith Programming Languages Go JavaScript Python (for data engineering) Scripting Bash Front-End SvelteKit htmx Reverse Proxy Caddy Traefik Web Server Caddy Data Storage Relational PostgreSQL SQLite Key-Value NATS Redis Object NATS MinIO Time Series TimescaleDB Analytics DuckDB Data Engineering Redpanda Connect DuckDB Evidence dbt Messaging NATS Centrifugo Workflows and Durable Execution Temporal Identity and Access Management (IAM) ZITADEL Keycloak Policy Engine Open Policy Agent (OPA) Secrets Management SOPS Observability Grafana Stack Testing API Testing Postman + Newman Load Testing k6