diff --git a/docs/architecture/arneis-swarch.md b/docs/architecture/arneis-swarch.md
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+# ARNEIS - Software Architecture
+
+This document details the planned Software Architecture that will be developed for the ARNEIS project.
+
+The software architecture of the ARNEIS project will be based on microservices running on the ARNEIS Kubernetes cluster.
+
+<!-- TODO: Add reference documents -->
+
+<!-- TODO: Add links to definitions and acronyms -->
+
+## Architecture of the ARNEIS cluster
+
+<!-- TODO: Add diagram -->
+
+The ARNEIS cluster is based on [Kubernetes](https://kubernetes.io/).
+
+For simplicity we chose to deploy the ARNEIS cluster using [K3s](https://k3s.io/).
+
+K3s (or “Lightweight Kubernetes”) is a simplified installation of the Kubernetes distribution built for IoT and Edge computing.
+
+K3s is an Open Source project started and maintained by Rancher.com.
+
+* Servers
+  - VM arneis-vm01
+  - (optional) 2x additional VM to provide High Availability?
+* Agents:
+  - Same hosts acting as main K3s server (primary agent)
+  - (optional) VM arneis-vm02 on the cloud
+  - RPI4 on each instance of ARNEIS edge system
+
+## Services deployed on the ARNEIS cluster
+
+* Terminate HTTPS (Traefik instance built into K3s)
+* Web server for ARNEIS documentation (replica of <https://arneis.readthedocs.io>)
+* Database for ARNEIS backend service (alternative: MongoDB instance at <https://www.mongodb.com/cloud/atlas/>)
+* ARNEIS backend service (Node.js + Koa - based on some public boilerplate)
+* ARNEIS customer frontend (static site developed in Next.js)
+* Service running on the RPI4 for controlling the OAK-D-Lite (Python3?)
+* Service running on the RPI4 for controlling the LEGO&reg; Technics Bluetooth Hub (Python3?)
+
+<!-- EOF -->
diff --git a/docs/index.rst b/docs/index.rst
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--- a/docs/index.rst
+++ b/docs/index.rst
@@ -48,6 +48,7 @@ Documentation
 
    architecture/arneis-spec
    architecture/arneis-sysarch
+   architecture/arneis-swarch
    
 .. toctree::
    :maxdepth: 2