diff --git a/contributions/demo/week5/diogotc-tmbpe/README.md b/contributions/demo/week5/diogotc-tmbpe/README.md
new file mode 100644
index 0000000000..70981f7667
--- /dev/null
+++ b/contributions/demo/week5/diogotc-tmbpe/README.md
@@ -0,0 +1,42 @@
+# Assignment Proposal
+
+## Title
+
+Declarative and reproducible deployments with NixOS
+
+## Names and KTH ID
+
+- Diogo Correia (diogotc@kth.se)
+- Tomás Esteves (tmbpe@kth.se)
+
+## Deadline
+
+Week 5
+
+## Category
+
+Demo
+
+## Description
+
+NixOS is an immutable Linux distribution that aims to be reproducible
+and declarative thanks to the underlying Nix functional language.
+Through the Nix language, it is possible to declare all aspects of a system,
+ensuring that the result will always be the same, no matter when or where
+the system configuration is deployed.
+Other properties of NixOS include easy rollbacks, dependency pinning for each package,
+specialisations, cleanup of previous configurations, and more.
+
+In this demo, we will show the audience how to deploy a fully-configured NixOS
+system in seconds, using tools like nixos-anywhere to bootstrap the installation
+and disko to declare disk partitions.
+
+**Relevance**
+
+NixOS (and the associated Nix language and Nixpkgs package repository) are the pinnacle
+of Infrastructure as Code, allowing for a system to be completely defined through
+Nix code.
+This makes similar deployments extremely easy and scalable, as Nix code can be shared
+between many hosts.
+Additionally, updates to packages and configuration can be performed in bulk or in a
+CI/CD system and copied to the resulting systems.