---
author: Jan Brennenstuhl
canonical_url: https://www.janbrennenstuhl.eu/now/
description: What Jan Brennenstuhl is working on right now.
id: jb-now
kind: page
license:
name: CC BY 4.0
scope: Original text; credited third-party media retain their own rights.
url: https://creativecommons.org/licenses/by/4.0/
markdown_url: https://www.janbrennenstuhl.eu/now/index.md
modified: '2026-10-13T00:00:00+02:00'
published: '2026-10-13T00:00:00+02:00'
review_basis: ''
review_status: not-reviewed
reviewed: ''
series: ''
status: published
title: Now
topics: []
---
# Now
What Jan Brennenstuhl is working on right now.
I work in Berlin as a principal engineer, focused on application security and on making agentic engineering more secure and efficient.
## Building
Most of my time goes into the [Agentic Identity Broker](https://www.janbrennenstuhl.eu/projects/agentic-identity-broker/): delegation and consent infrastructure, so that an agent can act for a person without holding that person's credentials. The [retrospective](https://www.janbrennenstuhl.eu/agentic-identity-broker/) covers what 10 months of building it with coding agents taught me.
## Writing
I am turning the knowledge base into a [field guide](https://www.janbrennenstuhl.eu/knowledge-base/): short, citable answers with the evidence behind them, starting with password reuse and the new [agent identity](https://www.janbrennenstuhl.eu/knowledge-base/agent-identity/) area.
## Speaking
Talk and lecture material lives on the [speaking page](https://www.janbrennenstuhl.eu/talks/). If you organize an event on application security, identity or agents, the [about page](https://www.janbrennenstuhl.eu/about/) has a short bio.
This page follows the [now page](https://nownownow.com/about) idea. Last updated 13 October 2026.
---
Cite as: Jan Brennenstuhl. "Now." Brennenstuhl on Security, 13 October 2026. https://www.janbrennenstuhl.eu/now/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) for the original text; credited third-party media keep their own rights.