Tobias Kaetker
Tobias Kaetker

Builds with AI.

Berlin-based. Works in B2B marketing during the day. Builds several AI projects alongside that work. Some live, some demos, some still in progress.

See the projects Professional CV

Portfolio is the best place to start if you want the project view.

TobAIs

Ask TobAIs.

Ask me anything about Tobias. I'm his personal AI assistant.

How Tobias works with AI

Uses a small agent stack.

Claude Code, Codex and Hermes work day and night.

Shared persistent memory

One memory layer across Claude Code, Codex and Hermes. Shared through Obsidian, fast, structured, survives sessions and agents without hitting token limits. Each agent can pick up where another left off.

Honesty over agreement

Agents are configured to push back, flag weak assumptions and report partial failure — instead of defaulting to "sounds good." A task-completion protocol enforces honest status over polite confirmation.

High-agency agents

Agents act and decide inside defined boundaries — scoped permissions, reviewable diffs, pre-commit gates. Tobias knows when to let them run and when to step in.

Hardened multi-agent setup

Prompt-injection scanners on commits, isolated VPS for the autonomous agent, separate memory scopes. Shared repos are treated as untrusted input until verified.

Staying current is part of the job — Instagram, GitHub, newsletters, every serious new release gets tried within days.

Built to ship — not just to prompt.
Work with Tobias

Three ways this can go.

If one of these fits, use the button. Each one opens a short email draft with a ready-to-send template — fill in three lines and your mail client handles the rest.

01

Hire or collaborate

Freelance or full-time AI-leaning marketing and product work. Comfortable across paid, content, automation and internal tools.

02

Back an early project

A few AI projects are at the stage where small amounts already move things forward. Honest, early, not a pitch deck.

03

Build something together

Open to a co-founder if the fit is real. Ideally someone who ships, is honest, and doesn't need a kickoff meeting to start.

01

Professional

Background, current work, how the day job and the side projects fit together.

Open Professional
02

Portfolio

Current projects with links. Some live, some demos. A few still too rough to show.

Open Portfolio
03

CV

Experience, education, skills, direct contact — the structured version.

Open CV
04

Private

Personal context, collaboration style, what Tobias wants next. Password-gated.

Open Private
Right now

What Tobias is currently working on.

Mostly AI projects. BallR, meOS and DJ Dopamine now sit under the tobiki.de domain family, with more project subdomains coming as they ship.

AI builder B2B marketing Product + growth M.Sc. Economics DE + EN
Current projects

Public ones. More are in progress.

  • BallR — football pickup website, with the app on app.ballr.tobiki.de
  • DJ Dopamine — AI music lab, live
  • meOS — product site, web app and local edition

Full list on the portfolio page.