MisterJDennes
General descriptionI build software systems that hold together. I also keep a workshop for the ideas that do not fit in a ticket.
- Designation
- MisterJ / "Jay"
- Function
- Software developer, systems builder
- Region
- Europe
- Environment
- Self-hosted · Linux + Windows
01Pinout
Tools in context.
Six groups, wired to one core.
- BuildC#/.NET, Delphi, TypeScript/React, Python
- DataRelational SQL, embedded full-text search, caches, message queues
- SystemsLinux and Windows, containers, x64 and ARM builds
- InfrastructureSelf-hosted CI, source hosting, SSO, VPN, reverse proxies
- AIAgent tooling, local model serving, embeddings, LLM gateways
- ExperimentsGame backends, simulation, docs generated from game data
02Status register
On the bench.
What is on the bench right now. Public projects carry their name; the private ones are only described.
REG 02.1
Notary office softwareThe day job. A long-lived Delphi desktop application for notary offices, with newer parts in C# and .NET.
Live- Delphi
- C#
- Desktop
REG 02.2
Transport Fever 3 modding docsModding documentation for Transport Fever 3 in English and German. The API reference is generated from the game's own definitions and scripts, and coding agents get a plain-text reference and a skill package to download.
Live- Docs
- Modding
- Agents
REG 02.3
Context runtime for coding agentsA local tool server that keeps large command output out of a coding agent's context. Agents search code and docs through it and share one memory. Native on Linux and Windows.
In progress- Agents
- Search
- Embeddings
REG 02.4
Multi-agent workbenchSeveral coding agents working side by side in their own worktrees, each with a role, coordinated through a shared board and a review step before anything merges.
Running- Agents
- Orchestration
REG 02.5
Self-hosted AI gatewayOne OpenAI-compatible API in front of locally served language models, with per-tenant usage metering. Request content is never stored.
In progress- LLM
- Multi-tenant
- Privacy
REG 02.6
Persistent browser gameAn online world where the server decides every outcome. A separate studio app is for writing and publishing the game content.
In progress- Game
- Realtime
- Web
REG 02.7
Release and update feedA small service that publishes releases with checksums and switches the latest version in one step, so desktop tools can update themselves.
Live- Delivery
- Desktop
REG 02.8
Homelab as codeSource hosting, CI with Linux and Windows build agents, single sign-on, mail, a mesh VPN and game hosting. One pinned container stack per app, all of it in git.
Running- Infrastructure
- CI/CD
- Self-hosted
03Application notes
Curious by default.
I'm Dennes Neumann, better known online as MisterJ or Jay. My day job is desktop software for notary offices, in Delphi and C#. After hours I build tooling for coding agents and game backends, and I run the servers they live on.
I want to know how a system behaves once real users and real data reach it. Most of what I build runs on my own servers before anyone else sees it, and I distrust answers that sound too simple.