Full stack platforms
End-to-end development of data-intensive web applications with React, TypeScript, Symfony and NodeJS.
senior full-stack, AI consultant, coding since '84
I build data-intensive platforms and help you work with AI.
Senior Full Stack Developer & AI Consultant with 30+ years of hands-on experience. I help you figure out where AI actually pays off, and build what belongs in production, not just in demos.
info@tim-schipper.nl — zsh
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recently measured
- 803Ledgerly repos created in 2026, up from 10
Why AI gives everyone the same name: 505 runs across 19 models
Ask a model to name your project and you get the name it gives everyone with a similar brief. I gave 19 models ten naming briefs, from a game to a SaaS to a fantasy heroine, 505 runs in all, and counted how often they agree and how many of their favourites are already taken.
- 0/7write attempts that got past the role
Read-only database access for Claude: the role, the flag and Azure without passwords
Every SQL MCP server promises a read-only mode, and fourteen of them turned out to have a way around it. I ran the bypasses against a read-only role on Postgres and SQL Server, then looked at what passwordless Azure sign-in does to the same setup.
- 0.00%mutation score on vitest 5
Stryker and Vitest 5: why every mutant suddenly survives
After upgrading to Vitest 5, StrykerJS reported every covered mutant as survived, with a green dry run and no error. How to tell a broken runner from a weak test suite in the report itself, what 10.1 fixed, and why the version to install is 10.1.1.
tools I use myself, open source on aranea-development.nl
- TimestampsTimestamps, turn durations, and timing reports for Claude Code and Codex.
- ArgosSee every query your agent runs, with its full result, and keep it read-only where it counts.
- KnossosMap dependencies, inspect change impact and keep architecture knowledge beside your work.
- NekyiaSearch local session history across agent clients, then resume a session or start with a handover.
core strengths
What I do
API architecture
Design and construction of advanced REST APIs, WebSocket systems and enterprise-level external integrations.
AI consultancy
I help you figure out where AI genuinely pays off, and build the integrations, agents and pipelines that hold up in production.
about me
I got my first computer, an MSX, on my 10th birthday in 1984 and never stopped building. Over four decades I've gone from BASIC listings and BBS systems to leading data-intensive production platforms. I care about code that lasts, teams that ship, and understanding what you build instead of blindly generating it.
30+
Years professional experience
start here
All articlesWhy you should never ship code you don't understand
If you read one thing here, read this. The whole argument in one place: judgment is the work, generation is the easy part.
The MCP supply chain is the new npm, and it is already poisoned
The security half: an MCP server is a dependency that runs with your agent's permissions, and the supply chain behind it is already being poisoned.
Working with an agent, properly
The practical half: how I run an agent from first prompt to merged commit. Spec, context, enforcement and review, without losing the thread.
or start with a topic guide: