AI-powered app development · The Netherlands

Apps with AI that actually helps.

I build web and mobile apps with practical AI built in — assistants, smart search and automation that save your users real time.

The assistant on the right is live. Ask it anything about my work.

Ask my AI Live · Knows my services, projects and way of working.
Hi! I'm the FromEJ assistant. Ask me about EJ's work, what AI could do in your app, or how a project works.

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AI assistants, Smart search, Document understanding, Image recognition, Summaries, Forecasting, Workflow automation, Chat interfaces, Installable web apps, Integrations

Selected work

Products that people actually use

All projects

Research · AI

Excludr

A platform for systematic reviews and meta-analyses, with an AI co-reviewer that screens full texts against your inclusion and exclusion criteria — and shows its work, so your team keeps the final say.

  • AI assessment per criterion, with a confidence score and its reasoning
  • Dual screening: disagreements between reviewers surface automatically
  • PRISMA 2020 flow counts, Cohen’s kappa and AI-versus-human accuracy
  • AI screening
  • Systematic reviews
  • Web app
  • SaaS

Health · Open source

Period Tracker

A calm, honest and private period tracker. Instead of one made-up date, it forecasts the days your period will most likely start — and tells you how sure it is.

  • Probabilistic forecasting
  • Installable web app
  • Open source
  • Privacy-first

Developer tools · Open source

fastapi-fsp

A Python package that gives FastAPI + SQLModel APIs filtering, sorting and pagination out of the box. Add one dependency and every list endpoint speaks the same, predictable query language.

  • Python
  • FastAPI
  • SQLModel
  • Open source

Construction

Uniekbouw app

A custom app built for Uniekbouw to support their day-to-day work.

  • App development
  • Client project
AI Lab

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Describe your app idea and watch a first plan appear: where AI adds value, what the first version needs and how to build it.

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AI-generated first plan
Why FromEJ

Small studio, serious AI engineering

01

AI with a purpose

No AI for the sake of it. Every feature has to save your users time or give them something they could not do before.

02

Direct contact

You talk to the person writing the code. No account managers, no lost messages.

03

Built to last

Readable code, sensible tools and documentation, so you are never locked in.

How it works

From first call to launch

  1. 01

    Listen

    A short call to understand your goals, users and constraints — and where AI genuinely adds value, and where it does not.

  2. 02

    Plan

    A clear proposal with scope, timeline and a fixed price per phase. No surprises on the invoice.

  3. 03

    Build

    Short iterations with a working preview, so you see progress every week and can steer early.

  4. 04

    Launch & grow

    A careful launch, then measured improvements based on how people actually use what we built.

Have a project in mind?

Tell me what you are working on. You will get a reply within one working day.