Software engineering · Florida, USA · Embarcadero MVP
Software that runs your business — built, verified, shipped.
I'm Dr. Holger Flick. I build the systems companies run on: warehouse and shop platforms, field apps that work offline, and web applications that replace aging desktop software — with Next.js, React, TypeScript, and PostgreSQL. A Master's in Computer Science, a PhD in Mechanical Engineering, and 30+ years of Delphi as an Embarcadero MVP mean I can read the old code as well as write the new. I'll help you ship it — and show you what I shipped before.
01 — Latest news
Fresh from the blog.
Latest
Build, Don't Buy: Custom Software in 12 Days Instead of Another SaaS Seat
A realtor's household ran on spreadsheets, paper and a handful of subscriptions -- so I built her a system of her own in twelve days, with AI document filing, passkeys, an encrypted vault and apps for iPhone, iPad, Apple TV, Mac and Chrome, and here is what that means for your Delphi application and your next "buy or build" decision.
- Custom Software
- Modernization
- Next.js
- SwiftUI
- AI
Read article
Independent & ad-free
The articles and tutorials here are free to read — funded by readers, not ads. If they've helped you, there's a way to give back.
02 — What I do
Six services, each with proof attached.
/01
Delphi to web migration
Legacy VCL and multi-tier Delphi apps — Delphi 7 and up, Firebird, InterBase, MS SQL — rebuilt on Next.js, React, and TypeScript with the data moved over.
Proof: Delphi 7 + Firebird 1.5 to Next.js
/02
Custom business systems
Warehouse management, B2B web shops, delivery apps, reporting pipelines — built from scratch, wired into the ERP you already run, and shipped to production.
Proof: Warehouse management system
/03
AI-assisted engineering, verified
Spec-driven development with Claude Code, local LLMs embedded in Delphi and web apps with no data leaving the building, and independent review of everything the model wrote.
Proof: Spec coding a native Delphi tool in one afternoon
/04
Delphi consulting and code rescue
Architecture reviews, FireDAC and database modernization, REST and JSON APIs, Docker and PostgreSQL for Delphi shops — three decades of Delphi on call.
Proof: PostgreSQL and FireDAC from scratch
/05
Training and courses
Live training for teams, video courses, and five books on Delphi, multi-tier architecture, and the road from desktop to web — in English and German.
Proof: Books and courses
/06
Long-term partnership
An expert on retainer for teams that need one: US-based, Eastern time, fluent German for DACH customers, and the same person on the phone every time.
Proof: How I work and where
03 — Selected work
Built, shipped, and running.
Anonymized on purpose — no customer names, no product details a competitor could use. The engineering is described exactly.
In production/01European manufacturer, industrial products
A warehouse management system, built from scratch
Stock, picking, packing, receiving, and reporting for a manufacturer's warehouse, integrated with their cloud ERP and running every day in production.
Launching/02Same manufacturer as the warehouse system
A B2B web shop that never holds its own stock
A business-to-business shop whose catalog is public, whose prices appear after staff approval, and whose availability comes live from the warehouse on every page view.
In production/03US home-delivery operation, existing Delphi backend
A delivery app for drivers that works without a signal
An offline-first mobile web app for drivers on the road, talking to the customer's existing Delphi REST backend, plus a live driver map for the office wall.
In production/04US public agency, property and inspection program
A twenty-year-old Delphi 7 application, on the web in a week
Delphi 7 and Firebird 1.5 rebuilt as a Next.js application with Prisma and PostgreSQL, the production data migrated, and an offline inspection app for the field.
04 — Built on what I sell
This site is the demo.
The page you are reading replaced a PHP site with a custom Next.js application and its own admin CMS. Everything I sell is running under your cursor.
- Blog and tutorials in Postgres with an admin markdown editor, drafts, scheduled publishing, and one-click translations into German, Spanish, and Portuguese
- Photo galleries with server-side uploads to S3, perceptual duplicate detection, EXIF display, and automatic re-encoding of videos so they play on every browser
- Server-side PDF export for every article, full-text search, RSS, and social preview images rendered on the fly
- Passkey login for the admin area, first-party click analytics with self-hosted geo lookup, no third-party trackers
- A paywalled video course platform (in preparation, not live yet), a private offline Delphi documentation library (for my personal use only, due to licensing rights), and a GraphQL API
05 — Explore
Articles, courses, books, and more.
06 — Say hello
Have a project in mind? Let's build it.
Available for consulting, migration work, and long-term partnerships — in English and German.