I build apps and run them myself.

Software architect, 20+ years · indie app developer · author

I build apps for iPhone, Android and Mac and the fast systems behind them, and I take every app all the way from design and build to operations. I hold the store accounts and signing keys of my own apps and ship every release myself. Behind that are more than 20 years building software that has to work, for banks, insurers, energy companies and public authorities: payments that clear in seconds, logins that only let the right people in, systems that run around the clock.

I am one of the two members of DigitalFreedom Global LLC (GitHub), the company behind my apps and The App Architect.

Your app runs. I take care of the rest. As The App Architect, I build, take over or rescue apps for companies and then run them, fully looked after. The accounts stay in your name, and the code sits in your repository from day one. theapparchitect.com →

20+ years of enterprise engineering:

• Microservice and event-driven architectures for banks and financial services
• Identity and access for regulated industries — roles, permissions, single sign-on, segregation of duties
• Instant payments — real-time payment processing, round-the-clock operation
• B2C and B2B apps in the App Store and Play Store, built, published and run myself
• CI/CD pipelines through to store delivery
• DevOps and operations — containers, Kubernetes, GitOps, monitoring
• Process automation — long-running business processes modelled in BPMN
• Technical leadership — founded and ran a software company: team, budget, client delivery

Photograph a wine bottle and get a verdict matched to your taste profile — it trains itself from every confirmed match. Quarkus microservice mesh, OpenAI Vision label reading, taste-vector matching. Flutter app, iOS & Android. sommelio.app · App Store

AI-powered reporting for construction and field service. A photo or voice memo on site is transcribed, geocoded, analyzed and compiled into a structured, validated report — 45 minutes of evening paperwork become 90 seconds on site. Quarkus microservice mesh on Kubernetes, Kafka, OpenAI Whisper & Vision, PostgreSQL. Flutter app, iOS & Android. dokuai.app · App Store

AI-generated word puzzle game. Every hour the backend creates new puzzles — GPT-4o picks the words, DALL·E 3 generates the visual clues, everything translated into 10 languages. Global leaderboard, streak system, offline play. Quarkus backend, PostgreSQL. Flutter app, iOS. snapshots-quiz.app · App Store

Native macOS app for Civo Cloud — full CRUD, Kubernetes deep integration (live metrics, pods, logs), S3 file browser, firewall management, 8 languages. Swift 6, SwiftUI, zero dependencies. civo-cloud-manager.app · App Store · Source

• Seaworthy (TestFlight beta) — iOS maintenance log for boat owners with on-device AI
• Bucketeer — native macOS object-storage browser for 9+ providers (S3, R2, B2, Wasabi, …) with Finder mount and cross-provider sync
• PaperlessIQ — AI-native document management for iOS with on-device classification
• Pourenzo — AI bartender: photograph the spirits you own, get cocktails you can actually make

More — including full case studies — on marcelrgberger.com and theapparchitect.com.

Solopreneur — The Art of Working Alone — an honest account of indie development, a business shutdown, and the return to solo work.

Native macOS app for Homebrew: background auto-updates, a full Brew GUI for browsing and installing casks, and an AppSnapshot engine for backing up and migrating app data across Macs. Swift.

Claude Code plugin: control Apple Pages from Claude — create, edit, format and export documents via /pages. 100+ templates, PDF/Word/EPUB export, tables, images. Python.

Claude Code plugin for full Apple Numbers control via AppleScript — create spreadsheets, manage data, format cells, export to PDF/Excel/CSV. Shell.

Claude Code plugin: control WhatsApp from Claude — read chats, send messages, search, auto-reply, export conversations, monitor in real time. macOS only. Python.

Claude Code plugin: control Xcode from Claude — build, test, run, clean, manage simulators, schemes, projects and devices. 30+ commands via AppleScript + xcodebuild + xcrun. Python.

Claude Code plugin for managing domains and DNS records via the INWX API. Python.

Ask a Pro — AI-powered document analysis with 85+ expert consultation roles for legal, medical, tax and professional advice. TypeScript.

Swift · SwiftUI · Flutter · Dart · Quarkus · Java · Kafka · PostgreSQL · Kubernetes · ArgoCD · Civo · GitHub Actions

• Client work — The App Architect
• Personal site — marcelrgberger.com
• LinkedIn · YouTube
• Email — hello@digitalfreedom.co.za