GUSTAV LÜBKER

Software Developer

I'm a software developer and founder of AppVerge, a studio creating refined Mac and iOS apps including DockFix and SnappyNotes. Beyond my apps, I’ve worked on a wide range of software projects.

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PROJECTS

SnappyNotes
SnappyNotes
01

SnappyNotes

2025-2026

SnappyNotes is a simple, yet modern notepad always accessible on the side of your Mac screen through a gesture or keyboard shortcut. Take notes in an instant without ever leaving the app you're working in. Everything syncs automatically to your iPhone and iPad, so your notes are always with you. It’s fast, seamless, and built to stay out of your way.

Personal macOS + iOS App
SwiftUI
Radial
Radial
02

Radial

2025-2026

Radial is a modern launcher for macOS that provides instant actions to open apps, insert text, trigger workflows, and more with a single gesture. Over just a few months, it has quickly gained popularity and received positive reviews.

Personal macOS App
SwiftUI
4Power App
4Power App
03

4Power App

2025-2026

When 4Power needed a more native, polished mobile experience, I designed and built an iOS app from the ground up using SwiftUI. The app follows Apple's Human Interface Guidelines with a clean, modern UI, and gives users full control over all 4Power devices. It features seamless Bluetooth onboarding, over-the-air firmware updates, scheduling, and push notifications.

Commercial Mobile App
SwiftUI
Handheld Game Console
Handheld Game Console
04

Handheld Game Console

2025

A handheld game console I designed and built from scratch, running on a Radxa Rock 5C with a custom software interface written in Flutter. The hardware, PCB, and 3D printed casing were all made personally, alongside several built-in games.

Personal Embedded Hardware
C++CPythonFlutter
DockFix
DockFix
05

DockFix

2024-2026

My second macOS app, DockFix, is a dock replacement for macOS. It offers tons of customizability and additional features beyond the native macOS dock, allowing users to personalize their system further and take advantage of its enhanced capabilities. Since its launch, DockFix has gained immense popularity with hundreds of devoted users.

Personal macOS App
SwiftUI
iPhone and Android App for ABB's Talent Program
iPhone and Android App for ABB's Talent Program
06

iPhone and Android App for ABB's Talent Program

2024-2025

At ABB, I was tasked with designing and developing an app for ABB's talent program. The app includes a timeline of all events and details of the program, managed by the leaders, as well as social media–style communication and posts between participants.

Commercial Mobile App
FlutterReactPHP Backend
4Power Portal Website & App
4Power Portal Website & App
07

4Power Portal Website & App

2024

For 4Power, I was tasked with redesigning and developing a new website to manage and control their Electricity Saver devices. The platform included smart features that allowed users to automate device control based on a variety of conditions, including weather temperatures, real-time electricity prices, and the time of day.

Commercial Web Development
ReactAPI Integrations
4Power SPA Control Website & App
4Power SPA Control Website & App
08

4Power SPA Control Website & App

2024

I've also developed the 4Power SPA Control website and mobile app for controlling their 4Power SPA devices with smart energy saving functions. Similarly to the 4Power Portal, I developed the website in React and used Flutter and SwiftUI to develop the mobile app containing a web view.

Commercial Web Development
ReactAPI Integrations
School Library Website
School Library Website
09

School Library Website

2024

During high school, I created a website for my school’s library as part of a Service As Action project. The site featured a homepage where the librarian could share updates, post events, and upload photos for students and parents to view. Additionally, I developed a form that allowed students to sign up for quiet reading sessions, which automatically sent email notifications to teachers for verification.

Community Service Web Development
HTMLCSSJavaScriptPHP Backend
Watchmaker Website
Watchmaker Website
10

Watchmaker Website

2024

This is a commercial website I developed for a watchmaker to manage and organize his watch calibers and spare parts. The platform allows him to efficiently filter and match compatible components. The entire website was built using PHP with a MySQL database and styled with TailwindCSS.

Commercial Web Development
HTMLCSSJavaScriptPHP Backend
CodeSnippy
CodeSnippy
11

CodeSnippy

2024

Your go-to tool for effortlessly and quickly organizing code snippets is our app. CodeSnippy was developed with passion to make sure your snippets are always accessible and ready to increase productivity. We know you love to copy and paste, so we've made it easy and quick for you to access and use your snippets with our user-friendly interface and wide language support, enabling you to code more efficiently.

Personal macOS App
SwiftUI
Temp-Tech
Temp-Tech
12

Temp-Tech

2024

In late 2024, I was commissioned by Temp-Tech, a company specializing in cooling systems and heat pumps, to redesign their website. The project involved creating a modern, user-friendly design and integrating additional functionalities, such as multi-language support, to enhance the user experience and align with their needs.

Commercial Web Development
HTMLTailwindCSSPHP
ZeroHero iPad app for ABB
ZeroHero iPad app for ABB
13

ZeroHero iPad app for ABB

2023

In 2023, as my first official project at ABB, I developed ZeroHero, a game-like simulation app used to train new interns by demonstrating the complexity of managing an energy grid manually. The simulation involved controlling the timing and output of various resources like heat pumps, biomass systems, and electric boilers while minimizing costs. With a built-in leaderboard, it offers a practical, fun, and challenging real-world simulation of energy management.

Commercial iPad App
SwiftUIPHP Backend

EXPERIENCE

2025 — PRESENT

FOUNDER & SOLO DEVELOPER

AppVerge (Self-Owned)

• I founded and operate AppVerge, my own software business

• Fully responsible for design, development, publishing, and marketing

• Developed and published several apps, including DockFix and SnappyNotes app)

Entrepreneurship Product Design Development Marketing
2023 — PRESENT

SOFTWARE DEVELOPER

ABB

• Developed Talent Program Mobile App

• Developed SafeCheck iPad App

• Developed ZeroHero iPad App

Mobile Apps React Dashboards
2022 — PRESENT

SOFTWARE DEVELOPER

4Power

• Developed 4Power Portal Website and app

• Developed 4Power SPA Control Website and app

• Contributed to other smaller tasks and projects

Mobile Apps React Dashboards

SKILLS

APP DEVELOPMENT

  • Swift, SwiftUI (Primary Language)
  • Xcode
  • Flutter

OTHER LANGUAGES & TOOLS

  • C++
  • Python
  • React
  • Git & Source Control

GAME DEVELOPMENT

  • Unity
  • C#
  • Godot 4
  • Game Design Principles

CONTACT

CONTACT DETAILS

Based in Denmark
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Have a question or inquiry?

Whether you have a question about my work, want to discuss a potential collaboration, or just want to say hello, I'm always happy to connect.

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