Cornelius Mark
@corneliusmark.bsky.social
Innovative tech developer making a mark in the app development world. Need innovation/developer for your app? Contact me. ⬇️
Pinned
I craft scalable macOS/iOS apps that grow with you.
🌟🌟🌟🌟🌟 "Great communication, fluent English, quick action."
Need a robust app? DM me let’s talk!
🌟🌟🌟🌟🌟 "Great communication, fluent English, quick action."
Need a robust app? DM me let’s talk!
July 14, 2025 at 6:48 PM
I craft scalable macOS/iOS apps that grow with you.
🌟🌟🌟🌟🌟 "Great communication, fluent English, quick action."
Need a robust app? DM me let’s talk!
🌟🌟🌟🌟🌟 "Great communication, fluent English, quick action."
Need a robust app? DM me let’s talk!
AWS or Azure for app scaling? What’s your stack? 👇
July 13, 2025 at 10:09 AM
AWS or Azure for app scaling? What’s your stack? 👇
Figma or Sketch for iOS prototyping? What’s your tool? 👇
July 12, 2025 at 9:02 PM
Figma or Sketch for iOS prototyping? What’s your tool? 👇
SwiftUI previews cut UI dev time by 25%.
What’s your SwiftUI hack? 👇
What’s your SwiftUI hack? 👇
July 11, 2025 at 7:08 PM
SwiftUI previews cut UI dev time by 25%.
What’s your SwiftUI hack? 👇
What’s your SwiftUI hack? 👇
I make macOS/iOS apps run like lightning. From CPU to memory, I optimize it all.
Need a faster app? DM me let’s tune it!
Need a faster app? DM me let’s tune it!
July 10, 2025 at 8:14 PM
I make macOS/iOS apps run like lightning. From CPU to memory, I optimize it all.
Need a faster app? DM me let’s tune it!
Need a faster app? DM me let’s tune it!
I turn crash logs into solutions. Specializing in macOS/iOS debugging.
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
July 9, 2025 at 2:56 PM
I turn crash logs into solutions. Specializing in macOS/iOS debugging.
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
I turn crash logs into solutions. Specializing in macOS/iOS debugging.
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
July 8, 2025 at 1:02 PM
I turn crash logs into solutions. Specializing in macOS/iOS debugging.
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
🌟 "Mark is very professional and patient developer."
Need bug-free apps? DM me let’s talk!
From Swift to SwiftUI, I build apps that shine on macOS and iOS.
Need cutting-edge code? DM me let's build it!
Need cutting-edge code? DM me let's build it!
July 4, 2025 at 9:00 AM
From Swift to SwiftUI, I build apps that shine on macOS and iOS.
Need cutting-edge code? DM me let's build it!
Need cutting-edge code? DM me let's build it!
Reduced a macOS app’s CPU usage by 30% with async dispatch queues. Profile with Instruments first.
Got lag? DM me let's fix it!
Got lag? DM me let's fix it!
July 3, 2025 at 10:46 AM
Reduced a macOS app’s CPU usage by 30% with async dispatch queues. Profile with Instruments first.
Got lag? DM me let's fix it!
Got lag? DM me let's fix it!
Maintainable code saves 40% on future dev costs.
What’s your top coding rule? 👇
What’s your top coding rule? 👇
July 2, 2025 at 10:50 AM
Maintainable code saves 40% on future dev costs.
What’s your top coding rule? 👇
What’s your top coding rule? 👇
Also, it's possible to build all the nifty SwiftUI graphics in UIKit. It's just more work.
SwiftUI might be the future, but UIKit is the GOAT.
July 1, 2025 at 3:08 PM
Also, it's possible to build all the nifty SwiftUI graphics in UIKit. It's just more work.
From kernel panics to UI freezes, I’ve debugged it all on macOS.
🌟 "Mark is very professional and patient developer."
Need a bug-free app? DM me let's get started!
🌟 "Mark is very professional and patient developer."
Need a bug-free app? DM me let's get started!
July 1, 2025 at 2:59 PM
From kernel panics to UI freezes, I’ve debugged it all on macOS.
🌟 "Mark is very professional and patient developer."
Need a bug-free app? DM me let's get started!
🌟 "Mark is very professional and patient developer."
Need a bug-free app? DM me let's get started!
Revamped a macOS app’s App Store page. Click-through rate rose 30% with better visuals.
Struggling with ASO? DM me let's fix it!
Struggling with ASO? DM me let's fix it!
June 30, 2025 at 8:48 AM
Revamped a macOS app’s App Store page. Click-through rate rose 30% with better visuals.
Struggling with ASO? DM me let's fix it!
Struggling with ASO? DM me let's fix it!
Scale your UI with SwiftUI. DM me let's build it!
June 29, 2025 at 9:52 AM
Scale your UI with SwiftUI. DM me let's build it!
Figma or Xcode for iOS prototyping?
What’s your tool? 👇
What’s your tool? 👇
June 28, 2025 at 7:20 PM
Figma or Xcode for iOS prototyping?
What’s your tool? 👇
What’s your tool? 👇
Built a SwiftUI macOS app with zero crashes by using Combine for state. Cut dev time by 20%.
🌟 "Mark is very professional and patient developer."
Need SwiftUI help? DM me let's code!
🌟 "Mark is very professional and patient developer."
Need SwiftUI help? DM me let's code!
June 27, 2025 at 3:36 PM
Built a SwiftUI macOS app with zero crashes by using Combine for state. Cut dev time by 20%.
🌟 "Mark is very professional and patient developer."
Need SwiftUI help? DM me let's code!
🌟 "Mark is very professional and patient developer."
Need SwiftUI help? DM me let's code!
Instruments or manual profiling for iOS performance?
What’s your choice? 👇
What’s your choice? 👇
June 26, 2025 at 12:34 PM
Instruments or manual profiling for iOS performance?
What’s your choice? 👇
What’s your choice? 👇
Protocol-oriented or object-oriented for Swift?
What’s your pick? 👇
What’s your pick? 👇
June 25, 2025 at 9:55 AM
Protocol-oriented or object-oriented for Swift?
What’s your pick? 👇
What’s your pick? 👇
Use breakpoints with conditions in Xcode to catch bugs 30% faster.
Set them on suspect variables and save hours.
Set them on suspect variables and save hours.
June 24, 2025 at 11:12 AM
Use breakpoints with conditions in Xcode to catch bugs 30% faster.
Set them on suspect variables and save hours.
Set them on suspect variables and save hours.
CloudKit or Firebase for iOS apps?
What’s your pick? 👇
What’s your pick? 👇
June 23, 2025 at 7:12 AM
CloudKit or Firebase for iOS apps?
What’s your pick? 👇
What’s your pick? 👇
Keywords or screenshots: What’s more critical for ASO? 👇
June 22, 2025 at 12:08 PM
Keywords or screenshots: What’s more critical for ASO? 👇
Native iOS navigation or custom UX?
What’s your take? 👇
What’s your take? 👇
June 21, 2025 at 7:12 AM
Native iOS navigation or custom UX?
What’s your take? 👇
What’s your take? 👇
I specialize in SwiftUI for seamless macOS/iOS apps.
🌟 "Mark is an amazing freelancer. Close attention to detail."
Ready for a sleek app? DM me let's talk!
🌟 "Mark is an amazing freelancer. Close attention to detail."
Ready for a sleek app? DM me let's talk!
June 20, 2025 at 8:06 AM
I specialize in SwiftUI for seamless macOS/iOS apps.
🌟 "Mark is an amazing freelancer. Close attention to detail."
Ready for a sleek app? DM me let's talk!
🌟 "Mark is an amazing freelancer. Close attention to detail."
Ready for a sleek app? DM me let's talk!