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I will add features and integrations to your ios swift app
Anton Serdiuk
About this gig
Need a new feature or integration added to your existing iOS app?
Im an iOS Developer with 5+ years of commercial experience working with Swift, UIKit, SwiftUI, and production codebases.
I can help you implement:
REST API integrations and JSON parsing
Firebase functionality
Push Notifications
CoreLocation and geolocation features
MapKit and Google Maps
Core Data and local storage
New UIKit / SwiftUI screens and UI logic
Camera-related functionality
Third-party SDK integrations
Navigation and business logic
Existing feature improvements
TestFlight and App Store related changes
I can join an existing codebase, understand its structure, implement the requested functionality, and test the result.
This Gig is mainly for adding features to an existing iOS application. For complex features or unclear requirements, please contact me before ordering so I can review the scope and recommend the right package.
Get to know Anton Serdiuk
Anton Serdiuk
iOS Developer Swift Bug Fixes and App Support
- FromUkraine
- Member sinceJun 2026
- Avg. response time1 hour
Languages
Ukrainian, Russian, English, Polish
iOS Developer with 5+ years of commercial experience. I work with Swift, UIKit, SwiftUI, REST APIs, Firebase, Core Data, Combine, Push Notifications, CoreLocation, MapKit and Google Maps. I specialize in debugging, bug fixing, improving existing iOS apps and integrating APIs and SDKs. I also have practical experience with Python, OpenCV, YOLO and TensorFlow for computer vision and image/video processing.
My Portfolio
FAQ
Do you work with existing iOS applications?
Yes. I have extensive commercial experience maintaining, extending, and improving existing Swift, UIKit, and SwiftUI projects.
What if I am not sure which package I need?
Send me a description of the feature, screenshots, designs, API documentation, or any other relevant information. I will review it and recommend the appropriate package.
Can you integrate REST APIs, Firebase, maps, or push notifications?
Yes. I can work with REST APIs, Firebase, Push Notifications, CoreLocation, MapKit, Google Maps, Core Data, and third-party SDK integrations.
Can you build a complete iOS app from scratch?
Possibly, but this Gig is primarily intended for adding features and integrations to an existing app. Please contact me first for a full application.
Does a revision include adding another feature?
No. A revision covers adjustments related to the originally agreed feature. Additional functionality or unrelated changes require an extra service or separate order.
