Oaca Stefanita
Verified Expert in Engineering
iOS Developer
With over nine years of iOS experience, Stef's worked on all Apple products—iPhone, iPad, Mac, Apple Watch, Apple TV—and has used every Apple technology out there (Core ML, ARKit, RealityKit, and many others). He can work with any SDK, API, or library and develop amazing apps taking advantage of Apple's ecosystem. Stef is always up to date with the best practices, the newest technologies, the latest security updates, and the latest rumors regarding the industry's next big thing.
Portfolio
Experience
Availability
Preferred Environment
Android Studio, Adobe Photoshop, iOS, MacOS, Xcode, Figma, iPad, Apple TV, Apple Watch, iPhone
The most amazing...
...app I've developed was an augmented reality application which, after taking a personality test, created a unique flower and presented it in AR.
Work Experience
iOS Developer
Contarini Ventures, LLC
- Updated and improved an app with a large user base called Leap Second.
- Created new and customizable user flows within the old UI.
- Oversaw new releases, making sure all the new changes were working properly.
- Integrated new SDKs for A/B testing, analytics, purchases, and customizable paywalls, among others.
Augmented Reality iOS Developer
Trigger
- Developed an iOS app that generates and presents a unique flower in AR based on a personality test from the user.
- Created the project from scratch using Swift, UIKit, ARKit, and a REST API.
- Worked side by side with the Android team, design team, and client.
iOS Developer
Contarini Ventures, LLC
- Updated and improved an app called Moment Garden with a large user base.
- Tracked and fixed existing bugs and issues using Linear and Notion, among other tools.
- Proposed improvements and integrated new SDKs in the old codebase.
Flutter Developer
Boohead Inc
- Developed a cross-platform app using Flutter, allowing kids to draw shapes using their fingers.
- Created a shape-drawing algorithm that is both fast and RAM effective.
- Built everything from scratch to the final release.
Artificial Intelligence iOS Developer
Retinus
- Developed an iOS app that used a TensorFlow AI model in order to detect objects seen with the camera.
- Worked as a part of multi developers iOS team, my work was only related to the integration of the AI model.
- Created a proof of concept project using Core ML (Apple's Machine Learning tool).
Augmented Reality iOS Developer
Coventry University
- Developed an iOS-augmented reality application for displaying university projects.
- Created a Fibonacci-based algorithm for displaying the project in AR in a sphere shape.
- Implemented the project using Swift and ARKit and followed the provided design.
Senior iOS Developer
CozmicGo
- Helped with the final part of the development process.
- Tracked down and fixed bugs, implemented UI improvements, and improved the architecture.
- Clarified how the app works in detail with the client as well as estimating server costs.
Augmented Reality iOS Developer
Megaverse
- Developed an app that draws in 3D space using Apple's ARKit.
- Developed features such as freehand drawing, line drawing, extrusion of 2D shapes, detection of vertical and horizontal planes, and snap drawing to detected planes.
- Created the entire project from scratch, establishing architecture and providing time estimates.
- Extended the app to multiuser shared sessions with a synchronization mechanism and undo feature.
CTO | Co-founder
Codapper Software
- Built applications with features including live audio and video calls, live chat, complex animations, push notifications, in-app purchases, and subscriptions.
- Developed complex project architectures from scratch.
- Handled the entire lifecycle of the project from first engaging the client to the final delivery and the maintenance that is crucial in the first weeks after the launch of the product.
- Developed applications for macOS, watchOS, and tvOS besides the iOS applications.
- Created stunning applications with augmented reality features using ARKit.
- Used the whole range of device features from GPS, biometrics, and accelerometers to Bluetooth file transfers.
iOS Developer
Netrom Software
- Developed various iOS applications for customers with features such as online and offline use, user management, live chats, and multithread image processing.
- Tracked the project lifecycle using Jira and Agile and became familiar with project management techniques.
- Oversaw the entire lifecycle of an iOS application from starting the project to uploading to the App Store.
Experience
PPC Revenue
Spending Tracking
Online Game
It had live chats, live audio, and live video and could accommodate up to six players at the same time. The game used Sockets-based connectivity and XMPP chat. It was written in Swift and was also designed to work offline. It was released to the App Store in 2016
Online Market Place
Human Resources
Social Media
CocoaPods Library
Sound and Calls Recorder
Files Management
CozmicGO
https://www.cozmicgo.orgBlock
https://xrstories.co.uk/introducing-block-an-xr-scenographic-tool/Object Recognition Using Artificial Intelligence
The application had a real-time view of the detected objects.
Leap Second
https://apps.apple.com/us/app/leap-second-everyday-videos/id1021405859Moment Garden
https://momentgarden.comPolinations
https://www.polinations.comCU Degree Show
https://apps.apple.com/gb/app/cu-degree-show/id1568162736Skills
Languages
Swift, Objective-C, C++, Dart
Frameworks
iOS SDK, UIKit, iPhone SDK, Cocoa, iOS SceneKit, Metal, Core ML, ARKit, SwiftUI, Flutter
Libraries/APIs
CocoaPods, Apple Subscriptions, iOS Native Libraries, Stripe, TensorFlow
Tools
Apple Push Notifications, Firebase Authentication, Git, Jira, Slack, Xcode, Sketch, Flinto, Adobe Photoshop, Adobe Experience Design (XD), Android Studio, Figma
Paradigms
REST, Agile, Mobile App Design
Platforms
iOS, Firebase, MacOS, WatchOS, tvOS, Twilio, Apple TV, Apple Watch, Amazon Web Services (AWS), Android
Other
Augmented Reality (AR), iPad, iPhone, APIs, In-app Purchases, App Store, Subscriptions, Minimum Viable Product (MVP), iOS Camera, AR Interfaces, XMPP, Geolocation, Video Streaming, Audio Streaming, iOS Video, TensorFlow Lite, Artificial Intelligence (AI), Videos, Leadership, Team Management, Networking, Video Processing, 3D, 3D Modeling
Industry Expertise
Project Management
Education
Bachelor's Degree in Computer Science
University of Craiova - Craiova, Romania
Certifications
Cisco CCNA (Cisco Certified Network Associate)
Cisco at the University of Craiova
Certificate in Advanced English
University of Cambridge
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