✨ Native iOS/macOS Apps Developer 👨‍💻 I have been building iOS apps since 2011, and I love it. I know what it's like to start an indie project, launch a startup, and grow a product with millions of users. I'm eager to use that experience to ensure your business success. What I offer: • iOS Engineering: ◦ Swift / Objective-C ◦ SwiftUI / UIKit / Autolayout / Lottie ◦ Firebase ◦ Software Design: Clean Architecture, MVVM / MVC / MVVM+R / VIPER ◦ Concurrency: GCP, Operation Queue, and Modern Concurrency (async / await) ◦ Payments: In-App Purchases and In-App Subscriptions. ◦ CocoaPods, Swift PM, Carthage, git ◦ Unit / Integration / UI Tests ◦ Networking: HTTPs, REST, WebSocket using native APIs / Alamofire / Kingfisher / Starscream, etc. ◦ Persitance: Core Data, Sqlite, Realm ◦ OpenAI API / CoreML / CreateML ◦ Bluetooth LE / working with external hardware • Code review: I can perform an audit on your project to ensure it's ready for shipment / assess its quality, and maintainability. • Consulting: ◦ Estimate time/costs on a scope you provide ◦ Determine whether some idea is feasible ◦ Research the best engineering solution for your idea

Hello! I’m Konstantine, a skilled iOS developer with extensive experience building high-quality, native iOS applications for iPhone and iPad. I specialize in turning your ideas into innovative, user-friendly mobile apps using Swift, Objective-C, and the latest Apple development tools. Whether you need a brand-new app or improvements to an existing one, I’m ready to deliver results that exceed expectations. What I Offer: 📲 Native iOS App Development Expertise in building scalable, performant iOS apps with clean code architecture from concept to App Store deployment. ⚙️ App Maintenance & Support Ongoing app updates, optimization, and feature enhancements to keep your app secure, up-to-date, and fully functional. 🔧 Bug Fixing & Troubleshooting Rapid identification and resolution of bugs to ensure your app delivers smooth, crash-free user experiences. 🖇️ API & Third-Party Integration Seamless integration of RESTful APIs, Firebase, payment gateways, and other external services to extend app capabilities. Why Work With Me: ✅ Proven iOS Development Track Record Delivered apps in e-commerce, social networking, healthcare, education, and more — tailored to diverse client needs. ⏱️ On-Time & On-Budget Delivery Efficient project management ensures timely delivery without compromising quality or budget. 🗣️ Clear Communication & Collaboration Regular updates and transparent communication keep you informed and involved throughout the project lifecycle. 🤝 Client-Focused Approach Your satisfaction is my priority — I collaborate closely to bring your vision to life with attention to detail and creativity. ✂️ Problem Solving & Innovation Skilled at tackling complex technical challenges and finding smart, scalable solutions. ⸻ Ready to build your next iOS app? Whether it’s a startup MVP or a full-featured enterprise solution, let’s connect and create something amazing together! Reach out today.

I’m a Senior iOS Engineer with 11+ years of professional experience, helping startups and enterprises build stable, scalable, and App Store–ready iOS applications. I’ve delivered 45+ production apps across fintech, healthcare, AI, IoT, and enterprise domains. My focus is not just features, it’s clean architecture, long-term maintainability, and performance-safe code that teams can confidently scale. I specialize in modern iOS development using Swift 6+, Xcode 26, SwiftUI, UIKit, Swift Concurrency (async/await), Combine, and Swift Package Manager. I design modular systems, reusable frameworks, and SDK-level integrations that remain clean and reliable as products grow. What I do best: Build production-grade iOS apps & SDKs Design scalable architectures (MVVM, VIPER, Coordinator) Create reusable frameworks & SPM modules Deliver SwiftUI & UIKit apps with smooth UI and animations Handle complex integrations (AI, AR, IoT, networking, native bridges) Ensure testing, CI/CD, and safe long-term maintenance I take full ownership from architecture and technical decisions to implementation, testing, and final delivery. Clients work with me when they want a senior engineer who gets it right the first time. If you’re looking for a reliable, experienced iOS developer who can build and scale your product with confidence, I’m ready to help.

🚀 iOS Developer | 6+ Yrs | Built for Scale, Designed for Users 🎯 Swift • Objective-C • Clean Architecture • UX-Obsessed I don’t just build apps — I craft mobile experiences that perform, scale, and convert. With over 5 years of hands-on iOS development experience and 2 years at a fast-paced social media company, I know what it takes to ship apps that stand out in crowded markets. Former mid-senior iOS developer at Data Wow, I’ve led feature-rich app launches from scratch, optimized legacy codebases, and collaborated cross-functionally to deliver seamless, high-impact mobile products. What You Get: ✅ Clean, maintainable code (Swift / Objective-C) ✅ Deep focus on UX & performance ✅ End-to-end delivery (from prototyping to App Store) ✅ Fast, clear communication with zero guesswork I'm now looking for full-time roles (remote/hybrid) where I can grow, build meaningful products, and contribute to companies that value excellence. Open to relocation for the right opportunity. My personal goal? Level up professionally while easing the financial weight off my family.

I am an iOS Developer with over 4 years of experience in developing and maintaining mobile applications. My expertise focuses on iOS app development, with a strong ability to create efficient, user-friendly, and high-performance solutions. I am ready to help you build innovative and high-quality iOS applications.

High expertise in iOS development, specially on tackling complex problems. Focus on "done is better than perfect", always making the best tradeoffs between effort and value. With my management experience, I can either coordinate long-term projects with larger teams or take on short-term tasks to achieve quick wins. I'm also strong in troubleshooting and navigating unknown codebases, which is helpful to figure out issues with existing apps or simply adding new features.

I’m an iOS developer with a proven record of building secure, high-quality, and production-ready apps across different domains, from fintech and subscription platforms to fitness, wellness, and AI-powered productivity tools. My focus is always on creating intuitive user flows, scalable architectures, and pixel-perfect SwiftUI interfaces that meet both business and user needs. Over the years, I’ve worked extensively with: Swift & SwiftUI – modern, modular architectures (MVVM, Combine) for clean and maintainable code. Monetization systems – in-app purchases, subscriptions, RevenueCat, and Stripe integration. APIs & Data – REST APIs, Plaid integration for financial data, secure token handling, and local persistence. Realtime Features – motion and sensor data (AirPods, accelerometer), live notifications, and family management flows. Backends – Firebase, Supabase, and custom Python backends for authentication, storage, and rules logic. App Lifecycle – TestFlight testing, App Store submission, and ensuring apps meet Apple’s strict guidelines. Clients often highlight my ability to: Translate complex product ideas into simple, user-friendly flows. Deliver fast iterations without sacrificing stability or quality. Communicate clearly, set realistic milestones, and take full ownership of delivery. Pay strong attention to security, performance, and user trust, especially in fintech and family-oriented apps. I approach every project with the mindset of a long-term partner, not just a freelancer. My goal is always to build apps that feel polished, reliable, and genuinely useful to their users, apps that could sit in the top 1% of the App Store.

Senior full‑stack iOS engineer (Swift/SwiftUI/UIKit) who can ship the mobile app + the backend end‑to‑end (Node.js + TypeScript). If you have an existing app that needs to scale, stabilize, or move faster, I can step in, quickly get context, and start delivering. What I do best • iOS/iPadOS/macOS development in Swift (SwiftUI + UIKit) • API design + implementation (Node.js/TypeScript), Firebase, REST/GraphQL integrations • Architecture & codebase health: MVVM, DI, modularization, testing • Performance & reliability: profiling, crash fixes, memory leaks, smooth UI • Legacy modernization: UIKit → SwiftUI, Objective‑C → Swift Typical engagements 1) Audit (3–5 days, fixed price): quick assessment + prioritized plan + first fixes 2) Stabilization/feature sprint (1–2 weeks, fixed): ship milestones, unblock releases 3) Ongoing retainer (monthly): predictable delivery cadence + support Recent outcomes ✓ Built apps with 100k+ monthly active users ✓ Helped startups gain early adopters via MVP + TestFlight ✓ Modernized legacy codebases and improved performance/stability If you share your repo/API constraints and your top 1–2 goals for the next 2 weeks, I’ll propose a tight plan with milestones.

I’m an experienced iOS developer with a strong focus on crafting high-performance mobile applications using Swift and SwiftUI. I excel in building intuitive, secure, and scalable apps, with extensive knowledge in API integration, Firebase, and payment systems like Stripe. Whether you need a new app developed from the ground up or enhancements to an existing project, I’m committed to delivering top-quality work on schedule and within your budget. In addition to my technical skills, I’m passionate about creating seamless user experiences and ensuring that every app I develop meets the highest standards of functionality and design. I’m eager to collaborate on projects that challenge my abilities and contribute to your success.

I develop efficient, high-performance Apple Ecosystem apps (iOS, iPadOS, and macOS) using Swift, SwiftUI, and UIKit. I build clean, scalable, and well-structured solutions that turn your ideas into high-quality apps. I also work with Flutter when needed. ✔️ SwiftUI & UIKit specialist ✔️ Pixel-perfect UI and seamless UX design ✔️ Strong architecture knowledge (MVVM, VIPER, TCA, Clean Architecture) ✔️ API integration with REST, GraphQL, gRPC and Firebase ✔️ App Store deployment and maintenance experience ✔️ Cross-platform support with Flutter 🧰 Additional Tech Stack CloudKit, Firebase, Google Cloud, AWS, App Store Connect, App Clip I’m passionate about developing efficient, high-quality iOS apps that help businesses grow. Feel free to reach out. I’d love to connect and start building something great for your business.