🚀 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.

✨ 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

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.

I help startups and businesses build high-performance, production-ready mobile applications for iOS and Android using both native and cross-platform technologies. With 8+ years of experience, I've launched mobile products from MVP to enterprise scale, delivering apps that are fast, scalable, and built for long-term growth. My expertise spans native iOS development with Swift, SwiftUI, and UIKit, cross-platform development with Flutter and React Native, and the backend systems required to power modern mobile applications. Mobile Development Expertise 📱 Native iOS Development (Swift, SwiftUI, UIKit) 🚀 Flutter (Cross-platform iOS & Android) ⚛️ React Native (Hybrid Mobile Applications) 🤖 Android Development 🔥 Firebase & Supabase 🔔 Push Notifications 📍 GPS & Real-time Location Tracking 💳 Payment Integrations (Stripe, Razorpay, Apple Pay) 💬 Chat, Messaging & Real-time Features 🔐 Authentication & Security 📦 App Store & Google Play Deployment ⚡ Performance Optimization & App Maintenance Supporting Technologies React.js & Next.js Node.js & Express.js PostgreSQL, MongoDB & Firebase REST APIs & Third-party Integrations AWS, Railway, Render & DigitalOcean Industries I've Built For SaaS Platforms Marketplace Applications Logistics & Delivery Apps E-commerce Solutions AI-powered Mobile Applications Subscription-based Apps Gym & Business Management Systems On-demand Service Platforms I develop complete mobile products—from UI implementation and app architecture to backend integration, cloud deployment, and App Store/Google Play release. Every project follows clean architecture, scalable code practices, and modern development standards. Whether you need a native iOS application, a Flutter app, a React Native application, or a complete mobile product backed by scalable APIs, I can take your idea from concept to production. Mobile-first development. Clean architecture. Reliable delivery.

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 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.

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.

✅ Mobile Development Expertise I specialize in building high-quality, scalable mobile applications with a strong focus on performance, clean architecture, and long-term maintainability. • Native iOS Development – Expert in Swift and SwiftUI, delivering elegant, high-performance iOS apps using modern design patterns • Cross-Platform Development – Advanced experience with Flutter, creating visually polished, natively compiled apps for iOS, Android, web, and desktop from a single codebase • Advanced Platform Integrations – Seamless integration of complex third-party services, including: – Social platforms (Facebook, Twitter/X, Instagram, LinkedIn) – Payments (Stripe, Apple Pay, In-App Purchases) – Subscription systems (RevenueCat for reliable cross-platform subscription management) – Scalable push notification architectures ✅ Backend & Cloud Infrastructure I design and implement secure, scalable backend systems that support real-world production applications. • Backend-as-a-Service – Strong expertise in Supabase (PostgreSQL, real-time subscriptions, authentication, storage) and Firebase/Firestore • Google Cloud Certified Associate Engineer • Cloud infrastructure design, deployment, and optimization • Strong focus on security, performance, and scalability best practices ✅ Specialized Technical Domains • IoT device connectivity and real-time data handling • Bluetooth and local network communication • Healthcare applications with HL7 FHIR implementation experience • Monetization strategy – end-to-end implementation of subscriptions and in-app purchase flows using RevenueCat ✅ Technical Strengths • Native iOS (Swift, SwiftUI) • Cross-platform development (Flutter, Dart) • Backend systems (Supabase, Firebase/Firestore) • Payments & subscriptions (RevenueCat, Stripe, Apple Pay) • Robust unit testing and enterprise-grade mobile architecture ✅ Professional Highlights • Consistently maintained 5-star client ratings • Clear, native-level English communication • Proven track record delivering complex, mission-critical mobile applications

I'm a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗶𝗢𝗦 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 with 𝟲+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 crafting high-performance, secure, and scalable iOS applications. From e-commerce and delivery platforms to AI-driven accessibility, I specialise in building apps that are fast, intuitive, and production-ready. ✅ 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 • 𝐢𝐎𝐒 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Swift, SwiftUI, Combine, Objective-C, Core Data • 𝐀𝐩𝐩 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞: MVVM, VIPER, Clean Architecture • 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞: Crash reduction, faster launch times, memory optimization • 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲: Authentication, secure payments (PayPal, Stripe, Adyen) • 𝐂𝐈/𝐂𝐃 & 𝐃𝐞𝐯𝐎𝐩𝐬: GitHub Actions, Jenkins, Bitrise • 𝐋𝐞𝐚𝐝𝐞𝐫𝐬𝐡𝐢𝐩: Squad lead, code reviews, mentoring juniors 📌 𝐍𝐨𝐭𝐚𝐛𝐥𝐞 𝐀𝐜𝐡𝐢𝐞𝐯𝐞𝐦𝐞𝐧𝐭𝐬 🏆 𝐖𝐨𝐧 𝐞𝐥𝐆𝐫𝐨𝐜𝐞𝐫 𝐇𝐚𝐜𝐤𝐚𝐭𝐡𝐨𝐧 for implementing 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐟𝐞𝐚𝐭𝐮𝐫𝐞𝐬 📉 𝐑𝐞𝐝𝐮𝐜𝐞𝐝 𝐜𝐫𝐚𝐬𝐡 𝐫𝐚𝐭𝐞𝐬 𝐛𝐲 𝟑𝟎% using Crashlytics 💳 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐞𝐝 𝐬𝐞𝐜𝐮𝐫𝐞 𝐩𝐚𝐲𝐦𝐞𝐧𝐭𝐬 across fintech and delivery apps ⚙️ 𝐋𝐞𝐝 𝐦𝐢𝐠𝐫𝐚𝐭𝐢𝐨𝐧 to modern architectures, boosting scalability and maintainability 💡 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧𝐬 I’ve developed and led multiple applications across a wide range of industries, including: • 🤖 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐀𝐩𝐩𝐬 (𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐂𝐡𝐚𝐭𝐆𝐏𝐓-𝐛𝐚𝐬𝐞𝐝 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬) • 🛒 𝐆𝐫𝐨𝐜𝐞𝐫𝐲 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲 𝐀𝐩𝐩𝐬 • 🏠 𝐏𝐫𝐨𝐩𝐞𝐫𝐭𝐲 𝐁𝐮𝐲𝐢𝐧𝐠 / 𝐑𝐞𝐧𝐭𝐚𝐥 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 • 💬 𝐒𝐨𝐜𝐢𝐚𝐥 𝐌𝐞𝐝𝐢𝐚 & 𝐂𝐡𝐚𝐭 𝐀𝐩𝐩𝐬 • 🎵 𝐌𝐮𝐬𝐢𝐜 & 𝐀𝐮𝐝𝐢𝐨 𝐒𝐭𝐫𝐞𝐚𝐦𝐢𝐧𝐠 𝐀𝐩𝐩𝐬 • 🎥 𝐕𝐢𝐝𝐞𝐨 𝐒𝐭𝐫𝐞𝐚𝐦𝐢𝐧𝐠 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 • 📸 𝐈𝐦𝐚𝐠𝐞 𝐈𝐝𝐞𝐧𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧 & 𝐑𝐞𝐜𝐨𝐠𝐧𝐢𝐭𝐢𝐨𝐧 𝐀𝐩𝐩𝐬 • 📚 𝐄𝐝𝐮𝐜𝐚𝐭𝐢𝐨𝐧𝐚𝐥 & 𝐄-𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 • 🧘 𝐇𝐞𝐚𝐥𝐭𝐡, 𝐅𝐢𝐭𝐧𝐞𝐬𝐬 & 𝐌𝐞𝐝𝐢𝐭𝐚𝐭𝐢𝐨𝐧 𝐀𝐩𝐩𝐬 • 🧠 𝐏𝐫𝐨𝐜𝐭𝐨𝐫𝐢𝐧𝐠 𝐀𝐩𝐩𝐬 • 📊 𝐑𝐞𝐩𝐨𝐫𝐭𝐢𝐧𝐠 & 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬 𝐓𝐨𝐨𝐥𝐬 • 🏢 𝐂𝐮𝐬𝐭𝐨𝐦 𝐄𝐑𝐏 & 𝐂𝐑𝐌 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 • 👥 𝐒𝐭𝐚𝐟𝐟 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 & 𝐓𝐢𝐦𝐞 𝐓𝐫𝐚𝐜𝐤𝐢𝐧𝐠 𝐀𝐩𝐩𝐬 • 📅 𝐂𝐚𝐥𝐞𝐧𝐝𝐚𝐫 & 𝐒𝐜𝐡𝐞𝐝𝐮𝐥𝐢𝐧𝐠 𝐀𝐩𝐩𝐬 • 🧩 𝐂𝐮𝐬𝐭𝐨𝐦 𝐈𝐧𝐭𝐞𝐫𝐧𝐚𝐥 𝐂𝐨𝐦𝐩𝐚𝐧𝐲 𝐓𝐨𝐨𝐥𝐬 • 🔐 𝐏𝐡𝐨𝐧𝐞 𝐋𝐨𝐜𝐤 & 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐔𝐭𝐢𝐥𝐢𝐭𝐢𝐞𝐬 • 🪄 𝐀𝐩𝐩𝐨𝐢𝐧𝐭𝐦𝐞𝐧𝐭 𝐁𝐨𝐨𝐤𝐢𝐧𝐠 & 𝐒𝐞𝐫𝐯𝐢𝐜𝐞 𝐒𝐜𝐡𝐞𝐝𝐮𝐥𝐢𝐧𝐠 𝐀𝐩𝐩𝐬 💬 Whether you're 𝐥𝐚𝐮𝐧𝐜𝐡𝐢𝐧𝐠 𝐚 𝐧𝐞𝐰 𝐢𝐎𝐒 𝐚𝐩𝐩 or 𝐮𝐩𝐠𝐫𝐚𝐝𝐢𝐧𝐠 𝐚𝐧 𝐞𝐱𝐢𝐬𝐭𝐢𝐧𝐠 𝐨𝐧𝐞, I bring the 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞, 𝐩𝐫𝐞𝐜𝐢𝐬𝐢𝐨𝐧, and 𝐦𝐢𝐧𝐝𝐬𝐞𝐭 to deliver 𝐜𝐥𝐞𝐚𝐧, 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭, and 𝐮𝐬𝐞𝐫-𝐟𝐫𝐢𝐞𝐧𝐝𝐥𝐲 solutions. Let’s collaborate to 𝐛𝐫𝐢𝐧𝐠 𝐲𝐨𝐮𝐫 𝐚𝐩𝐩 𝐯𝐢𝐬𝐢𝐨𝐧 𝐭𝐨 𝐥𝐢𝐟𝐞 and take it to the 𝐧𝐞𝐱𝐭 𝐥𝐞𝐯𝐞𝐥!

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.