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iOS Developer | 10 years of experience I develop high-performance iOS applications. For the last decade, I have worked in outsourcing companies, delivering reliable and maintainable solutions. I ensure that every project follows best coding practices, making future maintenance and scaling easier. Key Skills: 🔹 Swift, Objective-C, SwiftUI, UIKit 🔹 CoreData, REST API, Firebase 🔹 Development patterns: MVVM, VIPER, MVP, Clean Architecture Expertise & Services: 🔹 Building iOS apps from scratch 🔹 Improving UI/UX & animations 🔹 Optimizing performance & fixing issues 🔹 Integrating APIs & backend services 🔹 Setting up CI/CD & automation How I Work: 🔹 For large tasks, I break work into subtasks for better tracking. 🔹 If required, I send daily reports detailing completed work and next steps. 🔹 I follow existing coding standards in projects. If none exist, I follow a clean and consistent code style to improve maintainability. Pricing & Work Approach: 🔹 I prefer fixed-price projects with milestone payments for structured development. 🔹 For larger projects with unclear scope, I work hourly to ensure flexibility. 🔹 Open to discussing the best pricing model for each project. Feel free to contact me to discuss your project.

12 years of iOS development: I have a very diverse experience + some extra skills in geolocation and delivery apps, audio processing, and Bluetooth devices. I used to work with Objective-C and several earlier versions of Swift. Now I'm coding in the latest Swift 5.9. My core skills: ✅ Dependency management (Carthage, Cocoa Pods, Swift Package Manager) ✅ Database frameworks (Realm, Core Data, Firebase) ✅ Networking implementation (Alamofire, NSURLSession) ✅ Clean architecture ✅ Code versioning (Git) Some extra skills: ✅ Audio synthesis and processing (AudioKit) ✅ Geolocation and Map services (Google Maps, MapKit) ✅ Payment integration (Stripe) ✅ Bluetooth connectivity A few words about myself: I'm a 34-year-old iOS Developer from Siberia, freelancing since 2020. I'm playing an electric guitar on the side and collecting music devices. Married and raising a 5-year old. I’m always open to new challenges, whether you have a short or long-term project.

Experienced iOS Developer | Long-term Availability | Fix bugs | Testing Skilled in: • SwiftUI, UIKit • Combine • Core Data, Core Location • AVFoundation • RealityKit, ARKit, SceneKit • WidgetKit • RESTful API • Git • Firebase • AutoLayout • GCD • XCTests • MVVM, VIPER Architecture Patterns Why Choose Me? Expert in iOS Development: I specialize in building high-quality, scalable, and user-friendly iOS applications using Swift, SwiftUI, and UIKit. Passionate About Problem-Solving: Whether it's fixing critical bugs, optimizing performance, or implementing new features, I thrive on making apps better. Reliable & Detail-Oriented: I ensure clean, maintainable code and follow best practices to deliver efficient and high-performing apps. Seamless Communication & Long-Term Collaboration: I believe in transparency, clear communication, and long-term partnerships to help businesses succeed. Looking forward to possibility of contributing to your product success! Best regards, Zhasmina Dybysbay

$300k+ earned on Upwork • 50+ successful projects • 11,000+ logged hours I specialize in taking over existing mobile projects and helping teams ship reliable products. My strength is quickly understanding complex codebases, solving difficult production issues, improving architecture, optimizing performance, and preparing applications for successful App Store and Google Play releases. I contribute effectively as an individual developer, Tech Lead, or part of an existing engineering team. I have over 20 years of software development experience, including 10+ years building native iOS and Android applications and 7+ years developing cross-platform apps with Flutter and React Native. My experience includes startups, enterprise products, and large-scale mobile platforms serving hundreds of thousands to over one million users. I've worked on marketplaces, social networks, fintech products, delivery platforms, education systems, location-based applications, messaging platforms, and AI-powered mobile solutions. What I can help with • Flutter development (iOS & Android) • React Native development • Native iOS (Swift, SwiftUI, Objective-C) • Native Android (Kotlin, Java) • Backend development (Node.js, NestJS) • Firebase (Authentication, Firestore, Cloud Functions, Storage, FCM) • REST APIs, WebSockets, WebRTC • Architecture improvements • Performance optimization • Production bug fixing • Code refactoring • Technical audits & code reviews • App Store & Google Play releases • Team leadership & mentoring AI & Computer Vision I also build AI-powered mobile features and backend-connected AI workflows, including: • OpenCV • YOLO-based object detection • Image processing pipelines • AI-assisted mobile features • Backend AI integrations • Modern LLM integrations Technologies Flutter • React Native • Dart • Swift • SwiftUI • Objective-C • Kotlin • Java • Node.js • NestJS • Firebase • Firestore • PostgreSQL • REST APIs • WebSockets • WebRTC • OpenCV • YOLO • Clean Architecture • MVVM • MVP • SOLID Why clients work with me ✔ Fast onboarding into existing projects ✔ Strong experience with large production codebases ✔ Architecture improvements instead of temporary fixes ✔ Production-first mindset ✔ Clear communication and transparent progress ✔ Reliable delivery and predictable execution ✔ Comfortable working independently or leading engineering efforts If your project needs an experienced engineer who can quickly understand an existing codebase, solve complex technical challenges, and help deliver a stable, production-ready application, I'd be happy to discuss how I can help.

🫵 Need a senior iOS & macOS engineer who can take your product from idea to App Store – and keep it fast, stable, and maintainable as it grows? 🏆 Key Highlights • 7+ years of deep, hands-on experience building and scaling complex iOS & macOS applications in real production environments. • Senior-level architecture & coding: MVVM, VIPER, Clean Architecture, modular design, dependency injection, SOLID – I design codebases that stay clean and extensible for years, not months. • Deep focus on quality and performance: crash reduction, memory/CPU optimization, complex UI and heavy lists, smooth animations, and profiling with Instruments. • Solid experience with complex integrations: secure payments, authentication/authorization, offline modes, background sync, advanced navigation and routing, analytics, and monitoring. 📱 What I Do Best • End-to-end product delivery • Strong, scalable architectures • Performance & stability engineering • Legacy rescue & modernization ⭐ What Makes Me Different • Production first, not demos – I work with real users, real traffic, and real constraints, focusing on reliability, performance, and maintainability instead of “just working on my machine.” • Engineering with standards – systematic crash reduction, profiling with Instruments, careful Core Data / storage optimization, and attention to edge cases and failure modes. • Architecture as a long-term asset – I design modular, testable systems that keep your future changes safer, faster, and cheaper, regardless of team size. 💼 Experience Areas • Fintech & banking • Payments & loyalty platforms • Marketplaces • Cloud storage • Maps & geolocation • Health & wellness • Media-heavy applications • macOS productivity tools 🔄 How I Work I start by clarifying goals, constraints, and edge cases. Then I propose a clear implementation plan with milestones, risks, and trade-offs upfront. I deliver in short, transparent iterations with production-ready standards, clean code, and predictable results. Comfortable working async with distributed teams or integrating smoothly into existing workflows. ☑️ Core Skills & Technologies 1) Apple Platforms • iOS, macOS • Swift, SwiftUI, UIKit, AppKit • Auto Layout, XIB-based interfaces 2) Architecture • MVVM, Clean Architecture, VIPER, Coordinator • Dependency Injection, modular design • SOLID principles 3) Concurrency & Performance • async/await, Combine, RxSwift, GCD, OperationQueue • Instruments profiling (time, memory, CPU, allocations) • Performance tuning, memory & CPU optimization 4) Data & Offline • Core Data, Realm • Caching strategies, background sync, conflict resolution • Large media handling (photo / video) 5) Networking • REST APIs, OpenAPI / Swagger-style contracts • URLSession, Alamofire • Pagination, retry / backoff strategies, response caching 6) Security • Keychain, secure token storage • Session management, OAuth / JWT-based auth flows • Banking-grade client security practices 7) Analytics & Monitoring • Firebase (Auth, Firestore, Storage, Analytics) • Sentry, Crashlytics • Production debugging & observability 8) CI/CD & Release • Fastlane, TestFlight, App Store Connect workflows • Code signing & provisioning • Git-based CI/CD pipelines 9) Quality & Maintainability • XCTest (unit & UI tests) • Code reviews, refactoring • SwiftLint, SwiftFormat, clean coding standards 10) Advanced Topics • ML & Computer Vision integrations • ARKit basics • Algorithmic problem solving • Maps, routing logic, geospatial features 📩 Ready to move fast without sacrificing quality? Invite me to your job on Upwork - I’ll help you turn complex requirements into a stable, scalable Apple-platform product. Last updated: January 2026

I build production geospatial applications - from interactive MapLibre/Mapbox interfaces and GIS dashboards to Python/PostGIS data pipelines, spatial analytics, location intelligence, and geospatial APIs. I'm a Mapbox Developer Network Expert and senior geospatial software engineer with 10+ years on Upwork, $300K+ earned across 95 projects, 7,000+ hours, 100% Job Success, and Top Rated Plus status. My work typically involves one or more of these areas: INTERACTIVE WEB MAPPING MapLibre GL JS, Mapbox GL JS, Leaflet, Deck.gl, Google Maps API, ArcGIS JS API, custom vector/raster layers, complex map interactions and data visualization. SPATIAL ANALYSIS & LOCATION INTELLIGENCE PostGIS, GeoPandas, Shapely, Turf.js, proximity and catchment analysis, spatial joins, scoring models, demographic/POI analysis, and site-selection workflows. GEOSPATIAL DATA ENGINEERING Python, GDAL/OGR, pandas, large vector/raster datasets, ETL pipelines, data normalization, tiling, PMTiles, GeoJSON, and automated data-processing workflows. BACKEND & INTEGRATION PostgreSQL/PostGIS, REST APIs, Docker, cloud deployments, third-party data services, and integration of geospatial functionality into existing web platforms and applications. FRONT-END DEVELOPMENT JavaScript/TypeScript, Vue.js, React, responsive interfaces, dashboards, charts, filters, and data-driven UI. I’m especially useful on projects where mapping is not just a visual add-on, but an important part of the product or decision-making workflow. I can join an existing codebase, investigate and improve an inherited system, or build a geospatial application from the ground up. I’m comfortable working independently, translating product requirements into technical architecture, and communicating clearly with both technical and non-technical stakeholders. If your project involves maps, spatial data, location intelligence, PostGIS, geospatial APIs, or complex GIS workflows, I’d be happy to discuss it.