Senior Mobile App Developer with 6+ years of experience specializing in iOS development using Swift and SwiftUI. Founder of multiple tech startups and independent designer and developer of 15+ mobile applications, most of which are currently available on the App Store.

Seeking an outstanding app developer for your project? I have been delivering exceptional products for 8 years and I’m sure I can help you. My attitude: ✓ customer needs are the priority; ✓ your business growth is our common goal; ✓ requirements are discussed before implementation; ✓ regular clear communication is a must; ✓ delivering scalable, secure, and flexible apps; ✓ excellent understanding & implementation of UI/UX design components. My expertise: ✅ Fintech Apps development; ✅ Healthtech Apps development; ✅ Edtech Apps development; ✅ POS Apps development; ✅ Web and Mobile development; ✅ Android, iOS, Cross-Platform, React, Angular, Next, Spring, Spring Boot development; ✅ Secure solutions that work with sensitive data. Why me? ✨ 8 years of proven experience in mobile development; ✨ Top 3% of freelancers on Upwork – Top Rated Plus; ✨ 100% Job Success Rate; ✨ 35 successfully delivered projects; ✨ Reliable partner for your business. Have any questions or want to discuss your ideas? Feel free to write me!

✅ +5 Years of Experience ✅ Top Rated Freelancer ✅ 100% Job Success ✅ 100% Client Recommendation Rate ✅ +2000 Hours Worked Hello! I'm Joe, a dedicated Software Developer with over 4 years of experience in developing web and mobile applications. My expertise lies in delivering solutions that are not only visually captivating but also highly functional, ensuring a seamless user experience. ✨ My Services: Full-Stack Web & Mobile App Development Custom Software Solutions API Development & Integration Database Design & Management Performance Optimization Bug Fixing & Code Refactoring Continuous Integration & Deployment 🛠️ Technologies & Tools: Front-end: React, Angular, NextJs Back-end: Node.js, PHP (Symfony), Java (Spring Boot), Python (Django) Mobile: React Native, Flutter, Flutter Flow Database: MySQL, MongoDB, PostgreSQL, MSSQL, Neo4j DevOps: CI/CD setup, Git, Jenkins, Nexus, Docker, Grafana, Prometheus,AWS, Azure Version Control: Git, GitHub, Gitlab, Bitbucket 🔍 Why Choose Me? Quick and Agile Development Processes Commitment to Quality and Best Practices Proactive Communication and Regular Updates Adaptive to Project Changes and Requirements Strong Focus on User Experience and Performance Comprehensive Testing and Debugging I am passionate about leveraging the latest technologies to build solutions that not only meet but exceed your expectations. Whether you're starting a new project or looking to improve an existing one, I have the skills and experience to bring your vision to life. Let's connect to discuss how we can turn your ideas into reality. Your success is my priority, and I am here to ensure your project's success. Keywords: Software Development, Web Development, Mobile App Development, Full-Stack Developer, React, Angular, Node.js, Ruby on Rails, React Native, Flutter, MySQL, MongoDB, AWS, Docker, User Experience, Technology.

I help businesses automate slow, manual work with custom mobile apps What I do: - Native iOS development (Swift, SwiftUI, UIKit) - Cross-platform when you need both stores (React Native, Kotlin Multiplatform) - Backend & API integration, in-app purchases - MVPs, App Store release & optimization Feel free to message me if you think I fit any of your projects!

You need a mobile developer who doesn’t just write code - but builds apps that are fast, stable, and ready to grow with your business. Whether you're launching a new product or modernizing an existing one, reliability, performance, and clean architecture aren’t optional - they’re critical to success. That’s where I come in. I specialize in iOS and Android app development that aligns with your product vision and scales seamlessly. My clients value me for delivering: ✔️ High-performance mobile apps built with modern, maintainable code ✔️ Reliable delivery - on time, every time ✔️ Clear communication and proactive collaboration ✔️ Clean architecture ready for growth, feature extensions, and handoffs ⚙️ My Process From discovery to delivery, I work closely with product teams and founders to: 1. Understand user flows, key features, and backend needs 2. Choose the right tech stack (native or cross-platform) 3. Build scalable, well-structured apps with clean UI and strong UX 4. Integrate with APIs, analytics, notifications, auth, payments, and more 5. Test, deploy, and support post-launch improvements 🛠️ Tools & Technologies Mobile: Swift, Kotlin, Flutter, React Native, Java, Obj-C, MAUI, C# Frontend: SwiftUI, Jetpack Compose, HTML5/CSS3, React Backend & APIs: Node.js, Python, PHP, .NET, FastAPI, Next.js Databases: Firebase, PostgreSQL, MySQL, SQL Server, MongoDB, Redis In-Demand Keywords: Mobile App Development, iOS Development, Android App Development, API Integration, User Authentication, In-App Purchases, Full Stack Development, JavaScript, Web Development, Cross-Platform Apps

I build AI systems that hold up in production, and I've been an engineer for 18+ years, an engineering leader for most of the last decade. I co-founded a venture-backed SaaS platform, ran its engineering as VP for nine years, and helped raise over $20M. These days I work as a fractional CTO and hands-on AI engineer. I still write the code. Most of my recent work is AI agents and retrieval systems, specifically the parts that get hard once you leave the demo behind: holding latency and cost down, grounding answers in real data instead of letting the model guess, evaluating quality so you actually know when a change made things worse, and getting permissions right so the system never answers from a document the user was never allowed to see. Recent work I've built or architected: - A governed AI operating system for an enterprise retail and fashion brand, running entirely inside the client's own Google Cloud tenant. Sole delivery engineer: the full Terraform infrastructure (AlloyDB/pgvector, Cloud Run, IAM, Secret Manager, VPC Service Controls), a canonical data layer ingesting six external systems with PII masking at ingestion, a suite of Claude-powered agents behind a deterministic policy gate enforcing brand and commercial rules, a 50-case eval harness with per-run cost accounting, and a Next.js leadership app, all engineered for the client to own and operate after handover. - An AI-augmented delivery pipeline (spec-driven, agent-run against a ticket backlog) that shipped 200+ fixes and features in a single month with very little direct developer time. - Production AI agents with real cost management, not a prototype that quietly burns the budget. - A multi-agent, character-led knowledge assistant: distinct specialists, a routing layer, retrieval grounding, and guardrails, all behind one interface. - Enterprise RAG architecture: document-readiness assessment, hybrid retrieval and reranking, GraphRAG for relationship questions, adaptive routing, and evaluation gated in CI. Before AI ate my calendar I shipped plenty of other things: an LMS with SCORM, a website builder with a large user base, event booking, commerce, enterprise chat, TV apps, mobile games. EdTech and SaaS are home turf. Working with me, you get someone who'll architect the thing and then build it, who'll tell you when the simpler approach is the right one, and who measures whether the AI is working rather than trusting the vibes. Stack: TypeScript and JavaScript end to end. React, React Native, Next.js, Node, NestJS, Express, GraphQL, serverless. AWS (Solutions Architect certified) and GCP, Docker, EKS, Terraform. Postgres, MySQL, MongoDB, DynamoDB. Prisma, TypeORM, Apollo. Heavy on testing: Jest, RTL, Playwright, Cypress, full e2e suites. PMP on the delivery side. Open to fractional CTO, tech lead, and senior build engagements, large or small. Tell me what you're stuck on and I'll tell you straight whether and how I can help.

I help founders and product teams ship native iOS/macOS/watchOS apps AND embed AI that actually works in production. 9+ years building Swift/SwiftUI products, 15+ App Store launches, and now a growing track record integrating LLMs, RAG, and on-device ML into real apps. ──────────────────────────────────────── 🤖 AI CONSULTATION & INTEGRATION ──────────────────────────────────────── • AI strategy calls — pick the right model, estimate cost, scope an MVP • OpenAI / Anthropic Claude / Gemini API integration (chat, tools, vision) • RAG pipelines: embeddings, vector DBs (Pinecone, pgvector, Weaviate) • On-device ML: CoreML, Vision, Apple Intelligence, Foundation Models • Voice agents, transcription (Whisper), TTS, real-time multimodal • "Vibe-coded" prototype rescue — turn AI-generated spaghetti into shippable code • AI features inside existing iOS apps without breaking UX or App Review • Prompt engineering, evals, guardrails, prompt caching for cost control • MCP servers, Claude Agent SDK, custom tool-using agents • Fix ai slop and cleanup product ──────────────────────────────────────── 📱 NATIVE iOS / macOS / watchOS ──────────────────────────────────────── Languages: Swift 6, SwiftUI, Objective-C, async/await, Combine Architecture: MVVM, TCA, VIPER, Clean Swift, modular SPM iOS 26 ready: Liquid Glass, new design system, Foundation Models Storage: SwiftData, CoreData, Realm, GRDB Networking: REST, GraphQL, WebSockets, SSE, Alamofire Real-time: WebRTC, CallKit, PJSIP, SIP/VOIP, XMPP Hardware: CoreBluetooth (BLE), NFC, CoreLocation, Camera, ARKit Extensions: Widgets, Live Activities, Siri Shortcuts, App Clips, watchOS Security: Keychain, biometrics, OpenSSL, certificate pinning Payments: Apple Pay, In-App Purchase, RevenueCat, Stripe, ACH ──────────────────────────────────────── 🧰 WORKFLOW ──────────────────────────────────────── CI/CD: Fastlane, Xcode Cloud, GitHub Actions, TestFlight PM: Jira, Linear, Notion · VCS: Git/GitHub/GitLab Quality: XCTest, snapshot tests, Sentry, Firebase, Mixpanel ──────────────────────────────────────── 🎯 BEST FIT IF YOU NEED ──────────────────────────────────────── • A senior iOS lead who can also own the AI layer end-to-end • Rescue of a vibe-coded / AI-generated iOS codebase • iOS 26 / Liquid Glass redesign of an existing app • Adding ChatGPT-style features, voice, chat or RAG inside a native app • A 30-min consultation before you commit budget — I'll be honest about whether you actually need AI, or just better UX Let's chat — I reply within a few hours and usually have a clear scope and estimate by the end of our first call.

Cloud Security & DevSecOps Engineer for teams running on AWS, Azure, GCP, BigQuery, ETL, and CI/CD. I help teams secure cloud infrastructure, data pipelines, and deployment workflows without slowing engineering down. That includes IAM, Entra ID, vulnerability assessment, security analysis, CI/CD hardening, DevSecOps, and information security work across the full environment. Most clients come to me when things already feel messy. Access is too open, cloud infrastructure has grown without clear security rules, CI/CD is moving fast without enough guardrails, and nobody is fully sure where the real risk is. That is exactly why they hire me. I do not just point out issues. I work on the actual infrastructure, access model, cloud setup, and delivery flow so your team can reduce risk, stay organized, and keep shipping with more confidence. 𝙎𝙚𝙧𝙫𝙞𝙘𝙚𝙨 𝙄 𝙊𝙛𝙛𝙚𝙧: 𝟭. Cloud Security Reviews: I review cloud infrastructure, identity, networking, permissions, workloads, and data flows to find real security gaps and give clear priorities. 𝟮. DevSecOps & CI/CD Security: I secure CI/CD workflows so teams can build, test, and deploy with better controls, fewer mistakes, and less production risk. 𝟯. IAM & Entra ID Hardening: I improve IAM, Entra ID, roles, permissions, least privilege, and access design so the right people get the right access without unnecessary exposure. 𝟰. Vulnerability Assessment: I run vulnerability assessment work, validate findings, remove noise, and help your team focus on what actually matters. 𝟱. Security Analysis: I break down risks in plain English so leadership, engineering, and operations can understand what is wrong, what matters most, and what to fix first. 𝟲. Cloud Infrastructure Security: I help secure infrastructure in AWS, Azure, and GCP, including compute, networking, storage, identity, and deployment patterns. 𝟳. Data Engineering & ETL Security: I support secure ETL flows, BigQuery environments, and data architecture decisions where access, movement, storage, and control of data matter. 𝟴. Information Security Support: I help teams improve their information security setup with practical controls, documentation, clearer ownership, and cleaner processes. 𝟵. Quality Assurance for Security Changes: After fixes are made, I verify that the changes actually work and that the environment is more secure, stable, and easier to manage. 𝙏𝙝𝙚 𝙠𝙞𝙣𝙙 𝙤𝙛 𝙬𝙤𝙧𝙠 𝙄 𝙝𝙚𝙡𝙥 𝙢𝙤𝙨𝙩 𝙬𝙞𝙩𝙝: 🔹 Securing AWS, Azure, and GCP environments without slowing down delivery 🔹 Hardening IAM, Entra ID, permissions, and access controls 🔹 Improving CI/CD security and building cleaner DevSecOps workflows 🔹 Running vulnerability assessment and turning findings into real fixes 🔹 Securing ETL pipelines, BigQuery environments, and data infrastructure 🔹 Helping engineering teams understand and reduce cloud security risk 🔹 Cleaning up weak infrastructure and making it easier to maintain over time 🔹 Supporting information security work with practical implementation, not theory 𝙄 𝙖𝙢 𝙚𝙭𝙥𝙚𝙧𝙩 𝙖𝙩: 𝟭. Cloud Security, CI/CD Security, CyberSecurity, Information Security, DevSecOps 𝟮. Azure, AWS, and GCP, Docker, Kubernetes 𝟯. Vulnerability Assessment, Cloud Infrastructure, Security Analysis 𝟰. Azure, AWS, and GCP, Docker, Python 𝟱. BigQuery, ETL, and Data Engineering 𝟲. IAM, Entra ID, SOC, SOC2, ICO Thanks for reading my bio, I am happy to help you, just send me a message and we can discus everything in more detail.

I'm a Mobile App Developer with strong experience in developing high-performance Android and iOS applications using modern mobile technologies. Skilled in building responsive UI, integrating APIs, managing app deployment, and optimizing application performance for scalable mobile solutions. I specialize in developing cross-platform mobile applications using React Native and Flutter, delivering smooth, scalable, and user-friendly experiences for both Android and iOS platforms. With hands-on expertise in Firebase services, REST API integration, state management, authentication systems, push notifications, cloud databases, and real-time features, I build applications that are reliable, secure, and production-ready. I focus on writing clean, maintainable code and creating modern UI/UX designs that enhance user engagement and performance. From startup MVPs to enterprise-level applications, I can handle the complete mobile app development lifecycle including planning, development, testing, debugging, deployment, and post-launch support. My expertise includes: - Cross-platform mobile app development (Android & iOS) - React Native & Flutter app development - Firebase integration (Auth, Firestore, Realtime DB, Cloud Functions, FCM) - RESTful API & third-party SDK integration - Responsive and pixel-perfect UI implementation - App performance optimization & bug fixing - State management (Redux, Provider, Bloc, GetX, Riverpod) - Payment gateway integration - Google Maps & location-based services - Push notifications & real-time chat features - App Store & Google Play deployment - Maintenance, updates, and long-term support I am committed to delivering high-quality mobile applications with clean architecture, efficient performance, and excellent communication throughout the project. Whether you need a new mobile app from scratch, feature enhancements, UI improvements, or bug fixing, I can help turn your ideas into fully functional mobile solutions.

I'm a UX designer and web developer with 14 years of experience working with universities and corporations — now bringing that same level of craft and professionalism to startups, small businesses, and independent founders. I design with intention and build with care. My work spans responsive web development, mobile app development (iOS and Android), and UX/UI design — so I can take a product from concept to launch without handoff gaps slowing things down. For smaller teams and growing businesses, that kind of end-to-end ownership is often exactly what's needed. You bring the vision — I bring the skills to make it real. Whether you have a fully fleshed-out idea or just a strong sense of what you want to build, I'm here to execute on it. No need to translate your thinking into technical language — I'll meet you where you are and take it from there. Most recently, I independently designed, built, and shipped Camera Vault, a native mobile app available on both the App Store and Google Play — handling everything from UX and branding to release management on both platforms. Who I work best with: -Independent founders and startups moving from idea to launch -Small businesses that need a trusted design and dev partner, not an agency -Clients who value quality and want someone who takes ownership If you have a project that needs to get done right, I'd love to work with you.