Full-stack engineer and technical product manager with 10+ years building web and mobile applications. I build with React Native, Next.js, Node.js, TypeScript, and AWS. Most recently I was Product Manager at Brock Solutions, leading the modernization of a baggage handling platform for Fortune 500 airlines toward a microservice architecture with AI integration. I shipped The Trick Book to the App Store, a social platform for skateboarders and snowboarders with 200+ users. 18,500 lines of code across 3 codebases (React Native mobile app, Next.js website, Node.js REST API), built solo using AI coding agents. I also design production RAG systems using LangGraph multi-agent architecture and vector databases. Published results: relevance improved from 0.67 to 0.89, hallucinations reduced from 23% to 4%. What I deliver: • Mobile apps (React Native, iOS/Android) • Web apps (React, Next.js, Vue.js) • REST APIs & backends (Node.js, Express, Python) • AI/RAG integrations (LangGraph, vector DBs, LLM APIs) • Cloud infrastructure (AWS EC2, Lambda, Amplify, SAM) • Product management (OKRs, roadmaps, PRDs, user stories) • CI/CD & DevOps (GitHub Actions, PM2, Docker) I write PRDs and the code that implements them. That dual perspective means fewer miscommunications, faster iterations, and products that actually solve the problem. BS in Computer Information Systems, College of Charleston. Product Management certification from General Assembly.

Welcome to my profile! I’m a mobile and AR/VR app development expert with 10 years of experience in the field. I am keen on cutting-edge technologies and helping businesses achieve their objectives. But, as a technical expert, I also embed my unique approach to working with clients: - Solid requirements analysis and elicitation - Offering at least a couple of project scope realization options - Visualization of the possible technical strategy in a format of a demo Recently I’ve been involved in a bunch of AR development researches as a part of my core expertise to stay in touch with new technological insights and keep my professional expertise up to the industry best practices. Besides these, here is a list of bells and whistles I can also provide: Technologies: - iOS, macOS, watchOS, tvOS - ARKit, ARCore, RealityKit, SceneKit - Swift, Objective-C, LiDAR - Kotlin, Java, Dart, C++ - Beacons, Bluetooth, IoT, Location and Mapping Domains: - Retail - Construction and Real Estate - Aviation, Tourism, Travel - Entertainment and Social networking - Marketing and Advertising - Fintech - Insurance - Engineering and Industrial - eCommerce - HoReCa - Transport&Logistics Project types: - Mobile application - Standalone module, Framework, SDK - AR Proof of Concept - Companion mobile app (to comply with an existing web/desktop software) - Demo I’m open to both consultancy and development opportunities. Feel free to get in touch with me and my team if you want to discuss a mobile or AR application idea, I am sure I will have valuable and interesting ideas to share with you!

Full-stack engineer with more than 25 years of experience shipping products across web, mobile, and cloud. Formerly iOS engineer at GOAT and Dollar Shave Club and founder of Flagstick.io, where I built everything from the iOS app to the Go/Postgres backend and AWS infra. I thrive in startup-style environments where speed and quality both matter.

My unique framework + AI tools deliver results 2x faster 🚀 As a Senior UI UX Designer with 8 years of proven success, I design websites, mobile apps & SaaS products that don’t just look great - they convert. Trusted by leading brands like Apple, Zara Lenovo, and Instantly. Achievements 🌟 💎 Solid clients: Apple, Lenovo, Red Bull, Zara, and Telus 💎 8+ years as a Senior and Lead UI UX Designer 💎 100+ successfully completed projects 💎 Boosted add-to-bag conversions by 40% for a global e-commerce brand 💎 Increased sign-ups by 30% for a SaaS platform 💎 Delivered projects across multiple industries: SaaS, AI, Fintech, Real Estate, E-commerce, and Startups What you get 😎 As your UI UX Designer, you get: ✔️ User-centered experiences that make your product intuitive and engaging ✔️ Conversion-driven designs to increase retention, sign-ups, and sales ✔️ Well-structured design process for predictable, high-quality outcomes ✔️ Clear and flexible collaboration to ensure smooth communication ✔️ Scalable solutions built to grow with your business ✔️ Cost optimization by prioritizing impactful features and reducing unnecessary work ✔️ Designs that are ready-to-develop, saving your team time and effort 🎯 Designing Products That Solve Real Problems I focus on results, not just visuals. As your UI UX Designer, I craft experiences that reduce churn, improve engagement, increase activation, and help your product scale. Every decision is made to create tangible business impact and measurable results. 🔧 What I Can Design For you Whether you’re validating an MVP or refining an enterprise-grade SaaS, here’s what I bring as your UI UX Designer: 🌐SaaS & Web Platforms ✔️ Onboarding flows that reduce friction ✔️ Dashboards that make data instantly actionable ✔️ Admin panels with smart navigation ✔️ Cross-role flows (HR, CRM, finance, sales, etc.) 📱 Mobile App UI/UX Design ✔️ iOS & Android (native or hybrid) ✔️ Clean UX for daily usage apps ✔️ UX for wellness, logistics, education, booking, e-learning ✔️ MVP validation & scalable design structure 📊 Dashboard & Data UI ✔️ Data visualization that tells a story ✔️ Role-based dashboards with filters, KPIs, insights ✔️ Responsive, dev-friendly layouts 🧩 Design Systems & UI Kits ✔️ Atomic design principles ✔️ Reusable components & scalable style guides ✔️ Streamlined handoff with detailed Figma files 🧠 UX Research & Strategy ✔️ Competitor analysis ✔️ User goals + business alignment ✔️ Navigation structure, user flows, wireframes ✔️ Low- to high-fidelity prototypes 🌍 Landing Pages & Marketing Sites ✔️ Conversion-optimized layout ✔️ Story-driven structure & CTA design ✔️ Built to convert traffic into action Industries I know Inside-Out 💻 ✔️ Startups & SaaS Platforms: Streamlining workflows and building scalable MVPs ✔️ Enterprise Software: Optimizing dashboards and team workflows for productivity ✔️ AI & Machine Learning Products: Simplifying complex tech with intuitive interfaces ✔️ E-commerce & Fintech: Optimizing user journeys to drive conversions and trust ✔️ Real Estate & Proptech: Building interactive platforms to increase engagement and sales Clients’ feedbacks 🙋 ⭐ “Vitalii really came through for us. His work as a UI UX Designer not only looked amazing but also helped us significantly boost our conversion rates.” – Jorge A. ⭐ “Excellent work, super professional and skilled. Highly recommended for UX, UI and product design.” – Greg T. Process 💪 1️⃣ Discovery & Strategy. Understand goals, audit the current solution, and research competitors. 2️⃣ Wireframes & Flows. Create a structured foundation with clear user journeys. 3️⃣ UI Design. Craft pixel-perfect, branded, responsive interfaces tailored to users. 4️⃣ Developer Handoff. Deliver organized, scalable files with complete design systems. 5️⃣ Validation & Testing. Conduct usability tests and polish designs for real-world performance. As a UI UX Designer, I ensure that the process is clear, efficient, and results-oriented. 👉 Looking for a UI UX Designer? Let’s design a product that people actually use. 📩 Click "Send Message" and tell me what you're working on. Tools 🛠️ Figma (main design hub) FigJam, Miro (flows & collaborative mapping) Adobe Illustrator & Photoshop (supporting visuals) InVision, Marvel App (prototyping) Notion, Slack, Trello, Asana (project management) Key words 🗓️ UI UX Designer, Senior UI UX Designer, Product Designer, SaaS Design, Mobile App Design, Website UX, UX Audit, Conversion Optimization, Dashboard Design, Responsive Web Design, Wireframing, Prototyping, Design Systems, Startup UX, Enterprise UX, AI Product UX, UX Strategy, UI for MVP, Human-Centered Design, UX for Fintech, UX for E-commerce, UX Research, User Flow Optimization, Microinteractions, Design for AI SaaS, Scalable UX, Customer Journey Mapping

Hey 🙋🏻‍♂️, I'm Mustapha, Are you looking for a reliable senior full-stack & mobile developer who delivers clean, production-ready code — on time and on spec? With 8+ years of experience in Symfony, React, React Native, and TypeScript, I build robust REST APIs, scalable SaaS platforms, e-commerce solutions, and iOS & Android mobile apps tailored to your business goals. From architecture design to deployment, I handle the full development lifecycle so you can focus on growing your product with confidence. 📌📌📌 Key Skills 📌📌📌 ☑ Communication ☑ Teamwork ☑ Initiative ☑ Problem-solving ☑ Computer / IT skills ☑ Organisation ☑ Leadership ☑ Hard work and dedication ☑ Creativity ☑ Numeracy ☑ Reliability 📌📌📌 Stack 📌📌📌 ☑ Languages & Frameworks: AI | PHP | Symfony | API Platform | VueJs | React | Next.js | Node | Redux | React Native | Javascript | JSX/TSX | Typescript | Bootstrap | Twig | jQuery | HTML/CSS/SASS/SCSS | BEM | Firebase | GCP | REST API L GraphQL | Figma | Shell Script ☑ Testing: Jest | Cypress | PHPUnit ☑ Methodology: Agile (Scrum) ☑ Patterns & Architectures: MVC | Hexagonal Arch | DDD | SOLID | DRY | KISS | YAGNI ☑ Database: MySQL | MongoDB | Postgres | SQLite ☑ VCS: Git (Gitlab | Github | Bitbucket) ☑ CI / CD: Github Actions | Bitbucket pipelines | Fastlane | Docker ☑ OS & Softwares: Mac / Linux | Android Studio | VSCode | XCode | PHPStorm | Cursor | Claude Code 📌📌📌 Why choose me for your project ? 📌📌📌 ☑ Active listening — I take time to understand your real needs before jumping to solutions ☑ Proactive approach — I bring ideas and suggestions, not just execution ☑ Clear communication — No jargon, no surprises, full transparency at every step ☑ Fast availability — Quick to respond and consistently reachable throughout the project 📩 Contact me to discuss your needs further. ⏳ I respond within 1 hour.

Looking for a backend expert who can build robust web and desktop applications with scalable architecture? I’m a Backend Developer specializing in .NET, C#, Go, and cloud platforms, with 15+ years of experience delivering high-performance solutions. I combine deep technical expertise with practical architecture design, ensuring your projects are reliable, maintainable, and future-ready. - 15+ years of experience in Software Engineering - 4+ years average project duration - I’ve worked across various industries, including Retail, Healthcare, Fintech, and Sports - Created ERP, CRM, POS systems, complex web platforms, and desktop applications. - My experience also covers system architecture, requirements analysis, and deployment pipelines, helping businesses optimize workflows and scale efficiently. - Specialize in full lifecycle development (SDLC) and high-performance solutions with .NET, Go, and React - Design and implement distributed systems, AI-driven applications, cloud-native platforms, - Ensure secure, efficient, and resilient systems, including web portals, APIs, mobile apps, and IoT integrations Core Technologies & Skills: - Languages: C#, TypeScript, Go, C++ - Frameworks: .NET Core, ASP.NET MVC, Tauri, Gin, Avalonia, Blazor - Architecture & Design skills: Solution Architecture Principles, Design Patterns, DevOps and CI/CD Pipelines, Security and Compliance, Integration Architectures, Performance & Scalability Design, Data and Storage Architectures - Databases: Microsoft SQL, PostgreSQL, CosmosDB, Redis, Azure SQL - Front end: React, Next.js, Tailwind - Cloud Services: Azure, AWS, Vercel, Netlify, Supabase - Other: Rust, Docker, PlatformIO, Unity3D, Swift, Augmented Reality, TUI, IoT If you need someone who can turn complex backend requirements into scalable, high-performance applications, I’ll help bring your project to life. Explore my portfolio of projects delivered with my team at MobiDev, helping businesses across North America and Europe achieve their software goals.

React and Ruby On Rails expert designing full stack web applications using AWS and Firebase, as well as many other modern technologies. Experienced in building scalable systems serving 1,000,000+ users. Passionate about writing high quality code that is easily understood and scalable. The best line of code is one that can be removed. The best library is one that can be replaced with a native API.

Over the last 11+ years, I build and scale full-stack AI-powered web applications and SaaS platforms, focused on taking ideas from early concept to stable, production-ready systems that are fast, maintainable, and built to last. My work covers the full stack from frontend applications built with React and Next.js to backend systems using Node.js, Python, and Go. I build APIs, design backend services, and structure data using PostgreSQL and MongoDB, with a focus on keeping systems simple, scalable, and easy to work with as they grow. On the infrastructure side, I work with AWS, Docker, and CI/CD pipelines to deploy and operate applications in production. I also get involved in system design decisions, especially when it comes to performance, scalability, and reducing unnecessary complexity in existing systems. AI Development: I add AI capabilities into real products where they actually make sense - things like LLM-based features, automation, and workflow improvements. The goal is not experimentation, but building features that fit cleanly into the product and deliver real value to users. I’ve worked on both new builds and existing systems, including refactoring codebases, improving performance, and shipping features in live environments without disrupting stability. Good fit if you're: • Building an AI-powered SaaS or web application • Looking to add LLM features (OpenAI, Anthropic, or self-hosted models) into a product • Scaling something that’s starting to become slow, complex, or hard to maintain • Need someone who can work across both product and engineering decisions without overcomplicating things Let's talk! Stack: JavaScript, React, Next.js, Node.js, Python, Go, TypeScript, REST APIs, GraphQL, PostgreSQL, MongoDB, AWS, Docker, CI/CD

I turn ideas into working products. I translate business strategy into scalable, production‑grade systems. I’m an architect‑first, hands‑on builder who owns the stack end to end. I partner with non‑technical, business‑savvy leaders as the technical lead. I leverage AI tools to supercharge delivery—accelerating specs, code, tests, and iteration—while maintaining clear architecture, reliability, and cost control. Hands‑on keyboard: I architect, design, build, improve, and iterate your product end to end—until it’s right or the budget says stop. I do apps, websites, platforms, and APIs. I primarily build with AWS, Next.js, and Swift, applied pragmatically to the problem at hand. I’ve shipped a long list of production systems and keep improving them after launch. Open to quick, high‑impact engagements within my skillset.

Building Robust, Secure Web and Mobile Products - Technical Partner / Full-Cycle Team ברוך השם I observe Shabbat (offline Fri sunset - Sat night) and plan timelines and communication accordingly. I build scalable, user-centric digital products for startups, SMBs, and organizations that care about reliability, privacy, and long-term support. I frequently work with US- and Israel-based founders, and I support Jewish-led businesses and Jewish community organizations where trust, discretion, and predictable delivery matter. Expertise - Frontend: React, Next.js, Vue, Angular - Backend/API: Python (Django, FastAPI), Node.js (NestJS, Express), PHP (Laravel) - Mobile: Flutter, React Native - Database/Cloud: PostgreSQL, MongoDB, Firebase, AWS, Docker, CI/CD - Integrations: REST, GraphQL, Stripe/payment flows, subscriptions, CRM, automation, AI features Why clients hire me - Full-cycle delivery - from discovery and UX/UI to deployment and maintenance - Security-first approach - HIPAA/GDPR-ready practices when needed - Clear milestones and transparent reporting (fixed price or T&M) - Proven track record - 150+ projects across fintech, healthcare, logistics, marketplaces, and membership platforms Message me with your product, current stage, and target timeline - I’ll reply with a practical plan and next steps.