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I’m an experienced Mobile Engineer & Team Lead with 11+ years of expertise in Android and iOS development, delivering apps that have reached millions of users worldwide. Over the years, I’ve built, scaled, and maintained enterprise-grade apps as well as specialized custom solutions, with a strong focus on performance, clean architecture, and modern mobile best practices. What I Do Best: Mobile Development (Android & iOS) – Expert in Android (Kotlin/Java) and experienced in iOS (Swift/SwiftUI), building high-quality, production-ready applications across both platforms. Strong knowledge of Jetpack, coroutines, Hilt/Dagger, Room, Navigation, RxJava, Firebase, and App Store / Play Store guidelines. App Architecture & Performance – Scalable MVVM/MVI architectures, optimized UI patterns (RecyclerView, ViewPager2), efficient state management, robust caching, and offline-first strategies. Authentication & Security – OAuth2, token refresh flows, secure storage, deep linking (Branch), push notifications (FCM/APNs), and analytics integrations (MoEngage, Firebase). Team Leadership – Currently serving as Engineering Lead (Mobile), mentoring developers, driving architecture decisions, and ensuring delivery under tight timelines. What You Can Expect: ✔️ Fast & reliable delivery – I prioritize hitting deadlines without compromising quality. ✔️ Clear communication – Regular updates, proactive suggestions, and collaborative problem-solving. ✔️ Long-term value – I don’t just build apps; I help you plan for scale, stability, and future growth. ✔️ Hands-on expertise – Whether fixing urgent production crashes, building new features, or leading full app development, I take ownership until the job is done right.

Hands-on mobile app developer with more than 10 years experience. Capable of deciding which architecture to use on specific project and love to give opinion plus suggestion if needed. Have advantage than other flutter's developer since I've have native language skill (Swift, Kotlin, Objective-c, Java). Love to explore various framework and technology to serve the app with better performance so that customer will experience smooth buttery app.

Expert Full Stack Developer | Fractional CTO | Expert React.JS Developer | Expert Full-Stack Developer | Fractional CTO | Python | JavaScript | Django Hi, I’m 𝐅𝐚𝐡𝐚𝐝 𝐈𝐪𝐛𝐚𝐥 , a Senior Mobile Developer, Backend Engineer, and Solution Architect with 14+ years of experience building high-performance iOS, Android, and cross-platform applications using Swift, Kotlin, Flutter, Python, and Laravel. I help startups, enterprises, and government organizations design, build, and scale secure, AI-powered mobile and backend solutions with clean architecture, real-time integrations, and seamless user experiences. My expertise spans across mobile app development, API engineering, AI/ML integration, and DevOps automation. ✅ I also provide Fractional CTO Services to my Clients: - Fractional CTO - Technical Advisor - Technical Consultant - Solution Architect - Enterprise Software Architect - Technical Project Manager - Senior Product Manager - Product Delivery Expert 𝐌𝐲 𝐬𝐭𝐫𝐨𝐧𝐠 𝐬𝐢𝐝𝐞 𝐚𝐬 𝐚 𝐒𝐞𝐧𝐢𝐨𝐫 𝐟𝐮𝐥𝐥 𝐬𝐭𝐚𝐜𝐤 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫: ✅ Front-end: TypeScript, JavaScript, React, Frontend React, React Native, Vue, Redux, Zustand, MobX, GraphQL, HTML5, CSS3 (with Sass, Bootstrap, MaterialUI, Styled-components, Flex, and Grid), Three.js, etc. ✅ Back-end: Node.js, Next.js, Nest.js, Express, Fastify, PHP, Laravel, Java. ✅ Databases: Postgres, MySQL, Redis, MongoDB. ✅ C# Azure Func­tion App for enterprise services. ✅ 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: AVP Mobile Engineer / Assistant Vice President (Mobile) Senior Mobile App Developer (iOS & Android) Full Stack Mobile & Backend Developer Flutter Developer Native iOS Developer (Swift, SwiftUI) Native Android Developer (Kotlin) Cross-Platform Mobile Developer Backend Developer (Python, Laravel, Node.js) RESTful API Developer Secure App Architect (GDPR, PCI-DSS, PSD2) Agile Technical Project Lead CI/CD Pipeline Engineer (Bitrise, Jenkins, GitHub Actions) Enterprise Mobile Consultant Banking App Development Expert AI Integration Engineer (Image Recognition / ML) ✅ Tools & Technologies I Specialize In: 🔹 Mobile & Cross-Platform: Swift, Kotlin, SwiftUI, Flutter, React Native, Objective-C, Android SDK, Xcode, Android Studio 🔹 Backend & APIs: Python, Laravel (PHP), Node.js, .NET, RESTful APIs, Firebase, SQL, MySQL, PostgreSQL 🔹 CI/CD & DevOps: Bitrise, Jenkins, GitHub Actions, Fastlane, Sourcetree, Git, Docker (basic), Firebase Crashlytics 🔹 Architecture & Methodologies: MVVM, MVI, VIPER, Clean Architecture, Agile (Scrum, Kanban), SDLC, Secure Development Lifecycle 🔹 Security & Compliance: End-to-End Encryption, GDPR, PCI-DSS, PSD2, Data Masking, Secure Storage, Role-Based Access 🔹 Project & Collaboration Tools: Jira, Confluence, Bitbucket, GitHub, Slack, Trello ✔ Whether you need a full app, an AI-powered feature, or a trusted technical lead, I’m here to help you launch with confidence.✔ Best Regards, 𝐅𝐚𝐡𝐚𝐝 𝐈𝐪𝐛𝐚𝐥 Full Stack Engineer, Django, AI Full Stack Engineer, Full Stack Programmer, Python, Full Stack Developer, Full Stack Specialist, Full Stack Python Developer, Full Stack Django Developer, Full Stack Django Developer, Fractional CTO, Python, JavaScript, Django, Full Stack Mobile App Developer, Full Stack Engineer, AI Full Stack Engineer, Software Application Development, Software Engineer, Senior Software Engineer, Full Stack AI Engineer, Full Stack Python Developer, Software Engineer, Full Stack Developer, Python Engineer, Full Stack Mobile App Developer, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Full Stack Engineer, Django, AI Full Stack Engineer, Full Stack Programmer, Python, Full Stack Developer, Full Stack Specialist, Full Stack Python Developer, Full Stack Django Developer, Full Stack Django Developer, Fractional CTO, Python, JavaScript, Django, Full Stack Mobile App Developer, Full Stack Engineer, AI Full Stack Engineer, Software Application Development, Software Engineer, Senior Software Engineer, Full Stack AI Engineer, Full Stack Python Developer, Software Engineer, Full Stack Developer, Python Engineer, Full Stack Mobile App Developer, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI Architect, Fractional CTO, Senior AI Engineer, Senior Solution Architect, Senior AI

I architect, develop & deploy production-grade full-stack software platforms, MVPs, multi-tenant AI-native SaaS products, cross-platform web/mobile/desktop applications, and data-intensive backend systems for startups and enterprises across regulated industries. I’m [expert-vetted] Senior Full Stack Developer (AI Architect) with 'traceable performance records' across Fortune 500 enterprises & startups covering: system architecture, full-stack development, AI integration, database design, API development, cloud deployment, production launch, and ongoing O&M support. I’ve delivered numerous custom software platforms, products, and applications, including AI platforms, SaaS products, MVPs, web applications, mobile applications, desktop applications, subscription-based AI SaaS platforms, and enterprise-grade software systems. I usually step in at the stages that matter most: functional mapping, infrastructure and architecture setup, MVP delivery, feature expansion, system modernization, data migration, AI integration, performance optimization, cloud deployment, production launch, and ongoing support. My work usually starts with one of four business problems: building an MVP from scratch, scaling a product that has found traction, modernizing a legacy platform, or integrating AI into an existing system without disrupting core operations. From there, I design the right path across product architecture, data architecture, integrations, infrastructure, testing/UAT & production rollout. I’ve delivered standalone & API based single-tenant/multi-tenant systems, including production-grade AI-native SaaS platforms, LMS, CRM, ERP, payment platform, marketplace, portals, workflow/business process automation platforms, EMR/EHR/RCM-enabled healthcare products. It’s not just about shipping features, but about designing and building systems with strong maintainability, reliability, availability, scalability, observability, tenant isolation, compliance controls, operational efficiency, and cost-aware infrastructure. On the application side, I work with Next.js, React, TypeScript, Node.js, NestJS, Python, FastAPI, Golang, Java Spring Boot, React Native, Flutter, Kotlin, Swift, and Electron. On the backend and integration side, I build REST APIs, GraphQL, gRPC services, middleware, webhooks, secure integration gateways, background workers, BullMQ-driven job pipelines, event-driven systems, and distributed services. I use Golang where high concurrency and performance matter, and Java Spring Boot where enterprise-grade backend services and integrations are the right fit. On the data and platform side, I’ve designed PostgreSQL-based transactional systems, Supabase backends, pgvector-powered retrieval layers, Redis-backed caching and queue patterns, ETL/ELT pipelines, audit-ready reporting, migration plans, semantic search, and AI-native data foundations. I build on AWS/Azure/GCP, and I design cloud-native platforms across serverless, Kubernetes, multi-cloud, on-prem, and hybrid environments with CI/CD, infrastructure as code, monitoring, alerting, centralized logging, and observability. With the rise of LLMs, I’ve delivered production AI systems involving advanced RAG, AI automation, AI agents, agentic workflows, multi-agent systems, LangGraph orchestration, MCP integrations, AI voice, computer vision, OCR, model fine-tuning, real-time streams, and business-system integrations. I also work with Vapi, Twilio, and Deepgram when voice, telephony, or real-time communication is part of the product. Where AI needs to operate safely in production, I design deterministic orchestration patterns, evaluation layers, and hallucination-minimization approaches around the workflow, not just the model. I also build for regulated and operationally sensitive environments. That includes HIPAA, SOC2, PCI-DSS, HL7/FHIR, PCI-aware payment flows, KYC/AML workflows, OAuth2, JWT, RBAC/ABAC, audit logs, secure access controls, and healthcare interoperability pipelines. I’m especially relevant where software, data, integrations, compliance, and monetization meet: HealthTech, FinTech/payments, LegalTech, logistics and supply chain, PropTech, B2B marketplaces, InsurTech, ConstructionTech, cybersecurity, compliance & Web3/blockchain platforms. Beyond implementation, I provide technical consultation for product design, system architecture, data architecture, integration strategy, infrastructure planning, modernization, and GTM strategies for diverse business verticals and markets. With a 100% track record of delivering projects on time, my credo is to exceed client expectations by focusing on the last 20% (attention to detail) which yields 80% of the results. Whether you're looking for a skilled development partner proficient in the latest technologies, tools, frameworks, or libraries or an experienced technical consultant to modernize legacy systems or develop a cutting-edge platform from scratch, feel free to reach out!!

Hi, this is Amit Hasan I have been in the programming field for over five years, working as a Software Engineer, Full-Stack Developer, and Software Architect. I am skilled in C, C++, C#, Java, Kotlin, Python, Dart, JavaScript, TypeScript, and Swift. On the framework side, I work with Flutter, React.js, Next.js, NestJS, and Django to build modern and scalable applications. I specialize in: Mobile App Development (Android & iOS with Flutter, Kotlin, Java, Swift) Web Development (React.js, Next.js, Django, Node.js, NestJS) Backend & Architecture (Microservices, REST APIs, RabbitMQ, Redis, PostgreSQL) UI/UX Design (Mobile & Web) Currently, I work with an IT company, building full-stack solutions and leading architecture design for web and mobile projects. I have also delivered many successful freelance projects for international clients on Upwork. Coding is not just my profession — it’s my daily life and passion. I enjoy turning ideas into products and am committed to delivering clean, efficient, and high-quality solutions. I’d be happy to work full-time or part-time on your project and bring it to success.

I have been Mobile App and Backend Web Developer for more than 9 years. During me past 4 years I have been engaged directly with client to consult/understand requirements before begin to develop. Kickoff meetings and their technical translations have been key to solid estimation of my projects. Each project is unique just like each person is different and it requires many perspectives to get to exactly what my clients want and I believe I have been very successful at doing this. As a developer I like to provide the simplest solution for the most complex problems. I strive for best innovation and digitization while providing industry-leading solutions. I always try to utilize development 'frameworks' to get to best possible functionality that is possible globally. My goal is to provide challenges for me and come out at the top with proper quality assurances frequently in between the process. I hope I could help out every client I get. I am an experienced Web & Mobile Application developer with more the 9 years of working experience. Together with mobile app I also happen to know the development of backend server services like Website, Web Service APIs, Dashboards, Admin Panels, Payment Integration etc. I have been developing apps using IntelliJ IDEA, VS Code, Android Studio, XCode, MS Visual Studio and Eclipse. ➡️ Command on Programming Languages: → Python → C# → Java → Kotlin → JavaScript → React, Typescript, Angular, Vue, Node → XML → Swift ➡️ Command on Software Tools → Android Studio → IntelliJ IDEA → VS Code → Git and GitHub → Postman → Visual Studio Code → XCode → Eclipse → MS Visual Studio ➡️ Web & Mobile App Development Skills → Firebase Services → Google Maps → GPS Location → SQLite and Realm → Push Notifications → UI/UX development → Google Ads Integration → RESTful APIs → All Social Media account authentication → In App Purchase → Offline support → QR code and Barcode scanning → Third party API integration → Background services → Tracking location