Full Stack & Mobile App Developer | React, React Native, Node.js, PHP, AWS I specialize in building scalable web applications, cross-platform mobile apps, and real-time solutions using modern technologies. As an independent freelancer, I've developed and delivered multiple production-ready applications for startups and businesses, handling everything from development to deployment. Core Expertise Frontend: React.js, Next.js, JavaScript, TypeScript, HTML5, CSS3 Backend: Node.js, Express.js, PHP, REST APIs Mobile: React Native (Android & iOS) Databases: MySQL, MongoDB, Firebase Firestore, Firebase Realtime Database Cloud: AWS, EC2, S3, Domain Configuration, SSL Setup, Play Store & App Store Deployment Real-Time & Integrations Experienced in building real-time applications using Socket, WebRTC, Firebase Cloud Messaging, live location tracking, payment gateway integration (Razorpay, Stripe, PayPal), Firebase services, authentication, push notifications, deep linking, and third-party API integration. Services Full Stack Web Development Cross-Platform Mobile App Development Restaurant & Delivery Applications Social Media Applications Real-Time Chat, Audio/Video Calling & Live Streaming API Development & Integration Cloud Deployment App Publishing Performance Optimization Maintenance & Support I focus on writing clean, scalable, and maintainable code while delivering secure, high-performance applications. Whether you need a product built from scratch, feature enhancements, API integrations, deployment, or long-term maintenance, I deliver reliable, production-ready solutions tailored to your business needs. Tech Stack: React, React Native, Next.js, Node.js, Express.js, PHP, JavaScript, TypeScript, Firebase, AWS, WebRTC, Socket, REST APIs, Razorpay, Stripe, PayPal, MySQL, MongoDB, Git.

TECHNICAL KNOWLEDGE ß Programming Languages C, C ++, C#, Objective-C, Swift 4 Server O. S. Window XP, Window 7, Mac Database Systems MS Access, SQL Server, Sqlite Web Technologies& Services HTML , XML, JSON, Asp.net

Additional Details Positive, always ready for new opportunities, willing to develop. ---------------

Over seven years of experience in designing complex telephony Systems using Asterisk, OpenSIPS and FreeSWITCH. - Implementation of OpenSIPS/Asterisk/Radius based telephony systems. - Implementation of various contact center solutions. - Google's Speech Recognition: text2voice and voice2text - vTigerCRM and Asterisk integration for callpopups. - Predictive dialer and progressive dialer. - Configuration of various TDM Gateways. - iOS/Android push messaging integration with OpenSIPS. - Realtime Rate web service for SIP Clients. Key Skills. Asterisk, OpenSIPS, FreeSWITCH, Kannel, FreePBX, Elastix, Genbend SIP Server, FreeRadius, Openfire XMPP. Perl, Python, PHP, Symfony

Hi, I am Punit, Verified and Top Rated iPhone App(s) Developer on Upwork with more than 5 years of overall experience. Working at "Wegile" is like being a member of a winning team where innovation is “meaning of life”, motive is “progress through learning” and "there is always a better way of doing things" is the common belief. I'm an expert in developing iOS, WatchOS and TVOs based mobile apps with more than 5 years of experience in Objective-C, Swift, and C/C++, as well as implementing web services, architecture design and enterprise mobile environments. Expertise: • Native mobile app development for iPhone & iPad - iOS, Apple Watch - WatchOS, Apple TV - TVOs • Mobile Backend development (Parse, AWS API Gateway, Google App Engine, REST Web Service API, XML/JSON) • WatchKit, Xcode 7, UIStoryboard, AutoLayout • Development languages: Swift 2.x and 3.x, Objective-C, C/C++, AngularJS, NodeJS, JavaScript, Ionic, Cardova, HTML5 • Database: MySQL, SQLite, PostgreSQL, MongoDB, Core Data, AWS Dynmo DB • Social network integration: Facebook, Twitter, Foursquare, LinkedIn, Google+, Instagram • Chatting protocol: XMPP, Open Fire, AMQP, MQTT • Geolocation services: GPS, Google Maps, Yandex Maps, OpenStreetMap • Payment services: PayPal, In-App Purchase, Stripe • Misfit API, FitBit API, Expedia API, other 3rd Party BLE 4.X device integration API's • Version control: Git, Subversion • Analytics services: Flurry, Google Analytics, Mixpanel, Localytics • Distributing services: TestFlight, HockeyApp, Crashlytics • Design Tools: Adobe Photoshop, Sketch • UIKit framework, Core Graphics for customized UI components • Core Data, iCloud integration for data storage • AV Foundation, Core image • iAd, In-App purchase • Offline Map using route-me library If you have any questions, please send me a contact request on UpWork and I'd be happy to collaborate with you on your next project. Thanks, Punit

OBJECTIVE To obtain a position where I can effectively utilize my strong communication skills, experience and ability to expand my knowledge.

With my expertise in IOS Applications , I think I would be a great addition to a company as a IOS Developer. I have advanced knowledge in Swift,Objective C. I am eager to bring my experience to help your team succeed. As the Senior IOS Developer at Shourya Global(littus’s) I have an resposiblites as a lead and guide juniors, new feature development and deploying an application on App Store . My work helped to succeed to complete projects. Through my experience, I have developed strong features like HDR Bracket capture,LIDAR SCAN,FireBase,CoreData,MVVM,MVC and more other. I am confident I could be a valuable addition to your team.

Deep knowledge and experience in IOS application design and implementation Updated knowledge of XCode 6.4, iOS 8 and Swift Experienced in all aspects of iOS application development including designing for all types of screen sizes and orientations. Well versed in user-friendly design, performance improvement, documenting code, refactoring, continuous integration and deployment, and unit testing Complete understanding of Object Oriented Features (Inheritance, Polymorphism, Abstraction and Encapsulation) Experience in implementation of Auto Layout. Working knowledge of Unit and Automated testing Familiar with deploying applications using Xcode and App Loader Developed native based iPhone applications and beginning knowledge of hybrid development Developed and implemented application designs based on MVC and Singleton Trained in Agile SCRUM, Waterfall, and TDD methodologies Experienced in XML and JSON Parsing, Multithreading using both native and third party frameworks including TouchXML, SBJSON, NSXMLParser, and NSJSONSerialization Extensive knowledge of various frameworks including: UIKit, Core Data, AVFoundation, EventKit, AddressBook, AddressBookUI, MessageUI and Core Location frameworks Familiar with repository using Git, Subversion Efficient storage of data using File System, SQLite, Core Data and Database and Plists Familiar with UI design implementation using both Storyboards and NIB files In-depth knowledge of Automatic Reference Counting and Manual Memory Management Worked with offshore teams to ensure that features are being completed and implemented correctly Implemented application designs based on MVC architecture Worked with QA leads, Graphic Design leads, Project Managers, and Shareholders to effectively develop applications Understanding of project management activities using AGILE software development process. Excellent knowledge of Client-Server communication through socket connections Ability to work in a fast-paced environment and meet compressed deadlines Great knowledge of implementation of third party HTML and JavaScript charts like High charts, J plot, Fusion Chart. Good knowledge in integration of advertisement using iAds and other third party ads frameworks like AdMob, Chartboost, InMobi, Millennial Strong hand in dealing with UITouch in various custom controls and functionality like drag drop, custom drawing

I'm a developer with 5+ years of experience in Android native development. There are a lot of different applications in my portfolio: messengers, maps, e-commerce, media, IoT clients, business clients, and even games. Many of them work great and carry out their tasks, some of them have become one of the best in their field with hundreds of thousands of pleased active users. I experienced: - Android SDK - Java, Kotlin - Realm, SQLite, Room - Firebase - Dagger 2, Koin - RxJava 1, 2; Coroutines, Flow - OkHTTP, Retrofit, Smack (XMPP) - MVC, MVP, MVVM, MVI - Compose - Clean Architecture, SOLID, GoF, UDF, KISS, DRY и др - AndroidJetpack: Live Data, ViewBinding, Livecycle, Navigation и др. - Git, Github, Gitlab, Bitbucket, Jira, Trello, Redmine, Linux, Crowdin, TravisCI, GitlabCI, Jenkins, Postman, and other instruments Contact me if you want to make your application great!

Building SaaS and multi-tenant systems that scale without breaking later. I’m Muhammad Ahmed, a full-stack/platform engineer with 5+ years of hands-on experience shipping production-grade systems across backend, frontend, infrastructure, observability, and design-to-build workflows. I help teams move from “it works locally” to reliable production systems using Elixir/Phoenix, Next.js, Node.js, TypeScript, Figma, and modern DevOps/cloud tooling. What I deliver ✅ Full-stack SaaS development (React/Next.js + Elixir/Node backends) ✅ Multi-tenant architecture and secure auth flows (JWT/OAuth/OIDC) ✅ AI workflows, RAG, and support chat systems — retrieval, grounding, and production-safe integrations ✅ Performance-focused backend and database design ✅ CI/CD and deployment automation (Jenkins, GitHub Actions, Docker) ✅ Infrastructure support (OpenStack, Ceph, AWS) ✅ Monitoring and observability (Grafana, Prometheus, Netdata, Watchdog, Zabbix) ✅ Figma-to-production implementation (responsive UI systems and reusable components) ✅ Email and messaging infrastructure when needed Core stack Elixir, Phoenix, Phoenix LiveView, Next.js, Node.js, TypeScript, React, Figma, PostgreSQL, Docker, Jenkins, OpenStack, Ceph, AWS, Grafana, Prometheus, Netdata, Zabbix, GraphQL, Tailwind CSS I focus on clean architecture, maintainable code, and fast execution. Whether you need a blocker fixed quickly or a system built end-to-end, I deliver practical solutions you can s