Most mobile app projects don't fail at the code — they fail at the App Store review, the half-finished features, or the developer who starts strong and fades by week three. I build production-ready mobile apps — Flutter, FlutterFlow, Native Android, and iOS — that go from idea to live on the App Store and Play Store. 12+ years, 105+ apps shipped, 100% Job Success on Upwork. If you need a developer who can take full responsibility for delivering clean, scalable apps on time and communicates clearly throughout — that's what my clients keep coming back for. ⭐ What I do best: ✅ Full mobile app development — Flutter, Native Android (Java/Kotlin), iOS (Swift/UIKit) ✅ FlutterFlow apps — built end-to-end with Firebase, extended with custom Dart code when the visual builder hits a limit ✅ AI integration — ChatGPT/OpenAI, Gemini, Claude, ElevenLabs (TTS), Speech-to-Text, and integrating most modern AI APIs into mobile apps ✅ App Store & Play Store launch, including policy compliance & rejections ✅ Fixing, modernizing & stabilizing existing apps (crashes, performance, UI) ✅ Long-term product development & maintenance 🛠 Core expertise: Cross-Platform: Flutter, Dart, FlutterFlow (custom actions, custom widgets, Firebase integration), responsive UI, native platform channels Native Android: Java, Kotlin, MVVM, Clean Architecture, Jetpack, Android SDK iOS: Swift, UIKit, Core Data, Auto Layout, App Store deployment AI & Voice: OpenAI, Gemini, Claude, ElevenLabs, TTS/STT, real-time transcription Video & Media: FFmpeg, photo-to-video, custom camera (Camera2), image editing Backend & Data: REST APIs, JSON, Room, SQLite, Firebase Maps & Location: Google Maps, Mapbox, GPS, background location tracking Monetization: AdMob, Unity Ads, in-app purchases, Stripe, subscriptions Architecture: MVVM, MVP, MVC, clean & testable code 🚀 I've shipped apps across AI, FinTech, Parental Control, Streaming, E-Commerce, Education, GPS Tracking, QR/Authenticity, Social & Video platforms and Many more. How I work: Fast, clear communication (usually reply within minutes) Realistic timelines — and I hit them I'll tell you honestly if something won't work, instead of wasting your time and budget I believe in building long-term relationships with my clients. My support doesn't end with project delivery—feel free to reach out anytime, even after the contract is closed, if you need assistance, maintenance, guidance, or help resolving any issues. If you're not 100% sure what you need yet, send me a message — I'll help you scope it out. Let's build something that ships. — Ramkesh

Over 15 years of practical experience in the development and architecture of enterprise systems for web, mobile and desktop. As a senior backend software developer created a lot of reliable, bug-free, well-documented RESTful APIs, heavy background jobs, web services, etc. Guru in JAVA, strong experience in .NET, ASP.NET, and experience in web development. In the past 10 years, I designed, architectured, and delivered a lot of heavy-loaded, reliable systems and services. The main domains where I was involved are: Accounting(Double-entry bookkeeping, reconciliations, chargebacks) Billing(Clients invoicing) Payments(Integration with various PSPs: PayPal, Payoneer, Transfast, WellFargo, Skrill, Adyen(visa, mc, amex), etc. ) Compliance(Users identity and data verification) Authorization and authentication(oAuth2) Me and my team successfully finished legacy migrations\modernization projects, such as: Migrated desktop app to Web Migrated\modrinzed from legacy Perl monolit to java microservice architecture: user-payments related logic Accounting related logic Invoicing related logic Compliance related log Migrated to newer vendors APIs, file-based - SOAP - REST I understand how the blockchain cryptocurrencies work and have an experience to process payments from BTC, ETH, LTC, Tether, XMR I'm familiar with AWS infrastructure and can set up enterprise-level systems on it. I take full responsibility for the architecture and quality of the logic that is delivered by me and my team. In the future, I see myself as a product architect and an engineering lead in a successful product company.

Senior Business Analyst, Developer, Database Designer, and Software Architect with a proven record of delivering effective results for complex business problems. Master of business/IT collaboration, object-oriented software development, and problem solving. Conference speaker, author and data dog.

**Top Rated Azure & AI Specialist | 100% Job Success | 5-Star Feedback** ASK ABOUT EXCLUSIVE MICROSOFT CSP DEALS—authorized Microsoft partner delivering discounted licenses fast. Experienced in creation of enterprise solutions for Fortune 500 clients (Chevron, FedEx) and innovative startups alike. I bridge traditional cloud architecture with cutting-edge AI agent systems, specializing in Azure, Microsoft Fabric, multi-agent architectures, and full-stack development. Enterprise Cloud & Data Engineering Longevity (Healthcare) - Architected enterprise medical claims modernization using Microsoft Fabric data lakehouse with Bronze/Silver/Gold medallion layers. Built Bronze for raw ingestion with Change Feed triggers, Silver for data cleaning using Python Notebooks and Dataflows with Microsoft Purview lineage tracking, and Gold for real-time claims processing via Power BI and Data Activator alerts. Integrated Azure Logic Apps, ARM templates, Terraform, and HR solutions using Power Apps/Dynamics 365 with Paylocity API. Financial Services Platform - Architecting cloud migration for $2.2B premium financial application. Designed complex ETL pipelines using Azure Data Factory, Logic Apps, Azure SQL, and Function Apps for Oracle-to-Azure SQL migrations with regulatory compliance workflows. SPS Poolcare - Migrated SnapLogic to Fabric Data Factory with zero downtime, integrating ServiceTitan, Paylocity, QuickBooks, and Excel for profitability analytics. Configured real-time SLA monitoring with Teams alerts via Activator. Established Git-backed governance and CI/CD pipelines. AI Agent Systems & Advanced Development: X-RaceIQ - Real-time racing telemetry platform with 8-agent system for professional motorsport. Designed concept for AI Crew Chief Radio hardware delivering voice-synthesized coaching through multi-agent analysis of telemetry, weather, competitor positioning, and track evolution during live racing. TrafficMate Radio - Voice-powered local discovery with 11-agent orchestration for social radio channels, restaurant coordination, and business discovery using ElevenLabs voice AI and location-based content delivery. Web Intelligence Suite - Chrome extension leveraging Gemini Nano for on-device AI processing—web summarization, contextual chat, and content analysis running locally without external APIs for enhanced privacy. Blockchain & Emerging Tech - Built Proof of Taste (AI recipe generation + Polkadot NFT minting), AR Portrait Gallery (WebXR + Library of Congress integration), and Hallucination Tracker (crowdsourced AI verification with crypto bounties). Technical Stack - Azure Data Factory, Logic Apps, Function Apps, Microsoft Fabric, Power BI, Dynamics 365, Multi-Agent AI, Voice AI (ElevenLabs), Python, React, TypeScript, Terraform, Polkadot, WebXR, Computer Vision Cloud & Infrastructure - Azure Data Factory, Azure Logic Apps, Azure Function Apps, Azure SQL Database, Azure API Management, Azure DevOps, Azure Kubernetes Service (AKS), Azure App Service, Terraform, Infrastructure as Code (IaC), ARM Templates, CI/CD Pipelines, GitHub Actions Why Choose Me: Enterprise-grade cloud architecture meets innovative AI development—proven ROI with technical depth across the Microsoft ecosystem and emerging technologies.

NOTE: Scammers and clients who are looking for charity, please don't waste my and your time! High-quality native iOS and Android, and Flutter apps wizard. I'm Oracle Certified Java developer with Master's degree in CS with 20 years of experience in developing not only Android and IOS projects, but also different projects that made me a great architect, complex issue solver and UX/Features improver in all aspects with experience in huge amount of libraries and frameworks such as Firebase, Parse, Spring, OpenAI and much much more. I'm the best in Android and iOS app development as I'm up to date with new technologies, features and tricks that Google team or Apple team announce. I have led all projects from scratch up to release with full understanding of OOP, SOLID, optimization, analisis and user experience. I'm proud of apps I made: Unfold, GuruShots, Frontstage, LiftDay, LiveMaster and others, so thanks to my clients that trusted me and gave me that opportunity. NOTE: Please do not be surprised by the large number of described technologies, that's even not all. 20 years is more than enough to be able to work with so many technologies! - Mobile: Android, IOS, Crossplatform(Flutter). - Android(All): Java, Kotlin, Dart(Flutter). - iOS: Swift, Dart(Flutter). - Backend: Spring Boot, Grails/Groovy, XML, JSON, REST, XSL/XSLT. - DB: SQLite, Oracle, MySQL, DB2, PL/SQL, XMLDB, PostgreSQL. - Severs: Jetty, Tomcat, Apache, IBM Websphere, Parse server. - Libraries and Frameworks: Firebase(All), Gradle, Spring-Android, RoboSpice, Retrofit, ORMLite, Google Services SDK, iOS Extensions, Square libraries, CocoaPods, Parse SDK, Backendless, Layer SDK, AfNetworking, Alamofire, Hearst-DD/ObjectMapper, Facebook SDK, Twitter SDK, Instagram Kit, Flurry SDK, GoogleAppIndexing, Grails, Spring, Struts/Struts2, JPA, Jespa, Hibernate, Ant, Web Services, JMS, JUnit, pi4j(Raspberry Pi, Orange Pi), FFMPEG, DexProtector, Flutter, Bloc, Riverpod, Lottie, Giphy, Algolia, Mapbox, Hive, Spotify, Freezed, RXDart, OpenAI. -Tools: Git, SVN, Intellij Idea, XCode, Android Studio, Jira, YouTrack, Zeplin, Sketch, Figma, Bitrise, Github Actions, Codemagic. -Methodologies: Scrum, Kanban. - Experienced in apps that included: Social, Chat, IM Messaging, Map, Filtering, Search, E-commerce, In-app billing/purchases, Store, Fitness, Photos, Videos, Voice, Processing, Recording, Player, Event, Backup, Image, Contacts, Calendar, Share, Push, Interactive, Notifications Content / Service extension, OBB, Expansion, Deep link, Navigation, Animation, Crop, File, Upload, JSON, REST, API, Library/Gallery, Paging, Storyboard, Support multiple screen sizes, Full stack, Best practice code, Convention, OOP, Play Store, Itunesconnect, TestFlight, OpenAI, AI integration, ChatGPT.

I am a Senior Software Architect specializing in Enterprise Mobile and Enterprise Web Application, SaaS, and API development. I am also the founder of my Upwork Agency, guaranteed.software. To compile a complete list of all skills I offer is now impractical, but below I highlight my skills which are possibly most relevant in today's market. ============================================= Languages, Frameworks, and Libraries of expertise ============================================= PHP - Symphony, Laravel, CodeIgniter, Cake, Zend, Magento, WordPress, WooCommerce JAVASCRIPT - React (Native), Node.js, AngularJS, JQuery PYTHON - Django, Web2P JAVA - Spring, Hibernate, Play, Android SDK HTML5, CSS3 - BOOTSTRAP SASS/SCSS LESS ================= Data Persistance ================= MongoDB SQL - MySQL, PostgreSQL, OracleDB, MSSQL Memcached LDAP File Systems ============================= OS and Deployment Environment ============================= *** OS **************************** Unix - MacOS Linux - Ubuntu, CentOS Windows Server ************************************ *** Deployment Environment ******************************************* Dedicated Servers, VPS Cloud-Based - AWS, Heroku, Google Cloud, Openshift, Docker Web Servers - Apache, Ngix ******************************************************************************* ======================= Testing ======================= BDD: Behat, PHPSpec (PHP), JBehave (Java), behave (Python) TDD: PHPUnit (PHP), JUnit (Java) HTML & CSS Regression Testing: BackStopJS (CasperJS, PhantomJS, ResembleJS) ========================= Additional Workflow Notes ========================= Though this may seem like a lot of computer jargon, it is important to mention a few other details to development that are instrumental in allowing me to guide your project to success. I am more than happy to explain anything that you are uncertain about prior to starting the project and we can determine what is and is not essential. I find that setting up bi-weekly, and sometimes daily 5 minute SCRUMs is very beneficial by keeping everyone on the same page. It is commonplace for us to use project management software on all projects. Currently, I prefer using Jira, Asana or Trello. If you don't have something like this already, I can set this up for you. For SCM, I typically use GIT on GitHub or BitBucket, often in conjunction with Hudson, Jenkins, or Travis CI. If you do not have these things set up, I can instantly get these rolling for you. I am very comfortable with working in your own development environment, if it already exist, whether it is cloud-based like AWS or if it is on a VPS or Dedicated Server(s). I also maintain an internal development server which is ready for use in the case that you do not already have an established development environment. Finally, comprehensive project estimation and consultation on the best approach to completing your project can be done in a separate, fixed-price project at $100 USD. Due to previous experience, It is no longer possible to offer consultation or any deliverables prior to being hired outside of the aforementioned arrangement. I'm looking forward to providing you success, guaranteed!!!

Engineer in web development with an experience of 9 years, I work mainly with scrum methods that I particularly like for their flexibility. I have been able, through my various experiences, to approach several technologies. For the last 7 years, I have been working on the front-end using all versions of Angular and Ionic for hybrid application development. I am open to listen opportunities in Los Angeles county to satisfy my desire to achieve a big challenge.

✅ Top Rated Senior .Net developer & Full stack developer with extensive experience in ASP.Net, C#, .Net Core, EF, PHP, API's ✅ Have created web apps using Angular 2+, Vue.js, React.js & Redux, Wordpress, Wix, Squarespace. ✅ Built eCommerce stores on Shopify, Shopify Plus, Salesforce Commerce Cloud, Bigcommerce, and LightSpeed. ✅ Hands-on experience in building API's and Integrating various API's. ✅ Available to start immediately. 18+ yrs of development experience | Awesome Designs | Flawless Coding | High Conversion Rate | On Time | Quality Driven | Excellent Communication Skills | Round the Clock Availability | Product development | Leadership to drive results I create business grade web / mobile app solutions and strive to deliver software of brilliant quality using the SOLID principles, TDD approach, agile methods for rapid iteration. I'm a self-motivated professional with a strong work ethic and productive self-starter with success being a freelancer on Upwork. I'm a great team-player, have participated in multiple projects, joining large teams, effectively co-working with other professionals and I provide the following services - Web Applications development - .Net, C#, ASP.NET Core, MVC, Angular, Web API, JavaScript, JQuery, Knockout, Node JS, AJAX, Reactjs, Ruby on Rails and Razor. Mobile Applications development - iOS, Android, and Windows Phone via Xamarin (MVVM Cross and Xamarin Forms), React Native, Ionic and Flutter. Cloud Services - AWS and Azure. Desktop Applications development - C#, WCF Data services, MS Access, OData and Win Services. Microsoft SQL Server, Reporting Services, N-tier application design, ORM, LINQ, Entity Framework, MVVM, Silverlight, AJAX, K2 Blackpearl, SharePoint Development, Salesforce, SharePoint, ERP/RFID Listener services and Microsoft Dynamics CRM API Development: Amazon MWS/SP-API, Bigcommerce API, Zendesk API, Quickbooks API, Chargebee API, Recurly API, Shopify API, Ebay API, Walmart API, Wish API, Endicia API and Most Restful API's Project Management: I have worked with diversified teams and have managed to deliver high quality products. I have experience with various project management tools and issue or bug tracking tools. I have experience with waterfall model, agile and scrum project management models. Technical Project Management: I bring in a mix of technology and project management which makes me to monitor project progress and deliver high quality products. I am available to start immediately. Please leave me a message to discuss further. UI/UX --------- Angular Reactjs/Redux Bootstrap HTML, CSS Vue.js Bigcommerce Stencil, Shopify Liquid, Shopify Plus, Salesforce Commerce Cloud Programming ----------------- ASP.Net, VB.Net, C#, .Net core, MVC, Java, Entity Framework, JSon, MS Access, XML, Node.js, Java Scripts, Xamarin, Telerik, Kendo UI, Crystal Reports, PHP CMS/Frameworks: ------ Wordpress, Laravel, DotnetNuke, Umbraco, Squarespace, Wix, Contentful Databases ------------- SQL Server, MS Access, MY SQL, Cosmos DB, MongoDB, Dynamo DB, Oracle API's ------- Freshdesk APi, Zendesk API, Freshsales API, FreshMarketer API, Unbounce APi, Google docs API, Quickbooks APi, Adwords API, Shopify API, Bigcommerce API, Amazon MWS/SP-API, UPS API, Fedex API, DHL API, USPS API, eBay API, Most REST API's, Twilio API, Unbounce API, Sage API, Kronos API, OCAPI 3rd Controls: --------------- Telerik, KendoUI, AG-Grid, Material components, Reporting, Crystal reports Cloud -------- AWS, GCP, Azure, CI/CD Visualization Tools ---------------------- Power BI Search --------- Elastic Search, Apache Solr Identity --------- Amazon Cognito, Azure Active Directory, Okta, Auth0

Software Design & Development: 16+ years of experience in architecting, designing, maintaining and optimizing high-performance software systems. Proficient in software design principles (SOLID, KISS, DRY, YAGNI etc) and Object-Oriented Programming (OOP) concepts, including design patterns (Singleton, Factory, Adapter etc). Skilled in SDLC and Agile methodologies, with hands-on experience in SCRUM, CI/CD pipelines, and Test-Driven Development (TDD). ● PostgreSQL DBMS Development & Administration: Expertise in PostgreSQL internals and extensions development, enhanced with features like security hardening, Transparent Data Encryption (TDE), and Oracle/MSSQL compatibility. Skilled in PostgreSQL database administration (DBA), designing high availability solutions using replication, backup and failover strategies. Hand on experience in PostgreSQL servers performance tuning and queries optimization. An active contributor to the PostgreSQL and IvorySQL open-source communities, including patch submissions, commit-fests, and code reviews. ● Linux System Software Development: Proficient in Linux Kernel customization, Linux Security Modules (LSM), Kernel Modules, and user-space programming/scripting. I am fluent in system programming on linux based devices as well as in web & desktop programming using following tools: - C language (Linux Kernel Customizations, Drivers, Kernel Modules and other system level stuff) - C++, .Net (.Net Core, C#, WPF, WCF, ASP.Net, VB.Net, MVC) - Databases (MS SQLServer, Sybase, Oracle, MySQL, PostGreSQL, REDIS) - ADO.NET, Entity Framework, OTL - Database Queries Optimization - Parallel Computing (OpenMP, TBB, TPL, PLINQ) - Complete grip on XML/XSL/XPath/CSS - VBA/JavaScript, MS World/Excel plugins development - Web/Desktop Services (C++, .Net Remoting, SOAP, REST ) - Libraries including STL, boost, ICU, PThreads, MFC, libXML, V8, protoBuff, log4cpp, OTL etc - IDEs & Tools (VS2003/05/08/10/15, Eclipse, UFT/QTP, VMWare/VitualBox/Hyper-V) - Code Repositories (TFS/VSS/SVN/Git/JIRA)

I can code in a wide range of languages and frameworks. Here's a quick overview of what I can help with: Languages: Python, JavaScript, TypeScript, Java, C#, PHP, Swift, Kotlin, and more. Frontend: React, Vue, Angular,Next.js, HTML/CSS, and more. Backend: Node.js, Spring Boot, .NET, and more. Other areas: Databases (SQL, NoSQL, ORMs) DevOps (Docker, CI/CD, Infrastructure as Code) APIs (REST, GraphQL, gRPC) Testing (unit, integration, e2e) Algorithms and data structures System design and architecture I can write new code from scratch, debug existing code, refactor, optimize, explain concepts, or help you work through a design problem. Just let me know what you'd like to build or fix, and I'll jump right in!