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$75/hr
100% Job Success
$100K+ earned
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With 12+ years of experience, I am an expert iOS Engineer who specializes in developing mobile applications using both Swift and Objective-C for the Internet of Things (IoT), social networks, video processing/ streaming, and other industries. I have a deep understanding of the iOS ecosystem, and Apple frameworks such as UIKit, SwiftUI, Core Data, Combine, and others. I have a good understanding of the software development process, from requirements gathering to deployment. I can expertly lead and mentor teams of engineers to deliver projects on schedule, within budget, and to a high standard. I have a passion for creating user-centric apps that are not only functional but also easy to use and intuitive. With more than 40 projects completed both individually and as a member of other teams, I have a proven ability to develop and implement effective solutions to technical challenges and to work with cross-functional teams to deliver projects on schedule and within budget. I am always looking to improve my skills and stay current with the latest developments in the field. EXPERTISE: - Programming Languages: Objective-C (8y), Swift (6y); - Technologies: UIKit, SwiftUI, Combine, CoreData, CoreLocation, Social, MediaPlayer, AVFoundation, GraphQL, SQLite, HomeKit, OAuth, WebSockets - App architectures: MVVM / MVC / MVVM-C / VIPER / TCA; - Development Tools: Xcode, Reveal, LLDB; - Bug tracking: Xcode Tools, Jira, Google Analytics, Flurry, Crashlytics, HockeyApp; - Unit testing: XCTest, Quick/Nimble; - 3rd party frameworks: Alamofire, Realm, Firebase, RxSwift, GRDB, others My experiences include building: - complex social network projects - iOS and Mac OS utility apps - indoor navigation - iBeacon / Eddystone integrations - audio/video streaming applications - IoT / smart home device integrations with Bluetooth / WiFi connectivity
Nikita I. has worked .
Sergei Z.
$110/hr
100% Job Success
$400K+ earned
Available now
Offers consultations
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Most mobile apps fail because nobody thinks about what happens after launch. I've built apps that broke into the App Store Top 50, generated real revenue for clients, and I run my own subscription apps with 10K+ active users. I know what moves MRR and what doesn't. When you work with me, you're not just getting a mobile developer. You're getting someone who has personally: - Designed paywalls and onboarding flows that convert (not just "look nice") - Run paid acquisition (Meta, TikTok, Apple Search Ads) for subscription apps - Optimized for retention, churn, and LTV - the metrics that actually decide if your app survives - Built the ASO and organic growth side (keywords, screenshots, A/B tests) - Provided ongoing technical support so the product keeps improving post-launch If you're building a subscription app and want it to sell itself not just ship and pray - let's talk. I take on a small number of clients where I can be involved beyond the build: helping with monetization strategy, growth, and long-term technical health. Some of what I bring: - 10+ years building iOS and Android apps (10M+ combined downloads) - 200K+ MRR generated to clients - My own subscription apps with 10K+ users - Apple Pay / Google Pay / RevenueCat / subscription infrastructure - CI/CD, white-labeling, and the boring-but-critical engineering work - AI integrations (LLMs, on-device ML) where they actually improve the product Looking to launch, grow, or rescue a subscription app? Send me a message - happy to give you honest thoughts even if we don't end up working together.
Sergei Z. has worked .
Barry J.
$85/hr
100% Job Success
Available now
Offers consultations
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With me, you’re not just hiring a developer, you’re getting a CTO-level engineer who builds software that actually scales and makes money (with proof!). My focus is simple: deliver high-performance, production-ready software that creates real business value, without wasted time or wasted money! If you want transparency, straight answers, and a stress-free development experience, you’ll enjoy working with me. Here’s how I do that: 1- Using AI only where it genuinely reduces cost and speeds delivery (not as a gimmick). 2- Reusing battle-tested code from 12+ years of real-world development, so you’re not paying to reinvent the wheel. 3- I build it right the first time, so they don’t break as users grow ++++++++++++++++++++++++++++++++++++ MY PROCESS (What you can expect from me) ++++++++++++++++++++++++++++++++++++ I follow a clear, efficient process designed to keep projects calm and predictable: a- Deep discovery: Understanding your users, business goals, and constraints b- Thoughtful design: Clean UX/UI that solves real user problems c- Strong engineering: Secure, performant, maintainable code d- Thorough testing & delivery: So launches don’t feel risky Clients value me because I communicate clearly, explain tradeoffs, and don’t disappear once development starts or after development ends. LET'S DISCUSS YOUR PROJECT! If you want help bringing your product to market, improving an existing app, or building something that can actually scale and make money, then by all means... let’s talk. I’m happy to walk through your idea step-by-step with you, identify risks early, and help you make smart technical decisions before you invest more time or money. ++++++++++++++++++++++++++++++++++++ What I Specialize In ++++++++++++++++++++++++++++++++++++ Medical & healthcare applications Fintech & payment systems AI-powered tools and automation Social networks & marketplaces Streaming & content platforms Productivity & workflow tools E-commerce & B2B platforms I work with both consumer-facing products and enterprise / B2B systems. ++++++++++++++++++++++++++++++++++++ Technical Experience ++++++++++++++++++++++++++++++++++++ MOBILE iOS (Swift, Objective-C, WatchOS) Android (Kotlin, Java) React Native, Flutter Web & Backend React, Next.js, Angular Node.js (Express) PHP (Laravel, Symfony, CodeIgniter, Cake) Python DATABASES SQL: MySQL, Postgres, MSSQL, SQLite NoSQL: DynamoDB, MongoDB, Firebase INTEGRATIONS & TOOLS Payments: Stripe, PayPal, Square, Clover, QuickBooks, Aloha Analytics & Monitoring: Sentry, Crashlytics, Mixpanel, GA Mobile & Growth: TestFlight, Branch, AdMob Maps: Google Maps, Mapbox Social APIs: Facebook, TikTok, X (Twitter), LinkedIn, Instagram
Barry J. has worked .
OffSure Software Solutions
Associated with
OffSure Software Solutions
$100/hr
100% Job Success
$40K+ earned
Available now
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Hello! I'm Lucas. I am a highly experienced software developer who specializes in app and mobile game development, and I have been building apps, games, websites, and other software for over 15 years. I graduated with honors from the University of California: Santa Cruz with a degree in Computer Science (with a focus in game design). Upon graduating, I worked as an engineer for Intel for several years. After that, I decided to become an independent developer and have managed my own app development company for the past 9 years. I have developed and released several popular apps and games of my own design for Android and iOS, and have worked on countless projects on a freelance basis. These projects have ranged from small bug fixes/optimizations, to prototype designs of new games, apps and utilities, to fully functional apps for small studios and large corporations alike. Though I have focused expertise in mobile app and game developments, I am also quite skilled in related fields such as UI/UX design, web development, backend programming, and technical art creation (Adobe Photoshop/Illustrator/etc.). I am constantly learning new skills and work hard to keep my knowledge up to date with new frameworks, platforms, tools, and best practices. I have recently embraced agentic AI code development to speed up production time, but I never "vibe-code" or accept code changes without reviewing and understanding what has changed. AI is a valuable tool, but not a replacement for a professional developer. Don't waste your money on a bloated production team, and don't risk your dream project with an inexperienced or inattentive freelancer. Regardless of the needs of your project, big or small- prototype or production-ready, I'm your dev. Let's build it!
Yurii B.
$60/hr
94% Job Success
$1M+ earned
Available now
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✅ 15+ years of overall programming experience. 🗃 50+ successfully completed projects on Upwork. 🎓 Master's degree in Applied Mathematics and Informatics. Specialize in: 💎 Web Development 💎 Desktop Development for Windows 💎 Mobile Development for iOS / Android / Cross-platform 💎 MS Dynamics 365 / Salesforce 💎 UI / UX Design 💎 VR & AR Development using Unreal Engine / Unity 3D 💎 Artificial Intelligence/Machine Learning 💎 Project / Product Management 💎 Technical Oversight / Solution Architecture Expert in: C#, JavaScript, TypeScript, MS SQL, MySQL, PostgreSQL, MongoDB, ADO.NET, Entity Framework, OData, WCF Services, SOAP, REST, ASP.NET, ASP.NET MVC, ASP.NET Core, WebAPI SignalR, WinForms, WPF, ClickOnce, WinServices, MSMQ, DirectX/OpenGL, 3D Graphics, HTML, CSS, JavaScript, JQuery, Angular, React, Blazor, Vue, ElasticSearch/Solr.NET/Lucene, Redis, Azure, AWS.
Yurii B. has worked .
Snehal B.
$60/hr
95% Job Success
$100K+ earned
Available now
Offers consultations
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If you're building a Sportsbook, Casino, Sweepstakes, Fantasy Sports, or Prediction Market platform, I help you go from idea to a live, scalable product without the costly mistakes most operators make early. Over 8+ years, I've personally led the architecture and delivery of multiple iGaming products across the US, African, and European markets. My most notable build: ReBet - scaled from MVP to 1M+ users and 80,000+ daily active users. I personally lead every engagement - strategy, architecture, and key delivery decisions - supported by a dedicated iGaming team of Designers, Developers, QA Engineers, and Project Managers. ► Core Offers • Sportsbook & Casino Platform Development • Sweepstakes Platforms • Fantasy Sports & Prediction Market Platforms • Product Architecture & MVP Development • Wallet, Payments, KYC & Third-Party Integrations ► Selected Experience • ReBet - Led full development from MVP to scale; grew platform to 1M+ users and 80,000+ daily active users • FtimerBet - Real-money gaming platform for the Nigerian market; launched in January 2026 with 20,000+ live users and growing. Delivered sportsbook, casino, • Division Casino & Poker - Started with a casino platform and are now expanding it into a poker platform for the US market. • RiloBet - Modern sportsbook with real-time functionality ► Key Integrations • Sportsbook & Odds: Betby, BetConstruct, OpticOdds, OddsAPI, Sportradar, Genius Sports • Casino & Games: Alea Play, Evolution, Pragmatic Play, Ezugi, Choice Gaming, PoPOK, CreedRoomz, Pascal Gaming • KYC & Compliance: Socure, Veriff, YouVerify, Plaid • Payments: Stripe, Monnify, Paystack, OPay, PalmPay, AptPay, Breeze, Finix, HeroPayments, CoinsPaid • Geo & Security: GeoLocs, Radar, MaxMind ► Engagement Options • Discovery & MVP Blueprint • MVP Development & Launch • Scaling, Optimization & Long-Term Support If you're planning a Sportsbook, Casino, Sweepstakes, or Fantasy Sports platform with a budget of $10K+ and need delivery within a defined timeline - message me with your market, platform type, and launch goal, and I'll map out the fastest path forward.
Snehal B. has worked .
Prometteur Solutions Pvt Ltd
Associated with
Prometteur Solutions Pvt Ltd
$50K+
earned
Ahmad I.
$60/hr
100% Job Success
$70K+ earned
Available now
Offers consultations
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✨ Expert-vetted AI Developer with 10 years of experience | $1B+ in revenue generated & saved for startups using AI | Delivered 67+ successful projects across Sports, Real Estate, EdTech, Marketing, Legal, SaaS, Healthcare, Fintech | Core expertise: AI/ML solutions, AI Chatbots, voice agents, automations, MVP to scale enterprise product. ✨ Upwork Certified Experienced Machine Learning /Agentic AI / knowledge graph/ Python Engineer with 10 years in building and deploying Artificial Intelligence solutions across industries. Skilled in Generative Artificial Intelligence, Natural Language Processing, Computer Vision, Neo4j, knowledge graph and full-stack development, with a focus on real-time data-driven applications and cloud deployments. Passionate about turning complex problems into actionable Artificial Intelligence solutions. 🌟 Top Rated plus Full stack Artificial Intelligence web & Mobile App developer on Upwork🥇🏅🏅🥇 🌟 Top 1% in knowledge graph, AI Agentic, Chatbot, LLMs, Lama, LangChain, Langgraph, RAG, Computer Vision, Machine Learning, agents graphs web and mobile app development 🌟 Top 1% in Next.js, React, TypeScript, Tailwind, Shadcn, Vercel, and Drizzle ORM development 🌟 Top 3% in AI-web, AI-Healthcare and AI-Fintech development 🙌 🌟 Top 5% in React, Python, Node.js, Next.js and Java development ✨ I specialized in full stack web and mobile application development. Involved in solution designing, developing, deploying, testing, and debugging of large-scale applications I proficiently utilize AI tools such as lovable, Cursor, GitHub Copilot, Devin AI, & AutoDev . My Tech stack: ✅ Client Side: React, Next Js, Typescript, MUI Components, Ant design Components, React Native, tailwind css, HTML5/CSS3, UI/UX, Media Queries, Sass, Swift, Kotlin, MacOS, WatchOS, Wearables , Gsap, Three js. ✅ Backend: Python,Java, Next Js, Web API, JWT, Node.js, OAuth, GraphQL ✅ DevOps/Cloud/Microservices: Docker , Kubernetes, AWS (EC2, EKS, ECS, VPC, S3, API Gateway, Lambda) Git Actions , Jenkins, CI / CD , Serverless, Terraform, API Gateway, Load Balancers ✅ Data Stack: AWS Dynamo DB, SQL Server, PostgreSQL, My SQL, MongoDB, Firebase, Supabase ✅ Integrations: OAuth Providers: OAuth, Auth0 Social Media APIs: Facebook API, Google API, Instagram API, Youtube API, Tiktok API Payment Gateways: Paypal API, Stripe API -Communication: SendGrid, Web Sockets, OpenTok (video calling), Twillio, Other APIs: Krogger API, WeChat Data Visualization: High Charts, jQuery Data tables WHY HIRE ME? ✅ 100% Job Success rate ✅ 137+ Clients Across Various Platforms Why Choose Me? ✅ Beyond Code: Optimize costs and performance by selecting the right AI tools (open-source vs. enterprise APIs) for your use case. Trusted by Fourtune 500 and VC-Startups; praised for transparency, deadline-driven execution, & balancing technical precision with intuitive UI/UX. What Clients Say!💬 Ahmad built a 76-agent omnichannel system that coordinates voice, SMS, email, LinkedIn, & web chat from one agen. His grasp of LangChain, Lang graph, knowledge graph & AI Agentic engineering was a game-changer. I’ve built AI agents that generated over $10M in sales pipeline for Mercedes-Benz, Honda, and eXp Realty. I built the multi-agent system, an AI health coach that turns wearables, bloodwork, & DNA into evidence-backed guidance with PubMed, NIH, and WHO citations on every recommendation, running live on production with a privacy-first, consent-driven architecture. He doesn’t just write code he solves problems. His AI prototypes helped us secure seed funding efficiently. Flawless communication. Delivered a production-ready ML model ahead of schedule. ✨ Key skills: Generative Artificial Intelligence: Langchain, knowledge graph, LlamaIndex, LangGraph, LangSmith, HuggingFace, StableDiffusion, Midjourney, OpenAI, Neo4j, graphs, Chat GPT-4, GPT-3.5, Mistral7B, Gemini Prompt Engineering: ICO, TESSA, ReAct, Chain of Thought, Map Reduce, Refine Full Stack Development: web and mobile app REST APIs OCR Computer Vision Audio Processing. Ultravox, Vapi, Twilio Natural Language Processing: BERT, fastText, Langchain, Langgraph CNN Architectures: LeNet, AlexNet, VGG16/19, InceptionV3, ResNet50 Object Detection: R-CNN, SSD, YOLO, TFOD API Image Segmentation: Mask R-CNN Transfer Learning Time Series Analysis: ARIMA, SARIMA, LSTM, Prophet OpenCV Educational Tutorials Web Scraping Web Crawling API Clients Deep Learning Frameworks: Keras, TensorFlow, PyTorch Visualization Tools: Dash, Shiny, Plotly, Streamlit, React, Next.js Data Analysis: Pandas, Numpy, Scipy Scraping & Crawling: Scrapy, Selenium, requests Google Analytics, FB/META API, Stripe, CCXT, OPEAI, etc. REST API Development: Flask, FastAPI, Node.js, Python, Java, React Native, AWS, Interface Builder, Core Data, AI Development, LangChain, knowledge graph, Chatbots, LLaMA, Machine Learning, NLP, Generative AI, Python, MVP.
Ahmad I. has worked .
$90/hr
100% Job Success
$300K+ earned
Available now
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I have been a professional programmer for over 20 years. I have worked on a wide variety of projects, from web-based ERP systems to HIPAA-compliant emergency messaging apps for iOS and Android to Electronic Logging Device mobile apps for long haul truckers. I have participated in both the front-end development of apps and web sites, as well as the development and administration of SQL databases, including extensive experience with stored procedures. I look forward to hearing from you about your project.
Info-Power International, Inc.
Associated with
Info-Power International, Inc.
$400K+
earned
John M.
$100/hr
100% Job Success
$300K+ earned
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John Morrison is a professional software engineer with over 20 years of experience. He has successfully led the creation and growth of industry awarded software titles for both desktop and mobile applications.
John M. has worked .
Viacheslav V.
$60/hr
100% Job Success
$1M+ earned
Available now
Offers consultations
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Top 1% on Upwork, Fractional CTO helping startups build scalable applications. 100+ products delivered | Companies we supported raised $14.5B+. Expert in React, Node.js, .NET, Python, API integrations, AI automation, and SaaS architecture. As a Fractional CTO and Solution Architect, I typically join projects when companies need to: • launch an MVP quickly • fix slow or disorganized development • design scalable product architecture • integrate APIs, automation, or AI features I work together with my team at Softermii, where we have delivered 100+ Web and Mobile products, helping companies that later raised $14.5B+ in funding. APEX – AI-Powered Product & Engineering System To reduce delivery risk and accelerate development, we use our internal framework APEX. APEX helps us validate product scope, architecture, timelines, and technical risks before heavy development begins. This allows us to: • structure the development roadmap • break features into clear engineering tasks • accelerate MVP delivery • reduce costly rework The result is faster product launches and more predictable development timelines. What I Can Help You Build ✔ Web Development (React, JavaScript, TypeScript, Node.js) ✔ Web Applications and SaaS Platforms ✔ Mobile App Development (iOS, Android) ✔ Marketplace Platforms ✔ API Development and API Integration ✔ Automation Systems ✔ Artificial Intelligence integrations ✔ Chatbot Development ✔ AI Agent Development Core Technologies Web Development JavaScript, TypeScript, React, Node.js, HTML, CSS, Web Design Backend & APIs Python, Node.js, REST APIs, API Integration, SaaS Architecture Mobile App Development iOS, Android, React Native Automation & AI Artificial Intelligence, Automation, Chatbot Development, AI Agent Development Industries • SaaS • FinTech • Healthcare • Real Estate • E-commerce Client Feedback “I would highly recommend Softermii for any programming needs. I am consistently impressed by the quality of the work and team effort brought forth by everyone that we've worked with.” — VP of Product, Dollar Shave Club “Softermii delivered the project on time and helped us launch a strong virtual platform that can compete with major solutions in the market.” — Director General, Event10x When Clients Hire Me • You need a Fractional CTO to lead development • You want to launch a Web or Mobile MVP quickly • Your current development team is too slow or disorganized • You need help designing scalable SaaS architecture • You want to integrate AI, automation, or APIs If you're building a Web platform, SaaS product, let's discuss your project.
Viacheslav V. has worked .
Softermii
Associated with
Softermii
$1M+
earned