👋 Hi! Looking for a Senior .NET Developer or Full Stack Developer who delivers scalable enterprise systems — not just working code? With 10+ years as a C# .NET Developer, .NET Core Developer, and Full Stack Developer, I design and build production-grade SaaS platforms, CRM systems, legacy migration pipelines, and AI-integrated web applications for FinTech, HealthTech, EdTech, and enterprise clients across North America and Europe. Whether you need a .NET Full Stack Developer to architect a greenfield SaaS product, a React Developer or Angular Developer to rebuild a frontend, or a Senior .NET Developer to modernize aging .NET Framework systems — I cover the full delivery cycle from architecture to deployment. 🏆 What Sets My .NET Full Stack Work Apart 10+ years as a Senior .NET Developer & Senior Full Stack Developer 15+ enterprise platforms delivered: SaaS, CRM, marketplace, portal, and booking platform builds .NET Core / ASP.NET Core / C# .NET architecture across microservices, MVC, and event-driven systems React Developer & Angular Developer — full frontend ownership with TypeScript and JavaScript AI Developer integrations: OpenAI API, Dify, GPT-based automation, AI Agent Development Legacy .NET Framework modernization to .NET Core with zero production downtime HIPAA & GDPR-compliant systems across MedTech, Gov, and FinTech verticals .NET MAUI & Xamarin cross-platform desktop application and mobile application builds API Integration specialist: Stripe, PayPal, GraphQL, REST, gRPC, and third-party SaaS APIs Cloud: Azure Developer & AWS deployments, Docker, Kubernetes, CI/CD pipelines Full Stack SaaS Developer across subscription, marketplace, and document management platforms WordPress Developer for custom business portals and CMS-driven web application builds Node.js & Next.js experience for high-performance API layers and server-side rendering Python Full Stack work on data-heavy analytics and automation pipelines JavaScript Full Stack delivery: React, Angular, Vue.js, Node.js — all in one team 🚀 Selected Projects Norwegian E-Learning Platform (EdTech SaaS) Built as Tech Lead and .NET Full Stack Developer using Vue.js, ASP.NET Core, Azure, and SQL. The Vignita platform scaled to 2,500 companies and 100,000+ employees, embedded in 10+ university programs nationwide. Affiliate B2B Platform "Affaim" (MarTech) Delivered as .NET Developer and Full Stack Developer — multi-tenant architecture, high-load SQL databases, secure partner portals, and Shopify integration. Python Full Stack layer for analytics and data pipelines. Global Payments System "WorldRemit" (FinTech) Migrated legacy .NET systems to modern microservices. Payment gateway integrations, global API layer, and real-time transaction management as .NET Core Developer and Full Stack Developer AI. AI Arbitrage Platform "Sellerbility" Full Stack Developer AI role — built automation logic, OpenAI integrations, React dashboards, and API-driven analytics modules. Multi-Platform Telemedicine System (HealthTech) Mobile App Developer and .NET Developer: .NET Core backend, Blazor, SignalR, Xamarin cross-platform mobile, GDPR-compliant data architecture. 🔧 Core Tech Stack Backend & .NET: C#, .NET Core, ASP.NET Core, ASP.NET MVC, ASP.NET Web API, .NET Framework, .NET MAUI, Blazor, WPF, Entity Framework, SignalR, OAuth2, LINQ, WCF Frontend: React, Angular, Vue.js, Next.js, TypeScript, JavaScript, jQuery, Bootstrap, Tailwind CSS, HTML5, CSS3 Databases: SQL Server, MySQL, PostgreSQL, MongoDB, Redis, Azure SQL, Supabase, Elasticsearch Cloud & DevOps: Azure, AWS, Docker, Kubernetes, Azure App Services, Azure Data Factory, CI/CD, Git API & Integrations: Stripe, PayPal, GraphQL, REST, gRPC, OpenAI, SendGrid, Google Maps, IronPDF, Crypto Exchange APIs, Zendesk, RevenueCat Mobile & Cross-Platform: .NET MAUI, Xamarin, Flutter, Supabase, Firebase Auth, Android, iOS AI & Automation: OpenAI API, Dify AI, AI Agent Development, AI App Development, Machine Learning integration, Python automation CMS & eCommerce: WordPress Developer, Shopify, WooCommerce, CodeIgniter, Laravel (PHP integration layer) 💡 Results at a Glance ✅ 100,000+ users onboarded via SaaS platforms I architected ✅ Legacy .NET Framework systems modernized to microservices with zero downtime ✅ HIPAA & GDPR compliance delivered across healthcare and government platforms ✅ AI integrations reducing manual processing workload by 60%+ ✅ Cross-platform desktop application and mobile application shipped from a single C# codebase ✅ 12+ payment gateway and API Integration implementations across FinTech and eCommerce ✅ Database architecture supporting 100M+ records with sub-200ms query performance Open to Senior .NET Developer, C# Developer, .NET Core Developer, Full Stack Developer, React Developer, Angular Developer, Full Stack SaaS Developer, AI Developer, JavaScript Developer or Web Developer engagements — long-term preferred, fixed-scope welcome. 📆 Last Updated: 06/26

You need software that solves a real problem, built right the first time, by people who understand your business and not just your stack. I'm Orest, founder of SoftDoes. We're a U.S.-based custom software firm working with: • Non-technical founders with a vision • Technical leaders who need help but not additional headcount • Business operators solving operational complexity Our team has delivered across healthcare, fintech, construction, legal, real estate, and regulated industries where compliance-readiness is required and getting it wrong isn't an option. Our clients tend to show up in one of three situations: they have a product vision and need someone to build it, they have internal engineering that's stretched too thin, or they have operational complexity that off-the-shelf software simply can't fix. We've handled all three. What we deliver: • Custom software and SaaS platforms built for scale • AI implementation and automation built into real workflows • Web and mobile applications • Cloud infrastructure on AWS, GCP, and Azure • Full-stack development across React, Next.js, Node.js, and Python What clients tell us, consistently: we listened, we delivered what we said we would, and they didn't have to babysit us to get there. A healthcare founder went from concept to a live, compliant product in under six weeks. A construction company replaced five fragmented tools with one custom operations platform. A fintech team cut onboarding time in half with an AI-assisted workflow we built in a single sprint. We work best with companies that are big enough to need real software and clear-eyed enough to know that building it wrong the first time costs more than doing it right. If that's where you are, let's talk. 🇺🇸 U.S.-based. U.S.-led. Kansas City, MO. Services: Custom software development SaaS development Enterprise software Web application development Mobile app development Full-stack development Product development / MVP build Platform modernization / rebuild Systems integration Workflow automation Business process automation API development / API integration Backend development Frontend development AI development AI integration AI automation LLM integration RAG (Retrieval-Augmented Generation) AI chatbot development Document AI AI-powered workflows Prompt engineering AI agents Data extraction automation React Next.js Node.js Python TypeScript JavaScript REST APIs GraphQL PostgreSQL AWS Google Cloud (GCP) Microsoft Azure Vercel Docker Terraform CI/CD Cloud / DevOps keywords Cloud architecture Infrastructure as code DevOps Deployment automation Scalability / performance optimization Reliability engineering Monitoring / observability HIPAA compliance / healthcare software PCI / fintech software SOC 2 readiness (if applicable) Security best practices Compliance-ready systems Audit-friendly systems Role-based access control (RBAC) Operations platform Internal tools CRM/ERP custom build Data pipelines Dashboards & reporting Process digitization Tool consolidation Onboarding automation

🔵 14+ years developing first-class web, mobile and AI apps that achieve business goals and hit the mark. As an AI developer and web developer, my expertise led my team to work with Fortune 500 companies such as Philip Morris, Coca-Cola, DANONE, McDonald’s (Ukraine), and Kimberly-Clark. I started as a programmer in 2006. Now, I'm CTO at Brights — a software company focused on web, mobile and AI products, with 120+ Mobile app developer s and Web developer s who specialize in AI Chatbot systems, advanced AI Integration solutions, AI Saas and Mobile app development. As a deal closer, I also work closely with clients during product strategy and delivery. At Brights, we support companies through every stage of development backed by experienced AI developer, AI Chatbot, AI API Integration, Mobile app developer, and web developer — from MVPs to scaling including AI developer | AI Chatbot | AI API Integration | Mobile app developer. Our experience includes API integration, complex API integrations, and enterprise-grade AI API Integration. Within the last 14 years, I have delivered 300+ projects across fintech, insurtech, healthcare, eCommerce, real estate, education, logistics, and more as an AI developer | AI Chatbot | AI API Integration | Mobile app developer. 👩‍💻 Technical stack I cover as an AI developer | AI Chatbot | AI API Integration | Mobile app developer: Front-end: • Vue.js, React, Angular, Next.js, Redux, react native Back-end: • ASP.NET, PHP, Node.js, GraphQL Mobile: • React Native, iOS, Android, with support from a dedicated Mobile app developer and Flutter developer as well as Mobile game developer Artificial Intelligence tech stack I cover as an AI developer | AI Chatbot | AI API Integration: • Python developer workflows, LangChain, GPT-4o, gpt-3, OpenCV, Hugging Face, RAG, LLM, AI machine learning, and scalable machine learning pipelines Data & Architecture: • PostgreSQL, MongoDB, Redis, Elasticsearch for both mobile app marketing and web • Supported by experienced data scientist and full stack developer teams Integrations: • Analytics, CMS, Swagger, botpress, chatbots, AI API, and automation systems with reliable API integration If you are looking for AI developer | AI Chatbot | AI API Integration or Mobile app developer with strong mobile app design experience (Figma mobile app) - drop me a line.

As a seasoned innovator and software development expert from New York, with over 28 years of experience, I have a strong track record of success in creating innovative and high-quality products. My expertise lies in Windows-based software development using C++, as well as in medical software, medical billing codes, HIPAA compliance, artificial intelligence, internet of things, and low-level programming such as kernel drivers. I also have a deep understanding of cyber security, cyber intelligence, vulnerabilities assessment, security research, encryption, blockchain, and cryptography, and have developed several unique platforms in these areas. Throughout my career, I have taken projects from concept to completion, turning ideas into mature and successful products. In addition to my hands-on experience, I am also an author, having written a C++ bestseller and currently working on a new book for a major publisher. I am eager to take on exciting and challenging projects and put my skills and experience to work for you. If you are in need of a skilled and innovative software developer, I would be happy to discuss your project further. I am a BBB Accredited business and a Microsoft Supplier, among my clients: Sony, IBM, OpenAI, Pixm Security, Deep Code, Security Snares and more. I have experience in medical applications, review and assign correct CPT codes to medical procedures, comply with Epic and Cerner requirements and use AI for such applications. I am a member of HTCIA.

⚡ 14-Day MVP Delivery – Your production-ready mobile app launched in 2 weeks, not 2 months 🏆 Former Apple iOS Engineer – Silicon Valley standards meet startup speed for investor-ready applications 📱 70+ Apps Launched – Proven track record turning founder ideas into funded businesses on iOS and Android Need Expert Mobile App Development That Actually Delivers on Time? I'm a former Apple iOS engineer offering professional mobile app development for startup founders who need results fast. While other mobile app development agencies take 3-6 months and disappear mid-project, I deliver market-ready MVPs in 14 days or less. No crashes. No excuses. No communication gaps. I've successfully launched 70+ applications across the iOS App Store and Google Play Store through strategic mobile app development. But here's what matters more: I've helped multiple founders turn their ideas into investor-ready apps that secured real funding. One client came to me after their previous mobile app development team ghosted them 3 months into the project. They had an investor meeting in 2 weeks and nothing to show. I rebuilt their entire native app from scratch in 13 days using React Native. The app worked flawlessly in their pitch. They closed $500K in seed funding. That's the difference between a developer who codes and a developer who understands your real goal isn't just an app – it's launching your business before competitors beat you to market. I use test-driven mobile app development methodology with enterprise-grade architecture, so your app doesn't just work on day one. It scales as your business grows. You get weekly progress builds for continuous feedback, and I respond to messages within hours, not days. No more chasing developers who went silent. Whether you need iOS development, Flutter development, or cross-platform solutions with React Native, my mobile app development services deliver apps that look professional, function perfectly, and stay within your budget. No surprise costs. No endless revisions. Just a clear timeline and a finished product that's ready to make you money. Mobile App Development Services: - iOS App Development (Swift, native iOS development) - React Native Development (cross-platform iOS & Android apps) - Flutter Development (modern, scalable mobile applications) - MVP Development (investor-ready apps in 14 days) - Mobile App Design (professional UI/UX that converts) - App Store & Google Play Deployment (end-to-end launch support) Ready to Launch Your App Fast? If you're tired of mobile app development projects that drag on for months, developers who disappear, or apps that crash when you need them most – let's talk. Send me a message with your project details, and I'll show you exactly how my proven mobile app development process can get your app built, tested, and launched in 14 days. Every successful mobile app development project starts with a conversation. Your competitors aren't waiting. Neither should you.

HighPower Data Solutions provides customized FileMaker solutions for businesses to access their data on mobile, web, and desktop. We also provide website development and backend support. As a certified FileMaker Pro developer, HighPower has been developing commercial FileMaker solutions since the mid 1990's. We can provide a great database solution for you and your business. We are based in Minneapolis, MN and certified by FileMaker. We will provide you with Excellence, Value, and Confidentiality. Is your FileMaker running slow? Download a free FM Speed report at filemaker-speed.com

✅ 12 years of development experience in the IT industry 🎓 Master's degree in Information Technology. ✅ Microsoft Certified Professional Areas of specialization: 💎 Web Development 💎 Dynamics 365 CE 💎 Mobile Development for iOS / Android / Cross-platform 💎 Desktop Development for Windows 💎 UI / UX Design 💎 VR & AR Development using Unreal Engine / Unity 3D 💎 Project / Product Management 💎 Technical Oversight, Solution Architecture

$53M+ Raised by Clients | 84+ Products Delivered | 100% Job Success | 14 Years in SaaS ✅ 14 years as CTO & Founder of Gearheart, Enterprise SaaS product development studio ✅ Co-Founder & CTO at Beyond the Wow, an AI-native MVP studio ✅ Helped 84+ startups and growth-stage SaaS teams scale their products ✅ Built SmartSuite from scratch — $38M raised, 7M+ users ✅ 2–4x faster delivery using Claude Code, Lovable, Cursor, and Replit ✅ Top Developer at Clutch and Goodfirms I'm a CTO with 20 years of engineering experience, specializing in Python Full Stack Developer SaaS and Full Stack Developer React architecture. I've learned that most founders don't fail because they can't build, they fail because they build the wrong thing. My job is to make sure that doesn't happen to you. As an MVP Developer, I focus on SaaS architecture and MVP Development — taking products from idea to live in weeks. My team delivers Full Stack Developer React and Python engineering with AI API Integration built in by default. Behind me is a team of 23 senior engineers with 14 years in SaaS — together we've shipped 84+ products for 70+ clients across 7 countries. Whether you need AI SaaS Development, a lean SaaS MVP, or full-scale SaaS Business Development — we bring both the speed and the engineering depth to make it production-ready. 🌟OUR ENGINEERING STANDARD Our standard for MVP Development comes from Gearheart, where we've spent 14 years as a SaaS Developer studio building enterprise products: - SmartSuite — SaaS Developer and MVP Development from scratch: $1.2M ARR in 4 weeks, $38M raised, trusted by Capital One. Coordinated with up to 4 external teams simultaneously - Globalli — Python Full Stack Developer SaaS and SaaS Developer project: HR/payroll across 125+ countries, SOC2 Type II, $15M raised. 15+ modules, 21 engineers at peak, 3 years 🔧 WHAT I CAN HELP YOU WITH - Discovery & Prototype: For every MVP Developer engagement — clickable prototype in 5 days using AI Development tools: Lovable, Replit, Cursor - Rescue Diagnosis: Code broken in production? Full review by senior Full Stack Developer React and AI Development engineer. QA, security audit, sprint plan - MVP & Landing Page: MVP Development in 3 weeks — 2–4x faster than traditional agencies. AI API Integration, auth, onboarding, deployment included - Sprint Subscription: Ship features on a regular sprint pace. Your long-term Full Stack Developer React, SaaS Developer and MVP Developer partner ⚡ OUR MVP SPEED - Legal SaaS platform + AI API Integration knowledge base → ~2 months - AI Receptionist with AI API Integration + CRM → shipped in weeks - B2B Dental Referral SaaS — MVP Developer delivery → 3 weeks - Medical device MVP Development — ICP + PMF + build → 2 weeks 💡WHY WORK WITH ME - Product Thinking First: We start at "should you build this?" not "what do you want us to build?" Most developers skip this entirely. We don't - AI Speed, Engineering Quality: We use Claude Code, Lovable, and Cursor as engineers, not prompt writers. AI Development is 2–4x faster without sacrificing production readiness. Need AI SaaS Development or MVP Development? We do both - We're Startup Founders Too: As founders ourselves, we know firsthand the challenges you're facing — including where AI Development fits and where it doesn't - Offshore Pricing, Enterprise Standard: Ukraine-based SaaS Developer team. Competitive pricing. Enterprise-level SaaS Developer quality — delivered by Python Full Stack Developer SaaS and Full Stack Developer React engineers who've built at scale Our team has delivered AI SaaS Development projects, Full Stack Web Developer builds, and App Developer with AI integrations — enterprise standard Our engineers cover the full stack: Software Developer tooling, REST API architecture, Web Developer interfaces, App Developer delivery. Whether you need a React Developer who owns the full product or a team that scales with you — we've done it both ways. We've worked with 70+ clients as an MVP Developer and SaaS Developer team — from early-stage founders to growth-stage companies across 7 countries. 30% return for their next product. Our Python Full Stack Developer SaaS and Full Stack Developer React engineers have built systems where AI Development is not optional — it's the delivery model. AI API Integration is embedded in every MVP Development sprint from day one. As an MVP Developer team: $400K+ on Upwork | 100% Job Success. AI Development and Python Full Stack Developer SaaS approach gives you depth without agency overhead. ⚙TECH STACK AI & Integration: AI API Integration: Claude Code, OpenAI, FastAPI, LangChain Frontend: Full Stack Developer React: React, TypeScript, Next.js, Vue.js Backend: Python Full Stack Developer SaaS: FastAPI, Django, Node.js, GraphQL, PostgreSQL DevOps: AWS, DigitalOcean, Docker, Kubernetes Every Python Full Stack Developer SaaS project we take on includes MVP Developer speed, AI Development, and AI API Integration by default

I am an educated (university level with Microsoft and Symantec certificates) and experienced software and web developer (Visual C#, ASP.NET(Core), SQL Server, Kendo UI, JavaScript, OpenAI, React, Angular, NodeJS ) located in Serbia. I have extensive experience building Windows, web applications, database solutions, and scrapers. I can work as a standalone developer or as part of a team.

I help B2B companies replace spreadsheets, manual workflows, and disconnected tools with full-stack development, custom software development, system integrations, and workflow automation. Most of my work is focused on B2B SaaS development, custom SaaS solutions, logistics systems, operations platforms, and AI-powered automation that solves real business problems. With 15+ years in full-stack web development and 250+ delivered projects, I work as a founder and technical lead. I partner with clients in logistics, B2B services, and eCommerce to build custom CRM platforms, internal business systems, management systems, and operational software that reduce manual work, improve visibility, and give teams a more reliable way to run day-to-day operations. I'M A GOOD FIT IF • Your team still relies on Excel, Google Sheets, shared documents, or email threads to manage important workflows; • Your current SaaS platform, CRM, ERP, WMS, or internal business system has become hard to change and needs stronger technical direction; • You need a reliable full-stack development partner for API integrations between your internal systems and marketplaces, shipping carriers, payment gateways, or AI services. WHAT I BUILD • Full-stack development for custom B2B SaaS platforms, CRM solutions, and internal operations tools; • Logistics systems and fulfillment software, including TMS, route planning, dispatcher dashboards, cargo planning, warehouse management views, and inventory workflows; • System integrations, business process automation, and AI-powered automation that keep data in sync and reduce repetitive manual work. Recent examples include a TMS for 3PL and eCommerce fulfillment, a multi-source marketing analytics platform, and an AI-assisted translation workflow system. HOW I USUALLY WORK • Review your workflows, constraints, and required integrations, then define a clear scope and milestone plan; • Deliver iteratively with demos, staging, and QA before release; • Support stabilization, handover, documentation, and further improvement after launch. My full-stack development work usually covers backend architecture, frontend implementation, databases, API integrations, deployment, and long-term system support. CORE STACK: Laravel/PHP, Node.js, Vue, React, TypeScript, MySQL/PostgreSQL, AWS, Docker, REST/GraphQL, and integrations with marketplace, payment, shipping, and AI APIs. If you already have a project in mind, send me 3 - 5 sentences about your current workflow and what you want to improve. I'll reply with initial fit, a possible direction, and a rough budget/timeline range.