As a Full Stack AI Engineer, over the past 10 years, I've helped 100+ clients turn their ideas into revenue generating products. From early stage MVPs that went on to raise millions in funding, to AI powered SaaS platforms that scaled to thousands of users I'm a Top Rated Plus (i.e. Top 3% talent on Upwork) freelancer with $600K+ earned on Upwork and a 100% Job Success Score across various completed contracts. I don't just write code, I partner with founders and business owners to build products that actually move the needle for their business What I do best: AI & Generative AI: I integrate OpenAI, Claude, Gemini, and LLaMA into real products. From intelligent chatbots and document processing to custom AI workflows using LangChain and RAG pipelines, I build AI features that solve actual business problems, not just demos Full Stack Product Development: Whether it's a React/Next.js frontend, a Node.js or Django backend, or a React Native mobile app, I handle the full stack. I've shipped production apps in healthcare, fintech, e-commerce, and edtech DevOps & Infrastructure: I set up CI/CD pipelines, containerized deployments with Docker and Kubernetes, and cloud infrastructure on AWS, GCP, and Azure so your product scales reliably from day one How I work: I run every engagement with sprint planning, daily progress updates, and transparent communication through JIRA or Trello. You'll always know exactly where your project stands I focus on delivering within your budget and timeline, which is why clients keep coming back Best fit for: Startups building their first MVP, SaaS companies adding AI capabilities, and growing businesses that need a senior technical partner who can own the entire product development lifecycle

My clients emphasized my ability to quickly dive into projects and deliver results aligned with requirements and acceptance criteria within the required timeframe. Greetings! I am a Senior front-end developer with a proven track record in React.js, Angular, JavaScript, HTML, and CSS. Finished 39+ projects. 5500+ happy hours, full of challenging tasks, crucial moments, and fun. From an idea to the final launch, I've got you covered. Please feel free to write to me before the project. ⭐⭐⭐⭐⭐ "Vitalii is a person to cooperate with for those who care about their time, money, quality of work, deadlines, and want to avoid hustling. I was impressed by his ability to dive into the context of tasks, finding the right approach for a particular task, asking the right questions, and providing updates on a daily basis. Everything went smooth from the very first message to the final result. We were able to rump up the developing process, improve the code base without the need for big rewrites, and all within just a week with Vitalii's help. His architecture skills and experience have helped us to find the right way for developing the last milestone which was quite tricky and complicated." - Daniel Turczański, Entrepreneur, JQL Search Extensions. Upd: 25.07.25 Why you should choose me over other front-end developers: 🏅 Top Rated Plus Front-End Developer - ONLY 3% on Upwork 🎯 All projects have successfully finished with five-star feedback ✅ Certificates from Microsoft and Udemy ⚡ Immediate answers to any contract/invite in less than three hours ⌚ Available for RUSH projects and calls You will get more than just a front-end developer: - Top-notch experience in Front-end development (React, Angular, JavaScript, Typescript, HTML, CSS) - Proven soft and hard skills - Ability to quickly dive into the project and deliver results within a minimum time frame - 24/7 availability for communication and support - Hustle-free environment for your ideas - An individual deeply committed to your success and adding value to your enterprise --- Keywords: Front End Developer, Front End Development, Front End, React, React.js, TypeScript, JavaScript, JS, Redux, Redux Toolkit, React Hook Form, React Query, React Table, React Router, React Bootstrap, Material UI, MUI, Angular, Angular.js, Angular 8, Angular 9, Angular 10, Angular 11, Angular 12, Angular Material, Ng Bootstrap, NgRx, RxJS, Ng cli, Nx cli, Next.js, SSR, SSG, SWR, App Router, Pages Router, Tailwind CSS, Tailwind, Radix UI, Shadecn UI, Styled Components, CSS Modules, HTML, HTML5, CSS, CSS3, Twitter Bootstrap, Bootstrap, Sass, Less, Scss, Webpack, Vite, Vite.js, Vercel, Cloudflare Pages, API, REST, Graphql, Jira, Asana, Shortcut, GitHub, BitBucket, GitLab, Figma, Zeplin, Adobe XD, Landing Page, SaaS, MVP, PoC, Startup, Product, Enterprise.

I build scalable, high-performance web applications that drive business results and keep users engaged. With 8+ years of full-stack development experience and 100% Job Success on Upwork (19 completed projects), I specialize in MEAN Stack development—Angular, Node.js, MongoDB, and PostgreSQL—creating robust applications that scale with your business. 🔧 Technical Expertise: - Frontend: Angular, TypeScript, responsive UI/UX implementation - Backend: Node.js, Express, RESTful APIs, microservices architecture - Databases: MongoDB, MySQL, PostgreSQL - Python: Data processing, automation, backend development - Testing: Unit testing, integration testing, quality assurance ✅ What Sets Me Apart: - Clear communication throughout the project lifecycle - Clean, well-documented code following best practices - Rigorous testing for bug-free applications - On-time delivery with attention to detail - Custom solutions tailored to your specific business needs Ready to discuss your project? Let's schedule a free consultation to explore how I can help achieve your goals.

😣 Tired of AI-generated text? 📞 Let's talk for real. 🎯 Forget fancy profile descriptions I focus purely on results. 🔥 ACHIEVEMENTS ✔️8+ years and 42+ products as a Full Stack Developer React Node in SaaS Platform, MVP, AI-Powered and Web Application delivery ✔️$3.8M+ client impact, $900K+ direct revenue, €420K paid MVP orders, £11M annual business volume as a React Developer ✔️20,000+ active users across Web + Mobile Apps where Frontend React Developer execution with n8n supabase lifted engagement by 18–27%. ✔️10,000+ users in Healthcare Web Application and HIPAA-Compliant systems where Frontend React Developer (flutterflow, v0, aws) ownership cut admin friction by 40%. ✔️2,423 completed orders, 489 registered customers, 34% faster handling in Ecommerce Website and CRM Platform MVP as a Full Stack Developer React Node. ✔️90% faster order processing, 80% lower manager workload, 65% fewer back-office actions through Workflow Automation, Document Workflow, and Frontend React Developer improvements. ✔️1,666+ catalog items, 4-role access, 2.7x operational capacity in B2B Marketplace and Registration and CRM System as a Full Stack Developer React Node. ✔️5–8 weeks shorter MVP to Pilot Launch, 35% fewer bugs through Existing Codebase and Productionise work as a Full Stack Developer React Node ✔️$900K+ in client revenue as react next js developer, and 8 years of experience as web app developer react / react app developer ✔️8+ yrs. Senior Full-Stack Engineer ✔️$3.8M+ client impact, end-to-end ownership as Full Stack Developer React Node ✔️20+ interfaces, 18–27% engagement lift, clarity and trust as Frontend React Developer ✔️30–40% faster cycles, cleaner UX, stronger retention across SaaS Platform products as React Developer 🚚 WHERE I DELIVER ✔️As a Frontend React Developer - 20+ systems with UI Development, UI/UX, Dashboard Build, Responsive UI Build across SaaS Platform, Booking Platform, Ecommerce Website. ✔️As a React Developer - 15+ launches in full stack developer nextjs environments, 30–40% faster iteration through Design-to-Code and Component Development. ✔️As a Full Stack Developer React Node - 25+ end-to-end builds with Backend API, Backend System Development, Data Architecture, Secure, Scalable architecture from Early-Stage MVP to Live SaaS Platform. ✔️As a frontend developer react, front end developer react, react native expo - web design, UI Polish ( ux designer ), front end development improving conversion by 15–22%. ✔️10+ deployed mobile app in app and google play store as react native developer expo, react native app developer. ✔️ 12–19% better repeat usage through booking, notifications, payments as front-end developer flutter and mobile app developer. ✔️As a frontend developer angular, python developer, python full stack developer django - 12+ backend-heavy products, 28% lower delivery risk. ✔️As a Full Stack Developer React Node - 6–18 month cycles through Scale Existing Platform, Professionalize & Scale, Review, Improve & Launch as a Long-Term Development Partner. ✔️As a full stack react developer and full stack developer supabase react - 99%+ delivery consistency across distributed teams. ✔️10+ projects with twilio api in full stack development (full stack developer supabase) 🏆 INDUSTRY IMPACT - Marketplace Platform, B2B Marketplace, Two-Sided Marketplace, B2B Services - thousands of listings, 20%+ better lead quality as a Frontend React Developer and Full Stack Developer React Node. - Healthcare Web Application, Clinic Management SaaS, Telehealth, HIPAA-Compliant - 10,000+ users, 25%+ better staff capacity as a Frontend React Developer - AI-Powered - 5+ products, Custom AI Solutions, AI Agent Platform, AI Chatbot, RAG Chatbot, OpenAI, Claude API, FastAPI as a React Developer and Full Stack Developer React Node. - Logistics Platform, ERP, Internal Workflow Management System, Owner Dashboard - hours saved per order cycle, 30%+ faster reporting as a Full Stack Developer React Node. - Research Platform, LegalTech SaaS, Fintech MVP, PropTech MVP - 18% better adoption through Frontend React Developer quality and structured permissions. - Wellness Marketplace, Rental Platform, Automotive Marketplace - scalable Multi-Vendor Ecommerce and React PWA patterns, 3–5 weeks faster time-to-market. ⚒️ HOW I BUILD ✔️25+ products as a Frontend React Developer: java react, react.js, react native mobile, react next tailwind frontend, javascript, typescript, html, html5, css3, Tailwind CSS, React Bootstrap frontend, Responsive Design, jQuery. ✔️15+ systems as a Full Stack Developer React Node: supabase postgres, laravel, MySQL, MongoDB, firebase, stripe. Integrations across payment, maps, auth, and third-party APIs. ✔️10+ ecosystems: wordpress developer, shopify, web3 frontend, php, .net, flask, vue.js, svelte, webflow, mern stack as a react js developer and react web developer. ✔️40+ products: git, Software Development, Software Architecture & Design, Front-End Development with engineer mindset.

I help startups and businesses build scalable, high-performance web applications using Nextjs, React, Angular, and Node.js. ✔ 6+ years experience ✔ Built production apps in healthcare, eCommerce, and SaaS ✔ Focus on performance, scalability, and clean architecture If you need a developer who can turn your idea into a reliable product — I can help. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲 I specialize in full-stack development and hybrid mobile solutions, with expertise in: ✅ Angular (Universal, Material, PWA, SSR) ✅ ReactJS and React Native ✅ Node.js, Next.js, PHP, Laravel, and WordPress ✅ Ionic Framework (Ionic 2, 3, 4+) ✅ JavaScript / TypeScript, HTML5, CSS3, Bootstrap ✅ Databases: MySQL, MongoDB ✅ AWS and cloud integrations ✅ Version control with GitHub, GitLab, and Bitbucket 𝗔𝗜 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 I also have a solid background in AI, helping businesses integrate innovative technologies: ✅ AI chatbots and automation ✅ Machine learning and NLP solutions ✅ AI-powered APIs and personalised web apps 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? Over the years, I’ve completed 20+ projects for industries like Healthcare, Education, eCommerce, and Marketplaces. My clients trust me to deliver scalable, user-friendly, and efficient solutions tailored to their business needs. 𝗠𝘆 𝗪𝗼𝗿𝗸 𝗣𝗿𝗼𝗰𝗲𝘀𝘀 Here’s how I like to work: 𝗨𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱𝗶𝗻𝗴 𝗬𝗼𝘂𝗿 𝗚𝗼𝗮𝗹𝘀: I start by gathering all the details about your project and creating a roadmap. 𝗖𝗵𝗼𝗼𝘀𝗶𝗻𝗴 𝘁𝗵𝗲 𝗥𝗶𝗴𝗵𝘁 𝗧𝗼𝗼𝗹𝘀: I suggest the best technologies and estimate timelines based on your needs. 𝗔𝗴𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: I break the project into sprints and keep you in the loop with regular updates. Quality First: I test everything thoroughly to ensure you get a bug-free, polished product. ✊ 𝗟𝗲𝘁’𝘀 𝗖𝗿𝗲𝗮𝘁𝗲 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗔𝗺𝗮𝘇𝗶𝗻𝗴 I’m confident, reliable, and easy to work with. If you’re looking for someone who can turn your ideas into reality, I’d love to be your partner. Let’s connect and discuss how I can help bring your project to life!

I am a GIS Analyst and Full-Stack Developer with extensive experience in building high-performance map services, processing drone imagery, and developing complete web applications. My combined background in geospatial technologies and modern software development allows me to deliver end-to-end solutions, including data processing, map publishing, and fully functional web dashboards. I specialize in publishing and optimizing WMS, WMTS, WFS, and TMS map services, processing orthomosaics, DEMs, and DSMs using Agisoft and Pix4D, and building spatial databases with PostgreSQL and PostGIS. I work confidently with QGIS, ArcGIS Pro, GeoServer, Mapbox, and other industry-standard tools. I can clean, prepare, and analyze GIS datasets, create custom vector tiles and basemaps, and design scalable GIS pipelines. As a full-stack developer, I build complete web applications using Node.js, Express, React, TypeScript, and Next.js. I develop custom mapping dashboards, REST APIs, authentication systems, and admin panels. I also automate geoprocessing workflows and integrate GIS data into modern web platforms. My project experience includes national land-use map services, drone orthomosaic WMTS systems for mining, real-time GPS tracking dashboards, cadastral map services with parcel search, environmental monitoring platforms, and custom urban planning basemaps. Clients work with me because I combine GIS expertise with software engineering skills, allowing me to deliver complete solutions from raw data to production-ready applications. I focus on performance, accuracy, clear communication, and reliable delivery. If you need a specialist who can process GIS data, publish map services, and build robust web applications around geospatial systems, I can provide a professional and scalable solution tailored to your project.

I help businesses turn complex ideas into fast, scalable web applications and AI-powered products. My main stack revolves around JavaScript / TypeScript ecosystems, modern frontend frameworks, and reliable backend architecture designed for real production environments. I have 7 years of experience in full-stack engineering. Over the past years, I’ve worked on SaaS platforms, enterprise tools, and high-traffic web systems, building features from concept all the way to deployment. 🔹 Full-Stack Development I build complete web systems using React, Next.js, and Angular on the frontend, combined with Node.js and TypeScript on the backend. My goal is always the same: clean architecture, maintainable code, and systems that continue to scale as products grow. 🔹 AI Integration I also develop AI-driven features such as automated reporting, intelligent assistants, data transformation tools, and AI workflows using modern LLM and OpenAI integrations. These solutions help automate processes and turn unstructured data into useful insights. 🔹 Backend & Data Architecture On the server side I work with Node.js, GraphQL, REST APIs, and modular backend systems. For data storage I design scalable models using PostgreSQL, MySQL, and MongoDB, ensuring reliability, performance, and efficient data handling. 🔹 Infrastructure & Modern Development I deploy and maintain systems using Docker, AWS, CI/CD pipelines, and structured Git workflows, ensuring stable production environments and smooth team collaboration. 🤝 How I Work I collaborate closely with founders, product teams, and designers to turn ideas into working software. Clear communication, transparent progress updates, and scalable technical decisions are core parts of my development process. 🚀 Why Work With Me I focus on building reliable, scalable systems that support real business growth, combining full-stack engineering with modern AI capabilities to create products that are both powerful and future-ready

Expert-Vetted (Upwork Top 1%) I help companies design, validate, and ship AI products fast with a strong focus on AI Agents, Generative AI, and production-ready ML systems. I’m an AI Developer, AI Engineer, and fractional CTO with 8+ years in Machine Learning and software architecture. My work focuses on building AI-powered products that move from idea to working MVP in 4-8 weeks using a structured delivery approach. As a co-founder of Softermii, a full-cycle AI and custom software development company, I lead teams that turn AI strategy into deployed systems - from data pipelines and LLM orchestration to scalable backend architecture and enterprise integrations. 🚀 Core Focus - AI Agent Consulting & Delivery I provide consulting and implementation for agentic AI systems that observe, reason, and act across business workflows. This includes: • AI Agents & Autonomous Workflows • LLM-powered Products and Copilots • RAG Systems and Knowledge AI • AI Orchestration Architectures • AI Integration into existing platforms • AI MVP validation and architecture design My approach combines strategy, architecture, and delivery - helping companies avoid costly overengineering and ship production-ready AI faster. 🧠 What I Deliver • AI Consulting and Technical Strategy • Agentic AI System Design • Generative AI Development • Machine Learning and Predictive Analytics • AI App Development and Automation • NLP, Computer Vision, and Data Science • Enterprise AI Integration and Modernization I work across Healthcare, FinTech, Logistics, Real Estate, and E-commerce, building systems that improve operations, reduce manual work, and unlock new revenue streams. 🏢 About Softermii Softermii is a full-cycle AI development company delivering enterprise AI systems with measurable business impact. We handle the full lifecycle - discovery, architecture, model development, integration, deployment, and optimization. Our work includes: • AI MVPs in 4–8 weeks using structured delivery methodology • HIPAA / SOC2 / GDPR-ready solutions • AI integration with ERP, CRM, and legacy systems • Dedicated AI teams and fractional CTO leadership ⚙️ Technologies Python, TensorFlow, PyTorch, LangChain, LLM APIs (OpenAI, Claude, Gemini), AWS SageMaker, Vertex AI, Docker, Kubernetes, MLOps pipelines, vector databases, real-time AI systems. If you’re looking for a partner who can design the right AI solution and actually ship it, let’s talk.

I'm Sweta Mistry. I've been working as a full-stack engineer for 14.8 years. Most of my work is around SaaS products, internal tools, and AI web apps. I usually work with React and TypeScript on the front end, and Python/FastAPI on the back end. PostgreSQL and MongoDB depending on the project. A lot of teams bring me in when the product is growing but delivery has started getting messy. Releases become unpredictable, features take longer than expected, or the codebase becomes hard to work with. I help clean that up and make things easier to ship and maintain. For AI features, I've worked with OpenAI, LangChain, RAG pipelines, and vector databases. Mostly for chat, internal assistants, search, workflow tools, and retrieval-based features. Infra side, I work with AWS, Docker, Kubernetes, and CI/CD pipelines. I usually set up logging, health checks, alerts, rollback flow, and migration checks as part of delivery. Things I can help with: ⦾ React + TypeScript front ends ⦾ Angular ⦾ FastAPI and Python back ends ⦾ OpenAI and LangChain integrations ⦾ RAG and vector search features ⦾ PostgreSQL and MongoDB ⦾ Docker, Kubernetes, AWS, and CI/CD ⦾ Refactoring older codebases ⦾ Stabilizing release cycles and delivery flow ⦾ Auth systems and third-party integrations How I usually work: ⦾ Quick discovery first ⦾ API spec or prototype early ⦾ Weekly demos and updates ⦾ Clean PRs and tested releases ⦾ Clear estimates and communication I'm open to contract work, full-time roles, and freelance projects. Happy to start with a small pilot first if you want to evaluate fit.

I build production-grade SaaS platforms using .NET and Angular from healthcare systems and job portals to real-time AI project management tools and enterprise business applications. These are scalable, production-ready systems designed for real users and real business operations, not prototypes or short-term workflows. I help startups and businesses turn ideas into working SaaS products and internal platforms, whether it's building from scratch, modernizing legacy systems, or scaling existing applications. My focus is simple: strong architecture, clean execution, and software that performs reliably in production. WHAT I BUILD • AI SaaS Products • AI Agents & Business Automation • Custom Web Applications • Internal Business Platforms • Customer Portals & Dashboards • Workflow Automation Systems • MVPs for Startups • Enterprise Applications RECENT PROJECTS ✓ AI-powered document processing platform that reduced manual review time by over 80% ✓ AI customer support assistant integrated with business workflows and knowledge bases ✓ SaaS platform for operational management built with ASP.NET Core, Angular, and Azure ✓ AI-powered data extraction and analysis solution that automated repetitive business processes ✓ End-to-end SaaS MVP launched from concept to production within weeks ✓ Multi-tenant business platform serving thousands of users with role-based access and subscription management TECHNOLOGIES AI & Automation OpenAI • Claude • AI Agents • RAG • LangChain • Vector Databases • Workflow Automation Backend C# • .NET • ASP.NET Core • Web APIs • Microservices • Entity Framework • SQL Server Frontend AI engineer, Angular • React • TypeScript • JavaScript • Responsive UI Development Cloud & DevOps Azure • AWS • Docker • CI/CD • Application Monitoring WHAT YOU GET When you hire me, you're not hiring someone to simply write code. You're getting a technical partner who can: • Translate business requirements into working software • Design scalable SaaS architectures • Integrate AI where it creates real value • Build maintainable systems that can grow with your business • Deliver production-ready solutions instead of prototypes that need rebuilding I work across the entire development lifecycle, from architecture and development to deployment and optimization. Whether you need an AI-powered SaaS platform, a modern .NET application, or a complete MVP built from scratch, I focus on creating solutions that save time, increase efficiency, and support long-term growth. Send me your idea, current challenge, or project requirements, and I'll help you identify the fastest path to a working solution. ----------------------- Keywords: .NET developer, C# developer, ASP.NET Core developer, full-stack .NET developer, Angular developer, .NET Angular developer, SaaS developer, .NET 8, Web API developer, Entity Framework Core, SQL Server, Microsoft Azure, Azure Functions, Azure App Service, microservices, Clean Architecture, CQRS, OpenAI integration, Azure OpenAI, ChatGPT integration, AI chatbot, RAG, LangChain, vector database, multi-tenant SaaS, Stripe integration, subscription billing, Identity Server, OAuth2, JWT, REST API, TypeScript, RxJS, NgRx, Angular Material, Tailwind CSS, Docker, CI/CD, Azure DevOps, GitHub Actions, .NET Framework migration, legacy modernization, performance optimization, EF Core optimization, senior .NET engineer, Top Rated .NET freelancer .net developer, C# developer, ASP.NET Core developer, full-stack .net developer, Angular developer, .net Angular developer, SaaS developer, AI engineer, AI SaaS developer, AI agent developer, AI automation engineer, LLM engineer, .net 8, Web API developer, Entity Framework Core, SQL Server, Microsoft Azure, Azure Functions, AI engineer, Azure App Service, microservices, Clean Architecture, CQRS, OpenAI integration, Azure OpenAI, ChatGPT integration, AI chatbot, conversational AI, RAG, LangChain, vector database, semantic search, AI voice agent, voice AI, agentic AI, multi-agent systems, AI-powered SaaS, multi-tenant SaaS, Stripe integration, subscription billing, Identity Server, OAuth2, JWT, AI engineer, REST API, TypeScript, Angular Material, Tailwind CSS, Docker, CI/CD, Azure DevOps, GitHub Actions, performance optimization, EF Core optimization, AI engineer,