I’m a Senior Backend Developer with 8+ years of hands-on experience building reliable, scalable backend systems using PHP (Laravel) and Node.js. Most of my work is focused on backend architecture, API development, and performance optimization for real business products — not demos or pet projects. I’ve worked with startups and established companies on SaaS platforms, CRM systems, fintech solutions, and e-commerce backends. What I do best: Backend development with Laravel and Node.js Designing and building REST APIs Working with high-load applications Improving performance, stability, and security Refactoring and maintaining existing codebases Tech stack: PHP 8+, Laravel, Lumen Node.js, Express, NestJS MySQL, PostgreSQL, MongoDB Redis (cache, queues) Docker, CI/CD AWS, DigitalOcean Git, GitHub / GitLab APIs & integrations: REST / JSON APIs Payment systems (Stripe, PayPal) Third-party services and webhooks How I work: I write clean, maintainable code and think about long-term scalability. I care about clear communication, realistic timelines, and delivering results that actually solve business problems. If something can be done better or simpler, I’ll say it. Projects I can help with: Backend from scratch API for web or mobile apps Refactoring legacy Laravel / Node.js code Performance optimization Ongoing backend support If you’re looking for a backend developer who can work independently and take responsibility for the server side of your product — feel free to message me.

Specialized in SaaS Development & Full-Stack Architecture for Startup Founders — from MVP to Scalable Product I’m a SaaS Architect and Full-Stack Developer with 8+ years of experience helping founders turn ideas into secure, scalable products. With 200+ projects delivered, I understand how to move fast without compromising long-term architecture. I work closely with startups to build MVPs that are investor-ready, technically sound, and designed to scale from day one. 🔧 What I help founders build: SaaS Platforms – multi-tenant, subscription-based systems Backend Systems (PHP-focused) – Laravel, Symfony, custom PHP Full-Stack Web Apps – Node.js, Python, React, Vue AI-Powered Features – ChatGPT integrations, workflow automation Cloud Infrastructure – AWS setup, CI/CD, production-ready deployments Subscription & Billing Systems – Stripe integrations, lifecycle handling ✅ Startup-focused results: Rebuilt a SaaS dashboard used by 50K+ users — increased activation by 25% Developed an AI-powered validation system serving thousands of professionals Launched a subscription-based platform with automated billing and scheduling 💡 If you’re validating an idea, preparing for launch, or scaling after traction — I can help you build clean architecture, avoid technical debt, and move from MVP to growth stage smoothly. 🧠 Core Stack: PHP, Laravel, Symfony, Node.js, Python, React, Vue, MySQL, PostgreSQL, Redis, REST APIs, AWS, Docker, Stripe I don’t just write code — I help founders build products that are technically solid and ready to scale. Let’s build your SaaS the right way from day one.

🏆 .NET Developer with 20+ years of experience building scalable, high-performance web applications and backend systems. I specialize in ASP.NET Core, C#, MVC, Web API, and SQL Server to deliver robust, secure, and user-friendly solutions. 💡 Key Competencies: 🔹 Backend Development: C# | ASP.NET Core ⚡ Building scalable and secure backend systems with ASP.NET Core and C# ⚡ Developing RESTful APIs for seamless frontend-backend communication ⚡ Implementing authentication and authorization using JWT and OAuth ⚡ Middleware development for request handling and validation 🔹 Frontend Development: 📌 Creating dynamic, responsive, and interactive user interfaces with ASP.NET MVC and Razor Pages 📌 Integration with RESTful APIs and third-party libraries 📌 Responsive web design with CSS, Bootstrap, and JavaScript 📌 Building web applications with Angular, PrimeNG, TypeScript 📌 Blazor for building interactive web applications with C# 🔹 Database Management: SQL Server and PostgreSql 🌟 Designing and optimizing databases for performance and scalability 🌟 CRUD operations and complex query implementation 🌟 Data modeling and schema design for efficient data storage 🌟 Integration with Entity Framework Core, NHibernate and Dapper for streamlined database interactions 🔹 Microservices Architecture: 🌠 Using Docker for containerization and deployment 🔹 Fullstack Development: ⭐️ End-to-end development of web applications, from concept to deployment ⭐️ Seamless integration of frontend and backend systems ⭐️ Deployment on cloud platforms like Azure and AWS ⭐️ Version control with SVN, TFS, Git and collaborative workflows 🔹 Additional Skills: ✨ Testing with xUnit and Moq ✨ Agile methodologies for project management ✨ CI/CD pipelines for automated deployment ✨ Performance optimization for faster load times 💡 Why Choose Me? 🔥 Proven Expertise: Delivered 20+ .NET projects with measurable results 🔥 Scalable Solutions: Build applications that grow with your business 🔥 Client-Centric Approach: Clear communication, timely delivery, and dedicated support 🔥 Future-Proof Development: Write clean, maintainable, and well-documented code 🔥 Continuous Learning: Always updating my skills to stay ahead in the ever-evolving tech landscape 💡 Technical Stack: 📌 Backend: ASP.NET Core, C#, RESTful APIs, SignalR, Entity Framework Core 📌 Frontend: Angular, React, ASP.NET MVC, Blazor, CSS3, Bootstrap, JavaScript 📌 Database: SQL Server, PostgreSql, Entity Framework Core, other ORMs 📌 Tools: Git, Docker, xUnit, Moq 📌 Deployment: Azure 💡 Recent Projects: 🌎 Developed web system using ASP.NET Core Web API, Angular, PrimeNG, DevExtrem 🌎 Build different integrations using Azure Functions, Azure Storage, CosmosDB 🌎 Improve security with Azure Key Vault 🌎 Bug fix and implement new features for existed systems 🌎 Support and bug fix for big legacy distributed system .NET Developer Upwork .NET Development Upwork ASP.NET Developer Upwork ASP.NET Core Developer Upwork C# Developer Upwork .NET Web Development Upwork .NET Application Development Upwork .NET Software Developer Upwork .NET API Development Upwork .NET Backend Developer Upwork .NET Full Stack Developer Upwork ASP.NET MVC Developer Upwork .NET Core Developer Upwork .NET REST API Developer Upwork .NET Web API Development Upwork .NET Enterprise Application Development Upwork .NET Database Development Upwork .NET SQL Server Developer Upwork .NET Azure Developer Upwork .NET Cloud Application Development Upwork .NET Integration Developer Upwork .NET Performance Optimization Upwork .NET Maintenance and Support Upwork .NET Migration & Upgrade Services Upwork Skill Keywords# ASP.NET Developer | Blazor | Angular | ASP.NET Core MVC Developer | .NET Backend Engineer | Senior Full-Stack C# Developer | Clean Architecture in .NET | Freelance Enterprise .NET Developer | Microsoft Azure .NET Specialist | Cloud-Native .NET Engineer | .NET Dev with CI/CD Pipelines | Dockerized .NET App Developer | Finance & Insurance .NET Systems | API Development & Documentation (Swagger, Postman) | Backend Developer (.NET Core) | SQL Server Optimization & Query Tuning | Entity Framework Core + Code-First Dev | T-SQL / Stored Procedure | RESTful API Developer | Agile & Scrum-Based Project Experience | DevOps on Azure + GitHub Actions | Secure App Developer (JWT, Role-based Auth) | Localization & Globalization in .NET Apps | PDF & Excel Report Generator in .NET | Upwork Verified .NET Expert | ASP.NET Identity & Claims-Based Authorization | Automated Unit Testing with xUnit & NUnit | Azure App Service + Azure Storage + Key Vault Setup | Legacy App Modernization - .NET Framework to .NET Core

Do you want to have a fast, secure and responsive website on Drupal 10/11 and do it quickly with premium quality? You will get even more if you rely on my 🚀 15+ years of experience as 🏆 Top 1% developer mentored by marketers, SEO, security, and accessibility specialists. Write to me right now and I’ll estimate your project today: click Message button on the top of my profile. 💬 You will realize soon that every task you have is not new for me because I’ll use solutions from my previous ✅ 100+ websites I’ve built from scratch and individually customize them for your purpose. I’d be surprised if you give me a task I haven’t done before. It can be custom theme creation, custom module creation, updating Drupal to the latest version, upgrading and migrating Drupal from 7, 8, 9 to 10/11, integration of any API service and PHP service, any back-end, front-end and full-stack development including 🛠️ building websites from scratch. Hiring me you also will get 💼 MBA person with 5 years of experience in business administration. You will not need to explain each task in detail, just give me the purpose of your business and I’ll give you the best solution I know. ———————————— If you still have doubts, then read feedbacks of my clients: ⭐⭐⭐⭐⭐ 5.0 — "Kirill grasped the key requirement of the project from the get-go. He is very independent, hard-working and intelligent. He has a clear understanding of when to lead and when to be led. I loved the way he worked with his teammates on getting the final product QAed and deliver a result which deserves nothing but 10 stars." ⭐⭐⭐⭐⭐ 5.0 — "Kirill is an absolute gold mine! In my 20 year career I have rarely met an engineer so intelligent, hard-working, communicative and gregarious. I truly enjoy working with him and recommend him to anyone looking for a true pro." ⭐⭐⭐⭐⭐ 5.0 — "Kirill quickly learnt an unfamiliar codebase, properly consumed the requirements and delivered on-time and on-budget. I have nothing but praise for his exceptional skill-set, confidence and quality of work. Highly recommended for any project looking for a true professional." ⭐⭐⭐⭐⭐ 5.0 — "This was the 2nd project we have done together. Kirill works very precise and fast. Everything is done right even down to the smallest detail." ⭐⭐⭐⭐⭐ 5.0 — "Great work ethic and best solution. He is a 10 X developer." ⭐⭐⭐⭐⭐ 5.0 — "Kirill is such a professional. He is always responsive - no matter what the time is! I am happy I've met him here and will continue to work with him for the long term future." ———————————— As you can see my goal is to make the customer happy. 😊 Don’t forget to write to me by clicking the Message button on the top of my profile and I’ll estimate your project today. 💬

⚡ 2000+ jobs completed on Upwork ⚡ ⚡ Top Rated Plus ⚡ ⚡ 100% JSS ⚡ 🚀 AI-Driven Python Developer | Machine Learning Engineer | Backend Architect | Full Stack Developer Hi! 👋 Looking for a Python Developer who can build not just scripts or APIs, but scalable AI-powered products, backend systems, machine learning pipelines, AI agents, and production-ready platforms? With 8+ years of experience in Python Development, Machine Learning, Backend Engineering, and AI-driven software architecture, I specialize in building scalable AI systems, intelligent backend platforms, automation workflows, SaaS products, and enterprise-grade applications powered by modern AI and cloud technologies. As a Head of Python / ML Department, I lead AI-native engineering workflows and high-performing development teams focused on Machine Learning, AI automation, backend scalability, and full stack product development. We actively use modern AI-enhanced development workflows and tools such as Cursor, Claude Code, GitHub Copilot, GPT-4o, Claude Sonnet, AI-assisted debugging systems, AI-powered automation, multi-agent workflows, AI orchestration systems, AI-enhanced CI/CD pipelines, and AI-native engineering practices to accelerate delivery, optimize architecture, improve code quality, and reduce development time. 📈 AI & Backend Experience ✔ AI-powered analytics platforms ✔ AI agent integrations & chatbot systems ✔ Predictive analytics & customer behavior analysis ✔ AI-assisted automation workflows ✔ AI-driven backend architecture ✔ Machine Learning pipelines processing large-scale datasets ✔ NLP & Computer Vision systems ✔ AI-enhanced SaaS platforms ✔ Enterprise-grade backend systems ✔ Production-ready Python backend infrastructure ✔ Real-time backend systems & scalable APIs ✔ AI orchestration & automation workflows ✔ Cloud-native AI systems & MLOps pipelines 🛠 Python / Backend / AI Expertise ✔ Python Development ✔ Python Backend Development ✔ Django Development ✔ Flask Development ✔ FastAPI Development ✔ AI-powered backend systems ✔ Full Stack Developer solutions ✔ Node.js & JavaScript backend collaboration ✔ PHP & React development collaboration ✔ REST APIs & GraphQL APIs ✔ PostgreSQL / MySQL / MongoDB ✔ Machine Learning & Deep Learning ✔ AI agents & AI chatbots ✔ AI-assisted backend workflows ✔ NLP, Computer Vision & Predictive Models ✔ Cloud infrastructure & scalable architecture 🤖 AI Engineering Stack ✔ OpenAI GPT-4 / GPT-4o ✔ Claude Sonnet / Claude Opus ✔ Cursor ✔ Claude Code ✔ GitHub Copilot ✔ AI-native engineering workflows ✔ AI-assisted development ✔ Agentic coding workflows ✔ Multi-agent AI systems ✔ AI-powered debugging & refactoring ✔ AI-enhanced CI/CD pipelines ✔ AI workflow orchestration ✔ AI automation systems ☁️ Cloud & Infrastructure ✔ AWS / Azure / Google Cloud ✔ Docker & Kubernetes ✔ CI/CD & DevOps automation ✔ Redis / RabbitMQ / Kafka ✔ Elasticsearch ✔ Firebase / Supabase ✔ Scalable cloud-native systems ✔ Production-grade backend deployment 🚀 What We Deliver ✔ Scalable Python backend systems ✔ AI-powered SaaS products ✔ Machine Learning & AI solutions ✔ AI agent integrations ✔ AI-enhanced applications ✔ Production-ready APIs & backend infrastructure ✔ Enterprise-grade backend architecture ✔ Full stack development solutions ✔ Cloud-native scalable platforms ✔ AI automation & intelligent workflows 🤝 Team & Collaboration By the way, our team also includes experienced: ✔ Node.js Developers ✔ JavaScript Developers ✔ React Developers ✔ Vue Developers ✔ PHP Developers ✔ Java Developers ✔ Full Stack Developers This allows us to provide full-cycle product development for startups, SaaS products, enterprise systems, AI platforms, and scalable cloud-native applications. ⭐ Why Work With Me ✔ 8+ years of Python Development & Machine Learning experience ✔ Strong AI integration & AI workflow orchestration expertise ✔ AI-driven engineering & automation-enhanced development ✔ Scalable architecture & production-ready systems ✔ Clean, maintainable, enterprise-level code quality ✔ Fast communication & long-term collaboration mindset ✔ Proven experience building AI-powered products & backend systems 🔑 Keywords to find me: Python Developer | Python Backend Developer | Senior Python Developer | Django Developer | Django Backend Developer | Flask Developer | FastAPI Developer | Machine Learning Engineer | AI Developer | Artificial Intelligence Engineer | Backend Developer | Full Stack Developer | Python Full Stack Developer | Node.js Developer | Node.js Backend Developer | JavaScript Developer | React Developer | PHP Developer | PHP Backend Developer | Full Stack Developer Python | Full Stack Developer Node.js | AI-powered backend | AI agent development | AI chatbot development | AI automation | AI orchestration | AI-native engineering | AI-assisted development | GPT-4 | OpenAI | Claude AI | Cursor AI | GitHub Copilot | Machine Learning | Deep Learning | NLP | Natural Language Processing | Computer Vision | Predict

I'm a Senior Technical Specialist, CTO and Tech Lead, specializing in AI (first touched in 2006, exit for $130 M, top agency on Upwork in 2016) with active involvement in AI Agent development since 2023, and hyperactive in blockchain since 2017. 300+ projects shipped across AI, blockchain, and Web2 I help founders and operating teams turn complex AI and blockchain ideas into working systems. The work usually looks like one of three things: ▸ AI AGENTS & AUTOMATION — through ADAIA (Dubai, since 2023) AI venture studio building agentic systems for industries left behind by AI: architecture, engineering, construction, and industrial B2B. 15+ AI ventures launched in three years. Custom AI agents that run inside the tools your team already uses. Built with Claude, GPT, LangGraph, LangChain, n8n, Make, and Python. WHAT CLIENTS TYPICALLY SEE • +20% increase in outreach • +20% sales-conversion lift • +10% upsell optimization • −20% production / service costs • −30% admin overhead • VitruAI (flagship product) — agentic-AEC platform deployed inside Revit, Rhino, Grasshopper, ArchiCAD, AutoCAD, Navisworks, BIM 360, and Procore via MCP, signed add-ins, and SignalR bridges. Dubai Villa Code: 180 rules encoded, compliance review cut from 14 hours to 14 minutes, every finding linked to rule + element + measurement. • Orion AI Systems (sister product) — industrial B2B revenue agents for sales, marketing, and customer-success workflows. Managed service, per-tenant inference isolation, governed and auditable. ▸ BLOCKCHAIN STRATEGY & BUILD — through Applicature (since 2017) and Vidma Security (since 2021) Applicature is a blockchain consulting and venture building house. Concept-to-launch for DeFi, RWA, GameFi, DePIN, and DAO projects. Tokenomics, smart contracts (Solidity, Rust/Anchor), TGE management, and regulatory routing through MiCA, SEC, VARA, and MAS. Vidma Security runs the audit practice — combined automated scanning (Slither, Oyente, Manticore) with line-by-line manual review. TRACK RECORD: 270+ projects delivered · 30+ token launches · 150+ smart contracts deployed · $500M+ raised for clients · $100M+ TVL across DeFi protocols · ZERO post-audit exploits across five jurisdictions. Enterprise Ethereum Alliance member since 2017. Oracle Silver Partner. Named Top 10 ICO Development Agency in 2018. ▸ FRACTIONAL CTO & TECHNICAL CO-FOUNDER Senior leadership embedded part-time. Architecture, hiring, investor calls, vendor evaluation, and product roadmap. 20+ engagements to date. Tech stack: AI / Agents — Claude, GPT, LangGraph, LangChain, n8n, Make, Zapier, Python, vector DBs, MCP, RAG pipelines. Blockchain — Solidity, Rust, Ethereum, Polygon, Arbitrum, Optimism, BSC, Solana, ICP. Hardhat, Foundry, OpenZeppelin, Slither. ERC-20, ERC-721, ERC-1400, ERC-3643. Compliance — MiCA, SEC, VARA, MAS. KYC/AML platform integration. How we work: • Discovery call — 30 minutes, focused on whether your problem is actually a fit. • Scoped engagement — fixed-price or hourly, with weekly working sessions. • Retainer or fractional CTO for ongoing leadership. Send a short brief and I'll come back within one business day what the next step looks like.

👋 Hi! I'm a full-stack engineer and tech lead with over 15 years of experience building scalable, reliable, and business-focused software systems. My expertise spans Node.js, PHP, React, and DevOps, with a strong focus on architecture, system design, and full-cycle product development. I’ve worked in both startup and enterprise environments, delivering results across fintech, e-commerce, SaaS, and infrastructure-heavy domains. 🧠 Core Competencies Languages & Frameworks: JavaScript / TypeScript / PHP / Go / Python Node.js, NestJS, React, Vue, Angular, Symfony, Laravel, Yii Flutter, Unity3D Infrastructure & DevOps: Docker, Kubernetes, CI/CD, Vault AWS (EKS, EC2, S3), Microservices, DDD Redis, RabbitMQ, Kafka, ClickHouse REST, GraphQL, RPC Practices: - Domain-Driven Design - Scalable Microservices - Event-driven Architecture - Secure Authentication and Payments - Cloud-native & Distributed Systems - Team Leadership & Mentoring 🚀 Project Experience 💰 Fintech & Payment Platforms Lead backend and architecture efforts for complex financial ecosystems supporting multi-provider payment flows, including fallback and cascading logic. Ensured compliance, fault tolerance, and high availability. 🏦 Lending & Investment Solutions Developed platforms that automate investment processing, schedule repayments, and manage a secondary credit market. Delivered end-to-end integrations for identity verification, financial reporting, and contract management. 🛒 E-commerce & Retail Tools Created tools that improve customer experience in online retail, including an AI-powered virtual fitting room with real-time 3D simulation. Managed web and mobile versions in cross-platform environments. 🗳️ Community & Communication Platforms Designed systems for secure collaboration within communities and organizations, enabling features such as voting, project proposals, group messaging, and utility service integrations. Built real-time and mobile-friendly solutions. 💬 Customer Engagement & Messaging Worked on a marketing automation system enabling multi-channel communication, behavioral segmentation, and real-time analytics. Scaled data pipelines and ensured delivery speed and accuracy. 🔐 Authentication & CRM Systems Implemented identity federation and OAuth flows with major providers. Built internal CRM platforms for call centers and real-time chat systems supporting large numbers of concurrent users. 📱 Mobile App Distribution Platforms Engineered a backend for a digital marketplace focused on mobile app distribution, monetization, and analytics. Supported custom billing, tracking, and content delivery pipelines. 🎯 What I Bring ✅ Deep technical expertise and passion for software design ✅ Track record of delivering scalable, resilient, and maintainable systems ✅ Leadership in both greenfield and legacy transformation projects ✅ Strong communication and mentorship skills ✅ Product-oriented mindset with focus on value delivery 📬 Let’s Connect! I'm open to new opportunities in backend, architecture, or cross-functional tech leadership. Whether you're building a fintech platform, a real-time app, or a complex SaaS product — I’m ready to help scale your vision.

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.

Results-driven Python Developer with hands-on experience in building and maintaining custom connectors, web scrapers, web applications on Flask, Fast API. Proficient in integrating third-party services, automating workflows using Airflow, and optimizing data pipelines. Strong focus on data processing and web development, with a keen interest in solving architectural challenges and continuously expanding technical expertise.

🚀 17+ years of professional experience 🚀 50+ successfully delivered enterprise & SaaS projects 🚀 9,500+ hours on Upwork of high-quality development delivered I'm a React Developer and Front End Developer with 17+ years of experience shipping enterprise and SaaS products across Logistics, Aviation, Real Estate, FinTech, and HealthTech. My work as a React Developer and Front End Developer covers the full frontend lifecycle - from Figma handoff and component architecture to deployment, bundle optimization, and Lighthouse audits. As a Front End Developer, I take full ownership of what I build, not just the code I commit. As a Front End Developer, I work with React JS, TypeScript, JavaScript, HTML5, and CSS3 daily. I implement reusable component libraries and scalable state management with Redux and Zustand. As a React Developer, I ensure cross-browser compatibility across all devices and browsers. I work with Next.js for SSR/SSG architectures deployed on AWS and Vercel, and integrate data visualization using Recharts and D3.js - standard tooling for a senior React Developer and Front End Developer. Performance and accessibility are non-negotiable for me as a Front End Developer and React Developer. I optimize for high Lighthouse scores, WCAG compliance, and fast load times for global audiences. Whether it's a conversion-focused landing page or a complex SaaS dashboard with real-time data, I build interfaces that are fast, accessible, and maintainable as a React Developer. This is the standard I hold as a Front End Developer on every project. Beyond pure frontend, I work as a Full Stack Developer when projects call for it. I've automated manual workflows by 50–70% through custom APIs and internal dashboards. As a Full Stack Developer, I integrate REST APIs and GraphQL services, and I've shipped B2C marketplaces with Stripe and PayPal for clients in Finance, Healthcare, and Insurance. Every engagement as a React Developer and Front End Developer is held to enterprise-grade delivery standards. Cross-platform mobile is part of my toolkit as a React Developer and Full Stack Developer. I build iOS and Android apps using React Native, delivering near-native performance for startups in the AI and IoT sectors. For backend logic I use Node.js, PHP, and Python — which I handle as a Full Stack Developer to complement my React Developer and Front End Developer frontend work. I align with distributed teams on coding standards, component architecture, ESLint/Prettier configs, and PR review processes. Large-scale dashboards, multi-vendor marketplaces, billing platforms, and subscription management systems are where I do some of my strongest work as a Front End Developer and React Developer. I build SEO-optimized Next.js applications with high Lighthouse scores. As a React Developer and Front End Developer, I help teams avoid future rework by delivering clean, scalable architectures that the next engineer can confidently extend. A well-structured codebase saves teams hundreds of hours. My domain experience as a Front End Developer and React Developer spans AI platforms, EdTech, Machine Learning tooling, fintech, and cybersecurity. As a React Developer and Front End Developer, I work end-to-end — from wireframe to production — and own the outcome. As a Front End Developer, I write code with consistent naming, clear component boundaries, and documented APIs so the next engineer can contribute without lengthy onboarding. What I bring as a React Developer and Front End Developer: - Component architecture: reusable libraries, design systems, Nx/Turborepo monorepo structure as a Front End Developer - State management: Redux, Zustand, React Query - chosen per project needs as a React Developer - API integration: REST, GraphQL, Stripe, PayPal, third-party SaaS services as a Full Stack Developer - Accessibility and performance: WCAG-compliant, Lighthouse-optimized as a Front End Developer - Cross-platform: React Native for iOS and Android as a React Developer and Front End Developer - SEO: server-side rendering, metadata, structured data as a React Developer using Next.js Looking for a React Developer or Front End Developer who delivers clean production-ready code? 9,500+ Upwork hours. 50+ shipped projects. Predictable delivery and long-term ownership. Clients hire me as a React Developer and Front End Developer for projects where the frontend is not just a UI layer but a core part of the product. As a Front End Developer, I've built analytics dashboards with real-time data, complex data-entry workflows, WebSocket-driven notification systems, and multi-step onboarding flows. As a React Developer, I think in terms of prop contracts, render performance, and state ownership - decisions that determine how painful the next feature will be to ship. If you're looking for a Front End Developer and React Developer who treats your codebase as their own, I'm the Front End Developer for the job. Let's build something great together.