Senior .NET developer with 25+ years of hands-on experience working on real production systems. I help companies stabilize, modernize, and extend desktop and legacy .NET applications, taking ownership of existing codebases and delivering clean, maintainable solutions that work reliably long-term. Most of my work involves improving existing Windows desktop applications rather than building throwaway prototypes. I regularly take over mature or poorly documented systems, identify structural and stability issues, and extend functionality without disrupting production workflows. Clients usually come to me when a system is business-critical and needs careful, senior-level handling. My core expertise is in Windows desktop development using C#, WPF, WinForms, and the .NET Framework. I also have extensive experience supporting and modernizing legacy systems built with VB.NET, VBA, C++, and Delphi, including Office automation, custom installers, file system integration, and data-processing tools. For modernization and supporting services, I work with .NET Core, ASP.NET, Razor Pages, and REST APIs, which allows me to evolve legacy desktop systems, build internal web tools, or deliver complete end-to-end solutions when needed. I follow proven architectural practices such as MVVM, layered design, version control with Git, and predictable deployment processes. I’ve completed 120+ projects and 37,000+ hours on Upwork, working primarily on long-term and technically demanding systems where reliability, clarity, and ownership matter more than quick fixes. If you’re looking for a dependable senior .NET developer who can take responsibility for an existing system or build a stable desktop application from scratch, I’d be happy to discuss your project.

We build immersive MVPs and product experiences that help startups validate faster and help brands sell better. 🏆 100% Job Success | Top Rated Plus | $1M+ Agency Revenue | $600K+ on Upwork | 100+ Projects | Top-10 Upwork Rankings ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ We help product companies turn complex products into interactive, AI-ready digital experiences: 3D configurators, AR previews, AI assistants, and websites optimized for both humans and search/AI systems. 💥 Results That Matter → +226% sales growth after replacing a static catalog with a real-time 3D configurator → −40% product return rate for e-commerce clients using AR try-before-you-buy features → 3× higher engagement on WebGL Three.js product pages vs. standard pages → 5+ startups secured seed & Series A rounds using AR/VR MVP demos we built → 30,000+ hours of immersive development | 150+ high-impact projects delivered annually ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ As founder of AESTAR — a specialized immersive tech agency with 12 years of experience — I lead a senior team of 3D developers, AR/VR engineers, and AI specialists. We don't just execute tasks; we work as full-cycle strategic partners: diagnosing your business problem, architecting the right immersive solution, and shipping it across Web, Meta Quest, and HoloLens platforms. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🚀 From Idea to Investment-Ready: Startup Roadmap We've taken 5+ startups from zero to funded. First, we analyze your business model and identify where immersive 3D technology creates the strongest competitive advantage. Then we validate with a rapid PoC, build an investor-ready MVP using Unity, WebGL Three.js, and AI integration capabilities, and prepare your 3D visualization and demo for pitch day. Startups that present interactive AR/VR prototypes — not static slides — close rounds faster. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🔶 MVP Development & Rapid Market Entry From concept to investor-ready product in weeks. We combine Unity, React website stack, and WebGL Three.js to ship fast without sacrificing quality or scalability — giving startups a real edge at the demo table. Every MVP is built on production-ready architecture, so scaling after launch requires zero rebuild. 🔶 3D Configurators & Interactive Product Platforms Static pages kill conversions. Our Unity and WebGL Three.js-powered 3D configurators transform passive browsing into active buying — reducing return rates and accelerating deal closure. From 3D modeling, 3D rendering, and product visualization to final React website integration, we own the entire 3D production pipeline. 🔶 AR & VR Development From Meta Quest VR training environments to mobile AR try-on tools, we engineer AR VR solutions using Unity and Vuforia that feel natural, perform flawlessly, and scale beyond the demo stage. Our AR VR development covers WebXR, native mobile, and headset platforms including HoloLens. 🔶 AI Integration & Smart Immersive Experiences We integrate AI-driven personalization, recommendation engines, and computer vision into 3D visualization, AR environments, and immersive 3D experiences. Our AI integration approach gives e-commerce brands and startups a compounding competitive advantage that grows over time. 🔶 Scalable Web Architecture Every solution we deliver runs on a solid foundation: Next.js, React website architecture, JavaScript, and optimized WebGL Three.js rendering pipelines. Performance, mobile readiness, and stability under high load are non-negotiable. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🤝 What Clients Say About Working With AESTAR → "Deep knowledge of VR/AR — they consistently bring fresh ideas to enrich the experience." → "Delivered a complex VR project in 2 weeks, one day ahead of deadline — better than expected." → "A dedicated project manager, weekly Zoom syncs, Slack updates — consistently on time." → "None of the other teams had the same eagerness to find creative solutions." Every project includes a dedicated PM, transparent roadmap, and weekly status calls — so you always know exactly where your product stands. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ⭐️⭐️⭐️⭐️⭐️ "AESTAR delivered a high-end immersive experience that exceeded expectations — seamless functionality, stunning 3D visuals, and exceptional attention to performance. Communication was fast, clear, and professional throughout." ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Technology moves fast. We ensure you don't just keep up — but stay ahead of the curve. 🤙 Click "Message" or "Invite" to discuss your vision and build your market-leading immersive solution today. vr developer | unity | webgl three.js | react website | 3d configurator | ar vr development | next.js | javascript | 3d modeling | meta quest | vuforia | MVP | three.js gsap | html css javascript | PropTech | fintech | health startup | dental visualization | SaaS | education | POC

Senior ASP.NET / C# Full-Stack Developer with 11 years of professional experience. Technical Lead and Team Lead on enterprise projects across 7 business domains SKILLS: ASP.NET & C# -- 9+ years with ASP.NET MVC, ASP.NET Core, Web API, .NET Framework, .NET Core, Entity Framework Full-Stack -- C#/.NET backend + Angular (2 yr), React/Redux (2 yr), jQuery (4 yr). TypeScript, JavaScript, HTML, CSS, SASS/SCSS, NgRx, Angular Material Databases -- SQL Server, MySQL, PostgreSQL, CosmosDB, Redis, MongoDB. Performance tuning, stored procedures, index optimization, database structure design Cloud & DevOps -- Azure (3 yr), AWS (1 yr), GCP (1 yr), Docker, Kubernetes, CI/CD, Azure DevOps, Bamboo, PowerShell Architecture -- Monolithic (6 yr) and Microservices (3 yr). Distributed transactions with MassTransit, RabbitMQ, database-per-service, shared database Leadership -- Scrum ceremonies, code reviews, sprint planning, backlog management, team performance evaluation Real-Time -- SignalR, WebSocket, ServiceBus for live notifications and messaging Security & Quality -- OAuth 2.0, JWT, Fortify scanning, penetration testing remediation, performance/load/stress testing Monitoring -- DataDog dashboards, AppDynamics, production metrics and performance reports PROJECTS: 1. Business Management Platform (2025 - present) Multi-location businesses and franchises: workforce scheduling, hiring, onboarding, task automation, compliance, maintenance scheduling, inventory control, analytics. Built real-time messaging with auto-scaling, hysteresis in caching, message reactions, SignalR broadcasting. Employee time clock. Advanced schedule configuration. Team: 5 devs, 1 PM. Tech: .NET Framework, .NET Core, ASP.NET MVC, SQL Server, CosmosDB, Azure, jQuery, Redis, SignalR 2. Commodity Trading Portal (2023 - 2024) -- Technical Lead SPA for South American commodity trading. Designed architecture, verified with solution architects. Wrote technical design documents and database diagrams. Managed development plan months ahead. Reviewed all PRs. Aligned cross-team dependencies. Set up MassTransit for distributed transactions across multiple databases. Built microservice for business contracts with South America-specific requirements. Team: 1 SA, 4 Full-Stack, 1 FE, 3 BAs. Tech: Angular, NgRx, TypeScript, OAuth 2.0, JWT, Docker, Azure DevOps, MassTransit 3. Healthcare Portal (2023) -- Team Lead Medical professionals: profiles, job applications, licence confirmation, patient history tracking. Improved legacy app performance by 30-80%. Built DataDog dashboards. SQL performance tuning. Fortify security scanning. Automated deployments. Identified root causes of inconsistently reproducible issues. Team: 2 TLs, 3 devs, 2 QA, 1 DBA, 1 PM, 1 SA. Tech: SQL Server, DataDog, AppDynamics, PowerShell, Fortify, Bamboo 4. Enterprise Feedback System (2022 - 2023) Built from scratch in 1 year, on time. Employee feedback: drafts, tags, aspects, receivers. Microservice architecture with shared database. Complex filtering and data warehouse reports. Performance/load/stress tests. Database index tuning. Migration tools. CRUD and filtering APIs. Penetration testing fixes. Private NuGet feed. Team: 1 TL, 3 BE, 2 FE, 1 PO, 1 BA, 3 QA, 1 DevOps, 1 SA 5. Warehouse Logistics (2019 - 2022) -- Team Lead Role-based portals: truck drivers tracking load/offload, dispatchers assigning docks, analytics. Business trips to Canada for on-site client work and production support. Managed front-end team. On-call support (red phone). Linux server management. High-performance SQL. Background workers. RabbitMQ queues. ML dataset preparation. Installed hardware on warehouse trucks for movement tracking. Team: multiple devs, 3 QA, 1 SA, 1 PM. Tech: ASP.NET MVC, Web API, React, Redux, jQuery, RabbitMQ, SQL Server 6. Social Network for Car Drivers (2017 - 2019) Posts, comments, likes, private messages, groups, organisations. User wall (Facebook-like), image/video upload and processing, real-time notifications with SignalR, ServiceBus jobs. Team: 6 devs, 1 PM, 2 QA. Tech: ASP.NET MVC, jQuery, SignalR, ServiceBus DOMAINS: Social networking, warehouse logistics/supply chain, healthcare, commodity trading, employee feedback/HR, business management/franchises, government compliance, asset/operational management CERTIFICATIONS: Azure Fundamentals, MCSD App Builder, MCSA Web Applications, Exam 487 (Azure/Web Services), Exam 486 (ASP.NET MVC), Exam 480 (HTML5/JS/CSS3) EDUCATION: Master's in Business Administration -- Ivano-Frankivsk National Technical University of Oil and Gas WORKING STYLE: Experienced with Scrum and Kanban. Strong technical documentation skills. Skilled in communicating directly with product owners and customers. Work well both independently and in teams. Full SDLC participation. Prioritize writing efficient, maintainable code with focus on privacy and security.

🚀 $50M+ in Client Revenue | 100% Job Success | 8+ Years on Upwork I specialize in Mobile app development for products that are intended to run in production, support real users, and continue evolving over time. My work in Mobile app development is focused on stability, clear architecture, and avoiding short-term decisions that create long-term cost. I typically work on apps that need to be maintained, extended, and operated by teams long after the initial release. As a Hybrid app developer, I take responsibility for how mobile applications behave across platforms and over time. Being a Hybrid app developer means more than sharing code between iOS and Android. It means making architectural choices that reduce future risk, keep development predictable, and allow teams to continue building without constant rewrites. That mindset shapes how I approach Mobile app development from the start. 📱The majority of my Mobile app development work is built with React Native. I use React Native in production environments where reliability and clarity matter. React Native can scale well when it’s structured properly and treated as a long-term system rather than a shortcut. As a Hybrid app developer, I focus on clear data flow, predictable behavior, and codebases that teams can safely evolve. React Native is central to how I deliver maintainable Mobile app development. Alongside React Native, I have hands-on experience with Flutter in production mobile applications. This broader exposure helps me make informed decisions as a Hybrid app developer, rather than forcing a single framework into every situation. I also regularly work with existing react native projects that require refactoring, stabilization, or preparation for long-term ownership. 📊 Across my Mobile app development work, applications I’ve contributed to have surpassed 1M combined downloads and support tens of thousands of monthly active users. Several of these products are still actively developed years after launch. As a Hybrid app developer, I view longevity and operational stability as the real indicators of success in Mobile app development, not just release milestones. I often work as a full stack developer alongside Mobile app development, designing and integrating backend services, APIs, and infrastructure. My background as a web developer helps ensure mobile apps fit cleanly into larger systems that include dashboards, internal tools, and third-party integrations. This end-to-end perspective reduces friction and keeps Mobile app development aligned with the rest of the product. 🧠 In practice, my work as a Hybrid app developer commonly involves: - structuring or refactoring React Native applications - improving runtime stability and performance - reducing complexity in growing Mobile app development codebases - preparing MVPs to evolve into long-term products I’ve seen enough Mobile app development projects to know where they usually break down. As a Hybrid app developer, I try to prevent that by keeping React Native apps straightforward, well-organized, and easy to change. I avoid clever shortcuts and patterns that look good early but create problems later. The aim is steady, predictable progress rather than fragile speed. 🛠️ A significant part of my work involves taking over mobile apps that have become difficult to maintain. Many React Native projects move quickly at the beginning and accumulate hidden complexity. I regularly step into these situations to simplify structure, clarify boundaries, and make ongoing Mobile app development manageable again. In many cases, this has more impact than adding new features. 🔄 Mobile app development is iterative by nature. Requirements change, usage patterns evolve, and teams grow. As a Hybrid app developer, I design React Native applications so they can adapt without destabilizing the system. This flexibility is especially important for early-stage products transitioning into long-term platforms. I care about how teams interact with the code after delivery. As a Hybrid app developer, I aim for React Native projects that internal developers, designers, and product owners can open and work with confidently. Clear structure and readable logic make everyday Mobile app development far less error-prone. 🌱 Many of my Mobile app development engagements start at the MVP stage and continue through multiple growth phases. I deliberately avoid disposable prototypes. As a Hybrid app developer, I use React Native to move efficiently while establishing foundations that support future features, scaling, and team handover. 🤝 Clients typically engage me as a Hybrid app developer when they need clear ownership beyond initial delivery. Using React Native in real production contexts, I focus on building Mobile app development systems that are stable under real usage, maintainable by teams, and structured to evolve without repeated rework.

I'm Andrey — a Senior С# and .net Engineer with over 8 years of professional experience and 60+ successfully delivered projects. I specialize in building enterprise-grade systems where Azure cloud infrastructure and Angular frontends meet robust ASP.NET backends. My expertise in Javascript and modern web standards allows me to design architectures that withstand 3M+ monthly users while passing rigorous security audits. 🏆 CORE STRENGTHS & IMPACT 🔹 Enterprise Backend: Architecting stable ASP.NET Core and .net services with 99.9% uptime. By leveraging С# for mission-critical logic, I ensure that every Azure deployment is optimized for high-load performance and military-grade security. 🔹 Modern Frontend: Developing fast Angular interfaces with 95+ Google PageSpeed scores. I bridge the gap between complex Javascript logic and seamless UI, ensuring that my ASP.NET integrations remain responsive and user-friendly. 🔹 Cloud & Data: Optimizing Azure SQL and MongoDB databases, reducing query latency by 45%. My deep knowledge of the .net ecosystem and С# allows me to handle complex migrations from legacy platforms to modern Angular applications. 🔹 Full Stack Integration: Seamless API integration for distributed services. I use Javascript to build interactive dashboards and ASP.NET to process heavy data, ensuring that your С# codebase remains maintainable and scalable. ⚡ COLLABORATIVE LEADERSHIP I thrive in environments where I can lead engineering teams as a Senior .net Architect. I frequently coordinate the transition of corporate ERP portals to Azure, ensuring that the Angular frontend and ASP.NET backend are perfectly synchronized through clean Javascript communication layers. My mastery of С# and the broader .net framework allows me to achieve a 40% reduction in operational costs for my clients. Whether it’s a high-performance Angular portal or a secure Azure environment, I focus on delivering a comprehensive ASP.NET solution. I ensure that every line of Javascript and С# code I write is extensible and ready for future growth. 🛠 TECH STACK: 💻 Backend: С#, .net, ASP.NET Core, Web API, SignalR, Python. 🌐 Frontend: Angular, Javascript, TypeScript, HTML5, CSS3, React. ☁️ Cloud/DB: Azure, ASP.NET Identity, SQL Server, PostgreSQL, Docker. 🛠 Tools: Azure DevOps, Angular CLI, Git, CI/CD pipelines. ⭐ If you need a Senior .net Developer who confidently masters С#, ASP.NET, and Angular to deliver real business value via Azure and Javascript — let’s connect!

I'm a solo Dev. I have more than 9 years of experience in Mobile development and web development. I have been working with the cross-platform framework React Native for 6 years and am still working. This is my main stack right now. I use TypeScript and JavaScript to make React Native apps. I tried the Flutter framework back in 2020, and I like it. I now use Flutter to develop cross-platform applications, and I like it more and more. I feel that I will soon switch completely to Flutter only! Flutter is less of a headache :) Back in 2012, I started my career as a front-end web developer with JavaScript. Since 2015, I started developing for Android applications, and after a year of work, I bought myself the first MacBook to make native applications for iOS. Do you remember Objective-C? I do)) I'm interested in long-term customer relationships, so I am ready to participate in your project from idea to production and provide high-level support after delivering the main work. - I have been using FlutterFlow as well since 2023, and I like it. So I can help you with FlutterFlow if you need it - I like web3 and already have experiance with cryptocurrency token launch and blockchain development Below is my humble list of tools I have experience with or enjoy working with: - React Native - TypeScript - Flutter - Dart - Swift - Kotlin - FlutterFlow - I can make a Native Swift/Kotlin component for React Native or Flutter - GitHub Actions I have used for CI/CD This is an easy way to automate tests and app delivery - Fastlane for CI/CD is the easiest way to automate tests and app delivery - Node.js - React.js - Redux - GraphQL - FastLane/circleci - RevenueCat - Firebase Cloud Firestore - Firebase Realtime Database - Firebase Remote Config - Firebase Cloud Functions - Firebase Authentication - FirebaseCloud Messaging - Firebase Hosting - Firebase Cloud Storage - Firebase Machine Learning - Firebase Dynamic Links I usually write autotests for code. I use these tools: - Jest - Mocha - Jasmine +++++Web3 development:++++++ - blockchain development - Crypto Wallet integrations - MetaMask integration - Alphawallet integration - Experience with coding competitions, e.g. ACM ICPC or Topcoder - cryptocurrency token launch - Casino Game development (including spinner, coinflip, lottery, splash, etc.) - I have already had experience in ChatGPT integration and other AI integrations. Other: - branch.io - ChatGpt integration - OpenAI - Sentry - Tokenscript - Heroku - AWS - DigitalOcean - DApps - retool - internal software development - DeFi projects - LayerZero Im not a Full-stack dev, but I have some experience with Python, Node.js and the Django framework!!!

I work as a Full Stack Developer, Web3 Developer and Blockchain Developer building production-ready applications that connect business logic with blockchain infrastructure. As a Web3 Developer, I focus on wallet integrations, smart contract interactions, and scalable dApp architecture. As a Blockchain Developer, I design and implement secure, efficient systems on top of modern blockchain networks. As a Full Stack Developer, I ensure everything works end-to-end, from frontend to backend, clean, scalable, and maintainable. As a Web3 Developer, Blockchain Developer, and Full Stack Developer, I’ve worked on real-world products involving NFT platforms, DeFi systems, and exchange-related applications. My main specialization as a Web3 Developer and blockchain developer is building integrations between applications and blockchain networks, including wallet connections, contract execution, and real-time data handling. I work deeply with blockchain infrastructure, ensuring applications behave reliably under real user conditions. The projects I’ve worked on include: - NFT platforms as an experienced nft developer: landing-based apps, SPA and multi-page applications, NFT marketplaces, hybrid exchange systems, and Uniswap forks - Smart contract integrations as a Blockchain Developer: contract interaction using web3 and ethers libraries, handling transactions, events, and contract state as a smart contract engineer - Wallet integrations as a Web3 Developer: Metamask connections, custom Web3 context implementations, and secure interaction flows - Backend systems as a Full Stack Developer: building services with Node.js and TypeScript, working with MongoDB (Mongoose), PostgreSQL (Supabase), and Prisma for NFT data and application logic - Blockchain data querying as a Blockchain Developer: using Apollo Client with Uniswap subgraphs to fetch and process on-chain data efficiently - Gas optimization as a Web3 Developer: creating services that fetch gas price predictions and apply them to outgoing transactions - Exchange integrations as a Full Stack Developer: working with Binance API, order creation, and financial workflows As a Web3 Developer and Blockchain Developer, I have strong experience working with solidity, including creating ERC20 mintable tokens and handling contract deployment pipelines with Hardhat. As a Blockchain Developer, I have also handled migration of NFT systems from Ethereum to non-Ethereum environments, adapting logic, contracts, and integrations accordingly. As a Web3 Developer, I ensure compatibility across different chains and environments. On the frontend, as a react developer and web developer, I build modern, responsive interfaces using React, Next.js, and TypeScript. I’ve worked with Material UI, styled-components, Bootstrap, SCSS, and CSS modules, ensuring clean UI systems and maintainable code. On the backend, as a Full Stack Developer, I design APIs, manage data flows, and ensure consistency across distributed systems. I’ve also worked with state management (Redux, Redux Toolkit, redux-localstorage-simple), data layers (Prisma, MongoDB, PostgreSQL), and tooling (ESLint, Prettier), ensuring code quality and long-term maintainability across projects. As a Web3 Developer, Blockchain Developer, and Full Stack Developer, I focus on performance, reliability, and scalability. Many blockchain products fail not because of the idea, but because of weak implementation. As a Web3 Developer, I make sure integrations with wallets and smart contract systems are stable and predictable under real usage. As a Blockchain Developer, I focus on transaction correctness, contract behavior, and data consistency. As a Full Stack Developer, I ensure the entire system behaves correctly across frontend, backend, and infrastructure. In addition, as a Web3 Developer, I work on improving UX around blockchain interactions, reducing friction for users interacting with nft platforms and contract-based systems. As a Blockchain Developer, I focus on writing efficient and maintainable solidity code. As a Full Stack Developer, I connect all layers into usable, scalable products. Beyond blockchain, my broader experience as a web developer, wordpress developer, and mobile app developer allows me to approach projects from a full product perspective, ensuring usability, performance, and scalability in real-world conditions. I continuously improve as a Web3 Developer, Blockchain Developer, and Full Stack Developer, staying up to date with modern tools, frameworks, and best practices across blockchain and web development. If you’re looking for a Web3 Developer, Blockchain Developer, or Full Stack Developer to build NFT platforms, smart contract systems, or scalable applications connected to blockchain, I can help deliver a reliable, production-ready solution.

Your cloud bill is not a fixed cost. It's an engineering problem - and I solve it. Most companies overpay AWS or GCP by 30-70%. The money is hiding in untagged resources, oversized nodes, idle NAT gateways, and architectures that were designed to work - not to scale economically. I find it, I fix it, and I deliver measurable ROI within the first 30 days. With $900K+ earned on Upwork, 100% Job Success Score, and 19+ years as a CTO and Cloud Architect, I bridge Engineering and Finance - translating infrastructure complexity into business impact your CFO can read. Typical Problems I Solve → AWS or GCP costs are too high and growing month over month → No visibility into what's driving cloud spend → Need a cloud infrastructure audit before scaling → AI workloads are expensive and unpredictable to run → Compliance requirements (SOC 2, GDPR, HIPAA) creating engineering debt → Architecture needs redesign for cost-efficiency before next funding round Proven Client Results ▪️ Shoebacca (Large US E-commerce) → Challenge: AWS costs exceeded budget by 40%, with no tagging, no FinOps governance, and no cost visibility. → Solution: EKS rightsizing, NAT/ALB/EBS audit, serverless Lambda migration, full FinOps governance with cost allocation tags. → Business Impact: $264,000 annual savings - AWS costs cut by 75% in one week. ▪️ US Influence Platform → Challenge: Monthly AWS bill uncontrolled, infrastructure unaudited, site latency degrading. → Solution: Infrastructure audit + Terraform migration + reserved instance strategy. → Business Impact: Monthly AWS bill reduced by 50%. Site latency improved as a bonus. ▪️ ChilliSauce (UK Event Agency) → Challenge: AWS ECS/Fargate costs growing with no optimization strategy. → Solution: Continuous FinOps management, ECS rightsizing, Fargate cost controls. → Business Impact: 30% cost reduction maintained continuously. ▪️ Datos Health (Israeli HealthTech) → Challenge: No monitoring or alerting on GCP infrastructure - production issues discovered by users. → Solution: Monitoring and alerting built from scratch with Prometheus and Grafana on GCP. → Business Impact: Zero production blind spots. Engineering team now detects issues before users do. Core Delivery Areas → Forensic Cloud Cost Audits - identify immediate 20%+ savings before writing a single line of IaC → FinOps in CI/CD - cost guardrails embedded directly in your deployment pipeline, not managed by your finance team → AI workload cost optimization - GPU orchestration, vector database cost management, LLM infrastructure efficiency → Spot/Reserved Instance Strategy & Orchestration → Serverless architectural redesign (Lambda, ECS/Fargate) for cost-efficient scaling → DevSecOps: SOC 2, GDPR, HIPAA compliance, Zero Trust architecture, IAM hardening Stack: AWS (EKS, Lambda, EC2, S3, RDS, CloudFront) · GCP · Terraform · Kubernetes · Docker · GitHub Actions · ArgoCD · Prometheus · Grafana · Datadog · Apache Kafka · PostgreSQL · AI workloads Available during US business hours (EST/PST overlap). Cloud cost optimization is the highest-ROI DevOps investment in 2026. Send an invite - I'll show you exactly where your cloud budget is leaking.

I'm a UI UX Designer with 6+ years of practice in UX & UI Design, helping SaaS, EdTech, and AI-driven products ship intuitive, conversion-focused interfaces. ⭐⭐⭐⭐⭐ "Andrii is a fantastic designer with strong UX intuition and excellent Figma skills." (recent client review) 🎯 What I bring to your product as a UI UX Designer UIUX Designer: ✔️ As a UI UX Designer, I lead end-to-end product design: discovery, user research, wireframing, hi-fi UI in Figma, interactive prototyping, developer handoff. ✔️ As a UI/UX Designer, I specialize in SaaS web apps, AI-powered products, mobile apps (iOS & Android), and high-converting landing pages. ✔️ As a UIUX Designer, I build atomic design systems and component libraries that scale across multi-screen products. ✔️ As a UX/UI Designer, I work daily with React/Next.js engineering teams. My designs ship without rework. ✔️ As a UI & UX Designer, I deliver in Figma with developer-ready specs (responsive breakpoints, hover states, design tokens). 📊 Verified UI UX Designer work: 🔶 Notesight AI EdTech AI Notetaking: brand identity, mobile app UI, landing page (Loom walkthrough on request). 🔶 MyAnswer AI: AI Q&A platform mobile UI. 🔶 ReRick: mobile commerce experience. 🔶 SalesHub: sales team CRM dashboard. ▪ 6+ years of UI UX Design experience ▪ 50+ successful design projects shipped ▪ 100% Job Success Score on Upwork ▪ Top Rated Plus (via 2muchcoffee LLC agency) ▪ Daily Figma user (auto-layout, components, design tokens, dev handoff) ▪ Real engineering collaboration with a 2muchcoffee React/Next.js dev team 🤝 Let's Build Something Great Looking for an experienced UI/UX Designer UI UX Designer UIUX Designer UXUI Designer who ships production-quality Figma designs? Click "Invite" or "Message" to discuss your project goals. UI UX Designer, UIUX Designer, UI/UX Designer, UX/UI Designer, UI & UX Designer, Figma Designer, SaaS UI UX Designer, Mobile UI UX Designer, AI Product UI UX Designer, Landing Page UI UX Designer, EdTech UI UX Designer, Design System Designer, Web App UI UX Designer, Mobile App UI UX Designer, Conversion-Focused UI UX Designer, UI UX Designer Figma, UX Researcher, UI Designer, UX Designer

Hi, I’m a senior full-stack developer and product-minded engineer. I operate as a Full Stack Developer who thinks in terms of business value rather than just tickets. Over the last decade, I've led and coded complex web products for clients across Europe, the US, and the UK. As a Full Stack Developer and Backend Developer, I partner with founders, product owners, and marketing leaders who need a reliable technical partner to build SaaS platforms, CRMs, marketplaces, mobile apps, and high-performance websites. My work covers the full spectrum of Full Stack Developer responsibilities. As a Backend Developer, I architect scalable APIs and database structures using PHP (Laravel), Node.js, and Python. On the frontend, I build with React, Vue, and Angular. This Full Stack Developer versatility extends to React Native for mobile, where I function as a Mobile App Developer, and to custom WordPress solutions, where I serve as a WordPress Developer. Whether it's a Python Full Stack Developer scenario with Django/FastAPI or a .NET Full Stack enterprise environment, I adapt. ⚙️ What I Do Best Full Stack Developer ownership from architecture to launch and support. Backend Developer focus on SaaS platforms, booking engines, and internal tools. Full Stack Developer React Node ecosystems: interactive dashboards and complex workflows. WordPress Full Stack builds that are fast, secure, and easy for marketing teams to edit. Mobile App Developer delivery via React Native, fully integrated with custom backends. Senior Fullstack Developer guidance for integrations: CRMs, ERPs, payment gateways, and custom APIs. 🚀 Real Project Examples 📦 Self-Storage Ecosystem (EU) As lead Full Stack Developer and Backend Developer, I built a booking tool with ERP and payment automation (Full Stack Developer Laravel stack with Vue). This Full Stack Developer work took online reservations from zero to 170+ monthly and tripled signed contracts. 🎓 EdTech Matching Platform As Senior Fullstack Developer, I delivered three interconnected applications (Laravel/Vue) with a matching engine and accounting integrations. The Full Stack Developer React Node architecture increased sales by 190% year-over-year while keeping operations lean. 🐾 Social Utility App for Pet Owners Acting as both Mobile App Developer and Backend Developer, I built a React Native app and Laravel backend with maps, social features, and AI helpers. This Full Stack Developer project seamlessly blended native mobile and web. 📊 SEO Analytics SaaS In a Python Full Stack Developer role, I designed microservices with FastAPI and Node.js for high-load APIs and React frontends. The Full Stack Developer architecture processes thousands of active users reliably. 🧹 Cleaning Service Group Automation As a WordPress Developer and Full Stack Developer PHP expert, I built a custom CRM/ERP with scheduling and telephony integrations. The Web Developer and Backend Developer work automated coordination across three brands. 🛠 Tech I Use Daily Backend: PHP (Laravel, Filament), Node.js, Python Frontend: React, Vue, Nuxt, Alpine.js CMS: Custom WordPress Full Stack themes and plugins Mobile: React Native (I function as a Mobile App Developer) DB: MySQL, PostgreSQL, Redis DevOps: AWS, Docker, CI/CD APIs: Stripe, Mollie, Google API, OpenAI 🤝 How I Work ✅ I own delivery as a Full Stack Developer: architecture, code quality, and deadlines. ✅ I'm transparent about scope and risks as your Backend Developer partner. ✅ I take Full Stake ownership of outcomes, not just outputs. ✅ I can join ongoing projects or build from zero to scale. ✅ I act as a Web Developer and Senior Fullstack Developer who bridges technical execution with business impact. 💡 Why Clients Choose Me as Their Full Stack Developer Beyond writing clean code, I function as a true Full Stack Developer consultant. I've rescued stalled projects, modernized legacy PHP systems, and transitioned businesses from manual spreadsheets to fully automated WordPress Full Stack portals. As a React Developer at heart, I ensure every interface is intuitive and fast. Whether you need a Mobile App Developer for a companion app or a Backend Developer to untangle complex data flows, I bring Full Stack Developer React Node expertise and a Full Stake mindset to every engagement. My experience across .NET Full Stack environments and as a Python Full Stack Developer ensures I can evaluate the right tool for your specific business challenge, not just the one I know best. I'm comfortable acting as a fractional CTO or a Senior Fullstack Developer embedded with your existing team. As a Full Stack Developer and Backend Developer, I deliver React, Node.js, PHP, Mobile App Developer results, WordPress Developer sites, Python Full Stack Developer APIs, .NET Full Stack insights, and Full Stake commitment. Senior Fullstack Developer ready.