I help startups and B2B SaaS companies build, ship, and scale complete web applications powered by production-grade AI. Instead of hiring separate frontend, backend, and AI infrastructure engineers, I handle the entire product lifecycle — bridging the gap between robust, scalable full-stack architecture (NextJS, NodeJS, Python, AWS) and cutting-edge GenAI implementations (RAG pipelines, autonomous agents, and LLM orchestration). With 10+ years in full-stack development, $200K+ earned on Upwork, and a 100% Job Success Score (Top Rated Plus), I build with an ownership mindset to ensure your MVP hits the market fast and scales smoothly. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🌐 FULL-STACK & AI CAPABILITIES — WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → Full-Stack SaaS Platforms: Complete web applications with responsive UIs, secure multi-tenant auth, and complex business logic (React, NextJS, TypeScript). → AI Agents & Agentic Workflows: Multi-agent systems capable of autonomous execution, tool usage, and function calling (OpenAI, Claude, Gemini). → Production RAG Pipelines: Enterprise semantic search utilizing vector databases (Pinecone, pgvector, Qdrant) for accurate, private data querying. → Robust Backends & APIs: Highly performant, clean-code REST/GraphQL APIs and microservices (NodeJS, NestJS, Python, Express). → Automated Business Workflows: Intelligent document processing, automated lead scoring, and custom CRM/ERP AI integrations. INDUSTRIES I SERVE WITH AI + WEB SOLUTIONS: - Multifamily Real Estate — Custom web software layered over Yardi, AppFolio, Entrata, ResMan, RealPage, Apartments com - Hospitality / Hotels / Restaurants — AI booking flows, guest communication platforms, and review automation dashboards - MarTech / AdTech — Complete web analytics suites integrated with AdTech and MarTech API, and others like Meta, Google, TikTok, Yelp, and UberEats APIs ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏆 RESULTS FROM RECENT PROJECTS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ AI Voice Agent SaaS Platform — Complete frontend UI/UX redesign + Supabase backend refactor, delivered in 90 days ($7,000 fixed price, 5.0 ★) ✔ Senior NodeJS SaaS Integration — 816 hours of self-driven backend delivery on schedule across 6 months ($32,633, 5.0 ★) ✔ AI-Powered Real Estate Onboarding — Built the web frontend and AI backend workflow that reduced onboarding drop-off and boosted conversions. ✔ Enterprise Software — Systems built by my team are used daily by Cushman & Wakefield (Fortune 500 real estate firm). ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚙️ TECH STACK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ AI / LLM Integration: OpenAI API, Claude API, Gemini, LangChain, RAG, Vector Databases, Prompt Engineering, Function Calling, Structured Outputs Backend Development: Nodejs, NestJS, Python, Expressjs, Nextjs (Server Components) Frontend Development: React, TypeScript, Redux, Nextjs, Material UI, Tailwind CSS Mobile App Development: Flutter (Cross-platform, CI/CD with Codemagic) Cloud & DevOps: AWS (SQS, SNS, Lambda, RDS, ECS, ECR, CloudWatch, EventBridge, VPC, Route53, EC2), Terraform (IaC), Docker, Docker Swarm, Nginx Databases & Caching: PostgreSQL, MongoDB, MySQL, Redis, Pinecone, Qdrant, pgvector API & Enterprise Integrations (50+ types): REST / GraphQL / SOAP · OAuth2 / OIDC · Webhooks · ETL Pipelines · Payload Encryption ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏢 ENTERPRISE & THIRD-PARTY INTEGRATIONS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Property Management Systems (PMS): Yardi Voyager · AppFolio · Entrata · ResMan · RealPage · Apartments com Marketing & Social Platforms: Meta (FB/IG) · Google Suite · Twitter/X · TikTok · Yelp · UberEats Past Enterprise Client Impact: STIHL · Liebherr · Cushman & Wakefield ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🤝 HOW WE WORK TOGETHER ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → Discovery call → System architecture proposal → Milestone-based delivery → MVP in 6–12 weeks, production-ready scaling in 18–32 weeks → Available 30+ hrs/week, response time within 4–8 hours → Backed by a distributed team across 🇺🇦 🇵🇱 🇮🇹 🇷🇴 🇨🇦 if you need to scale resources rapidly I prioritize long-term, high-trust partnerships over quick fixes — 29 completed projects with an average engagement of 12-24 months. Let's jump on a call and map out what you're building.

$400M+ in transactions processed across platforms we built. 100,000+ tickets sold on a product shipped from zero. 20+ countries reached by an EdTech app delivered end-to-end. I'm not listing what's possible — I'm listing what's already running in production. I'm a full stack developer and software architect based in Israel, and the CEO of a 40+ engineer development agency. When you work with me, you get a senior technical partner who understands the code and the product — and a full team behind delivery when scope requires it. 🔹 Full Stack & SaaS Development Scalable multi-tenant architectures, B2B dashboards, internal tools, and AI-integrated SaaS. Core stack: React, Next.js, Vue.js, TypeScript, JavaScript, Python, Node.js, Laravel — full stack web developer depth from database schema to UI. 🔹 Fintech & Banking This is where I'm different from most full stack developers on this platform. We've built card issuing systems, treasury management platforms, AML/KYC pipelines, cross-border payment rails, and crypto-to-fiat flows. Live integrations: BlackRock, DocuSign, Salesforce, Rail API, Kraken, SEPA Instant. Production experience, not theoretical. 🔹 Mobile App Development Native iOS (Swift) and Android (Kotlin) for security-critical applications. React Native for cross-platform. My mobile portfolio includes a hardware-encrypted messenger with a built-in crypto wallet, a DeFi app, and a React Native aviation booking system — real-world apps built for real stakes. 🔹 Web3 & Blockchain EVM smart contract UIs, DeFi protocols, hardware-encrypted crypto wallets, seed-to-sale blockchain tracking, multi-chain no-code contract execution, tokenization platforms. 🔹 AI Integration LLM integrations, OpenAI API, RAG pipelines, multi-agent workflow automation, Fathom AI analytics, ClickHouse data infrastructure. I build AI as a functional product layer, not a feature checkbox. When you hire me as your full stack developer, you're not getting a solo freelancer bottleneck. You're getting a senior technical lead with backend, frontend, mobile, and DevOps teams — all behind one point of contact, one contract. Tech: Python · Django · FastAPI · React · Next.js · Vue.js · TypeScript · JavaScript · Node.js · Swift · Kotlin · React Native · PostgreSQL · MySQL · Redis · ClickHouse · AWS · GCP · Docker · Kubernetes · Solidity · Web3.js Send me a direct message to get 30-minute session to map your architecture, align on tech stack, or define your MVP roadmap before development begins.

• 𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹𝘀𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗶𝘁𝗵 𝗲𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗪𝗲𝗯 & 𝗠𝗼𝗯𝗶𝗹𝗲 & 𝗦𝗮𝗮𝗦 • 𝟏𝟒+ 𝘆𝗲𝗮𝗿𝘀 𝗶𝗻 𝘁𝗵𝗲 𝗜𝗧 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁, 𝘄𝗼𝗿𝗸𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗦𝗺𝗮𝗹𝗹, 𝗠𝗶𝗱𝗱𝗹𝗲 & 𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 𝗖𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 • 𝗢𝗻-𝗰𝗮𝗹𝗹 𝟐𝟒/𝟕 𝘁𝗼 𝗽𝗿𝗼𝘃𝗶𝗱𝗲 𝗽𝗿𝗼𝗷𝗲𝗰𝘁-𝘀𝗽𝗲𝗰𝗶𝗳𝗶𝗰 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗶𝗻𝗴 𝗮𝗻𝗱 𝗴𝘂𝗶𝗱𝗮𝗻𝗰𝗲. ᴅᴇᴠᴇʟᴏᴘᴍᴇɴᴛ ᴇxᴘᴇʀᴛɪsᴇ ꜰʀᴏɴᴛᴇɴᴅ & ᴡᴇʙ: React.js, Node, JavaScript, TypeScript, HTML, CSS, Bootstrap, Material UI, Tailwind CSS, PHP, Java, Python ᴍᴏʙɪʟᴇ ᴀᴘᴘʟɪᴄᴀᴛɪᴏɴ: cross-platform frameworks - React Native, Flutter; native development - Swift, Kotlin, Objective-C ᴄᴍs: WordPress, Drupal, Magento, Umbraco ᴅᴀᴛᴀʙᴀsᴇs: MySQL, Microsoft SQL Server, PostgreSQL, MongoDB, MariaDB sᴘᴇᴄɪᴀʟɪᴢᴀᴛɪᴏɴ - Healthcare, Wellness, Fitness - Human Resources, Social Media - B2B/Business Management - AI SaaS, FinTech ᴘʀᴏᴄᴇss ᴏꜰ ᴡᴏʀᴋ Consultation 〉 Estimate 〉 Plan 〉 Develop 〉 Test 〉Deploy〉Support Transparency of the process, communication & sync on every step. ᴡʜʏ ᴡᴏʀᴋ ᴡɪᴛʜ ᴍᴇ? - 14+ years in IT leadership, driving innovation and delivering lasting software solutions for enterprise clients. - Founder & CEO of Dexis — hands-on with strategy, delivery, and team growth to ensure client success. - Human-centered approach, blending business analysis, tech expertise, and HR insights for scalable, tailored solutions. 𝗧𝗲𝗹𝗹 𝗺𝗲 𝘄𝗵𝗮𝘁 𝘆𝗼𝘂 𝗻𝗲𝗲𝗱 — 𝗜’𝗹𝗹 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝗯𝘂𝗶𝗹𝗱 𝘁𝗵𝗲 𝘀𝗺𝗮𝗿𝘁𝗲𝘀𝘁 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻. 𝗚𝗲𝘁 𝗶𝗻 𝘁𝗼𝘂𝗰𝗵! ᴋᴇʏᴡᴏʀᴅs Full-Stack Development, Web Development, Solution Architecture, Web Application, Mobile App Development, Microservice, Central Desktop Development, Cross-Device Compatibility, Web Development Consultation, React Native, JavaScript, Node.js, Golang, Mobile App, App Development, IT Compliance Audit, HIPAA, React, Database, Mobile Development Framework, Hybrid App Development, Mobile App Improvement, Mobile App Localization, Android App Development, iOS Development, Mobile App Testing, Web App Localization, Android App, Startup Company, Business with 1000+ Employees, Business with 1-9 Employees, Business with 10-99 Employees, Cross-Device Compatibility, App Feature Development, Innovation Strategy, App Development, Application Integration Software, Application Integration, Application Optimization, Application Audit, Windows App Development, Web Accessibility, Web Application Audit, Enterprise Software Development, IT Compliance Audit Web Analytics Report, Security Engineering, API Documentation, Web Analytics Software, API Blueprint GDPR Compliance Review, PCI, Compliance Testing, API Testing, Web Analytics Bug Fix, API Framework, Back-End Development Framework, NodeJS Framework, Compliance Consultation Innovation Strategy, AI Compliance, Web API, Security Analysis, Data Integration, GDPR, Security Infrastructure, Web App Localization, Web Accessibility, PCI DSS, Security Assessment & Testing Compliance, Security Framework, IT Infrastructure, IT Consultation, Database Integration, Database Administration, Database Development, Back-End Development, REST API, Web Service RESTful API, Infrastructure as Code, API Integration, API, Software Architecture & Design, Database Design, Database Architecture, Database Maintenance,Requirements Specification Database, Data Access Layer, Mobile App Redesign, Mobile App Testing, Mobile App Bug Fix, Mobile App Localization, Mobile App Development Consultation, AI Mobile App Development, Landing Page Front-End Development, Web Application, Responsive Design, Website, Agile Software Development UI Animation, Website Redesign, Page Speed Optimization, Ecommerce Website, Blog, Google Chrome Extension, Cloud Development, Cloud Infrastructure, Cloud Optimization, AWS Solutions, Google Cloud Platform (GCP), Microsoft Azure, Serverless Architecture, Scalability, Cost Efficiency, Cloud Security, DevOps Practices, Infrastructure as Code (IaC), Multi-Cloud Strategy, Cloud Migration, Performance Tuning, Disaster Recovery, Cloud-Native Applications, Kubernetes Management, Load Balancing, Virtualization, Cloud Monitoring and Analytics, Hybrid Cloud Solutions, High Availability Systems, Containerization, Data Backup and Recovery, Compliance and Governance

I am experienced Senior Full Stack Developer proficient in PHP/Laravel and JavaScript/Vue.js. I have over 11 years of experience in projects of varying complexities: social networks, CRMs, High-loaded e-commerce, educational platforms. I am passionate about learning new technologies and implementing innovative projects to life.

⭐⭐⭐⭐⭐ "The final result and customer satisfaction exceed expectations" - Gleb Goloborodko, Founder, GetCode ⭐⭐⭐⭐⭐ "Their team respects our internal situation while being proactive towards upcoming issues" - Pavol Norulak, Managing Director & Co-Founder, NSI I help product teams build backend systems that scale cleanly - multi-tenant SaaS platforms, B2B product backends, eCommerce infrastructure, and async event-driven architectures that stay reliable when traffic, data, and requirements grow. 𝗪𝗵𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗰𝗵𝗼𝗼𝘀𝗲 𝘁𝗼 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝗺𝗲 • Architecture-first thinking - the right design decision on day one prevents expensive rewrites later • Milestone-based delivery with demos and documentation at every stage - no black-box development • Early risk identification - scope and budget issues surfaced before they become problems • One senior developer who also manages the project - clear communication, no handoffs, no surprises • Long-term technical partnership mindset - accountable for outcomes, not just code delivery • Production-ready from day one: test coverage, CI/CD, structured logging, error monitoring Over 8 years, my team at Angle2 and I have shipped SaaS platforms, marketplaces, CRMs, B2B portals, analytics platforms, job boards, and payment-integrated products across fintech, eCommerce, and enterprise software - on time, within scope, with full documentation. My 14+ years in project management means you get senior development combined with predictable delivery 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 & 𝗦𝗮𝗮𝗦 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 • SaaS & B2B backends: multi-tenant architecture, tenant isolation, row-level security, role-based access control, OAuth / authentication, audit logging • eCommerce & marketplace systems: product catalogues, order management, inventory, payment flows, webhook event handling • Payment integrations: Stripe Connect (Standard & Express), subscription billing, split-payment flows, async webhook handling • APIs: Django REST Framework, FastAPI, RESTful API design, REST API, third-party integrations (Stripe, Twilio, OpenAI, Gmail API) • Async systems: AsyncIO, Celery, Redis, background workers, job scheduling, distributed event processing • Data processing: ETL pipelines, web scraping, PDF/document parsing, bulk CSV ingestion, data workflows • Cloud & DevOps: AWS, GCP, Azure, Docker, CI/CD (GitHub Actions, GitLab CI), structured logging, error monitoring 𝗔𝗜 & 𝗟𝗟𝗠-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 • Intelligent assistants and AI-powered features using LangChain, OpenAI API, and RAG pipelines • Vector search and semantic retrieval: FAISS, Pinecone, vector database integrations • LLM workflows integrated into structured backend APIs with production stability • System architecture for AI-enabled products - reliable, scalable, maintainable 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 • SaaS MVP development - system architecture through production-ready deployment • Multi-tenant platform builds - data isolation, tenant management, subscription tiers • eCommerce backend development - marketplace logic, inventory, fulfilment integrations • Payment system integration - Stripe Connect, subscription billing, webhook pipelines • AI / LLM integration - LangChain, RAG pipelines, vector search, OpenAI API • Backend architecture audits and implementation roadmaps • PostgreSQL schema design and query optimisation • Django to FastAPI migration planning • AWS / GCP cloud architecture review and cost optimisation • CI/CD pipeline setup - production-ready from day one My background is senior Python backend development - 8 years of building SaaS platforms, B2B product backends, and eCommerce infrastructure using FastAPI, Django REST Framework, AsyncIO, Celery, PostgreSQL, Redis, AWS, and GCP. I focus on projects where architecture matters from day one - multi-tenant SaaS platforms, marketplace backends, B2B portals, and eCommerce systems where scale and reliability are not optional. Beyond core backend work, I integrate LangChain, RAG pipelines, and OpenAI API into production systems - built to be stable, maintainable, and part of a real product rather than a prototype. If you are building a SaaS platform, a marketplace, a B2B portal, or a payment-integrated product and need a senior Python backend developer who manages the delivery end to end - I would like to hear about it.

👋 𝗛𝗲𝗹𝗹𝗼! ✅ Full-Stack & Back-End Developer with 5+ years of experience ✅ Node.js · NestJS · Django/DRF · React · Next.js · TypeScript · PostgreSQL · Docker I build reliable, scalable web applications — from clean REST APIs and microservices to full-stack products with polished frontends. I work across the entire stack and take ownership of infrastructure too. ⚡️ 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗱𝗼 𝗳𝗼𝗿 𝘆𝗼𝘂: + Build or extend back-end APIs (NestJS, Express, Django/DRF) + Develop full-stack web applications (React, Next.js + Node.js/Django) + Set up and manage server infrastructure (Docker, VPS, Nginx, CI/CD) + Integrate third-party services and payment systems + Improve and refactor existing codebases 𝗖𝗼𝗺𝗽𝗲𝘁𝗲𝗻𝗰𝗶𝗲𝘀: ⚒️ Back-End: NestJS, Express.js, Django/DRF, Node.js, TypeScript, GraphQL, WebSockets, Celery (Beat & Worker), Redis, JWT, AWS Cognito ⚒️ Front-End: React, Next.js (SSR/SSG), Redux, Zustand, D3.js, Chart.js, styled-components, Material UI, Ant Design, SCSS/SASS ⚒️ Databases: PostgreSQL, MySQL, MongoDB, Supabase — TypeORM, Prisma, Sequelize ⚒️ DevOps & Infrastructure: Docker, Docker Compose, Nginx, PM2, GitHub Actions, GitLab CI, VPS setup & management, SSH, DNS, SSL certificates, Cloudflare ⚒️ Cloud & Storage: AWS (S3, EC2), Cloudflare R2, Firebase, Supabase, GoDaddy ⚒️ Monitoring: Sentry ⚒️ Third-Party Integrations: ❇️ Payments: Stripe, Monobank, PayPal, Webhook solutions ❇️ Messaging: SendGrid, Mailjet ❇️ Documents: PandaDoc ❇️ CMS: Strapi, Contentful ❇️ Auth: AWS Cognito, JWT, OAuth2 ❇️ AI: OpenAI API ❇️ Other: AWS Amplify, Firebase On the back end, I build production-grade REST APIs and microservices using NestJS (TypeORM, PostgreSQL, WebSockets, GraphQL, Redis) and Django/DRF (PostgreSQL, Celery for async tasks, background workers). I focus on clean architecture, performance, and maintainability — whether it's a greenfield project or extending an existing codebase. On the front end, I build responsive, performant UIs with React and Next.js — covering SSR/SSG, state management (Redux, Zustand), and third-party API integrations. For infrastructure, I handle the full DevOps cycle: Docker containerization, CI/CD pipelines (GitHub Actions, GitLab CI), Nginx reverse proxy with SSL, VPS provisioning, and cloud storage with AWS S3 or Cloudflare R2. I take pride in clear communication, clean code, and delivering work I'd be happy to put my name on. Looking forward to hearing from you! I'm ready to start 𝗔𝗦𝗔𝗣 🔥

As a forward-thinking Senior Engineer and Team Leader with over two decades of experience, I work as a full stack developer specializing in Video Streaming and real-time communication solutions based on WebRTC. I combine strong architecture thinking with hands-on delivery, acting both as a technical leader and a practical full stack web developer who understands real product needs and builds scalable WebRTC-powered systems. Today, my focus as a full stack developer includes the strategic application of advanced AI technologies alongside WebRTC-based real-time communication platforms. I actively work with OpenAI APIs, Whisper for speech recognition, LLaMA2 for open-source large language models, and LangChain for building AI-driven workflows. This positions me as a full stack developer AI who can integrate intelligence directly into real-world WebRTC video and streaming products. Throughout my career as a full stack developer, I’ve contributed to Telemedicine, Online Education, and Real-time Entertainment by building WebRTC-powered communication platforms. I’ve led teams delivering webinar platforms, live chat systems, and complex real-time applications, acting both as a senior web developer and system architect who ensures scalability, security, and long-term maintainability for WebRTC infrastructures. In AI-focused projects, I operate as a full stack developer who bridges data, logic, and user experience inside WebRTC-enabled applications. My team and I integrate conversational AI, speech-to-text, and knowledge-driven systems using OpenAI, Whisper, and LLaMA2. With LangChain, we design intelligent pipelines that automate workflows and data processing, enhancing WebRTC communication platforms with AI-driven capabilities. WebRTC remains a core part of my work as a full stack developer, especially for building high-performance real-time systems. We design everything from low-latency WebRTC infrastructure to complete applications, delivering solutions that work seamlessly across web and mobile. This includes building scalable video streaming app architectures capable of handling thousands of concurrent users through WebRTC. As a full stack developer, I also provide consulting and development services across North America and Europe, helping companies design and build WebRTC-based video communication platforms. I work with companies in Entertainment, E-Learning, Healthcare, and Finance. Depending on project needs, I act as a React developer, Wordpress developer, or mobile app developer while implementing scalable WebRTC solutions. Our services as a full stack developer team include system architecture, UI/UX design, and custom development of WebRTC streaming and real-time communication platforms. We build modern interfaces, robust back-ends, and real-time systems, including secure WebRTC video stream delivery for live and on-demand use cases. We have worked with most of the major Webinar and Online Education platforms on the market, delivering solutions as a full stack developer team that understands both the business and technical sides of WebRTC video streaming products. We frequently modernize existing platforms and migrate legacy systems to scalable cloud-based architectures built around WebRTC technologies. As a full stack developer, I’ve led the creation of webinar systems, live chat apps, WebRTC video conferencing platforms, real-time video auctions, messengers, e-learning platforms, telemedicine solutions, dating apps, Twitch-like platforms, TikTok-style apps, VoD systems, and live shopping platforms. Many of these solutions rely on modern stacks including full stack developer React and full stack Lavarel approaches integrated with WebRTC. Beyond development, I support clients as a full stack developer with load testing and performance optimization for large-scale WebRTC streaming systems. My background across front-end, back-end, databases, and cloud platforms allows me to lead projects end-to-end and deliver reliable, production-ready WebRTC platforms. I invite you to collaborate with me as a full stack developer who understands AI, WebRTC, and scalable real-time product development. Together, we can build innovative WebRTC-powered solutions that align with your business goals and grow with your users.

Great to meet you all virtually! My name is Yelysaveta, and I'm here to help you unlock the full potential of your e-commerce business. I represent DevIT Group, an IT agency based in Ukraine. We are a dedicated team of Shopify Developers and Shopify Experts who focus 100% on building high-converting, scalable, and technically flawless online stores. 💡✨ We prioritize clear, transparent, and proactive communication 🤝. We treat your store's performance and conversion rates as our top priority, ensuring that your technical challenges are solved smoothly and timelines are strictly met. 🚀 Instead of generic solutions, we leverage the latest capabilities of the Shopify ecosystem to build tailored, high-performance web applications. 🌟 Core Shopify Expertise & High-Value Keywords: - Shopify OS 2.0 & Custom Theme Architecture: Crafting pixel-perfect storefronts using Liquid and JSON templates, with a strong focus on section-ready setups for effortless merchant editing. - Checkout Extensibility & Shopify Functions: Implementing modern UI extensions, custom discount rules, and advanced delivery/payment logic to replace deprecated checkout setups. - Data Architecture (Metafields & Metaobjects): Building robust structures for complex product fitering, dynamic content presentation, and advanced catalog management. - Seamless Platform Migrations: Safe and flawless transition of large catalogs (including 10k+ products) from BigCommerce, Shopware, Magento, or WooCommerce to Shopify with zero data or SEO loss. - Advanced Custom Functionality: Engineering interactive features such as real-time 3D product configurators, custom subscription models, and complex tiered/B2B pricing systems. - Headless Commerce: Building ultra-fast storefronts using Shopify Hydrogen, Oxygen, Remix, and Next.js for maximum performance. - Performance Optimization & CRO: Deep Liquid code auditing, script optimization, and application overhead reduction to achieve top-tier mobile PageSpeed scores. 🛠️ Our Targeted Shopify Tech Stack: Shopify Core & Frontend: ✓ Platforms: Shopify, Shopify Plus ✓ Architecture: Shopify OS 2.0, Liquid, JSON Templates ✓ Frontend Languages: JavaScript, TypeScript, Tailwind CSS, SASS App Development & Headless: ✓ Custom App Frameworks: Remix, Node.js, PHP (Laravel) ✓ APIs & Data: GraphQL Admin & Storefront APIs, REST Admin API, Shopify App Bridge ✓ Headless Stack: Shopify Hydrogen, Oxygen, React, Next.js Integrations & Ecosystem Tools: ✓ Payment Gateways: Stripe, PayPal, Adyen, Custom Gateway configurations ✓ Core E-commerce Extensions: Klaviyo, Subscription apps, advanced Inventory and ERP syncing, Matrixify, Search & Discovery logic We approach every contract with a product-focused mindset. We don't just write code; we optimize your customer journey to scale your revenue. 📊 Message me today, let's discuss your store's specific requirements and find the perfect technical execution for your ideas. Always happy to hear from you!

Hello! I'm Oleksii, the proud lead of Smart-UI, where we harness the collective power of senior full-stack developers to bring your most ambitious web development projects to life. 🎯 Your Vision, Our Expertise Under the umbrella of Smart-UI, our team has been the catalyst behind numerous successful web projects over the past 6 years. We specialize in crafting scalable, high-performance web applications using a robust tech stack that includes React.js, Next.js, Python/Django, and Node.js. 💼 Bridging Strategy and Execution As a seasoned full-stack leader, I ensure our projects are not just code-complete but also strategically aligned with your business objectives. My role is to guarantee that our technical execution adheres to the highest standards while staying true to your strategic goals. 🔥 Tech Stack Proficiency Frontend: Crafting intuitive, and dynamic user experiences with React.js and Next.js. Backend: Robust and scalable backend solutions using Python/Django and Node.js. APIs & Integrations: Streamlining business processes through smart API use and third-party integrations. 💡 Proven Problem-Solving Prowess Our development approach is centered around solving your business challenges. We delve deep to understand the problem at hand and then architect solutions that are not just technically sound but also business-smart. 🔄 Agile & Adaptive Development Navigating through the realms of Agile, our team ensures that projects are delivered in a iterative, timely, and quality-assured manner. Your feedback is seamlessly integrated at every step to ensure the end product is precisely what you need. 🌍 Global Collaboration While we’re based in Ukraine, our clients hail from all corners of the globe. We’re adept at navigating time zone differences and ensuring smooth, remote collaboration. 📈 Driving Your Digital Success Let’s embark on a journey where your ideas are transformed into digital realities. By choosing Smart-UI, you're not just gaining developers; you're pa

🔥 Having 22+ years of solid Technology R&D experience, I've been delivering global SaaS products as a full stack developer, versatile web developer, expert software developer, and dedicated saas developer. I partner with startups and F500 clients (Pfizer, Deutsche Bank, ING, Upwork, KLM, Ford) who need a complete full stack developer and mobile app developer proficient in React, vue, angular, Node.js, and Python. Whether your web project requires a highly interactive frontend engineered by a specialist react developer using vue and angular, a scalable .NET or golang architecture, a custom CMS built by a senior wordpress developer, or a dedicated Back End Developer to build secure Rust and solana microservices, my role as your full stack developer and software developer ensures immediate success. I bring deep expertise in JavaScript, PHP, and AI integrations, while also understanding the business side of saas sales and saas marketing, to build high-performance SaaS applications, proving that a seasoned full stack developer, web developer, and saas developer is the key to true digital web transformation. ⭐ Certified full stack developer, react developer, software developer, & saas developer Top Rated+ | 🏆 100% full stack developer Success for every SaaS contract utilizing React, vue, angular, Node.js, Python, golang, and Rust | ⭐ 5-star Rating for web, mobile app developer projects, AI, Web3 via solana, and SaaS | 💰 $300K+ earned delivering excellence as an elite full stack developer, web developer, software developer, and wordpress developer. My Python, JavaScript, .NET, golang, and PHP web solutions are built to scale globally and accelerate your saas sales and saas marketing efforts as a premier full stack developer and mobile app developer. ⭐ Extensive full stack developer and software developer expertise across web, mobile, and SaaS platforms. I serve as a complete full stack developer, web developer, Back End Developer, and saas developer, seamlessly integrating AI models and Web3 components (including solana smart contracts) into robust web systems. My technical arsenal for full stack developer projects includes the MERN stack using React and Node.js (excelling as a lead react developer), modern frontend frameworks like vue and angular, enterprise-grade .NET and golang Web APIs, scalable CMS platforms as a wordpress developer, and memory-safe Rust modules for solana ecosystems. By combining core JavaScript, advanced React, vue, and angular ecosystems, scalable Node.js and golang microservices, stable PHP databases, and smart AI features, I deliver exactly what every client wants from a top-tier full stack developer, cross-platform mobile app developer, software developer, and Back End Developer. Whether architecting a new SaaS platform in .NET, optimizing core financial engines in Rust or golang, deploying a custom theme as a wordpress developer, boosting technical infrastructure for saas marketing and saas sales, or scripting in Python for complex data processing, my full stack developer and saas developer approach covers all web and AI requirements. 🤖 Solid full stack developer and software developer experience across various high-load SaaS domains (Finance, PropTech, HRTech, Travel, eCommerce) relying heavily on flawless custom full stack developer execution. I thrive specifically as a dedicated React full stack developer, react developer, Node.js Architect, elite Back End Developer, and strategic saas developer, seamlessly blending AI performance, golang APIs, and Rust (including solana blockchains) into traditional SaaS workflows. My background as a full stack developer, web developer, and mobile app developer means I confidently utilize Python, golang, and Rust for heavy FinTech data analytics, .NET and PHP for robust eCommerce SaaS web portals, versatile CMS setups as a wordpress developer, and modern JavaScript, vue, angular, and React for interactive PropTech web dashboards. 🔥 Certified full stack developer Engineering and Solution Architect Expert (Ph.D. CS, PMP, CSP, CSM, CSPO, ICP-PPM, MCP). I deliver Agile/Scrum SaaS solutions as a lead full stack developer, dedicated react developer, software developer, and saas developer focused on web, AI, React, vue, angular, Rust, solana, golang, and .NET innovation. Managing cross-functional teams as a full stack developer, I ensure strict coding best practices across dynamic React, vue, and angular UIs, iOS/Android builds guided by a senior mobile app developer, Node.js, golang, and PHP backends, Web3 solana integrations, legacy .NET migrations, bespoke CMS builds managed by a wordpress developer, and sophisticated Python integrations designed to maximize your saas sales and saas marketing ROI. Every SaaS interface, web module, and Back End Developer component I architect meets the rigorous standards expected from a master full stack developer, saas developer, and web developer utilizing JavaScript and Rust. *Last Updated: 3.07.2026