Abuzar K.

100% Job Success Score | Top Rated | 25 Projects Completed on Upwork I am a Full Stack Developer and Email Marketing Expert who builds React-based web applications, admin dashboards, and full stack MERN systems, and sets up Klaviyo and Omnisend email automation for e-commerce brands that need real revenue-driving flows, not just one-off campaigns. Most clients hire me because I connect the frontend, backend, and email marketing system together, instead of handing you off to three freelancers who never talk to each other. As a React Developer, I build component-based applications with clean state management, authentication, routing, and responsive design. As a Node.js Developer, I build REST APIs, Express backends, and MongoDB data layers. As a Backend Developer, I handle authentication and database architecture so your app holds up under real usage. As an Email Marketing Expert, I build Klaviyo and Omnisend systems including welcome sequences, abandoned cart flows, post-purchase campaigns, and segmentation that convert. As a Full Stack Developer, I take ownership end-to-end and don't stop at the component level. As a SaaS Developer and Dashboard Developer, I build admin dashboards with charts, filters, real-time updates, and role-based permissions, using Retool for speed or custom React for full control. As an E-commerce Developer, I work with Shopify theme customization and checkout optimization. As a Klaviyo Expert and Omnisend Expert, I design flows for brands that depend on email as a revenue channel, not an afterthought. WHAT I BUILD AS A FULL STACK DEVELOPER: React Web Applications - Component-based apps with clean state management, API integration, authentication, routing, and responsive design (Vite or CRA). Admin Dashboards & Internal Tools - Dashboards with charts, filters, real-time updates, and permissions. Built in Retool or custom React. I've built dashboards used daily for operations management. Full Stack MERN Applications - React frontend, Node.js/Express backend, MongoDB, REST APIs, authentication, file uploads, third-party integrations. E-commerce Frontend Development - Shopify theme customization, custom storefront components, checkout optimization for conversion. Responsive UI From Figma - Production-ready React/HTML with precise spacing, typography, and cross-browser compatibility. WHAT I BUILD AS AN EMAIL MARKETING EXPERT: Klaviyo & Omnisend Automation - Welcome sequences, abandoned cart flows, post-purchase and win-back campaigns built to run on their own and keep generating revenue. Segmentation & Campaign Strategy - List segmentation, campaign calendars, and HTML email templates built around customer behavior. TECHNICAL STACK: Frontend: React.js, JavaScript, TypeScript, HTML5, CSS3, Tailwind CSS, Material UI Backend: Node.js, Express.js, REST APIs, WebSockets Database: MongoDB, MySQL | Mobile: React Native Email: Klaviyo, Omnisend, HTML Email Development Tools: Git, GitHub, Vite, Figma to Code PROJECTS DELIVERED: - Retool Dashboards: internal business dashboards with data visualization, used daily for operations - Frontend QA & Development (12-month contract): pixel-perfect UI, caught bugs before production - Squarespace Custom Features: "Abuzar really knows his stuff. Very responsive, kind and knowledgeable." - Web Application Development: converted existing source code into a working application, delivered on time - Mailmorphix Email Agency Website: built with React and Tailwind CSS, combining Full Stack Development and Email Marketing in one project CLIENT FEEDBACK: "He was very knowledgeable, fast and efficient and has a keen eye for detail." "Committed to quality. Reliable. Detail oriented." - across multiple contracts HIRE ME IF: - You need a React frontend with clean component structure and responsive design - Your dashboard or internal tool needs a developer who understands UI and data - You run an e-commerce store and need Klaviyo/Omnisend automations, not just newsletters - You need an MVP built with MERN and want one developer handling all of it - You want a Full Stack Developer who also understands email marketing - You want clear communication and on-time delivery, no constant follow-up needed NOT A GOOD FIT IF: - You need a backend-heavy app with complex server architecture as the primary scope - You're hiring on the lowest hourly rate alone - You expect enterprise-scale systems delivered in unrealistically short timeframes PROCESS: Requirements review & timeline confirmation, core development with daily updates and a mid-point demo, then cross-browser/device testing and deployment support. Send me your project details and I'll respond with a clear approach and timeline within 24 hours.