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I build complete B2B SaaS platforms — from database architecture to live payments. Next.js · TypeScript · PostgreSQL · Stripe Connect · Supabase I'm Agustina, a full-stack developer based in Spain. I specialize in B2B SaaS products with real-time operations, complex payment flows and multi-tenant architectures. I build platforms where businesses are the customers: subscription billing, feature gating by plan, operator dashboards and full data isolation between tenants. I deliver clean, tested code that another developer can read and maintain. What I've built MyDigitable · A complete B2B multi-tenant SaaS, built solo over 8 months. Businesses subscribe to manage their operations; their customers interact through a public-facing interface with no account required. 12 product areas · 250+ features in production · Stripe Connect with direct payouts, split payments, subscriptions, trial periods and refunds · two-sided marketplace with candidate matching and real-time urgent notifications · public digital menu in 15 languages with automatic language detection · AI-powered catalog import from photo or PDF · WhatsApp notifications via Twilio · feature gating enforced across 4 layers: server, middleware, navigation and UI · 452 test files · zero TypeScript errors · clean build. Stack: Next.js 14 App Router · TypeScript · Supabase · PostgreSQL with RLS · Stripe Connect · Twilio · Resend · Sentry · Vercel Popey · B2B ticketing and operations platform for tourist transport in Uruguay. Multiple operators sell through a single platform, each with their own commission rules, sales reporting and automated settlements. Real-time availability calendar · digital QR tickets · per-operator revenue management · admin panel with full financial reporting. The Namkhan Resort (Laos) Full redesign, SEO, Google and Meta Ads, Cloudbeds integration for real-time booking sync and Looker Studio dashboards for daily occupancy and revenue tracking. What I can help you with · B2B SaaS from scratch: multi-tenant architecture, authentication, roles and permissions, subscription plans and feature gating · Payments: Stripe and Stripe Connect, recurring billing, trial periods, split payments, refunds and webhooks with idempotency · Operator platforms: multi-channel dashboards, commission management, settlements and financial reporting · Databases: PostgreSQL and Supabase with row-level security and full tenant isolation · Modern web apps: Next.js 14, React, TypeScript, TailwindCSS, mobile-first · Integrations: Twilio, Resend, OpenAI, Google Analytics, Sentry How I work I write tests from day one. I deliver typed, error-free, documented code that another developer can maintain without friction. Fully remote · native Spanish · fluent English · European hours · same-day replies. Building a B2B product from scratch, or have a half-finished platform that needs a push? Message me and I'll give you an honest take on what it would take.

Before diving into the technical details, here’s a quick look at what I do as a Full-Stack Engineer: With 7+ years of experience, I’ve built smooth, responsive and visually polished web interfaces supported by solid full-stack logic. Startups and small teams rely on me to turn ideas, wireframes and Figma designs into fast, reliable applications built with React, Next.js, TypeScript, Supabase and Node.js. Instead of just writing code, my focus is on collaborating closely with clients to deliver real, practical products like MVPs, dashboards and internal tools that solve everyday problems. Why clients choose to work with me: • 7+ years building SaaS products and MVPs • Led frontend development for multiple startups • Built microfrontends and internal tools used across all Inditex brands • Product-focused: strong understanding of UX, scalability and clean architecture • Fast delivery, clear communication and reliable collaboration Tech stack: ⭐ Frontend: React, Next.js, TypeScript, Tailwind, Zustand ⚙️ Backend: Node.js, Supabase, MongoDB, PostgreSQL, Firebase, GraphQL, REST 🧰 Tools: Jest, NX (microfrontends), WordPress, Strapi, Prismic, Contentful, Figma Whether you need something built from scratch or improvements to an existing product, I focus on clean code, scalability and delivering work that feels intuitive, fast and user-friendly. I can comfortably work with both European and U.S. time zones when needed. If you have a project in mind, feel free to reach out. I'm always open to discussing ideas or answering questions before we start. Let’s build something great together. 🚀

⭐️ Speed without cutting corners: working code on time, every time ⭐️ Budget discipline: every billed hour is justified — no filler tasks ⭐️ Business-first thinking: I understand the problem before I write code, so your budget goes into the product, not experiments 👋 Hi! My name is Anton. I'm a React Developer specializing in SaaS, AI-powered web applications, and B2B platforms. My work also spans Full Stack Developer React Node and Front End Developer work — production-ready code, built for founders shipping SaaS, AI, and B2B products, with a React Developer who owns the whole process, 6+ years helping startups and businesses. ⭐ Top Rated Plus 📅 6+ years as a React Developer 📦 70+ projects delivered ⏱️ 5,000+ Upwork hours 🔁 ~70% returning clients ✅ Why hire me as a React Developer ▪ 6+ years as a React Developer across SaaS, AI, and B2B platforms ▪ 70+ delivered projects as a React Developer, plus Full Stack Developer React Node engagements ▪ 5,000+ Upwork hours logged as a React Native Developer, alongside Full Stack Developer React Node builds ▪ ~70% returning clients — a track record built as a React Developer through partnerships lasting months to years ▪ Top Rated Plus status reflects steady delivery as a Front End Developer, with a track record of on-time launches ▪ A React Developer at the core — React, Next.js, and TypeScript power every build I ship ▪ A React Developer who ships production-ready code, whether the job calls for Full Stack Developer React Node or Web Developer work 🏗️ Full-Stack SaaS & B2B Platforms As a React Developer and Full Stack Developer React Node, I build multi-tenant B2B SaaS platforms with React, Next.js, and Node.js — OWASP-compliant authentication, role-based access control, custom workflow logic, and full Stripe billing (Subscriptions and Connect), backed by PostgreSQL via Prisma with REST and GraphQL APIs on AWS. On the AI side, as a Full Stack Developer AI, I build AI-powered SaaS products with the OpenAI and Anthropic APIs — RAG pipelines, embeddings, semantic search, Supabase Realtime streaming, Stripe Checkout, and offline-ready PWAs on Vercel. 🖥️ Front-End & React Development As a Front End Developer React specialist, I deliver Core Web Vitals-optimized, accessible, responsive interfaces with deep App Router, Server Components, SSR/SSG, and ISR experience. Firebase-backed projects get the same coverage as a React Developer Firebase build. Designs handed off from Figma go through me as a Front End Developer Figma-to-code specialist. As a React Developer, my work also covers two-sided marketplaces, e-commerce, booking systems, real-time chat, and analytics dashboards, extending to iOS and Android via React Native App Developer work with React Native and Expo. 🧭 Process Every engagement as a React Developer opens with scoping the business problem, then architecture, build, and testing with Jest, Vitest, or Playwright, Sentry monitoring, and GitHub Actions CI/CD — the same process behind every Full Stack Developer React Node platform and Front End Developer build, clean front-end development from first commit to production deploy. ⚙️ Tech Stack As a React Developer, I build the frontend with React, Next.js, TypeScript, HTML5, CSS 3, and JavaScript — styling with Tailwind CSS or Bootstrap and handling state with Redux or Zustand. The backend runs on Node.js via Express or NestJS, talking to PostgreSQL through Prisma, or Supabase and Firebase for managed auth and real-time. I deploy to AWS or Vercel with GitHub Actions running CI/CD — the same setup any React Developer needs to ship fast. 🧩 Mixed-Stack Support Python, PHP, Laravel, MySQL, MongoDB, Redis, WordPress, Java, FastAPI, jQuery, Vue.js, and Web3 round out the toolkit. As a Python Developer and Python Full Stack Developer, I handle Python-backed services on request. WordPress and Shopify builds run the same way — a WordPress Developer or WordPress Front End Developer handoff, a Full Stack Developer Shopify build, or a Shopify Front End Developer storefront, all delivered dev-ready. As a Mobile App Developer, I pick up inherited code and mixed stacks quickly, with Web Design and Responsive Design principles carrying through every build. 🏭 Industries SaaS & B2B, AI Startups, Marketplaces & E-commerce, Fintech, Healthtech, Ed-tech, and Real estate — where my React Developer and Full Stack Developer React Node work has landed. 🎯 What clients hire me for Scalable web applications, secure REST and GraphQL APIs, high-performance Next.js front-ends, and reliable, production-ready SaaS — that's what clients bring a React Developer on for. Full Stack Developer React Node and Front End Developer let me deliver end to end, backed by 70+ projects, 6+ years, and ~70% returning clients. Building, scaling, or improving a product? I work as a React Developer, backed by Full Stack Developer React Node, Front End Developer, React Native Developer, and Web Developer — let's talk on a quick call. 👇

I help business owners transform their operations with AI - not by pushing technology, but by understanding what's actually slowing you down first. Most developers build what you ask for. I figure out what you actually need. Through discovery calls and team surveys, I identify the bottlenecks eating up your team's time, then design and build solutions that actually get used - because they fit how your business works. 🔧 What I Build - AI agents and intelligent automation for business operations - Custom LLM solutions and ML-powered systems - Web platforms and SaaS products - Data systems and pipelines - Integrations connecting your existing tools 🤖 AI Approach Not every problem needs AI - and not every AI solution is just "automation." Sometimes the answer is a simple workflow where AI is just one step. Sometimes it's traditional software with no AI at all. And sometimes it's custom intelligent systems: agents that reason and act, ML models trained on your data, LLM integrations that go beyond chatbots. I build the right tool for the actual problem. 🏢 Industries Distribution, logistics, professional services, real estate, healthcare, e-commerce, marketing, education, manufacturing, financial services. ⚡ Tech Stack React, Next.js, TanStack Start, Node.js, TypeScript, AWS. AI: Claude, OpenAI, Gemini, custom LLM and ML integrations, etc. If you're tired of developers who just take orders, let's talk about what's actually frustrating your team.

👋 Hey, I'm Artem. Laravel Developer with 4+ years of experience building production web applications. 40+ projects, 50K+ users on a single platform, 99.9% uptime. As a Laravel developer I work with SaaS platforms, marketplaces, admin panels, REST APIs, CRM systems, and internal tools - from the ground up or existing codebase. Experienced Laravel developer who takes full ownership end-to-end. No hand-holding needed. As a PHP developer and backend developer I handle architecture, database design, API development, business logic, queues, caching, testing, deployment, and monitoring. Whether you need a Laravel developer to build an MVP fast or a Laravel developer to stabilize and scale what you already have - I've done both 40+ times. As a Laravel developer I've shipped: ✦ SaaS & multi-tenant platforms - subscription billing (Stripe, PayPal), RBAC, onboarding flows. 8+ SaaS products, 50K+ users, 12K+ monthly transactions. As a Laravel developer and SaaS developer I've taken products from idea to paying customers. ✦ Admin panels & dashboards - roles, permissions, data tables, analytics, charts, audit logs, CSV/PDF export. 15+ admin systems for logistics, healthcare, fintech, e-commerce. As a Laravel developer and web developer I build panels teams use daily. ✦ REST APIs & integrations - 20+ integrations delivered: Stripe, HubSpot, Twilio, SendGrid, ShipStation, Salesforce. As a Laravel developer I design documented, versioned APIs with average response time under 200ms. ✦ E-commerce & marketplaces - catalogs, cart, checkout, inventory, multi-vendor, Stripe Connect. $2M+ processed through systems I built as a Laravel developer. ✦ Migration & rescue - 3 monolith PHP codebases → modern Laravel 10/11, zero downtime. As a senior Laravel developer I cut technical debt 40-60% and ship stable architecture. Performance results from my Laravel developer projects: - API: 400ms → 120ms (6.5x faster) - DB queries: 340 → 45 per page (Eloquent + indexing) - Page load: 4.2s → 1.1s - Server costs: -40% (queues + Redis) - Deploy: 2h manual → 8 min CI/CD Stack: Laravel 5.x-13, PHP 8+, MySQL, PostgreSQL, Redis, Vue.js, Livewire, Inertia.js, Alpine.js, Tailwind CSS, AWS (EC2, S3, RDS, SQS), Docker, GitHub Actions, PHPUnit, Pest. As a Laravel developer I write clean, scalable, maintainable code. Production-ready. Ship fast, respond under 2 hours, 70% clients long-term. Proven track record as a Laravel developer and backend developer across 40+ projects. Need a Laravel developer for your project ? Send details via Upwork - I'll reply with a plan within 24 hours

👀 People decide fast. Let’s give them a reason to stay👋 I am Serhii, a UI UX Designer, web developer, and web designer with $900K+ earned and 24,802 hours on Upwork. As a UI UX designer, ai web developer, and modern website designer with 7+ years of experience, I have helped 500+ businesses across SaaS, Fintech, Healthcare, and E-commerce increase conversions and scale. 🏆 Why clients choose me: ✔️ 50% eCommerce sales as a web developer ecommerce, product designer, and ui ux designer saas figma specialist ✔️ 48% conversion improvement via UI UX designer and web design ux as a web designer and saas designer ✔️ 60% organic traffic via web design seo as a wordpress developer and graphic designer ✔️ 45% more leads as a modern website designer and product designer via web design ai ✔️ AI UX as an ai web developer, ui ux designer ai, and ui ux designer saas figma specialist 🎯 What I do: ❇️ UI UX Design & Product Design As a UI UX designer, saas designer, and graphic designer, I create interfaces grounded in web design ux research. My ui ux designer ai and ui ux designer saas figma work covers wireframing, Figma prototypes, and developer handoff. As a product designer and modern website designer, every web design decision is a business decision. My saas designer and graphic designer work has driven 300% more leads. As a ui ux designer saas figma expert, I deliver 5,000+ wireframes that go straight to production. Good web design ux thinking separates a great product designer from a good one. ❇️ Web Development & Front End Development As a web developer, front end developer, and full stack developer, I build web applications using React, Laravel, and Node.js. As a web developer figma specialist, I convert Figma to pixel-perfect code. As a web developer ecommerce expert, I build Shopify and WooCommerce stores. As an ai web developer, I integrate AI features. As a full stack developer, front end developer, and wordpress developer, I have delivered 500+ web apps — from wordpress developer theme builds to full-stack platforms. My wordpress developer and front end developer work is always web design seo optimized. As a full stack developer, I bring web design ai and front end developer discipline to every product. ❇️ Web Design & Website Design As a web designer, website designer, and modern website designer, I design across wordpress website design, wix web design, shopify website design, and custom website design — grounded in web design ux and web design ai. My web design ai approach integrates AI tools to accelerate iteration. As a graphic designer, product designer, and web designer, I deliver branding web design, law firm, luxury, and local business website design. Every website designer engagement is backed by web design seo and graphic designer quality. As a modern website designer and web design ai specialist, I combine product designer thinking with ai web developer capabilities to build websites that convert. ❇️ Figma & Web Developer Figma As a figma designer and web developer figma specialist, I handle figma to react, figma to webflow, figma to wordpress, and figma to shopify. My web developer figma workflow bridges UI UX designer vision and front end developer execution. As a ui ux designer saas figma specialist, every file is a scalable design system. Good web developer figma work eliminates back-and-forth. As an ai web developer and web developer figma expert, I build figma systems supporting ui ux designer ai workflows. ❇️ SaaS & AI Web Developer As a saas designer and ai web developer, I build SaaS platforms and AI-powered applications. My saas designer work covers ui ux dashboard systems. As a ui ux designer ai, ai web developer, and web design ai specialist, I integrate predictive AI. Every ui ux designer ai and ui ux designer saas figma engagement starts with a web design ux audit — as a modern website designer, full stack developer, and wordpress developer, I cover every layer. ❇️ eCommerce & Web Developer Ecommerce As a web developer ecommerce and full stack developer, I build Shopify and WooCommerce stores. My web developer ecommerce work reduces cart abandonment by 35%. Every web developer ecommerce project is optimized for web design seo. 📊 Results: ✅ 300% lead generation as a UI UX designer and web design specialist ✅ 50% page load reduction as a full stack developer and front end developer ✅ 48% conversion improvement through web design ux and web design ai ✅ 60% traffic via web design seo as a wordpress developer and web designer ✅ 35% less cart abandonment as a web developer ecommerce and graphic designer 🚀 Need a UI UX designer, web developer, web designer, front end developer, full stack developer, wordpress developer, saas designer, ui ux designer ai expert, modern website designer, graphic designer, product designer, web design ux consultant, ui ux designer saas figma specialist, or web developer figma partner? Let's connect! Last updated: 19.08