Hire the Best Amazon MWS Developers

I build custom automation systems and AI-powered tools for eCommerce sellers and agencies who want to stop doing things manually and start scaling. If you sell across multiple channels — Amazon, Walmart, eBay, Shopify — and you're losing hours to manual data entry, broken syncs, or outdated tools, I build the infrastructure that eliminates those problems permanently. 7+ years. 3,800+ hours on Upwork. 100% Job Success. Top Rated Plus. ⭐ What I Build 🔹 AI-Powered eCommerce Tools AI listing optimization & auto-generation (GPT/Claude integration) Intelligent repricing engines with ML-based demand signals Automated review analysis & competitor intelligence dashboards AI-driven inventory forecasting & restocking alerts Chatbots & support automation for seller storefronts 🔹 Amazon SP-API + Ads API Solutions Orders, Listings, Feeds, Reports Ads (Sponsored Products / Brands) automation Custom dashboards (React/Node) MWS → SP-API migration Custom order data → engraving/production automation 🔹 Walmart API Integrations Item setup, inventory sync Order processing & fulfillment automation Performance metrics dashboards Price syncing 🔹 eBay API Integrations Listing creation/update Order sync → ERP/Production systems Inventory management Multi-account dashboards 🔹 Shopify App Development Custom private apps Order workflows Fulfillment connectors Bulk product automation Integration with Amazon/Walmart/eBay systems 🚀 What Clients Get ✔ One unified workflow for all marketplaces ✔ Real-time inventory sync ✔ Automated order routing ✔ Clean, modern dashboards ✔ Elimination of repetitive tasks ✔ Better decision-making with accurate data ✔ Huge time and cost savings 🧩 Tech Stack React, Node.js, Express, MongoDB, PostgreSQL, Next.js, Python, AWS, Webhooks, OAuth Systems 🌟 Why Work With Me ✔ 7+ years building production-ready ecommerce systems ✔ Worked with US/Canada multi-channel sellers & agencies ✔ Deep API experience across Amazon, Walmart, eBay, Shopify ✔ Strong communication & clear deliverables ✔ Clean code, documentation, and reliable ongoing support 📩 Let’s Build Something Message me your pain point or idea — I'll propose the best solution and get it implemented fast.

I build custom Amazon seller software — SP-API dashboards, repricing engines, PPC tools, and Keepa-powered research platforms. 70+ tools shipped over 7+ years, including sellerbot, seller-shark and sellerwiz. I work with Amazon sellers, agencies and SaaS startups who need marketplace data turned into automated, scalable software — whether that's a full multi-tenant platform or a single API integration that has to be right. What I build Amazon Seller Dashboards — profit tracking, inventory monitoring and sales analytics on real-time SP-API data FBA/FBM Automation — repricing engines, inventory alerts, order management, multi-channel sync Amazon PPC Tools — Advertising API integration, keyword automation, bid optimization, campaign performance tracking Keepa API Integration — price history tracking, sales rank analysis, deal alerts, historical data dashboards Multi-tenant SaaS Platforms — white-label Amazon tools for agencies, Chrome extensions, and MWS-to-SP-API migrations Recent work A reporting dashboard handling SKUs with real-time SP-API sync A Keepa-powered product research platform now used by Amazon sellers Automated SP-API dashboards that cut a seller's manual reporting time Stack PHP (Laravel), Python (FastAPI/Flask) and Node.js on the backend. React and JavaScript on the frontend. MySQL, PostgreSQL and MongoDB. AWS Lambda, S3, RDS and EC2 for infrastructure. 100+ API integrations across e-commerce, payments, shipping and CRM. How I work I start by scoping the actual problem before quoting — if SP-API rate limits or report latency will constrain what you're asking for, you'll hear it upfront rather than three weeks in. You get documented code, a working staging environment, and a handover you can give to another developer without needing me. Send me your requirements and I'll come back within a few hours with a plan, a timeline and a fixed scope.

I am a Full Stack Developer with 7+ years of experience building scalable web applications, SaaS platforms, automation systems, and custom API-driven solutions. I specialize in combining strong backend architecture with intelligent automation to help businesses eliminate manual processes, sync data across platforms, and scale operations efficiently. With 87+ successful projects delivered globally (US, Canada, Europe), I focus on building systems that are reliable, scalable, and business-driven. 💻 Full Stack Development Expertise ✔ Custom Web Applications (Frontend + Backend) ✔ SaaS Platforms (Multi-tenant Architecture) ✔ E-commerce & Marketplace Systems ✔ ERP & Inventory Management Solutions ✔ Admin Dashboards & Reporting Systems ✔ Browser Extensions Tech Stack React.js | Next.js | Node.js | Express.js | MongoDB | REST APIs | Tailwind CSS | JavaScript (ES6+) | Cloud & VPS Deployment 🛒 Amazon SP-API & Marketplace Automation I build custom Amazon tools and automation systems including: ✔ Inventory & Order Sync ✔ FBA Reports Automation ✔ Sales & Performance Reporting ✔ Amazon to Google Sheets Automation ✔ Multi-Account Seller Systems ✔ Amazon Ads & Data Reporting Technologies: Amazon SP-API | Amazon MWS | Google Sheets API | Webhooks | Cron Jobs | Secure OAuth Integration ⚙️ Marketing & Workflow Automation I design intelligent workflow systems using: n8n | Make | Airtable | Slack Automation | Email Automation | CRM Integration Example Automations: • Amazon & Shopify revenue reports → Slack every morning • Lead Capture → CRM → Email Sequence • Google Ads & Meta Ads spend sync • Automated dashboards & reporting pipelines I don’t just connect tools — I design scalable automation architecture. 📊 Core Strengths • API Integration & System Architecture • Workflow Automation Design • Data Processing & Reporting Systems • Business Process Automation • Clean, Maintainable Code • Performance Optimization 🌍 Industries Worked With • E-commerce & Amazon Sellers • SaaS Startups • Marketing Agencies • Financial & ERP Systems • Inventory & Supply Chain Businesses ⭐ Why Clients Work With Me ✔ 7+ Years Experience ✔ 87+ Successful Projects ✔ Strong Backend + Automation Expertise ✔ Clean Architecture & Scalable Code ✔ On-Time Delivery ✔ Long-Term Technical Support I focus on building solutions that reduce manual work, improve visibility, and increase operational efficiency. 📩 Let’s Build & Automate If you need a reliable Full Stack Developer who understands APIs, automation, Amazon systems, and scalable architecture — let’s connect. Message me today to discuss your project. Full Stack Developer | Amazon SP-API | Marketing Automation | n8n Expert | Make Specialist | API Integration | SaaS Development | React.js Developer | Node.js Developer | Automation Expert | Google Sheets API | Slack Automation | E-commerce Development | Inventory Management System | Web Application Development | REST API Development | Workflow Automation | Marketplace API Integration | Custom Software Development

⭐ Top Rated Plus | 100% Job Success | $100K+ Earned | 175+ Projects Completed I help Amazon brands launch, optimize, and scale through data-driven PPC, SEO, catalog management, and Seller Central operations. Whether you're starting a new brand or growing an existing one, I focus on increasing visibility, improving conversions, and maximizing profitability. 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗼 ✅ Amazon PPC Management (Sponsored Products, Brands & Display) ✅ Amazon Listing Optimization & SEO ✅ Amazon Flat File & Bulk Uploads ✅ Parent-Child Variations & Catalog Management ✅ Amazon Seller Central Management ✅ Product Launch & Growth Strategy ✅ Account Health & Case Handling ✅ Inventory & Wholesale FBA Management 𝗧𝗼𝗼𝗹𝘀: Helium 10 • Jungle Scout • Keepa • Sellerboard • InventoryLab • Tactical Arbitrage • AMZScout • ScoutIQ • Wholesale Inspector 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? ✔ Top Rated Plus Freelancer ✔ 100% Job Success ✔ $100K+ Earned ✔ Fast Communication ✔ Reliable Delivery ✔ Long-Term Client Support I believe in solving problems at the root—not applying temporary fixes. Every project starts with understanding your business goals and delivering solutions that improve long-term performance. If you're looking for an Amazon expert who can manage your store, optimize listings, improve PPC performance, or streamline Seller Central operations, let's connect.

I help Amazon sellers reduce wasted ad spend and scale profitable growth. With 6+ years of dedicated Amazon PPC management, 9,000+ hours on Upwork, and a 100% Job Success Score, I've helped brands achieve results like $107K in sales at a 10x ROAS and consistent ACOS reductions of 15–20%. If your campaigns are bleeding budget or your ROAS isn't where it should be, I know exactly how to fix it. What I Do: ✔ Amazon PPC Strategy, Setup & Optimization (Sponsored Products, Brands, Display) ✔ Listing Optimization with A9/A10 SEO & Backend Keywords ✔ A+ Content / EBC Creation & Storefront Design ✔ Amazon FBA Full Account Management ✔ Seller Central Operations & Account Health ✔ Competitor Analysis & Market Research ✔ Amazon Inventory & Supply Chain Management ✔ Multi-Marketplace Management (US, UK, DE, JP, FR, IT) Why Work With Me: - Top Rated Plus Freelancer (Top 3% on Upwork) - 100% Job Success Score across 58+ completed jobs - Proven track record: $148M/month growth results - Fast response time (under 4 hours) - Transparent reporting and data-driven decisions If you're spending on Amazon ads and not hitting your ROAS target, let's talk. Message me today for a free campaign audit - I'll show you exactly where you're leaving money on the table.

I help Amazon sellers and software teams turn Seller Central chaos into systems that protect margin: Amazon SP-API and Amazon Ads API integrations, data pipelines, AI command centers, and repricing automation. Top Rated, 100% Job Success Most sellers I work with are profitable and still flying blind. Sales, fees, ad spend, and inventory live in five different exports, so decisions get made on gut feel and last month's spreadsheet. The cost of that is invisible until you fix it: overspent ad budgets, out of stocks on winners, hours of skilled people doing copy-paste work. WHAT YOU GET ✅ One set of numbers you can trust. Your sales, fees, advertising, and inventory data flow automatically into one place and actually reconcile. One client's team got back six hours per analyst, every single week. ✅ Ad spend that stops leaking. Automated wasted-spend audits, search term negation, and bid and budget rules on the Amazon Ads API. You keep the sales, cut the spend that never converts. ✅ The Buy Box, more often. I built RepriceLab, a repricer with paying subscribers competing across 12+ Amazon marketplaces. Same engine, tuned to your catalog and your floor prices. ✅ An AI command center for your store. Ask Claude a plain-English question like "what changed in our margin last week and why" and get a real answer pulled live from Seller Central, Amazon Ads, Google Ads, Shopify, and ShipStation. The biggest one I run has 130 tools behind it for a DTC brand. ✅ Nothing that puts your account at risk. I am an Amazon-approved third-party developer with PII approval. Access goes through Amazon's official authorization, no passwords, no scraping, and you can revoke it in one click. WHY SELLERS PICK ME OVER A CHEAPER DEV Because the expensive part is never the code. It is the month you lose when a fragile script silently stops syncing and your numbers drift. Everything I ship includes the boring parts that keep it alive: retries, monitoring, logs, and an audit trail. I run my own product in production, so when something breaks, I feel it before my clients do. THREE WAYS TO START 1. A 60-minute consultation ($149). Bring your messiest problem. You leave with a diagnosis and a written plan you can execute with me or without me. 2. A fixed-scope Project Catalog package. One clear deliverable, one price, one deadline. 3. A small hourly task first. See how I work before you commit to anything bigger. Tell me your marketplace regions, what you are trying to see or automate, and your current stack. You will get a specific answer, not a canned pitch. FOR YOUR DEVELOPERS If a technical person is evaluating this, here is the depth behind the bullets. Amazon SP-API: OAuth and LWA token management, orders, inventory, listings, catalog, reports, feeds, pricing, product fees, financial events, notifications via SQS and EventBridge, restricted data tokens, and PII-safe handling under Amazon's data protection policy. Private and public app registration, security questionnaires, and PII review readiness. Amazon Ads API: campaign management and reporting across Sponsored Products, Brands, and Display, search term reports, bid and budget operations, Marketing Stream ingestion, and multi-account, multi-profile pipelines. Data engineering: ingestion into BigQuery or PostgreSQL, scheduled and event-driven jobs, idempotent backfills, rate-limit-aware queueing, reconciliation checks, and alerting on drift or failed syncs. MCP servers: private Model Context Protocol servers for Claude and Codex with scoped tools, per-action guardrails, approval steps for writes, and full audit logging. Stack: Python, FastAPI, TypeScript, NestJS, PHP, Laravel, PostgreSQL, BigQuery, AWS, Google Cloud, Shopify, Mercado Libre. Based in Montevideo, Uruguay. US business hours. Native English and Spanish.