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Ella H.

Ella H.

Custom Ecommerce Platform developer| ERP | WMS | CRM

✅ 20+ years of enterprise engineering expertise ✅ 100% Traceability & 0% Double-Allocation Inventory Ecosystems Manual tracking, spreadsheet discrepancies, and fragmented multi-channel orders drain up to 30–40% of operational efficiency, creating massive supply chain bottlenecks. We help mid-market manufacturers, B2B wholesale distributors, and global e-commerce brands eliminate siloed workflows by architecting unified digital operating systems. Specializing in high-impact operations automation, we design and build bespoke, multi-tenant cloud SaaS platforms, advanced Warehouse Management Systems (WMS), and robust Enterprise Resource Planning (ERP) tools that safely handle heavy operational scale without adding headcount. ⚙️ What We Do Best & Our Impact Metrics: Custom ERP & WMS Platform Development: Engineering complete multi-role web architectures and secure mobile apps from scratch. Result: Replaced systems like Floorzap and legacy tools to drive 10x higher processing throughput for operations teams. Multi-Channel & Multi-Tenant Integrations: Developing deep, automated sync pipelines between core databases and external environments. Result: Seamlessly managed over 400+ active SKUs via real-time Shopify Plus, Amazon SP-API, Faire, and QuickBooks Online financial networks. Advanced Inventory Tracking & FEFO/FIFO Logic: Implementing granular lot tracking, expiration monitoring, serial numbers, and physical bin/shelf location mapping. Result: Reduced manual data capture errors by 45% and established total stock compliance in regulated spaces. Automated Fulfillment & Shipping Workflows: Custom engineering sequential label printing, weight scale/dimensioner data capture, and AI exception-tracking. Result: Automated real-time CSV extraction directly to warehouse APIs, reducing administrative overhead by ~50%. Hardware & Scan Integration Engine: Building native and hybrid mobile applications (React Native) utilizing DataWedge APIs for rugged Zebra PDA devices and real-time UPC barcode workflows. Result: Boosted on-the-floor sorting and dispatch validation speeds by 150%. 🔄 Our Proven Operational Process: Scope Discovery & Architecture Mapping: We analyze your existing workflows (including reviewing complex 20+ page specification documents, legacy DB architectures, and internal spreadsheets) to build an ironclad technical roadmap detailing milestones, data entity diagrams, and risk assessments. Custom Execution & Clean Engineering: Building on top of secure, high-performance tech stacks (Next.js, Node.js, Supabase, PostgreSQL). We build scalable database schemas featuring Row-Level Security (RLS) for complete multi-tenant data isolation and continuous server health logging. Deployment, QA & Infrastructure Scale: We ship code iteratively using strict GitHub PR reviews and automated Docker CI/CD pipelines to AWS, Vercel, or custom cloud servers, completing full functional validation inside sandboxed testing loops before turning systems live. 🛠️ Domain & Technology Expertise (Proven Results): Platform & Architecture: Custom ERP, Multi-Tenant WMS SaaS, B2B Work Order Engines, Client Portals against Floor Plans. Automations & Workflows: n8n, Zapier, Webhooks, Multi-Carrier API Integrations (ShipStation, UPS, FedEx, USPS), OpenClaw AI frameworks, ShipStation API Integration Data & Logistics Core: PostgreSQL, Supabase RLS, Secure OAuth/M365 Integrations, Automated PDF Quotation Engines. Frontend & Native Mobile: Next.js 14 (App Router), React, Tailwind CSS, Shadcn/ui, React Native (iOS & Android). Whether you need to scale your operations to thousands of monthly movements, replace a legacy system without disrupting live trade, or deploy a commercial WMS SaaS platform to market, we turn messy logistics into clean code.

🇺🇦Kropyvnytskyi, Ukraine$40/hr100% JSS4.94 (10)Since Jun 2019
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Earnings and projects

MRR
$0

Last 6 months ÷ 6

World#7,768 / 412k
🇺🇦Country#664 / 14.3k
Revenue, last 30 days
$0
Total earnings
$299k

Billed in all: $302k

World#7,768 / 412k
🇺🇦Country#664 / 14.3k
Per project
$11k
Projects, last 6 months
0
World#209,857 / 412k
🇺🇦Country#7,324 / 14.3k
Projects in all
27

Across 31 contracts

16% fixed84% hourly
World#106,303 / 412k
🇺🇦Country#4,627 / 14.3k

Earnings, last 30 days

$302kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$295k$300k$305k$310kOct 9Oct 24Nov 8

Skills