Feb 2026 – Mar 2026
Freelance / project portfolio
Seller-ERP Pro: Amazon Seller Financial ERP
Production-grade ERP for FBA/FBM with German SKR03, OSS VAT & ELSTER
Seller-ERP Pro unifies Amazon operations data with German double-entry bookkeeping and EU tax compliance. Built for multi-channel FBA/FBM sellers who need real profit visibility, automated fee posting, supplier invoice workflows, and accountant-ready exports — without spreadsheet chaos.
The Problem
Amazon sellers juggle SP-API orders, 21+ fee types, supplier invoices, Wise bank transfers, and German/EU tax rules across separate tools — with no single source of truth for true net profit or SKR03-compliant books.
The Solution
Delivered a modular Streamlit ERP on Turso with Amazon SP-API integration, TCO and P&L dashboards, 4-type inventory, P2P procurement, SKR03 general ledger, quarterly OSS reporting, and ELSTER XML plus DATEV CSV exports.
Key Features
TCO & Financial Dashboard
Real-time gross revenue, COGS, Amazon fees, expenses, and net profit with reimbursement tracking and trend charts.
Amazon SP-API Integration
Orders, settlements, FBA inventory, fees, returns, and VAT transactions synced from Seller Central.
Procurement & Expenses
Purchase orders, supplier invoices (including OCR workflows), Wise bank CSV import, and payment matching.
German & EU Compliance
SKR03 chart of accounts, GL journal, OSS VAT by EU country, Intrastat, ELSTER XML, and DATEV export.
Impact Metrics
16+
ERP modules
21
Amazon fee types
27
EU OSS countries
103
SKR03 accounts
Screenshots
TCO dashboard — revenue, COGS, Amazon fees, expenses, net profit, and operational KPIs
View
Amazon Sales — order grid with FBA/FBM fulfillment, fees, and geographic breakdown
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Financial Statements — Bilanz, cash flow, GuV (P&L), and operational reporting
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German Tax — VAT return (ELSTER), DATEV CSV export, and compliance workflows
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Accounting (GL/SKR03) — chart of accounts, journal entries, and balance sheet
ViewQuestions about this work?
Happy to discuss the approach, stack, or how it maps to a full-time role.
ContactGet in touch
Open to supply chain management/operations, logistics, business analytics & intelligence, operations research, and software development (websites & apps) roles internationally. I typically reply within 24–48 hours.