Mladen Saric

I am an experienced developer and digital entrepreneur with a focus on customized business solutions for the DACH market.

My strength lies in combining technical implementation with a deep understanding of commercial processes — from invoicing to EU compliance documentation.

CORE COMPETENCIES:

🛒 E-commerce & Web Development

• Shopify (Liquid, Theme Development, B2B, Apps)

• OpenCart Development & Customization

• HTML / CSS / JavaScript

• Multilingual Shops for DACH Markets

💻 Software Development

• Python (Streamlit, NiceGUI, ReportLab, SQLite)

• Custom ERP & CRM Systems

• PDF Generation (Invoices, Reminders, Reports)

• SEPA QR Code Integration

• Automated Commission Systems

📋 DACH Compliance & Legal

• GoBD-compliant Invoicing

• GPSR & PPWR Compliance Management

• Customs Tariff Number (HS Code) Management

• EU Volume Reporting (LUCID, ARA, Citeo, CONAI)

• DATEV-compatible Export

🚀 OWN SOFTWARE PRODUCTS:

I develop and market two proprietary business solutions:

① Systemic ERP v2.0

Complete accounting for SMEs in the DACH region:

Quote → Invoice → Reminder → Collections

• Multi-Status PDF (Payment Reminder, Reminder 1/2, Collections)

• SEPA QR Code on all documents

• Automatic deadline calculation & reminder fees

• GoBD-compliant archiving

• Multi-currency & EU tax logic

② Systemic Standards — Compliance Manager

Management software for GPSR & PPWR compliance:

• Digital Customs Vault (HS Codes, Certificates, Documents)

• GPSR Product Data Sheets & Dossier PDF

• PPWR Packaging Data & EU Volume Reporting

• Partners & Associates with automatic commission settlement

• Customer Master Data Sheet PDF

• Document Safe per customer/project

✅APPROACH:

✔ Clean, maintainable code — no unnecessary complexity

✔ Direct communication, short feedback loops

✔ Delivery with documentation

✔ Available in German, English, and BKS

✔ Experience with small and medium-sized businesses