Legacy-System API-Integrationsbrücke (SAP, DATEV, Altsysteme)

Entwicklung robuster Middleware und API-Konnektoren zur fehlerfreien Synchronisation von Altsystemen (SAP, AS400, lokale SQL-Datenbanken) mit modernen Cloud-Tools.

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Leistungsumfang, Projektbeginn und Abnahmekriterien werden im individuellen Angebot vereinbart.

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SERVICE SPECIFICATION · IGN-S07

Legacy System API Integration Bridge (SAP, DATEV, Lexware)

Tier: Specialized Architecture & Advisory Solution (€8,500) · Implementation: 12 Business Days

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1. Scope of Deliverables

✓ Bi-directional API bridge between legacy accounting/ERP systems and modern automation workflows
✓ Automated master data and invoice export/import routines (e.g. DATEV ASCII / XML format)
✓ Error-handling queue with automated retry logic and dead-letter notification
✓ Interface technical specification and security documentation

2. Milestones & Sign-Off

Phase 1 — Data Mapping & Interface Development (50%)Field transformation rules and authentication setup.

Phase 2 — Reconciliation Testing & Sign-Off (50%)Parallel run verification with historical transaction batches.

3. Prerequisites & Infrastructure

Client Prerequisites: API credentials / interface documentation for legacy system, test environment access.

Infrastructure & Compliance: Hosted on dedicated German cloud infrastructure (Hetzner ISO 27001). Designed to support traceable operations and GoBD-aligned digital records (§ 238, § 257 HGB). Technical scoping supports public grant co-funding applications (e.g. Hamburg Digital Check, up to 50% of eligible advisory costs).