KSeF deadline without ERP migration

If this is you, keep reading.

The problem

KSeF compliance is mandatory and the deadline isn't moving. Your ERP vendor wants 6 months and a six-figure migration.

You don't want to rip out your ERP. You want a bridge: invoices in, invoices out, FA(3) XML compliant, archives keepers happy.

The off-the-shelf KSeF integrators want a per-document fee that grows with volume. Cost predictability becomes impossible.

Your in-house IT can't justify 4 months learning the Ministry of Finance API just for one project.

What we'd build

1 KSeF outbound + inbound integration sitting next to your existing ERP — no migration
2 FA(3) XML validation, retry logic, status reconciliation, full audit trail
3 Bulk import of historical invoices for archival compliance
4 Predictable monthly — no per-document surprise fees
5 PostgreSQL data layer (battle-tested by Spotify, Reddit) for invoice archive
6 Your code, your data, no vendor lock-in if you change ERPs later

How long it takes

4–8 weeks

Test the concept on one slice of the problem. Fixed scope. Fixed price. Working software at week 1.

3–6 months

Production-ready system covering the full scope. Iterative. Weekly demos. Your repo from day 1.

12 months+

Continuous evolution. New features. Predictable monthly. No surprise license audits.

Investment

Built for SMEs, priced for SMEs.

Free 30-min audit. Zero commitment. We'll give you actual numbers.

Outcome

KSeF-compliant before deadline, ERP untouched

Hundreds of hours of manual reconciliation eliminated

Cost structure predictable — no per-document growth tax

Enterprise capabilities. SME pricing.