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EU Digital Signature & EUDI integration infrastructure

Digitally signed documents.
eIDAS-ready infrastructure.

We design and implement PAdES-compatible digital signature systems with audit trails, verification endpoints, and enterprise-grade cost control.

Book EUDI integration sprint View packages

Why this matters

You don't need “PDF signing” as a gimmick.
You need a trust layer for documents.

Packages & pricing

Scoped by diligence depth: proof → production layer → full trust infrastructure.

Proof of concept

Signature Starter

€5,000 – €12,000

Timeline: 2–4 weeks

What's included

  • PAdES signing flow (via trust provider)
  • Worker orchestration (upload → sign → result)
  • Baseline verify endpoint
  • Document hash + timestamp storage
  • 1–2 production-shaped signature use cases

Outcome

Document → Signed → Verified

Best for

MVPs · investor demos · fast technical proof.

Production layer

SaaS Integration

€20,000 – €45,000

Timeline: 4–8 weeks

Signature infrastructure

  • PAdES (B-B / B-T level posture)
  • Visible signature stamp where needed
  • EU QTSP / trust provider wiring

SaaS integration

  • API endpoints & product hooks
  • Dashboard integration
  • User-level signing & entitlements posture

Audit layer

  • Structured logs tied to artefacts
  • Document hash lineage
  • Verification metadata surfaced to ops

Billing control

  • Stripe usage-based billing patterns
  • Per-user / per-plan quotas
  • Worker-rate limits

Outcome

Signature → SaaS → Billing → Audit → Control

Enterprise trust

Enterprise Trust Infrastructure

€50,000 – €120,000+

Timeline: 8–16 weeks

Full signature system

  • Multi-document workflows · batch posture
  • Approval chains coordinated with audit model

Compliance layer

  • eIDAS-ready architecture documentation
  • Sub-processor & data-flow mapping hooks
  • Audit-ready persistence model

Verification layer

  • Public verify page flows (merchant-grade proof UX, Stripe-class clarity)
  • Verification API · partner-facing trust links

Long-term validation (LTV)

  • OCSP / CRL embedding strategy
  • Timestamping evidence
  • Durable evidence storage rails

Control & monitoring

  • Admin surfaces for signing control
  • System health instrumentation · alerting posture

Cost protection

  • Hard limits at the Worker edge
  • Stripe metering alignment
  • Fail-safe throttling

Outcome

Enterprise-grade digital trust system

Not just signing. Infrastructure.

We embed document trust mechanics your enterprise buyers actually inspect — not lipstick on a blob store.

We don't implement PDF signing.
We build document trust infrastructure.

How it works

User uploads document
→ Worker validates request
→ Signing provider signs (PAdES)
→ Metadata stored
→ Verification endpoint created
→ Audit log recorded
→ Billing & limits applied

Cost control

Signing traffic is hostile to unmanaged bills — budgets without throttle are liabilities.

Why most systems fail

  • Unmetered signing explodes invoices
  • No rate limiting → surprise load
  • No usage tracking tied to entitlement

What we implement

  • Usage-based billing posture (Stripe)
  • Per-user limits & per-plan quotas
  • Worker-level throttling
  • Fail-safe stop conditions
Your system cannot go bankrupt from usage

Rate limits

Edges enforce caps before spikes hit trust providers.

Stripe metering

Entitlements reconcile with Stripe truth — readable for ops and finance.

Fail-safe

Emergency throttles engineered before anomalies burn budget.

Compliance positioning

Architecture language procurement teams recognise — without over-claiming.

What we engineer

  • eIDAS-ready control planes & data flows
  • PAdES-compatible signing paths via accredited providers
  • Audit-capable persistence models

What we avoid claiming

We do not promise “qualified signature by default” or blanket legal outcomes. Qualification hinges on certificate class, issuer status against EU Trusted Lists, and your validation context — tightened with counsel and your QTSP picks.

Enterprise use cases

Proposal-ready narrative

Paste into procurement decks — always pair with jurisdiction-specific counsel for final qualification wording.

I implement EU-compliant digital signature infrastructure inside SaaS systems.

This includes:
– PAdES-compatible PDF signatures
– eIDAS-ready architecture
– Qualified EU signature provider integrations
– Long-term validation (OCSP / CRL)
– Audit trails and verification endpoints

I also design cost-safe systems using Cloudflare Workers and Stripe, so signing operations are controlled, metered, and financially safe.

Get a structured ROI breakdown

Same browser session can carry numbers from the ROI calculator.

EUDI demo catalogue

MP4 explainers illustrating attribute-provider concepts, identity framing, GDPR engineering posture, and a technical integration walk-through. Hosted on contractbot.eu for transparent delivery — illustrative content, not a substitute for jurisdictional counsel.

Demonstration only

Attribute Provider Concept

How attribute-provider logic can structure verified claims, relying-party trust and document execution readiness.

Open MP4
Demonstration only

Digital Identity Framing

How EUDI-style identity flows can support signer context, wallet-based trust and evidence layers.

Open MP4
Demonstration only

GDPR Engineering Posture

How privacy-by-design, minimisation, auditability and data-flow boundaries are reflected in the EUDI demo architecture.

Open MP4
Demonstration only

Technical Integration Walk-through

A practical overview of how the EUDI signature / verification demo can connect front-end, provider chain and verification evidence.

Open MP4

Demonstrations only — actual behaviour depends on your configuration, relying-party posture, and trust-provider chain. These explainers are illustrative and do not replace jurisdiction-specific legal, trust-service or compliance advice.

FAQ

Do you provide certificates?

No — certificates come from EU trust providers. We integrate orchestration around them.

Is this legally valid?

The system is built to be compliant-ready — controls, traces, verification surfaces. Final legal validity depends on the provider chain, certificate class, and your usage context (always pair with counsel).

Can this integrate with our system?

Yes — API-first posture for SaaS, ERP, and internal tooling (not orphaned upload-only flows).

Can we control costs?

Yes — billing hooks and Workers-level quotas are scoped as first-class rails, not an afterthought.

Book EUDI Integration Sprint

Architecture-first engagement before anyone commits heavyweight implementation euros.

  • ✔ Map your signing workflows
  • ✔ Surface compliance-sensitive gaps vs eIDAS/PAdES realities
  • ✔ Design orchestration architecture (Workers + Stripe + QTSP posture)
  • ✔ Estimate phased implementation brackets
Book sprint

ROI calculator · Verify reports · Consulting home

Qualitative claims about QES tiers or accreditation are intentionally avoided here — pairing with your QTSP roadmap is where statements harden.