Technology & R&D

A proprietary architecture to automate with AI, under control.

MIMO, Taxdity and Atalaya are built on the same engineering approach, developed entirely by Kalkar. Its core principle is simple: AI proposes, code and people decide. That is how we combine the flexibility of language models with the predictability a real business requires.

Architecture

How the platform is built.

Proprietary Python backend on PostgreSQL, containerised services on European cloud infrastructure, a cross-platform mobile app and state-of-the-art language, speech and vision models.

  1. Channels

    WhatsApp, web chat, email, real-time phone voice and mobile app.

  2. AI agents

    Language, speech and vision models that interpret messages, documents and events.

  3. Rules and decision engine

    Deterministic code with business rules, confidence thresholds, approvals and a log of every decision.

  4. Product modules

    Property operations, revenue management, finance, tax, payroll, documents and security operations.

  5. Integrations

    PMS, open banking, payment gateways, IoT, government services and security tools such as Microsoft Sentinel, Defender, GreyMatter or VirusTotal.

Ecosystem

Connected to the tools you already use.

Decoupled connectors for every product: adding a new source never means rebuilding anything. These are the integrations we work with today.

Atalaya· Cybersecurity

  • Microsoft Sentinel
  • Microsoft Defender
  • ReliaQuest GreyMatter
  • VirusTotal
  • Qualys VMDR
  • Hadrian
  • KnowBe4
  • Snow Atlas
  • Microsoft Entra ID
  • Microsoft Azure
  • Jira
  • ServiceNow
  • Corporate CMDBs
  • Pentera (on the roadmap)

Taxdity· Finance and tax

  • Multi-bank open banking
  • Stripe
  • SumUp
  • Peppol UBL
  • VERI*FACTU
  • Spanish Tax Agency mailboxes
  • Spanish Social Security mailboxes

MIMO· Hospitality

  • PMS and sales channels
  • WhatsApp Business
  • Nuki
  • Stripe
  • SumUp
  • Home Assistant
  • Shelly
  • Netatmo
  • tado
  • ESPHome

Messaging and outputs

  • Email
  • Real-time phone voice
  • Slack
  • Webhooks
  • REST API
  • PDF
  • JSON

The brands mentioned belong to their respective holders. Availability of each integration depends on the product, version and deployment.

Technical principles

What makes our technology different.

Increasingly deterministic AI

Approved answers become fixed answers and history becomes a reviewed knowledge base. No model retraining on customer data.

Multi-tenant and scalable

Multi-client, multi-location architecture with per-client permissions, property groups and independent containerised services.

Proprietary IoT

Every property has its own IoT network, managed remotely through encrypted tunnels, with integrated cameras, locks and sensors.

Security by design

Managed authentication, web application firewall, service isolation, antivirus file scanning and least privilege.

Privacy by design (GDPR)

EU infrastructure, data minimisation, noise measured without recording audio and camera privacy controls.

Multilingual

Guest experience in six languages and management dashboards in several languages, ready to operate across countries.

AI cost under control

AI spending caps per platform and per feature, and the right model for each task.

Traceability

Every figure and every action is linked to its source. Anything missing is flagged; nothing is invented.

R&D

Ongoing research and development lines.

Kalkar focuses on building proprietary technology. These are the lines we are working on:

  1. Deterministic AI agents

    Methods for a conversational agent to turn what it learns into verifiable rules and answers, reducing errors and cost per interaction.

  2. Financial document understanding

    AI reading of invoices and documents that improves with professionals’ corrections and reconciles automatically with bank transactions.

  3. Booking-aware physical security

    Correlating IoT events with booking status to detect anomalies, and new camera-free presence detection techniques.

  4. Supervised autonomous revenue management

    Pricing engines that act on their own within safe limits, with human approval and kill switches.

  5. AI agents for security operations

    Orchestrating specialised agents that investigate, correlate and propose responses with source transparency, and technically validating that a vulnerability is really fixed.

  6. Automated multi-country tax compliance

    Modelling tax and employment obligations across countries. Available for Spain and Belgium, with a model that extends to other countries.

Want to see the technology in depth?

We present the architecture, roadmap and R&D lines to investors, partners and public bodies.

Request a demo