DE

Custom ERP solutions for SMEs

Software that follows your processes.
Not the other way around.

We build custom ERP solutions — efficient, user-centric and without a painfully long implementation — and with them the foundation for fully integrated AI solutions.

Live: a complete ERP solution for an SME in the timber industry — from optimised production scheduling to GoBD-compliant accounting.

Start a conversation See the ERP case
~4 weeks
Greenfield → production software
No subscription
One-time build, no per-seat license
AI-native
Google ADK · AWS Strands · Claude Agent SDK
Model-agnostic
Open-weights preference · swappable anytime
Full data sovereignty
Foundation for your own agents, apps & TabFM

Operating mode

Two senior architects, AI-assisted. Classical teams take months; we ship in weeks.

AI-native does not mean "we use ChatGPT for snippets". It means our entire delivery process is built around agentic development. We design architecture, data models, and security posture. AI implements, tests and integrates along that architecture. Reviewed, accountable, signed off by both of us.

  1. 01

    Data & process ingestion

    We collect your processes, forms, data flows and legacy systems upfront — and have them structured and analysed by our ingestion agents. On-site workshops focus on the genuinely open questions, not on foundational work. That saves days over classical requirements engineering and produces a sharper scope.

  2. 02

    Architecture & data model

    Domains, boundaries, integrations, security posture. A clean data model is the foundation of any software meant to still be maintainable in five years — and still running in ten.

  3. 03

    Agent-assisted build

    AI handles boilerplate, tests, integrations. We design, review and take responsibility. That way we deliver in weeks what classical teams take months for — with no quality compromise.

  4. 04

    Operate & evolve

    Docker Compose, GitHub Actions, Caddy with auto-TLS, health checks, staging pipeline, production deployments gated by git tag, defense-in-depth posture. Not a future vision — day-one standard. After that we grow with you.

Proof — heysuma is the standing proof: 36 domains, AI agents natively integrated, SEPA direct debit, multi-tenant — greenfield to v1.0 in 3 months by one developer, today replicable in ~4 weeks.

Why Kitun

We build business software. Not websites.

Multi-tenancy, role models, contracts, billing, AI agents, data migration — everything between a homepage and an ERP is exactly our territory.

01

Deep in your processes

We model business logic before a single line of code is written. Every feature exists because a real process demands it — not because a template suggested it.

02

Usable without training

We build only the functions your business actually needs — not the dozens of menu items of a standard ERP that only distract. User-centric, refined on the real user in feedback loops. The result: rollout without weeks of training.

03

Secure & compliant by design

GDPR-compliant architecture, data encryption at-rest, passwordless auth, CSRF protection, audit logging, multi-tenant isolation on every route. Not a checkbox — a design principle.

04

Data sovereignty as the AI foundation

Your own database, on-premise or in the EU — direct, full access to all data instead of a read-only API like cloud ERPs. The best basis for your own AI agents and methods like tabular foundation models. We handle operations and data protection.

05

Agent-assisted, not agent-driven

AI handles routine work. Two experienced software architects design, review, and stand behind every line that ships to production — delivering 4–6× classical team velocity, with no quality compromise.

06

No subscription, one project

A one-off project instead of a per-user licence. We handle maintenance and further development — predictable, without a per-seat price screw.

Current example module: Document Pipeline — PDF documents straight into your ERP

Digitally sovereign

100% EU-hosted — including AI inference.

While many providers ship business software through US clouds and route AI inference through OpenAI or Anthropic in the US, we build your software fully inside the EU — down to the inference layer. No Schrems II risk, no CLOUD Act, no third-country transfers. Our default, not a premium upgrade.

Proven in production by heysuma — the same baseline we build for you.

  • App & data: Hetzner (DE) · UpCloud (FI)

  • AI inference: Nebius Token Factory, hosted in the EU

  • Zero data retention: Prompts are not stored, no training on your data

  • GDPR by design: No third-country transfers, EU-law contracts

  • No US lock-in: Swappable models, no dependency on OpenAI or Anthropic

References

What we have built.

In production at clients and in our own products: custom ERP systems and platforms that we built, ran and verified ourselves.

Custom ERP · Reference

In production · being extended

Custom ERP for wood processing

End-to-end ERP for wood processing

From machine-level production scheduling through sales, purchasing and batch-level inventory to GoBD-compliant accounting — one system instead of isolated tools.

Modules
6 · end-to-end
Planning
Optimisation solver
Compliance
GoBD · DATEV · e-invoicing
Hosting
EU / on-premise
View case

Custom ERP · Reference

In production since 2026

Production planning

Optimised weekly planning & reliable delivery dates

An optimisation solver plans six processing lines, calculates achievable delivery dates (capable-to-promise) and docks cleanly onto Sage Classic Line — instead of rip-and-replace.

Lines
6
Setup time
~10% batched
On-time delivery
~90% at bottleneck
Bridge
Sage · 5-min export
View case

Flagship platform

Live · v1.0

heysuma

Studio management SaaS for EMS fitness studios

Multi-tenant SaaS platform with 36 domains, 5 AI agents, SEPA direct debit and passwordless auth. Built in 3 months by one developer — today replicable in ~4 weeks with our AI-native workflow.

Domains
36
Launch
v1.0 · May 2026
Core stack
FastAPI · Vue 3 · PostgreSQL · Strands Agents
Hosting
Hetzner DE · GDPR
View case study Live: heysuma.de

Tooling

In use · Apr–May 2026

lead-gen-agent

Multi-agent CLI for B2B prospecting

Four Google ADK agents find, filter, enrich and write qualified EMS-studio leads into a self-hosted Twenty CRM. Reentrant, idempotent, fail-soft by design.

Agents
4 · Find/Filter/Enrich/Write
Framework
Google ADK · Gemini
CRM
Twenty · self-hosted
Infrastructure
Hetzner CX22
View case study

Who we build for

One architecture. Many industries.

heysuma covers the processes of a service company — contracts, billing, customer portal, sales pipeline, multi-location. The same building blocks translate to any mid-sized business that deals with customers, orders and appointments.

Manufacturing & production

Order processing, quoting and invoicing, customer portals for project status, resource and staff scheduling. A replacement for historically grown ERP systems and Access-based islands.

Solution: Document Pipeline

Trades & services

Scheduling and dispatch, resources (people, vehicles, equipment), SEPA direct debit, customer communication, invoicing. One system that works on a tablet in the field just as well as on the desktop.

Health & care

GDPR-compliant patient data with Fernet at-rest encryption and an audit log. Contract models, appointments with resources, billing with statutory/private differentiation.

B2B & consulting

Sales pipeline with Kanban, lead capture via embeddable widgets, quotes, project status for customers, invoicing. From first lead to project close.

Education & memberships

Course and member management, booking widgets, subscription models with auto-renewal, member portal as PWA. Multi-location and franchise out-of-the-box.

Franchises & groups

Multi-tenant architecture proven in production: central reporting, decentralised execution, role-based access per location. Scales to any number of branches.

Our toolkit

Production-ready. Without experiments.

Proven, modern, maintainable. We stay close to the state-of-the-art — but we don't put beta technology into your systems.

Backend

  • Python
  • FastAPI async
  • PostgreSQL
  • SQLAlchemy 2.0
  • Alembic
  • Celery · Redis
  • Pydantic 2

Frontend

  • Vue 3
  • TypeScript
  • Pinia
  • Vue Router
  • Tailwind CSS
  • Radix Vue
  • Vite
  • Vite PWA · Workbox

Infrastructure

  • Docker · Compose
  • GitHub Actions
  • GHCR
  • Hetzner (DE)
  • UpCloud (FI)
  • Passkeys · Magic-Link

AI

  • Strands Agents SDK
  • Google ADK
  • Claude Agent SDK
  • Nebius Token Factory (EU)
  • Zero data retention

The team

The same team. The next chapter.

Robin Maier and David Schumann founded Mindance together in 2017. With kitun, Robin leads the next chapter — an AI-native software studio for mid-market companies — with David at his side as technical advisor and a tight network of seasoned specialists.

Robin Maier

Robin Maier

Founder & software architect

Ten years in software teams — from corporate SAP at a southern-German wood manufacturer to startup greenfields. Focus on product architecture, data modelling and agentic development.

Architecture Agent orchestration DevEx
David Schumann

David Schumann

Technical advisor

Robin's co-founder and CTO at Mindance, now a Senior Distributed Systems Engineer at Snowflake. Advises kitun on backend architecture that scales and stays maintainable — data architecture, security, async processing and production operations.

Data architecture Security Backend
Meet the full team

Conversation

Let's talk.

If you are thinking about custom business software — an ERP replacement, a new customer portal, process digitalisation — drop us a line. No sales rep, no funnel. Reply within 24 hours.

Discuss your project