LEHSYS – Arbeitsumgebung der App-Factory
LEHSYS Solutions

LEHSYS Solutions – tailored solutions for SMEs, freelancers and public authorities, as SaaS or on-premise. Solutions,
 tailored to your requirements.

LEHSYS Solutions builds exactly the solution your processes need — for SMEs, freelancers and public authorities, as hosted SaaS or on-premise inside your own network.

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Core idea

Solutions tailored to your requirements

Software should map your processes — not the other way around. LEHSYS Solutions builds exactly the solution your workflow needs and runs it the way your organization requires: as hosted SaaS or on-premise inside your own network.

What off-the-shelf software costs

  • Standard software covers around 80 % of requirements — the decisive 20 % that make your business distinctive stay uncovered.
  • Around 43 % of all software licenses are never used: you pay for the full feature set and need a fraction of it.
  • Between 30 and 40 % of license spend goes right back into customizations, integrations and workarounds.
  • Processes get bent to fit the software — with media breaks, Excel detours and dwindling acceptance in the team.

What a tailored solution delivers

  • Your workflow is mapped exactly — no workarounds, no detours through Excel or paper.
  • Up to 240 hours per employee per year can be reclaimed once repetitive tasks are automated.
  • You pay for the scope you actually use — no licenses for modules nobody opens.
  • Your own isolated instance: your data never sits alongside another customer’s.

Numbers behind the decision

80 % covered by standard software — the rest stays your problem metafinanz
43 % of all software licenses are never used Zylo SaaS Management Index 2026
240 h per employee per year reclaimable through automation Smartsheet
89 % of companies consider themselves dependent on imported digital technology Bitkom 2025

Sources: metafinanz (custom software for SMEs), Zylo SaaS Management Index 2026, Gartner (ERP customization cost), Smartsheet (automation of repetitive tasks), Bitkom “Digital Sovereignty 2025”. As of August 2026.

Deployment: your call

The same solution, two places to run it — choose by compliance, effort and data sovereignty.

SaaS (hosted)

We run your own isolated instance: ready to go immediately, updates and backups included, predictable monthly cost.

On-premise

Runs inside your own network on your hardware — full data sovereignty, your own database, no cloud dependency.

What we need for an accurate quote

The more concretely these points are answered, the more reliable the quote becomes. None of it is required for a first conversation — it is simply the list we would walk through together anyway.

Process & scope

  • How does the process run today — including Excel, paper and email detours?
  • Where exactly does it hurt: duplicate entry, search time, error sources, waiting times?
  • How many people work with it, in which roles and with which permissions?
  • What data volume do you expect — today and in three years?
  • Is a multilingual interface required?

Technology & integration

  • Which existing systems need to be connected (ERP, accounting, CRM, email, calendar)?
  • Is there legacy data to migrate — and in what format?
  • Which exports, reports or interfaces do third parties need from you?
  • Is the solution used on mobile or offline?
  • Is there an existing login/SSO it should connect to?

Operations & compliance

  • SaaS or on-premise — and if hosted: which hosting location is permitted?
  • Which data protection, industry or regulatory requirements apply to you?
  • Which retention periods and backup requirements must be met?
  • Is two-factor authentication mandatory?
  • What availability do you expect, and who is the contact in case of an incident?

Framework

  • Is there a deadline or statutory date the project hinges on?
  • What budget is available — one-off and recurring?
  • Who decides, and who is the subject-matter contact during the project?
  • Which documents already exist: forms, templates, process sketches, screenshots?
  • What must the solution do on day one, and what can follow later?
Discuss your requirements
Brand core

SaaS solutions for small user counts

LEHSYS Solutions builds tailored, hosted business software for customers underserved by standard SaaS: small and medium enterprises, freelancers, and public authorities with specific needs and a manageable user base.

Compact market analysis

SMEs

Processes too specific for standard SaaS and too small for custom development — exactly the gap LEHSYS Solutions fills.

Freelancers

Time tracking, billing and cashflow planning without enterprise overhead — lean, ready to use, fairly priced.

Public authorities

Niche requirements with small user counts, barely served by the market — built data-sparingly and without vendor lock-in.

3 target segments in focus
6 automated security checks per release
1 dedicated instance per customer — no shared data stores
24/7 automated threat detection at the edge

Security as a first principle

Security is not an afterthought at LEHSYS Solutions — it is verified in our own production repositories with every release.

  • Automatic TLS/HTTPS with HSTS — no unencrypted connections
  • Your own isolated instance per customer — no third-party data in your environment
  • Modern, memory-hard password hashing and token architecture
  • Automated security pipeline before every deployment (static analysis, dependency audit, secret scanning)
  • Web application firewall and behavior-based threat detection at the edge
  • Encrypted, off-server backups with keys never stored on the production server

More solutions

FundingFlowControl On request
Grant management

From application to proof of use — with a portal for applicants and a back office for case workers.

XBillManager On request
Invoice management & e-invoicing

Invoices with XRechnung/ZUGFeRD and Leitweg-ID, multiple organisations and roles.

Technology

What we build with

One house stack for every product — tested, secure and portable between SaaS and on-premise.

In focus

SAP BTP

Our solutions also run on SAP Business Technology Platform — right next to your SAP system, with single sign-on and a Fiori interface.

  • SAP CAP (Node.js) · HANA Cloud
  • SAPUI5 / Fiori · SAP Build Work Zone
  • XSUAA / IAS single sign-on
  • Cloud Foundry · MTA deployment

Backend

  • Go 1.27
  • Python 3.14 · FastAPI
  • PostgreSQL 16
  • Hexagonal architecture

Frontend

  • Vue 3 · TypeScript
  • Tailwind CSS 4
  • PWA · offline-capable
  • Accessibility-tested (axe)

Security

  • argon2id · TOTP 2FA
  • Roles & tenant isolation
  • WAF (OWASP CRS) · CrowdSec
  • Encrypted receipts (AES-256)

Operations

  • Docker, read-only & rootless
  • SaaS or on-premise
  • SBOM · signed images
  • Security scan before every release

3,300+ automated backend tests · end-to-end and accessibility tests

Interested in a solution tailored to your business?

Tell me briefly what you need — I will get back to you with next steps for a custom quote.

Send message

LEHSYS Solutions

Address Karen-Fredersdorf-Str. 10
39120 Magdeburg
Email
Feel free to contact us directly.