Software development · Web design · Platforms — Meerbusch

Custom software.
And it runs.

I build custom software, ordering systems, booking platforms and websites for businesses in Meerbusch, Düsseldorf, Neuss and Krefeld that need more than a website builder – and I keep running them afterwards. On the right you can see what is live right now. Not a claim – checked in real time.

Start a project See the work
own products
4
client projects
6
browser games
9
point of contact
1
eysec signal box · Meerbusch
  1. Fonavio AI phone fonavio.de checking …
  2. Billavio Office & invoicing billavio.de checking …
  3. Rotavio Staff rota rotavio.de checking …
  4. Dinervio Restaurant shops dinervio.de checking …
  5. 3vio Product family 3vio.de checking …
  6. Notna Spice Ordering treevio.de checking …
  7. BarberSino Online booking barbersino.de checking …
  8. Kilic Dachtechnik Website kilic-dachtechnik.de checking …
  9. NIALMA Website nialma.com checking …
  10. Rhein Verpackung Demo eysec.de/rhein-verpackung checking …
  11. Kilic Immobilien Website eysec.de/immo checking …
  12. GameStation 9 games eysec.de/GameStation checking …
Checking systems …

Before

Notes, calls, chaos.

Daily life in many small businesses.

The rebuild

Notes become tracks.

Every task gets its own fixed route.

The ride

Nine systems. One network.

Orders, phone, invoices, rotas, bookings – all real, all live. Click a monitor to look inside.

In operation

And it runs.

0 of 9 systems running.

Own software · the 3vio family & Dinervio

Before I build for you, I build for myself.

Three products of my own for businesses – phone, office and staff rota. With pricing, free trials and real customers. If you sell your own software, you cannot afford half measures. The same standard goes into every client project.

fonavio.de home page: every missed call costs revenue

AI phone agent

Fonavio

Avio answers every call – around the clock, friendly and without hold music. The request, contact details and call-back wish land as a task in the dashboard. Plus online booking for businesses.

  • Voice AI
  • Multi-tenant
  • Calendar
  • from €49 / month
fonavio.de
billavio.de home page: jobs, invoices, bookkeeping – one system

Office software for trades

Billavio

From quote to paid invoice in one system: progress invoices, reminders, e-invoicing, time tracking, stock and DATEV export – in the browser, on PC, tablet and phone.

  • ZUGFeRD / XRechnung
  • DATEV
  • AI assistant Bill
  • from €0
billavio.de
rotavio.de home page: rotas that sort themselves

Rota generator

Rotavio

Shifts, availability, holidays and rules become a full week. Rotavio checks minimum staffing and rest periods before the plan goes to the team – as a PDF or in the staff view.

  • Rule checks
  • Roles
  • PDF & approval
  • from €39 / month
rotavio.de
dinervio.de home page: your own ordering shop, no commission

Ordering software for restaurants

Dinervio

Every restaurant gets its own ordering shop – with its own name, design and domain. Pickup, delivery and table ordering by QR code; every order lands in the kitchen instantly. A fixed monthly price instead of commission.

  • 0 % commission
  • Stripe & PayPal
  • Kitchen display
  • from €79 / month
dinervio.de

Fonavio, Billavio and Rotavio under one roof: 3vio.de – the software family for businesses (German)

Work · built for clients

Every business gets its own idea.

No template, no website builder. Every project starts with the question of what makes this one business special – the tandoor for the restaurant, the survey for the roofer, calm for the senior care service.

Notna Spice on treevio.de: “Spice is a language.” inside an Indian arch
Notna Spice on mobile

Restaurant · Meerbusch-Osterath

Notna Spice

Website and ordering platform in one: order online, request a table, buy gift cards – and everything lands on the kitchen screen instantly. It grew into our product Dinervio.

  • Ordering
  • Stripe
  • Kitchen screen
  • Guest CRM
treevio.de
BarberSino: “Welcome to BarberSino” in huge letters
BarberSino on mobile

Barbershop · Meerbusch

BarberSino

Online booking with live availability: pick a service, your favourite barber or the earliest slot, done. Plus “My bookings” and a voice assistant.

  • Online booking
  • Choose your barber
  • Voice assistant
  • Fonavio
barbersino.de
Rhein Verpackung: “From carton to brand” with a printed box
Rhein Verpackung on mobile

Packaging · Demo

Rhein Verpackung

Upload your logo, spin the packaging in 3D, order. With shop, customer account and admin – in two languages.

  • 3D configurator
  • Shop
  • CRM
  • DE / EN
eysec.de/rhein-verpackung
Kilic Dachtechnik: home page with roof photo
Kilic Dachtechnik on mobile

Master roofers · Grevenbroich

Kilic Dachtechnik

The home page reads like a roof survey: trade terms appear as measuring points right on the roof.

  • One-pager
  • Gallery
  • Enquiries
  • fully self-hosted
kilic-dachtechnik.de
Kilic Immobilien: “Homes with a future” in front of a new building
Kilic Immobilien on mobile

Real estate · Rhein-Kreis Neuss

Kilic Immobilien

“Courtyard light”: a dark stage, and as you scroll the lights come on in the renovated houses.

  • Scroll staging
  • Vector logo
  • Interest list
eysec.de/immo
NIALMA: “Everyday companionship Meerbusch – it starts with a moment” above a sea of clouds
NIALMA on mobile

Senior companionship · Meerbusch

NIALMA

A journey above the clouds in four chapters – and at the end one button: call or send a WhatsApp.

  • Scroll journey
  • German / Turkish
  • Call & WhatsApp
nialma.com

Close-up · Notna Spice

What changes when a restaurant has its own software.

BeforeWith its own platform
Retyping orders from WhatsAppOrders appear on the kitchen screen instantly
One click adds a dish, nothing moreConfigurator: spice level, sides, extras
Reservations lost in chat historyTable requests with status link and cancel option
Vouchers sent as a messageGift cards with code and balance
Google sees “menu loading”All 142 dishes are in the HTML
No overview of regularsGuest CRM from orders and reservations

The same principle fits bakeries, cafés, delivery services, hair salons, workshops – anywhere notes, calls and chats still set the pace.

Workshop · GameStation

Nine browser games. No app store.

Games are the toughest test for software: 60 frames a second, four phones online at once, no stutter allowed. If I can keep that stable, I can keep your checkout stable. Every game runs in the browser and can be added to the home screen like an app (games in German).

All games at GameStation

Services

Software-house skills. Without the hotline.

Software development, web development and web design from one source – for trades, hospitality, care and SMEs around Düsseldorf. You talk to the person who builds it. No licence maze, no sales layer, no ticket system, no project that takes 18 months before you see anything.

Websites with an idea

Web design and development for a site that only fits your business – fast, ready for Google, all on your own server and legally clean.

e.g. Kilic Dachtechnik, NIALMA

Ordering & booking

Online orders, table requests, appointments, vouchers and payment – directly with you instead of a commission-taking platform.

e.g. Notna Spice, BarberSino

Software for your workflow

Custom software for your business: customer accounts, administration, roles and permissions, reports. Built around your working day, not the other way round.

e.g. Billavio, Rotavio

AI on the phone

An assistant that answers calls, sorts requests and prepares call-backs – set up for your services and your tone.

e.g. Fonavio

Shops & 3D configurators

Products customers put together themselves and view from every angle – with prices that are right from the first click.

e.g. Rhein Verpackung

Games, campaigns & print

Interactive campaigns, browser games with leaderboards and matching flyers and cards as print-ready PDFs.

e.g. GameStation

Process

From the first conversation to running in production.

  1. 1

    Conversation

    We talk about your business, not technology. What is annoying today, what should be easier tomorrow?

  2. 2

    Blueprint

    You get a clear plan with scope, price and timeline – and exactly one guiding idea for the design.

  3. 3

    Click-through

    Early on there is a version you can try on your phone. Changes are still cheap at that point.

  4. 4

    Polish

    Tested on large and small screens, with automated checks instead of hope.

  5. 5

    Operation

    Launch, hosting, updates. And if something sticks, you call me – not a hotline.

Emrah Yamak, founder of eysec
Emrah Yamak Developer · Cybersecurity · Data protection officer

About me

I know software from the side where it causes problems.

In support and second-level support I saw every day where software fails in real life: workflows nobody thought through, bugs nobody can reproduce, and security holes that only show up when it is too late.

So I trained as a systems administration and cybersecurity specialist and became a certified information security officer and data protection officer. Since then I build myself – as a software developer in Meerbusch: Fonavio, Billavio, Rotavio, Dinervio and the projects on this page. The “sec” in eysec stands for exactly that – security and privacy are built in from the start, not bolted on later. And if something does stick, you go straight to the person who finds the bug.

  1. SupportIT support & second-level supportAnalysing bugs, keeping systems running, understanding users
  2. 2023 – 2024Systems administration & cybersecurity specialistNetwork and server security, penetration testing, threat modelling
  3. 2024Information security & data protectionInformation security officer (ISO 27001), BSI baseline protection, data protection officer (IHK)
  4. todayeysec · own software & client projects3vio products, platforms, websites and games from Meerbusch
  • Information security officerISO 27001 · 2024
  • BSI baseline protection practitionerGerman BSI standard · 2024
  • Data protection officerIHK · 2024

Contact

Tell me what is getting in your way.

A few sentences are enough. I will get back to you within two working days with an honest assessment – even if the answer is that you do not need custom software at all.

Emrah Yamak · eysec Hochstr. 29, 40670 Meerbusch
kontakt@3vio.de

For businesses in Meerbusch, Düsseldorf, Neuss, Krefeld, Kaarst, Grevenbroich – and happily further away. German and English.

My second site · 3mmooo.de

eysec builds for businesses.
3mmooo.de is my workshop.

On 3mmooo.de I show what drives me as a developer and cybersecurity specialist – as an explorable 3D solar system. Every planet is a section:

  • EarthAbout me, career and certificates
  • UranusNetTools: subnet calculator, DNS and e-mail security check, port lexicon, Nmap builder
  • MarsRed teaming and the hacking challenge “Hack the Mars Base”
  • JupiterBlue teaming: tools to check links, files and accounts
  • SaturnGames – the GameStation and classics like Snake
Explore 3mmooo.de ↗