Manuel Kübler - Senior Full-Stack Developer & IT Trainer

Q: Where is Manuel based?

Manuel is based in Iserlohn, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Manuel speak?

Manuel speaks the following languages: German (Native), English (Intermediate) .

Q: How many years of experience does Manuel have?

Manuel has at least 14 years of experience. During this time, Manuel has worked in at least 8 different roles and for 13 different companies . The average length of individual experience is 1 year and 1 month . Note that Manuel may not have shared all experience and actually has more experience.

Q: What is Manuel's latest experience?

Manuel's most recent position is .NET Developer, SAP Business One Consultant at Own Projects .

Q: What companies has Manuel worked for in recent years?

In recent years, Manuel has worked for Own Projects , cmt GmbH , Magnetbau Schramme GmbH & Co. KG , Spedition Stahmer , and SMF GmbH .

Q: Which industries is Manuel most experienced in?

Manuel is most experienced in industries like Information Technology , Education , and Food and Beverage . Manuel also has some experience in Manufacturing , Transportation , and Government and Administration .

Q: Which business areas is Manuel most experienced in?

Manuel is most experienced in business areas like Information Technology , Logistics , and Operations . Manuel also has some experience in Accounting , Finance , and Supply Chain Management .

Q: Which industries has Manuel worked in recently?

Manuel has recently worked in industries like Information Technology , Education , and Food and Beverage .

Q: Which business areas has Manuel worked in recently?

Manuel has recently worked in business areas like Information Technology , Logistics , and Operations .

Recommended expert

Iserlohn, Germany

Check rate

Experience

Jan 2025 - Dec 2026

2 years

.NET Developer, SAP Business One Consultant

Own Projects

DTO class generator: In-house development of a tool for the automatic generation of classes, functions, and methods for use in .NET Core projects based on SAP Business One Service Layer metadata
E-invoice import add-on: Development of a SAP Business One add-on / coresuite module for the automated import of ZUGFeRD e-invoices as incoming invoices – with configurable mapping to flexibly control the import logic across four mapping types (DIRECT, SQL, FIXED, EXPR). The add-on is available as a licensed product for SAP Business One customers.

Stack: SAP Business One, SAP Business One Service Layer, coresuite Country Package, C#

Jan 2022 - Dec 2026

5 years

Munich, Germany

Instructor & Course Author

cmt GmbH

PostgreSQL Basics & Advanced (2025/2026)
React for Advanced Users (2024/2025): React, Redux Toolkit, GraphQL, TailwindCSS, Vite, Vitest, Cypress, TypeScript
Laravel Compact Course (2025): PHP, Laravel, MySQL, PHPUnit, Docker — developed example project TaskFlow
Nx Compact Course (2025): Nx, TypeScript
Git Basics Course (2025): Git, GitHub, GitLab, CI/CD, Docker
ASP.NET Introduction (2025): ASP.NET Core MVC, Web API, Blazor, Razor Pages, ASP.NET Core Identity
Vue.js Basic Course (2023/2024): Vue.js, Pinia, Vite, Vitest, Cypress, TypeScript
React Basics (2022): React, Vite, Vitest, TypeScript
In each case, development of example projects, training materials incl. exercises, and course delivery

Jan 2022 - Dec 2022

1 year

Deggenhausertal, Germany

SAP Business One Consultant

Magnetbau Schramme GmbH & Co. KG

SAP Business One Service Layer: installation & configuration incl. table allowlist, column allowlist, and permissions
Customizing SAP Business One & beas Manufacturing
SQL queries for reports & alerts
Import/export interfaces for production & warehouse data

Stack: SAP Business One, C#, SQL, coresuite Country Package

Jan 2022 - Dec 2022

1 year

Hamburg, Germany

Full-Stack Developer

Spedition Stahmer

Porting of an Excel workbook to a warehouse management web application for putaway, picking, and inventory

Stack: Laravel, React, Redux Toolkit, Material UI

Jan 2021 - Dec 2021

1 year

Dortmund, Germany

Full-Stack Developer

SMF GmbH

Administration interface for the Monheim Pass

Stack: Spring Boot in the backend and Vue.js, Vuetify, Jest, Cypress & Storybook in the frontend

Jan 2019 - Dec 2026

8 years

Bad Grund, Germany

SAP Business One Consultant, Full-Stack Developer

Alfred Galke GmbH

SAP Business One Service Layer: installation & configuration including Table Allowlist, Column Allowlist, and permissions
Authorization concept in SAP Business One
E-invoicing (ZUGFeRD): creation & configuration of e-invoices with coresuite Designer
Document check: development of a coresuite Customize rule for automated checking of SAP Business One documents based on a SQL-based rule catalog (CTEs)
Multi-level batch tracking: SQL query for all movements of a batch
Warehouse management (transfer): development of a web application with Vue 3, Quasar, and TypeScript for transferring batch-managed items on warehouse locations in SAP Business One — with real-time connection via the SAP Business One Service Layer

Stack: SAP Business One, SAP Business One Service Layer, C#, SQL, coresuite Country Package, Vue 3, Quasar, TypeScript

Jan 2019 - Dec 2026

8 years

Balve, Germany

SAP Business One Consultant

WKN Datentechnik GmbH

E-invoicing (ZUGFeRD): creation & configuration of e-invoices with coresuite Designer
Billing assistant: development of a coresuite Customize rule for assisted billing in SAP Business One
Delivery – create devices in IT-Man: development of a coresuite Customize rule for the automated transfer of serial-number-managed devices and PCs/servers from SAP B1 delivery notes into an external IT management database (IT-Man)
Import incoming invoices via import template: development of a coresuite Customize rule for CSV-based import of incoming invoices into SAP Business One — with configurable import templates per vendor, file selection dialog, and automatic creation of invoice drafts

Stack: SAP Business One, C#, SQL, coresuite Country Package

Jan 2018 - Dec 2019

2 years

Wesel, Germany

.NET Developer, Full-Stack Developer

TRENDline GmbH & Co. KG

Dispo Online: development of an online platform (Laravel, Angular, NgRx) for providing and booking passenger counting jobs by external employees, as well as a desktop application (C#, Entity Framework, DevExpress) for internal order processing and preparing data for the portal

Stack: Laravel, Angular, NgRx, C#, Entity Framework, DevExpress

Jan 2017 - Dec 2023

7 years

Niederzier, Germany

SAP Business One Consultant

Polyfoam Kautschuk GmbH

SAP Business One Service Layer: installation & configuration including Table Allowlist, Column Allowlist, and permissions
Calculation module: Windows application connected to SAP Business One via the Service Layer (SQL queries, bills of materials, quotes) for calculating customer-specific requests
Multi-stage production module: coresuite Customize rule for creating multiple production orders
Production labels: layout for SAP Business One

Stack: SAP Business One including Service Layer, C#, SQL, DevExpress, coresuite Country Package

Oct 2014 - Dec 2015

1 year 3 months

IT Specialist for Application Development

Wrede GmbH Softwarekonzepte

Jan 2014 - Dec 2021

8 years

Full-Stack Developer

Various Web Clients

Booking platform for rehearsal rooms: Laravel, Vue.js, TypeScript
Administration software: Laravel, Angular, TypeScript, NgRx, TailwindCSS, Laravel Sanctum
Intranet application: Node.js, React, Next.js
Payment package for PayPal & Payrexx in Laravel (TIVITA GmbH, Mannheim)
Order management with Laravel & sevDesk integration (ella-Verlag, Düsseldorf)
Inventory management system with Laravel (Ballon-Mueller Diffusion GmbH, Herznach CH)
Request portal for processing travel requests with Laravel & WordPress (DNDS GmbH, Bergheim)
Partner portal with Laravel & WordPress (UrbanOffers, Vienna)

Jan 2013 - Dec 2026

14 years

Hamburg, Germany

SAP Business One Consultant

L.W.C. Michelsen GmbH

SAP Business One Service Layer: installation & configuration including table allowlist, column allowlist, and permissions
EDI interface: import/export of ORDERS, DESADV, INVOIC, IFTMIN from SAP Business One
E-invoicing (ZUGFeRD): creation & configuration of e-invoices with coresuite Designer
DATEV export: development of a Windows application for the automated preparation and export of DATEV-relevant postings from SAP Business One into DATEV format (C#, SQL, DevExpress)
SEPA generator: development of a Windows application for the automated creation of SEPA payment files from SAP Business One data and direct transfer to the bank (C#, SQL, DevExpress)
Shopware integration: automated transfer of orders, items, and customers
MDE logistics: Android app (Xamarin & MAUI) for picking, goods receipt, and stock transfers
WMS integration: automatic synchronization of inventory levels between SAP Business One and the freight forwarder
Commission accounting: development of a Windows service for the automatic calculation of commissions, creation of commission reports, and automatic sending and creation of the related incoming invoices in SAP Business One (C#, SQL, SharpShooter Reports)
Reports: creation of various SQL-based reports and analyses in SAP Business One (SQL, SharpShooter Reports, Crystal Reports)
Layout adjustments: adaptation and creation of sales and purchase documents in SAP Business One (coresuite Country Package, Crystal Reports)

Stack: SAP Business One, C#, SQL, coresuite Country Package

Mar 2012 - Present

14 years 5 months

Freelance Full-Stack Developer & IT-Trainer

Self-employed

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Education, Food and Beverage, Manufacturing, Transportation, and Government and Administration.

Information Technology

Education

Food and Beverage

Manufacturing

Transportation

Government and Administration

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Logistics, Operations, Accounting, Finance, and Supply Chain Management.

Information Technology

Logistics

Operations

Accounting

Finance

Supply Chain Management

Summary

Hello, my name is Manuel Kübler. I am a freelance full-stack developer and IT trainer with over 12 years of project experience. My focus is on developing modern web applications with React, Vue.js, Angular, Laravel, and Node.js, as well as designing and running intensive training courses for software companies and universities. In addition, I have deep knowledge in SAP Business One development with C# and in the coresuite Country Package (coresuite Designer, coresuite Customize, coresuite Enterprise Search). I stand out through a structured, quality-conscious way of working, personal responsibility, and reliability.

Skills

C#
Php
Javascript
Typescript
Sql
Java
React
Vue.Js
Laravel
Node.Js
Angular
Entity Framework
Apollo Graphql
Nest.Js
Nx
Quarkus / Spring Boot
Storybook
Css
Bootstrap
Tailwind Css
Material Ui
Vuetify
Devexpress
Sap Business One
Sap B1 Service Layer
Coresuite Country Package
Edi
Beas
Git
Jira
Visual Studio / Vs Code
Vite
Intellij & Phpstorm
Docker / Ci-Cd
Xamarin
Claude
Chatgpt
Jest
Cypress
Vitest
React Testing Library
Phpunit
Nunit / Xunit
Junit

Languages

German

Native

English

Intermediate

Education

Oct 2022 - Jun 2026

FH Südwestfalen

Master of Science · Applied Computer Science

Oct 2017 - Jun 2022

FH Südwestfalen

Bachelor of Science · Applied Computer Science · 2.5

Oct 2011 - Jun 2012

VoiceIn GmbH

Training as an IT Specialist in Application Development · Application Development · Rottenburg am Neckar, Germany

...and 2 more

Statistics

Experience

Total positions 13

Experience in Information Technology 14.5 y

Avg length 5 y 4 m

Longest experience 14 y 4 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles .NET Developer, SAP Business One Consultant, Instructor & Course Author, SAP Business One Consultant

Main industries Information Technology, Education, Food and Beverage

Main business areas Information Technology, Logistics, Operations

Qualifications

Highest degree Master

Profile

Created

July 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Manuel based?

Manuel is based in Iserlohn, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Manuel speak?

Manuel speaks the following languages: German (Native), English (Intermediate).

How many years of experience does Manuel have?

Manuel has at least 14 years of experience. During this time, Manuel has worked in at least 8 different roles and for 13 different companies. The average length of individual experience is 1 year and 1 month. Note that Manuel may not have shared all experience and actually has more experience.

What roles would Manuel be best suited for?

Based on recent experience, Manuel would be well-suited for roles such as: .NET Developer, SAP Business One Consultant, Instructor & Course Author, SAP Business One Consultant.

What is Manuel's latest experience?

Manuel's most recent position is .NET Developer, SAP Business One Consultant at Own Projects.

What companies has Manuel worked for in recent years?

In recent years, Manuel has worked for Own Projects, cmt GmbH, Magnetbau Schramme GmbH & Co. KG, Spedition Stahmer, and SMF GmbH.

Which industries is Manuel most experienced in?

Manuel is most experienced in industries like Information Technology, Education, and Food and Beverage. Manuel also has some experience in Manufacturing, Transportation, and Government and Administration.

Which business areas is Manuel most experienced in?

Manuel is most experienced in business areas like Information Technology, Logistics, and Operations. Manuel also has some experience in Accounting, Finance, and Supply Chain Management.

Which industries has Manuel worked in recently?

Manuel has recently worked in industries like Information Technology, Education, and Food and Beverage.

Which business areas has Manuel worked in recently?

Manuel has recently worked in business areas like Information Technology, Logistics, and Operations.

What is Manuel's education?

Manuel holds a Master in Applied Computer Science from FH Südwestfalen and a Bachelor in Applied Computer Science from FH Südwestfalen.

What is the availability of Manuel?

Manuel is immediately available part-time for suitable projects.

What is the rate of Manuel?

Manuel's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.