Joshua Wellbrock - Flutter Software Engineer, IIoT

Recommended expert

Bingen, Germany

Check rate

Experience

Jan 2024 - Dec 2024

1 year

Software Engineer

Building digital trust in value chains
Ensuring digital trust, enabling quality and reliability in connected machine-to-machine (M2M) worlds and new business models in the Industrial Internet of Things (IIoT)
Technologies: Flutter 3.X/Dart 3.X, BLE & RFID, PlatformIO, CI/CD, Azure DevOps/Github, microcontroller/embedded programming (ESP32, STM32), multivariate data analysis

Oct 2023 - Dec 2023

3 months

KPI dashboard for emergency medical services

Development of a KPI dashboard using predictive algorithms for procurement planning and budget calculation in emergency medical services
Integration into an existing PWA
Development of predictive algorithms to forecast material demand and fuel consumption
Comparison of forecast quality with classic statistical methods
Client: Bingen University of Applied Sciences, Rettungsdienst Corneli GmbH

Oct 2023 - Dec 2023

3 months

Darmstadt, Germany

Senior Software Architect / Consultant

Merck KGaA

Technical concept, design, implementation, documentation, and maintenance of an app with Flutter
Project subject under confidentiality
Technologies: Flutter 3.X/Dart 3.X, OpenAPI, Java Standard Edition (JDK 8–17), web services, XML, JAX-RS, JavaEE (JEE 6/7)

Apr 2023 - Aug 2023

5 months

Lead Frontend Developer – Training Portal OKR Dashboard

Platform for company management using OKR
Technologies: Flutter/Dart, Microsoft Azure, Microsoft Azure AD, Microsoft Azure CI/CD, Kubernetes
Client: student project TH Bingen & System Vertrieb Alexander GmbH, Wiesbaden
Final grade: 1.0

Apr 2023 - Jul 2023

4 months

Developer – Webshop Scraper & Data Analytics

Development of a webshop scraper and data analytics solution with predictive models
Technologies: Python, Apache Kafka & Kafka Streams, Elasticsearch & Kibana, linear regression for data analytics, Docker
Project language: English
Final grade: 1.3

Jan 2023 - Aug 2023

8 months

Wiesbaden, Germany

Developer / Software Architect

Bundeskriminalamt

Development of a mobile app for Dashboard4Ewon to access Ewon devices with one-click installation on Ewon Flexy
Technologies: Flutter/Dart

Jan 2023 - Aug 2023

8 months

Geisenheim, Germany

Developer / Software Architect

VISUALYS GmbH

Development of the Dashboard4Ewon mobile app for mobile access to Ewon devices and one-click installation on Ewon Flexy
Technologies: Flutter/Dart

Dec 2022 - Aug 2023

9 months

Mainz, Germany

Project Manager / Developer / Software Architect

Johanniter Unfallhilfe Regionalverband Rheinhessen

ResAdmin: Internal management portal, PWA & mobile app to digitize rescue services and simplify the registration of emergency patients
Features: smart trip log, materials management, central capacity records, patient registration via app
Technologies: Flutter/Dart, Google Firebase (Cloud Messaging, Cloud Firestore, Cloud Functions), Push Notifications, NFC, QR code and PDF generator, SQL database/PHP/Authentication, Google Maps/Geolocation, AWS (PostgreSQL, Python web scraper, Python linear regression, REST API, Docker)

Oct 2022 - Feb 2023

5 months

Developer – OKR Dashboard Training Portal

Platform for company management using OKRs
Technologies: ASP.NET (C#), Flutter/Dart, Microsoft Azure, Jakarta RESTful Web Services, Docker, Kubernetes
Client: university project at TH Bingen
Final grade: 1.0

Oct 2022 - Feb 2023

5 months

Developer – Distributed Auction Platform

Development of a distributed auction platform
Technologies: Flutter/Dart, Java, Spring Framework, RabbitMQ, Kubernetes
Project language: German
Final grade: 1.3

Jun 2022 - Jul 2022

2 months

Würzburg, Germany

Developer

webfactor media GmbH

KiKom mobile app for kindergarten digitalization to speed up the product backlog
Technologies: Flutter/Dart, BLoC state management

Feb 2022 - Sep 2022

8 months

Consultant / Mentor

SSI Software Services GmbH

Consulting and mentoring new Flutter developers
Development of a BLE mobile app
Technologies: Flutter/Dart, Bluetooth Low Energy

May 2021 - Dec 2022

1 year 8 months

Hybrid

HyKI – Hybrid AI Industrial IoT Platform

Research and development of a hybrid digitalization platform that combines expert knowledge and AI to optimize machines
Universal platform for different machines and applications
Client: Wachendorff Automation GmbH & Co. KG, Visualys GmbH, Hochschule Rhein-Main

May 2021 - Dec 2022

1 year 8 months

Geisenheim, Germany

Developer

Wachendorff Automation GmbH & Co. KG

Development of SECAD, a mobile app for configuring and diagnosing rotary encoders that can be configured via NFC
Technologies: Flutter/Dart, encryption, local storage (sqflite), NFC, generic software and security concept

Oct 2020 - Apr 2021

7 months

Münster-Sarmsheim, Germany

Developer

Rettungsdienst Corneli GmbH

Development of PDFBox: containerized REST API for editing, validating, and creating PDF files
Technologies: Java/Maven, Docker, PDF generation, PDF manipulation, PDF validation (PDF/A)

Feb 2020 - Jun 2020

5 months

Rüsselsheim, Germany

Developer

Karon Beratungsgesellschaft mbH

Warehouse management system and order intake PWA & mobile app
Technologies: Flutter/Dart, SQL database/PHP/authentication, PDF generation, QR code reader/creator

Feb 2020 - Feb 2020

1 month

Grolsheim, Germany

Developer

BF-Eventtechnik

WordPress website
Technologies: WordPress

Sep 2019 - Dec 2019

4 months

firstAID – Smart and interactive first aid

Development of a smart, interactive first aid app
Technologies: Flutter/Dart, BLoC state management

Aug 2019 - Dec 2019

5 months

SocialRide – Mobile network for motorcycle riders

Mobile app (iOS/Android) as a social network for motorcycle riders
Technologies: Flutter/Dart, in-app purchase, Google Maps, Google Firebase Authentication

Mar 2019 - Jun 2022

3 years 4 months

Landau, Germany

Project Manager / Developer / Software Architect

Schoppe-Wellbrock Transport Service GbR

Internal order and working time management portal, PWA & mobile app
Technologies: Flutter/Dart, Google Firebase (Cloud Messaging, Cloud Firestore, Cloud Functions), push notifications, PDF generation, image capture and storage

Dec 2018 - Jun 2023

4 years 7 months

Münster-Sarmsheim, Germany

Project Manager / Developer / Software Architect

Rettungsdienst Corneli GmbH

Initial development of ResAdmin: internal management portal, PWA & mobile app for emergency service digitalization and patient registration
Technologies: Flutter/Dart, Google Firebase (Cloud Messaging, Cloud Firestore, Cloud Functions), push notifications, NFC, QR code and PDF generator, SQL database/PHP/authentication, Google Maps/geolocation, AWS (PostgreSQL, Python web scraper, Python linear regression, REST API, Docker)

Industry Experience

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

Experienced in Information Technology, Healthcare, Transportation, Manufacturing, Government and Administration, and Automotive.

Information Technology

Healthcare

Transportation

Manufacturing

Government and Administration

Automotive

Business Area Experience

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

Experienced in Information Technology, Product Development, Project Management, Research and Development, Quality Assurance, and Business Intelligence.

Information Technology

Product Development

Project Management

Research and Development

Quality Assurance

Business Intelligence

Languages

German

Advanced

English

Advanced

Education

Bingen University of Applied Sciences

Bingen, Germany

Statistics

Experience

Total positions 21

Experience in Information Technology 5.5 y

Avg length 10 m

Longest experience 4 y 6 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Software Engineer, KPI dashboard for emergency medical services, Senior Software Architect / Consultant

Main industries Information Technology, Healthcare, Transportation

Main business areas Information Technology, Product Development, Project Management

Qualifications

Highest degree Bachelor

Profile

Created

April 2024

Last Update

July 2026

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Have questions? Find more information here.

Joshua is based in Bingen, Germany.

Joshua speaks the following languages: German (Advanced), English (Advanced).

Joshua has at least 6 years of experience. During this time, Joshua has worked in at least 14 different roles and for 11 different companies. The average length of individual experience is 3 months. Note that Joshua may not have shared all experience and actually has more experience.

Based on recent experience, Joshua would be well-suited for roles such as: Software Engineer, KPI dashboard for emergency medical services, Senior Software Architect / Consultant.

Joshua's most recent position is Software Engineer.

In recent years, Joshua has worked for Merck KGaA, Bundeskriminalamt, VISUALYS GmbH, Johanniter Unfallhilfe Regionalverband Rheinhessen, and webfactor media GmbH.

Joshua is most experienced in industries like Information Technology, Healthcare, and Transportation. Joshua also has some experience in Manufacturing, Government and Administration, and Automotive.

Joshua is most experienced in business areas like Information Technology, Product Development, and Project Management. Joshua also has some experience in Research and Development, Quality Assurance, and Business Intelligence.

Joshua has recently worked in industries like Information Technology, Healthcare, and Transportation.

Joshua has recently worked in business areas like Information Technology, Product Development, and Project Management.

Joshua holds a Bachelor from Bingen University of Applied Sciences.

Joshua is immediately available for suitable projects.

Daily Rate Distribution

0 2 4 6 8

<€640 €800-960 €1280+

The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1000

750

500

250

Daily rate avg. 851 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

1000

750

500

250

Median rate 840 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.