Flutter
Cross-platform mobile apps with polished UI, smooth motion, and maintainable architecture.
Freelance software engineering
Joshua Andreas Wellbrock
Freelance software engineer — Flutter and solution architecture for regulated and industrial systems. Research focuses on AI-augmented engineering and delivery.
I co-authored Agile V™, an open standard for AI-augmented engineering.
Core expertise
I help teams ship reliable cross-platform software where mobile meets hardware and regulated environments.
BLE integration
Bluetooth Low Energy between apps and devices — pairing, protocols, and field-ready diagnostics.
NFC
Contactless configuration, identification, and secure data exchange in industrial and mobile contexts.
IoT & embedded
Bridging smartphones with sensors, microcontrollers, and cloud backends in IIoT-style systems.
Featured projects
Selected engagements from industry and the public sector. Stacks and domains reflect real delivery constraints.
M-Trust™ — Digital Trust Framework
Merck KGaA, Darmstadt, Germany
Building digital trust in value chains: quality and reliability in networked M2M and IIoT business models.
- Flutter
- BLE
- RFID
- PlatformIO
- Digital identities
- Crypto-anchor
- ESP32/STM32
- Multivariant analysis
- CI/CD
- Azure DevOps/GitHub
Mobile app — federal program
Federal authorities, Wiesbaden, Germany
Technical conception, design, implementation, documentation, and maintenance. The project is related to the P20 program of the Federal Ministry of the Interior and Community. The exact subject matter is classified and cannot be specified further — thank you for your understanding.
- Flutter
- OpenAPI
- Java (JDK 8–17)
- Web services
- XML
- JAX-RS
- Java EE (JEE 6/7)
WDGN — smart encoder app
Wachendorff Automation GmbH & Co. KG, Geisenheim, Germany
Mobile app to configure and diagnose the world's first NFC-configurable encoders.
- Flutter
- IoT
- Embedded
- NFC
- Security concept
Dashboard4Ewon
VISUALYS GmbH, Geisenheim, Germany
Mobile access to Ewon devices and one-click installation of Dashboard4Ewon on Ewon Flexy.
- Flutter
- MQTT
- IoT
- OpenAPI
- JSON
- Web services
Consulting & mentoring — Flutter / BLE
SSI Software Services GmbH, Munich / habemus! electronic + transfer GmbH
Consulting and mentoring for new Flutter developers building a BLE app to control a smart device.
- Flutter
- BLE
- IoT
- Embedded
ResAdmin — digital operations for emergency services
Rettungsdienst Corneli GmbH / Johanniter Regionalverband Rheinhessen, Germany
Reducing workload through digitization: intelligent logbook, materials management, capacity checks, and patient registration via app, phone, or SMS.
- Flutter
- NFC
- Firebase
- Push notifications
- Maps
- QR/PDF
- PostgreSQL
- REST
- Docker
- AWS
Certificates & degrees
- Certificate
Certified Software Architect (CPSA‑F)
iSAQB
- Certificate
Generative AI Fundamentals
Google Cloud
- Certificate
IBM Z Xplore — Concepts
IBM
- Degree
B. Sc. Computer Science
TH Bingen
Publications
Preprints and research alongside engineering practice.
arXiv: 2604.19818
Beyond Task Success: An Evidence-Synthesis Framework for Evaluating, Governing, and Orchestrating Agentic AI
Christopher Koch, Joshua A. Wellbrock
Bounded evidence synthesis across evaluation, governance, orchestration, and assurance for agentic AI — introducing a governance-to-action closure gap, a four-layer framework, an ODTA runtime-placement test, and a minimum action-evidence bundle.
arXiv: 2602.20684
Agile V: A Compliance-Oriented Framework for AI-Augmented Engineering — From Concept to Audit-Ready Delivery
Christopher Koch, Joshua A. Wellbrock
Merges Agile iteration with V-model verification into a continuous Infinity Loop with human approval gates; feasibility case study on a HIL system supports audit artifacts by default, full requirement-level verification, and low human interaction per cycle.