Freelancer profile translated to English.

Description

As a freelance software developer, I combine native .NET/C# application development, modern cloud infrastructures, and hardware-related embedded programming. With my background in mechanical engineering (B.Sc. at TU Braunschweig), I bring a deep technical understanding of industrial and regulated environments.

My focus is on implementing end-to-end solutions – from firmware (C) through robust Azure backends to cross-platform apps with .NET MAUI. I have extensive practical experience, particularly in the Healthcare IoT and medical technology sectors, regarding data security and system stability.

Key Information:

• Availability: Immediately (100% utilization, remote)

• Daily rate: €600 / day (Basis: €75/h)

Industry field of expertise

Languages

German
Native or bilingual
English
Fluent
Polish
Native or bilingual

Workplace preferences

Can work on-site

Braunschweig (up to 50km)

Ingenieurbüro Dr. Eugen Koch,
Software Developer
MECHANICAL ENGINEERING
October 2023 - March 2026 (2 years and 5 months)
38 Braunschweig, Germany
Conception and development of a complete, industrial end-to-end solution in the Healthcare IoT sector, from hardware-related firmware to cloud connectivity and mobile end application:

• Cross-Platform App Development: Programming a high-performance mobile application for Android and iOS based on .NET MAUI for visualizing and processing sensor data.
• Hardware-Related Firmware Development: Implementation of embedded firmware in C for PSoC microcontrollers. Successful execution of the complex system migration from PSoC Creator to the modern ModusToolbox environment.
• Connectivity & Real-time Data: Establishing a stable Bluetooth Low Energy (BLE) connection for secure and latency-free real-time transmission of critical measurement data between hardware and app.
• Cloud Infrastructure & Backend: Development of a robust ASP.NET Core backend in Microsoft Azure. Implementation of secure REST APIs, relational database architectures, and modern user authentication via OAuth 2.0.
• Web Client Integration: Creation of the web client and seamless integration with the backend interfaces.

Due to the medical technology context, the project's focus was particularly on high data security, system stability, and clean documentation.
Bluetooth Low Energy ASP.NET Core C# C Microsoft Azure
Technische Universität Braunschweig
Research Assistant
June 2021 - June 2023 (2 years)
Practical work in the mechanical engineering and automation environment. Practical support in the laboratory for the production of lithium-ion batteries and in the manufacturing process of fuel cells.