freiberufler Senior Fullstack Developer, Mobile App Developer, AWS Architect auf freelance.de

Senior Fullstack Developer, Mobile App Developer, AWS Architect

zuletzt online vor 1 Tagen
  • auf Anfrage
  • 49090 Osnabrück
  • auf Anfrage
  • de  |  en
  • 26.03.2025

Kurzvorstellung

Mobile & Full-Stack Developer with CTO experience, building scalable, high-performance solutions by combining deep tech expertise with strategic thinking.

Qualifikationen

  • Flutter10 J.
  • Full Stack Developer6 J.
  • Mobile Application Development10 J.
  • Amazon Web Services (AWS)6 J.
  • API-Entwickler12 J.
  • Golang3 J.
  • iOS Entwicklung10 J.
  • Softwareentwickler3 J.
  • Technischer Leiter
  • Webentwickler3 J.

Projekt‐ & Berufserfahrung

Mobile App Engineer
accensors GmbH, Espelkamp
2/2025 – 3/2025 (2 Monate)
High-Tech- und Elektroindustrie
Tätigkeitszeitraum

2/2025 – 3/2025

Tätigkeitsbeschreibung

Neuentwicklung einer App zur Auswertung & Kalibrierung von Sensoren via Bluetooth LE

Dieses Projekt konzentrierte sich auf die Entwicklung einer Flutter-basierten Anwendung, mit einem Schwerpunkt auf modernem UI/UX-Design, nahtloser Integration von Bluetooth Low Energy (BLE) zur Sensorregistrierung und -kalibrierung sowie der Optimierung von Performance und Codequalität für langfristige Wartbarkeit und Skalierbarkeit.

- **Flutter**, unter Einhaltung aktueller technologischer Standards und Best Practices.
- **Design und Implementierung einer intuitiven UI/UX**, mit Fokus auf eine moderne, benutzerfreundliche Oberfläche mit flüssigen Interaktionen und hoher Benutzerfreundlichkeit.
- **Integration von Bluetooth Low Energy (BLE)** zur **Sensorregistrierung und -kalibrierung**, einschließlich der Entwicklung robuster Kommunikationsprozesse, um eine stabile und effiziente Verbindung sicherzustellen.
- **Optimierung der App-Performance und Codequalität**, um langfristige Wartbarkeit und Skalierbarkeit zu gewährleisten.

Eingesetzte Qualifikationen

Android Entwicklung, Dart, Flutter, iOS Entwicklung, Kotlin, Mobile Application Development, Swift (Programmiersprache)

Full-Stack Sofwareengineer & Cloud Architect (Freelance)
Kundenname anonymisiert, Hildesheim
1/2024 – 1/2025 (1 Jahr, 1 Monat)
Finanzdienstleister
Tätigkeitszeitraum

1/2024 – 1/2025

Tätigkeitsbeschreibung

In this project, I was responsible for the conceptualization and implementation of a comprehensive financial analysis platform. The platform provides data-driven insights and trading strategy recommendations based on advanced financial charting algorithms.

A core aspect of my work was designing and deploying a scalable AWS cloud infrastructure, ensuring high availability and performance for real-time financial data processing. Additionally, I implemented a subscription-based monetization model using Stripe, allowing seamless user onboarding and payment management.

My Key Responsibilities:
• Conceptualization and development of a financial analysis platform
• Implementation of AWS cloud infrastructure, ensuring scalability and reliability
• Integration of Stripe for subscription management, enabling seamless billing and access control
• Development of a modern web frontend using TypeScript, React, and Next.js for an intuitive user experience
• Design and implementation of financial charting algorithms, generating trading strategy recommendations

This role required deep expertise in cloud architecture, financial data processing, and full-stack web development, combining cutting-edge technologies with data-driven trading insights to deliver a powerful financial analytics solution.

Eingesetzte Qualifikationen

Amazon Web Services (AWS), API-Entwickler, Backend Entwickler, Full Stack Developer, Golang, Python, React (JavaScript library), Softwareentwickler, Typescript, Webentwickler

Mobile App Developer (Freelancer)
Albrecht Jung, Schalksmühle
5/2023 – 1/2025 (1 Jahr, 9 Monate)
Gebäudetechnik
Tätigkeitszeitraum

5/2023 – 1/2025

Tätigkeitsbeschreibung

In this project, my primary responsibility was the development of a native iOS application using Swift and SwiftUI. The goal was to create a seamless and intuitive app experience while ensuring robust communication with smart home devices.

A key aspect of my work involved the integration of Bluetooth Low Energy (BLE) and Bluetooth Mesh, enabling reliable device control and efficient communication between multiple smart home components.

My Key Responsibilities:
• Developing a fully native iOS app with Swift & SwiftUI
• Implementing BLE and Bluetooth Mesh communication protocols
• Optimizing Bluetooth interactions for low latency and energy efficiency
• Ensuring a smooth and intuitive user experience, aligned with iOS design best practices
• Collaborating with hardware engineers and backend developers to achieve a fully integrated system

This role required deep expertise in iOS development, Bluetooth communication, and real-time device interactions, with a strong focus on performance optimization and user experience.

Eingesetzte Qualifikationen

Android, API-Entwickler, iOS, iOS Entwicklung

CTO & Lead Software Engineer (Festanstellung)
AeroSys AG, Osnabrück
5/2021 – 5/2023 (2 Jahre, 1 Monat)
Luft- und Raumfahrtindustrie
Tätigkeitszeitraum

5/2021 – 5/2023

Tätigkeitsbeschreibung

As the CTO of an innovative startup developing the world’s first digital co-pilot, I am responsible for the technological implementation and the strategic advancement of the platform. My goal is to foster a positive and performance-driven team culture that enables innovation and extraordinary achievements.

I develop and execute the company’s technological vision, make groundbreaking decisions, and implement modern development standards to ensure the highest quality and innovation. A key aspect of my work is overseeing the technical architecture and scalability of the platform to support sustainable growth and long-term competitiveness.

In close collaboration with the board and other stakeholders, I contribute to achieving corporate objectives and refining strategic direction. Additionally, I support the company’s long-term planning to maximize technological potential.

A particular focus is on overseeing research and development, especially the integration of advanced technologies in the aviation sector. By leveraging cutting-edge technologies, we drive digitalization and automation in the industry, actively shaping the future of aviation.

Eingesetzte Qualifikationen

Amazon Web Services (AWS), API-Entwickler, Cloud Computing, Datenbankentwicklung, Embedded Linux, Flutter, Full Stack Developer, Golang, Infrastrukturarchitektur, Internet of Things (IoT), Linux Entwicklung, Machine Learning, Mobile Application Development, Mongodb, Mysql, Node.Js, Postgresql, Projektleitung / Teamleitung (IT), Python-Programmierer, Softwareentwickler, SQL, Teamleiter IT, Typescript, Webentwickler

Software Engineer for Mobile Apps (Festanstellung)
Slashwhy, Osnabrück
9/2019 – 3/2021 (1 Jahr, 7 Monate)
IT & Entwicklung
Tätigkeitszeitraum

9/2019 – 3/2021

Tätigkeitsbeschreibung

formerly SALT AND PEPPER Software GmbH & Co. KG

I develop and implement software solutions with a focus on app development for iOS and Android. I work on projects across various industries, such as agriculture and consumer electronics, each with its own specific technical requirements. My focus is on creating intuitive and user-friendly applications tailored to individual customer needs. By leveraging modern technologies and frameworks, I ensure robust and scalable solutions. In close collaboration with interdisciplinary teams, I contribute to project success and drive innovative developments forward.

Eingesetzte Qualifikationen

Dart, Flutter, Kotlin, Mobile Application Development, Swift (Programmiersprache), Xamarin, Android, iOS

CTO & Co-Founder, Lead Software Engineer (Festanstellung)
KickOn GmbH, Osnabrück
3/2018 – 5/2021 (3 Jahre, 3 Monate)
Gastronomie
Tätigkeitszeitraum

3/2018 – 5/2021

Tätigkeitsbeschreibung

I lead the development team and foster a positive team culture to create a productive and innovative work environment. In doing so, I develop and implement the company’s technological vision, make strategic decisions, and establish modern development processes to enhance efficiency and quality.

A key focus is on building and scaling the technological infrastructure to support the company’s growth while ensuring the security and scalability of the platform. Additionally, I oversee the entire software development lifecycle—from the concept phase to market launch—to deliver sustainable and high-performance solutions

Eingesetzte Qualifikationen

Amazon Web Services (AWS), Android Entwicklung, Angular, API-Entwickler, Cloud Computing, Dart, Datenbankentwicklung, Flutter, Full Stack Developer, Graphql, Infrastrukturarchitektur, iOS Entwicklung, Lean Startup, Mobile Application Development, Mongodb, Node.Js, Postgresql, Projektmanagement (IT), React (JavaScript library), Software Architecture, SQL, Teamleiter IT, Web Entwicklung

Head of Mobile App Development, Mobile App Engineer & Consultant (Festanstellung)
LMIS AG, Osnabrück
2/2013 – 7/2019 (6 Jahre, 6 Monate)
IT & Entwicklung
Tätigkeitszeitraum

2/2013 – 7/2019

Tätigkeitsbeschreibung

As Head of Mobile Application Development at LMIS, I lead the development team for mobile applications and take responsibility for both technical implementation and strategic direction. My role encompasses a combination of technical leadership, hands-on development, and organizational collaboration to drive innovation and ensure the success of mobile solutions.

Key Responsibilities:
- Team Leadership: Managing and mentoring a team of mobile developers to create high-quality applications while fostering a productive and innovative work environment.
- Software Engineering: Actively contributing as a software engineer for iOS (Swift) and Android (Kotlin), with additional expertise in cross-platform development using Flutter.
- Technology Strategy: Defining best practices, selecting suitable technologies, and ensuring the development of scalable, robust, and user-friendly mobile applications.
- Mid-Level Management: As part of the Middle Management team, I contribute to shaping the company’s strategic direction and report directly to the CEO.
- Process Optimization & Organizational Development: Supporting and optimizing company-wide development processes, fostering collaboration across departments, and driving technological innovation within the organization.

Eingesetzte Qualifikationen

Mobile Application Development, Agile Methodologie, Android Entwicklung, API-Entwickler, Dart, Flutter, iOS Entwicklung, Java (allg.), Json, Kotlin, Node.Js, Projektleitung / Teamleitung (IT), Swift (Programmiersprache), Typescript

Zertifikate

AWS Certified AI Practitioner
Amazon Webservices (AWS)
2025
AWS Certified Solutions Architect – Associate
Amazon Webservices (AWS)
2024
AWS Certified Cloud Practitioner
Amazon Webservices (AWS)
2022

Ausbildung

Computer Science
Master of Science
University of Osnabrück
2012
Osnabrück
Physics and Computer Science
Bachelor of Science
Universität Osnabrück
2009
Osnabrück

Über mich

Software development is more than just writing code for me—it’s about creating real value through technology. As an experienced Mobile & Full-Stack Developer, I have a deep understanding of modern software architectures and build high-performance, scalable applications for web, mobile, and cloud environments. My expertise spans the full development lifecycle, from mobile app development with Flutter, Swift, and Kotlin to backend architectures using Golang, Node.js, and AWS.

With my background as a CTO and Lead Software Architect, I have not only built technical systems but also developed strategies for scalable platforms, led agile teams, and overseen the architecture of complex software solutions. I understand both the technical depth of development and the broader requirements for long-term scalability, performance, and maintainability.

I thrive on tackling complex technical challenges and crafting elegant solutions that are not only functional but also efficient and maintainable in the long run. Clean code, high performance, and sustainable software development are key principles that guide my work.

My expertise includes:

✅ Mobile Apps: Native iOS & Android development (Swift, Kotlin) and cross-platform solutions with Flutter
✅ Web Development: Next.js, React, TypeScript, TailwindCSS
✅ Backend & Cloud: API development with Golang/Node.js, cloud architectures with AWS (Lambda, DynamoDB, RDS, EventBridge, S3)
✅ Architecture & Scaling: Optimizing existing systems and providing technical consulting for sustainable software solutions

Beyond coding, I enjoy working hands-on in agile teams, supporting companies as a project lead, and driving technical concepts for new software products. My passion lies in leveraging smart architectures and modern technologies to build innovative solutions that stand the test of time.

Persönliche Daten

Sprache
  • Deutsch (Muttersprache)
  • Englisch (Gut)
Reisebereitschaft
auf Anfrage
Arbeitserlaubnis
  • Europäische Union
  • Schweiz
Home-Office
bevorzugt
Profilaufrufe
111
Alter
39
Berufserfahrung
12 Jahre und 2 Monate (seit 01/2013)
Projektleitung
7 Jahre

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