Andreas Spernol-Freelance Software Developer
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Experience
Mobile and Web Portal Full-Stack Development (Freelance)
- Maintenance and further development of a web portal and a mobile app as a full-stack developer.
- Handling customer requests and bug fixes.
- Implementing REST APIs and database access with Java Spring.
- Maintaining and enhancing a web frontend with AngularJS.
- Maintaining and enhancing an iOS and Android mobile app with Qt/C++/QML, including updating the app in the respective stores.
- Technologies: Qt/C++/QML, AngularJS, Java Spring, MongoDB, OAuth.
Full-Stack Web Portal Development (Logistics)
- Maintenance and further development of a web portal in the logistics sector as a full-stack developer.
- Implementing backend logic and REST APIs with ASP.NET Core, SQL, and Entity Framework.
- Implementing the login process with JWT and token refresh.
- Implementing the web frontend with Blazor.
- Technologies: C#/.NET, Blazor, ASP.NET Core, SQL, Entity Framework, JWT.
Backend Modernization (Banking)
- Member of the internal Scrum team as a backend developer.
- Implementing REST APIs, business logic, and database access with C#/.NET, Entity Framework, and LINQ.
- Configuring and customizing the application using JavaScript.
- Technologies: C#/.NET, ASP.NET Core, SQL, Entity Framework, LINQ, NUnit, JavaScript, Scrum.
Head of Software Development
Traxon Technologies Europe GmbH
- Leading an international team of 12 (DE, HK, Shanghai), ensuring time-to-market for new lighting control products.
- Implementing and standardizing Azure DevOps build pipelines (CI/CD) to automate tests and store uploads, increasing deployment speed and process reliability. Expanding test automation.
- Successfully introducing Flutter as the cross-platform standard, including setting up and training a new UI development team in Shanghai to improve development efficiency.
- Designing and implementing core lighting control software (C#/WPF) and related cross-platform UIs for web, iOS, and Android (Flutter).
- Technologies: Scrum, Jira, Git, Azure DevOps, MS App Center, C#/.NET, WPF, XAML, ASP.NET Core, Xamarin, C++, Flutter, Flutter_test, Mockito, Flutter integration_test, REST, MQTT, gRPC, SignalR, JSON, InfluxDB, Linux (Raspberry Pi), Docker.
Full Stack Senior Software Developer
Traxon Technologies Europe GmbH
- Designing and developing an automation framework for lighting control.
- Designing and implementing the central lighting control software (C#/WPF).
- Technologies: Visual Studio 2017, C#/.NET, WPF, XAML, NUnit, C++, Scrum, Jira, Git, Linux (Raspberry Pi).
Full Stack Software Developer
BST International GmbH
- Evaluation of Qt as a foundation for future products.
- Development of a PC software framework using Qt C++/QML to drive a line scan camera and perform image processing tasks.
- Design and development of a network-transparent data layer for interprocess communication.
- Design of the interprocess communication layer and task coordination between the GUI and measurement applications.
- Development of line scan camera software for defect inspection in the printing process (GUI in C# WPF).
- Technologies: Visual Studio 2015, C++, Qt/QML, Team Foundation Server, Qt Creator, C#/.NET, WPF, NUnit, Test-driven Development, CUDA.
Backend Software Developer
dSPACE GmbH
- Test-driven backend development for integrating modeled Matlab tasks with a real-time operating system (control engineering).
- Focus on specification, implementation and automated component tests.
- Technologies: Visual Studio 2008, C#/.NET, C++, Matlab, Python, XML, NUnit, Test-driven Development, MKS.
Backend Software Developer
AZ Direct GmbH part of Bertelsmann Marketing Services
- Development of high-performance address validation software.
- Performance analysis and optimization.
- Technologies: Visual Studio 2005, Intel VTune, ANSI C++, XML, MySQL.
Full Stack Software Developer
ISRA Vision Lasor GmbH
- Development of image processing software for surface inspection and commissioning of systems at customer sites at home and abroad.
- Development of line scan camera software for defect inspection in the glass manufacturing process.
- Own project responsibility since April 2004.
- Technologies: Visual Studio 6.0, C++, MFC, DCOM/ATL, TCP/UDP-IP, OPC.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Manufacturing, Automotive, Information Technology, Banking and Finance, Transportation, and Advertising.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Project Management, and Quality Assurance.
Summary
Experienced software developer and tech lead with over 20 years of experience in designing, architecting, and implementing complex backend and full-stack solutions. Specializing in C#/.NET, C++, and Flutter/cross-platform development. Proven leadership in managing international development teams and establishing agile processes (Scrum, DevOps).
Skills
- Rest Api
- Mobile Applications
- Continuous Integration And Continuous Delivery (Ci/Cd)
Languages
Education
FH Bielefeld
Diploma in Engineering (FH) · Electrical Engineering and Information Technology · Bielefeld, Germany
Siemens AG
Apprenticeship as Energy Electronics Technician (Plant Engineering) · Energy Electronics Technician (Plant Engineering)
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Andreas is based in Lage, Germany.
Andreas speaks the following languages: German (Native), Greek (Intermediate), English (Intermediate).
Andreas has at least 24 years of experience. During this time, Andreas has worked in at least 7 different roles and for 5 different companies. The average length of individual experience is 3 years and 8 months. Note that Andreas may not have shared all experience and actually has more experience.
Based on recent experience, Andreas would be well-suited for roles such as: Mobile and Web Portal Full-Stack Development (Freelance), Full-Stack Web Portal Development (Logistics), Backend Modernization (Banking).
Andreas's most recent position is Mobile and Web Portal Full-Stack Development (Freelance).
In recent years, Andreas has worked for Traxon Technologies Europe GmbH.
Andreas is most experienced in industries like Manufacturing, Automotive, and Banking and Finance. Andreas also has some experience in Information Technology, Advertising, and Media and Entertainment.
Andreas is most experienced in business areas like Information Technology, Product Development, and Project Management. Andreas also has some experience in Quality Assurance.
Andreas has recently worked in industries like Manufacturing, Banking and Finance, and Information Technology.
Andreas has recently worked in business areas like Information Technology and Product Development.
Andreas holds a Bachelor in Electrical Engineering and Information Technology from FH Bielefeld.
The availability of Andreas needs to be confirmed.
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Calculated based on our freelancers’ daily rates as of 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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