Freelancer profile translated to English.
Back to original languageAbout Jan
With over a decade of experience in software development and extensive expertise in .NET (C#), Azure Cloud, and SpringBoot (Java), I am an expert in the design and implementation of modern microservice architectures and cloud solutions. As a technical leader and architect, I combine deep technical knowledge with agile methodologies such as Scrum and Kanban to realize high-quality, scalable, and secure software solutions. My strengths lie in developing technical concepts, quickly understanding complex business requirements, and fostering cross-team collaboration for successful projects.
German
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Deutscher EnergiekonzernSoftware Architect, Senior Fullstack DeveloperENERGY AND UTILITIESMay 2025 - Today (1 year and 1 month)Activities• Architecture, development, and DevOps of a preprocessing solution for theinvoice processing workflow within the DocProStar platform• Gathering and prioritizing business requirements with the business unit, managing in the Kanbanboard (Azure DevOps)• Bi-weekly meetings, results demos, and iteration planning with stakeholders• Connecting Exchange Online mailboxes and SharePoint lists via the Microsoft Graph API• Quality assurance through automated end-to-end testsTechnologies/Methodologies• .NET / C# / Git• Azure DevOps / Kanban• DocProStar (TCG Process) – Platform for Intelligent Document Processing (IDP)• Microsoft Graph API / Exchange Online / SharePoint Online• xUnit• Clean Architecture / Clean Code• arc42
- Sinc GmbH / UmweltbundesamtLead DeveloperPUBLIC SECTORApril 2024 - March 2025 (11 months)Leipzig, SN, GermanyActivities
- Development of the single-use plastic fund platform based on a scalable microservice architecture
- Lead role in creating technical concepts and conducting EventStorming workshops
- Automated tests (unit, integration, end-to-end, load)
- Code quality assurance through Clean Code principles, peer reviews, and pair programming
- Integration of Azure Services
- Setup and optimization of CI/CD pipelines
- Agile software development according to Kanban
- Close collaboration and knowledge transfer with the team and Product Owner
- Active participation in the recruiting process as a technical interviewer
Technologies/Methodologies- Clean Architecture / Vertical Slices
- ASP.NET Core / .NET Core 8 / C#
- PostgreSQL / EF core
- REST / gRPC
- AMQP / RabbitMQ / Azure Service Bus
- xUnit / WebApplicationFactory / TestContainers / Playwright / k6
- Azure Cloud / Storage Account / Container Apps / Azure Function
- Azure DevOps / Azure Pipelines (YAML) / Helm
- arc42
- DDD / EventStorming
- Kanban
- Sinc GmbH / Bundesamt für StrahlenschutzSoftware Architect, Lead Developer, DevOps EngineerJanuary 2023 - March 2024 (1 year and 2 months)Activities
- Responsibility for the implementation of a future-proof web application considering high security and data protection requirements
- Requirement analysis and gathering, development of architectural concepts, as well as planning and documentation
- Management and mentoring of the development team, ensuring code quality, architectural decisions, and adherence to project goals
- Automated tests (unit, integration)
- Setup and continuous optimization of a robust CI/CD process in Azure DevOps, including the management of environment stages in Kubernetes
- Agile software development according to Scrum
- Main point of contact for technical questions and requirements from the client side
Technologies/Methodologies- Clean Architecture
- Spring Boot / Maven / Java
- PostgreSQL / Oracle / Hibernate / JPA
- REST / OpenApi / SAML
- jUnit / SpringBootTest / TestContainers / Playwright
- Kubernetes / Rancher
- Azure DevOps / Azure Pipelines (YAML) / Helm
- SonarQube
- arc42
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Education
- Master of EngineeringHochschule Nordhausen University of Applied Sciences2014Master of Engineering - MEng, Systems Engineering
- Bachelor of EngineeringHochschule Nordhausen University of Applied Sciences2012Bachelor of Engineering - BE, Technische Informatik
Certifications
- Microsoft Technology Associate (MTA)Microsoft2018
- iSAQB CPSA - Foundation Levelbrightest2024