Jens (Dr. rer. nat.) Meßinger
Team Lead
Experience
Nov 2022 - May 2023
7 monthsGermany
Team Lead
Service (IT, Education)
- Fullstack web development as new build and replacement of existing desktop & web apps for a maker of ERP solutions in education; also analysis and redesign of dev processes and teamwork in distributed teams.
- Team leadership.
- Design, architecture + implementation.
- DevOps, consulting.
- C# & .NET (Asp.Net 7).
- Angular (14), JavaScript/TypeScript.
- OData/REST, partly SOAP.
- Azure DevOps.
- Interfaces to educational providers and authorities.
Sep 2022 - Oct 2022
2 monthsGermany
Senior Developer
Service (IT)
- Feasibility analysis and prototype creation using latest tech in .NET and Angular with focus on mobile clients and embedding into existing app landscape.
- Design, architecture + implementation.
- DevOps, consulting.
- C# & .NET (Asp.Net 6, .NET MAUI & WinUI 3).
- Angular (14), JavaScript/TypeScript.
- MS SQL Server.
- GitHub & Azure DevOps.
Jan 2021 - May 2023
2 years 5 monthsGermany
Senior Developer
Service (Law Firm)
- New development and expansion of existing web apps and services, mainly in law firm management and document management; embedding into a complex existing app landscape (since 09/2022 consulting part-time).
- Design, architecture + implementation.
- DevOps, consulting.
- C# & .NET (Core, Asp.Net 6).
- Angular (11, 12) with Kendo UI for Angular, JavaScript/TypeScript.
- MS SQL Server.
- Azure DevOps.
- Microservices with Docker.
- Complex release management.
Jan 2020 - Mar 2021
1 year 3 monthsGermany
Senior Developer
Medical Devices (Manufacturer)
- New development and porting of existing apps for production data collection as modular web apps, using microservices; communication and data exchange in industrial automation (from 01/2021 part-time).
- Design, architecture + implementation.
- Consulting & coaching (Scrum).
- Microservices with Docker.
- C# & .NET Core (3).
- OPC / OPC UA.
- Oracle DB.
- Kepware KEPServerEX.
- Scrum.
- Meeting GxP/GMP and CSV requirements.
- PoC prototypes with Azure Functions and Azure App Services.
Apr 2019 - Jan 2020
10 monthsGermany
Senior Developer
Medical Devices (Manufacturer)
- Expansion (Delphi, C#) and porting (Delphi → C#) of in-house software for production data collection.
- Architecture + implementation.
- Consulting & coaching (waterfall to Scrum transition).
- C#, .NET, Delphi.
- Oracle DB.
- Waterfall & Scrum.
- Meeting GxP/GMP and CSV (computer system validation) requirements.
Dec 2018 - Mar 2019
4 monthsGermany
Senior Developer
Waste Management
- Migration and reimplementation of in-house ERP+CRM (.NET) to a new architecture focused on cloud (AWS) and microservices.
- Design, architecture, implementation.
- AWS (esp. AWS Lambda).
- OpenID Connect / OAuth 2.
- JavaScript/TypeScript, Angular 7, Bootstrap, NodeJS.
- C# & .NET Core.
- MySQL, MS SQL Server.
- Microservices with Docker.
Oct 2018 - May 2023
4 years 8 monthsHamburg, Germany
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Private Project
- Private project focused on client-server architecture, microservices and combining web app with mobile app; auth via OpenID Connect.
- Design, architecture, implementation.
- REST, OpenID Connect / OAuth 2.
- Server: C# & ASP.NET 6; MS SQL Server.
- Clients: JavaScript/TypeScript + Angular 11 + Ionic 4; WPF.
- Deployment of server components via MS Azure (Azure Functions, App Services).
Aug 2018 - Nov 2018
4 monthsGermany
Senior Developer
Service (IT)
- Client-server system for subcontractors of public transport companies; added a web app to classic desktop software for master data and billing.
- Design, architecture, implementation.
- Client-server architecture.
- REST.
- Server: C#, ASP.NET Core (MVC, Razor); MS SQL Server, Oracle DB.
- Client: JavaScript, HTML5+CSS, Bootstrap.
- Deployment of server components via MS Azure (Azure Functions, App Services).
Mar 2018 - Aug 2018
6 monthsGermany
Senior Developer
Service/Banks
- Client-server system to manage vehicle fleets as an in-house solution using a message broker (RabbitMQ) and a search server (Elasticsearch).
- Implementation.
- Client-server architecture.
- REST.
- Server: C#, ASP.NET; Oracle DB; RabbitMQ; Elasticsearch.
- Client: AngularJS, JavaScript, Bootstrap, HTML5+CSS.
Jan 2018 - May 2018
5 monthsGermany
Sub-Project Lead
Service (IT)
- Server app to provide tenant-specific info and functions via a REST API; incl. client prototype.
- Sub-project leadership.
- Design, architecture, implementation.
- Client-server architecture.
- REST, OAuth 2.
- Server: C#, ASP.NET Core; MS SQL Server.
- Client: Angular 2+, Ionic 2+, TypeScript, Bootstrap, HTML5+CSS.
- Deployment via MS Azure (Azure Functions, App Services).
Nov 2016 - Sep 2017
11 monthsGermany
Sub-Project Lead
Service (IT)
- Mobile apps with dynamic content for service providers and a server app; content is offline but can sync server-side (mostly part-time).
- Sub-project leadership.
- Design, architecture, implementation.
- Client-server architecture, REST, OAuth 2.
- Server: C#, ASP.NET WebApi2; MS SQL Server.
- Client: Angular 2+, Ionic 2+, TypeScript/JavaScript, Bootstrap, HTML5+CSS.
Mar 2016 - Apr 2016
2 monthsGermany
Coach and Consultant
Service (IT)
- Scrum workshop and coaching for a mid-sized IT company.
- Basics of Scrum and agile transformation of dev process including coaching of team and leadership.
Jan 2016 - Dec 2017
2 yearsGermany
Senior Developer
Machinery (Manufacturer)
- Distributed workstation system for service techs as client-server with service-oriented architecture; supports Windows desktop and mobile clients using various tech (full and part-time).
- Design, architecture, implementation.
- Consulting & coaching (Kanban; automated testing).
- Client-server architecture.
- REST.
- C#, ASP.NET WebApi2 (partly Core), WPF & UWP.
- MS SQL Server.
- Deployment via MS Azure (App Services, VMs).
- Project management: Kanban.
Nov 2014 - Apr 2017
2 years 6 monthsGermany
Coach and Consultant
Service (IT)
- Several one- and multi-day Scrum workshops for a mid-sized IT firm and its dealers (SMEs).
- Basics of Scrum.
- Scrum with external clients.
- Custom agile management for small teams and non-continuous projects.
Jun 2013 - Dec 2015
2 years 7 monthsGermany
Senior Developer
Machinery (Manufacturer)
- New development of a workstation system for service techs as a local client app to a SAP ERP.
- Implementation, architecture.
- Consulting & coaching (e.g. Scrum + agile methods; automated testing).
- VB.NET, WPF (layouts, custom components), MVVM.
- MS SQL Server.
- Multi-layer architecture.
- Project management: Scrum.
Feb 2013 - May 2013
4 monthsGermany
Senior Developer
Service (IT, Media)
- Highly modular framework for creating electronic publications online and offline.
- Design, base structure implementation.
- .NET (C#, VB.NET).
- Extensive interface definitions and plugin system to integrate varied modules.
- Heavy use of agile methods.
May 2012 - Nov 2012
7 monthsGermany
Project Lead
Geophysics, Geotechnics, Structural Diagnostics
- Software for automated processing and analysis of ground radar data for structure ID and parameter extraction; defined physical and measurement requirements.
- Project leadership.
- Architecture, implementation.
- Delphi.
- Import interfaces for various hardware data formats.
- Project management: iterative classic within iterations.
Jan 2011 - May 2011
5 monthsGermany
Sub-Project Lead
Medical Tech; Physics
- Highly scalable framework for signal analysis and processing; key part was flexible interfaces to link to customer’s existing and new software.
- Coordination with external developers.
- Coaching (agile methods).
- Sub-project leadership.
- Architecture, design, implementation.
- Documentation.
- Delphi.
- Strong modular design, use of patterns, extensive interfaces.
- Project management: iterative with agile methods.
Jan 2010 - Apr 2010
4 monthsGermany
Sub-Project Lead
Medical Tech; Physics
- Highly scalable framework for signal analysis and processing; key part was flexible interfaces to link to customer’s existing and new software.
- Coordination with external developers.
- Coaching (agile methods).
- Sub-project leadership.
- Architecture, design, implementation.
- Documentation.
- Delphi.
- Strong modular design, use of patterns, extensive interfaces.
- Project management: iterative with agile methods.
Jan 2007 - May 2023
16 years 5 monthsGermany
Consultant
Service (IT, Media)
- Consulting and concept design for IT products at a mid-sized publisher (repeated as needed).
- Work as merabit.
- Shaping dev processes with agile principles.
- Deployment and release planning.
- Tech focus on distributed apps and mobile clients.
Languages
German
NativeEnglish
AdvancedRussian
Elementary Education
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Diploma in Geophysics · Geophysics
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Dr. rer. nat. · Geophysics
Certifications & licenses
Professional Scrum Master
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