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Jens (Dr. rer. nat.) Meßinger

Team Lead

Hamburg, Germany
Experience Education Certifications Languages
Experience
Nov 2022 - May 2023
7 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Hamburg, 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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 years
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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 months
Germany

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
Native
English
Advanced
Russian
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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