Johannes Knörzer - Software Developer

Q: Where is Johannes based?

Johannes is based in Altdorf bei Nürnberg, Germany .

Q: What languages does Johannes speak?

Johannes speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Johannes have?

Johannes has at least 19 years of experience. During this time, Johannes has worked in at least 7 different roles and for 7 different companies . The average length of individual experience is 2 years and 7 months . Note that Johannes may not have shared all experience and actually has more experience.

Q: What is Johannes's latest experience?

Johannes's most recent position is Software Developer at Hoffmann Engineering Services GmbH .

Q: What companies has Johannes worked for in recent years?

In recent years, Johannes has worked for Hoffmann Engineering Services GmbH , Goldbeck GmbH , and IQ-optimize Software AG .

Q: Which industries is Johannes most experienced in?

Johannes is most experienced in industries like Information Technology (IT) , Government and Public Administration , and Telecommunication . Johannes also has some experience in Aerospace and Defense , Construction , and Manufacturing .

Q: Which business areas is Johannes most experienced in?

Johannes is most experienced in business areas like Information Technology (IT) , Quality Assurance (QA) , and Product Development . Johannes also has some experience in Project Management and Operations .

Q: Which industries has Johannes worked in recently?

Johannes has recently worked in industries like Information Technology (IT) , Telecommunication , and Construction .

Q: Which business areas has Johannes worked in recently?

Johannes has recently worked in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Recommended expert

Altdorf bei Nürnberg, Germany

Experience

Mar 2024 - Dec 2025

1 year 10 months

Germany

Software Developer

Hoffmann Engineering Services GmbH

Software development
Technical design of software architecture and design (considering functional and non-functional requirements)
Frontend and backend
Refactorings
Code reviews
Unit tests
Automated integration tests
E2E tests

Global Identity Services (GIS) is the identity provider for the Digital Services Platform (DSP). The GIS are responsible for authenticating and authorizing end users and other DSP services by issuing security tokens. This includes:

Management of identities (e.g., user registration, password reset and change, user profiles)
Management of roles and permissions
Single sign-on (SSO) across DSP services
Management of OAuth resources and terms and conditions (T&C)

Sep 2023 - Dec 2023

4 months

Germany

Software Developer

Goldbeck GmbH

Software development
Technical design of software architecture and design (considering functional and non-functional requirements)
Frontend and backend
Refactorings
Code reviews
Unit tests
Automated integration tests

RBAC (Role Based Access Control) is an application that enables role-based access control for registered applications and their users within Goldbeck. It uses Microsoft Entra ID/Azure Active Directory role data, permissions, and users.

Jan 2022 - Jun 2023

1 year 6 months

Nuremberg, Germany

Software Developer, Software Architect

IQ-optimize Software AG

Software development
Technical design of software architecture and design (considering functional and non-functional requirements)
Frontend and backend
Refactorings
Code reviews
Unit tests
Automated integration tests
Performance analysis and optimizations

The goal is the introduction of Drillisch landline products (DSL), including product ordering, tariff change, and cancellation. Integration of external services (1&1 AG, SPRI, WBCI) and import of structured data from Deutsche Telekom via batch for availability checks.

Nov 2020 - Nov 2020

1 month

Erlangen, Germany

Software Architect

Mitsubishi Heavy Industries Europe Digital Solutions

See project GCCP (Global Communication and Control Platform) from 12.05.2020 to 31.10.2020

May 2020 - Oct 2020

6 months

Erlangen, Germany

Software Architect

Mitsubishi Heavy Industries Europe Digital Solutions

Documentation (based on arc42) and further development of software architecture and design
Frontend and backend
Evaluation of tools, frameworks, and libraries
Code reviews and concept reviews
Software development and refactorings
Unit tests and automated integration tests for four SCRUM teams (technical lead)
Planning and interaction at management level

GCCP (Global Communication and Control Platform) combines CCTV and PIS to monitor critical infrastructure and to inform passengers (current/next station, advertising) in stations, trains, and buses. Time series data is collected, analyzed and stored.

May 2018 - Apr 2020

2 years

Nuremberg, Germany

Software Architect and Deputy Project Manager

IT-Systemhaus der Bundesagentur für Arbeit

Technical conception of software architecture and design (considering functional and non-functional requirements)
Project and task planning
Design reviews
Frontend and backend
Code reviews
Prototyping
Unit tests and automated integration tests for two SCRUM teams (functional leadership)
Planning and interaction with stakeholders

Migration of the Identity Management System (One Identity Identity Manager) from version 6 to 8. Reimplementation of the IT shop with Angular and TypeScript. Migration of structured data (> 100 GB).

Nov 2017 - Apr 2018

6 months

Frankfurt, Germany

Software Developer

Condor Flugdienst GmbH

Software development
Refactorings
Code reviews
Unit tests and automated integration tests
Backend development

Design and implementation of microservices (REST) to synchronize flight and airport data from Netline and Sabre via SOA web service and database integration.

Jul 2017 - Nov 2017

5 months

Nuremberg, Germany

Software Developer/Development Lead

IT-Systemhaus der Bundesagentur für Arbeit

Technical conception of software architecture and design (considering functional and non-functional requirements)
Software development (frontend and backend)
Refactorings
Code reviews
Unit tests

Maintenance, further development and redesign of an adapter to transform the interface of a legacy system into the Enterprise Output Management System, with a web application for adapter configuration.

Jan 2016 - Jun 2017

1 year 6 months

Nuremberg, Germany

Software Developer

DATEV eG

Technical contact person for 48 interface partners (plugin suppliers)
Performance analyses and optimizations
Software development
Refactorings
Concept validation (proof of concept/prototypes)
Code reviews
Unit tests
Automated UI tests
3rd level support

The DATEV Arbeitsplatz is the central entry product for DATEV users and enables access to functions of various specialist applications.

Nov 2014 - Dec 2015

1 year 2 months

Nuremberg, Germany

Development Lead

IT-Systemhaus der Bundesagentur für Arbeit

Evaluation of software architecture, design, and implementation, proposing optimization measures
Technical conception of software architecture and design
Concept validation (proof of concept/prototypes)
Design and code reviews
Software development (frontend and backend)
Refactorings
Unit tests and automated integration tests
Build management
3rd level support
Functional leadership, planning and interaction with stakeholders and other teams

BAB/Reha.NET manages vocational training grants and rehabilitation measures with interfaces to various specialized systems.

Jun 2006 - Jul 2007

1 year 2 months

Nuremberg, Germany

Software Developer

IT-Systemhaus der Bundesagentur für Arbeit

Implementing an application to synchronize Active Directory forests
Exporting forests to XML and importing into Active Directory
Backend development

MODex2007 is an Identity and Access Management System for managing roles, user, and property data.

Sep 2005 - Oct 2014

9 years 2 months

Nuremberg, Germany

Development Lead, Software Developer

IT-Systemhaus der Bundesagentur für Arbeit

Technical planning of software architecture and design
Concept validation (PoC/prototypes)
Concept and code reviews
Software development (frontend and backend)
Refactoring
Unit tests and automated integration tests
Load and performance tests
Build management
2nd and 3rd level support
Planning and interaction with stakeholders and other teams

BK-Text is an Enterprise Output Management System for managing, controlling, executing, and post-processing templates and documents.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (16.5 years), Government and Administration (12.5 years), Telecommunication (1.5 years), Construction (0.5 years), and Aerospace and Defense (0.5 years).

Information Technology

Government and Administration

Telecommunication

Construction

Aerospace and Defense

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (18.5 years), Quality Assurance (6 years), Product Development (5 years), Project Management (2.5 years), and Operations (1 year).

Information Technology

Quality Assurance

Product Development

Project Management

Operations

Summary

My focus is on software architecture, design and development of complex distributed systems with .NET and TypeScript. I place great value on achieving high quality and fulfilling customer requirements as best as possible. In the team, I use clean code development, automated tests, refactorings, code reviews, and targeted, up-to-date documentation.

I really enjoy learning and trying out new things – both in terms of subject matter and technology. I also like sharing my knowledge with team members and appreciate constructive feedback to continuously improve.

Skills

Operating Systems

Windows Xp, 7, 8.1, 10, 11
Windows Server 2008-2019
Ubuntu Linux 18.04

Programming Languages

Microsoft .Net Framework 2.0-4.6.1, Core 2.2-3.1, 6, 8, 9 (C#, Vb)
Visual Basic 6
Vba (Word)
Typescript
Java (Jdk 17/21)
Powershell

Data Formats

Xml
Json
Yaml

Technologies / Libraries / Frameworks

Plinq/linq
Mstest
Nunit
Xunit
Fluentassertions
Uml
Multithreading (Threads, Tasks (Tpl), Concurrent Collections)
Wcf + Soapcore
Soa (Webservices)
Rest
Graphql
Openapi/swagger: Swashbuckle, Nswag
Odata
Sql
Angular 8+13 (With Angular Material)
Vue.js 2 (With Vuetify)
Next.js 13/14/15
React 18/19
Html5
Css3 (Scss)
Tailwind Css
Ngrx
Rxjs
Devextreme Components For Angular
Jasmine
Jest
Selenium
Cypress
Playwright
Windows Forms
Com
Ado.net
Msbuild/teambuild
Log4net
Serilog
Elk Stack
Moq
Asp.net Webforms
Asp.net Core Web Api 2.2-3.1, 2, 6, 8, 9
Asp.net Core Mvc 2.2
Asp.net Core Signalr 2.2-3.1
Blazor Server
Grpc
Entity Framework .Net Framework/core 2.2-3.1, 6, 8, 9
Unity Ioc
Automapper
Polly.net
Fluentvalidation
Certificates / Sso
Openid Connect (Oidc)
Oauth 2.0
Jwt
Identityserver 4
Quartz.net
Ldap (And Active Directory)
Spring Boot 2/3

Databases

Microsoft Sql Server 2000-2016
Microsoft Access 2000-2007
Mongodb (Atlas) 5/6/7
Mariadb
Influxdb
Mysql 5.7+8.0

Application Servers

Iis 7-10
Kestrel

Virtualization / Networking / Infrastructure

Docker
Docker-compose
Kubernetes
Podman
Nginx
Rabbitmq (Messaging)
Masstransit (Messaging)

Cloud

Microsoft Azure
Azure Active Directory (Aad)/microsoft Entra Id
Azure Sql Database
Azure Database For Postgresql 14 - Flexible Server
Microsoft Graph Api
Azure App Service
Azure Kubernetes Service (Aks)
Microsoft Identity Platform With Msal (Microsoft Authentication Library)
Azure Key Vault
Azure Container Registry (Acr)

Tools

Gitlab
Azure Devops
Microsoft Team Foundation Server (Tfs) 2010-2015 (Source Control, Build Management, Work Item Tracking)
Visual Studio Team Services (Vsts)
Jenkins
Svn
Microsoft Visual Studio 2005-2022
Visual Studio Code
Mid Innovator
Serena Business Mashups
Bmc Action Remedy System
Jira
Microsoft Visual Source Safe 2005
Resharper
Soapui
Enterprise Architect
Sonarqube/sonarcloud
Eclipse
Git
.Net Memory Profiler
Windbg
Debugdiag
Speedtrace
.Net Runtime Analyzer
Visual Studio Performance Profiler
Hashicorp Vault
Graylog
Prometheus
Grafana
Refit
Wibu Systems Codemeter
Slack
Confluence
Microsoft Project 2016
Microsoft Teams
Strapi Cms 4/5
Intellij
Figma

Methods

Scrum
Ooa And Ood (Technical Design)
Clean Code Development
Unit Tests, Automated Integration Tests
Test Driven Design (Tdd)
Itil
Microservices
Domain Driven Design (Ddd)
Continuous Integration
Continuous Delivery
Architecture And Design Patterns
Technical Design (Software Architecture And Design)

Standard Software

Microsoft Sharepoint 2013-2019, 365
One Identity Identity Manager Version 6/8
Microsoft Office 2000-2019, 365
Microsoft Visio 2007-2013, 365

Languages

German

Native

English

Advanced

Education

Oct 2008 - Nov 2014

FernUniversität in Hagen

Bachelor of Science in Computer Science · Computer Science · Hagen, Germany · Very good (1.5)

Mar 2007 - Jul 2008

Telekolleg

Technical College Entrance Qualification · Business · Nuremberg, Germany · Very good (1.5)

Sep 2001 - Jul 2004

Berufliches Schulzentrum für Wirtschaft und Datenverarbeitung

Training as IT Specialist for Application Development · IT Specialist for Application Development · Würzburg, Germany · Good (2.0), IHK exam: Good (90 points)

...and 1 more

Certifications & licenses

Isaqb Cpsa-A (International Software Architecture Qualification Board Certified Professional For Software Architecture - Advanced Level)

Isaqb

Microsoft Technology Specialist: .Net Framework 4, Service Communication Applications

Microsoft

Microsoft Certified Professional (Mcp) Microsoft Specialist: Programming In C#

Microsoft

Isaqb Cpsa-F (International Software Architecture Qualification Board Certified Professional For Software Architecture - Foundation Level)

Isaqb

Profile

Created

July 2025

Last Update

September 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Johannes based?

Johannes is based in Altdorf bei Nürnberg, Germany.

What languages does Johannes speak?

Johannes speaks the following languages: German (Native), English (Advanced).

How many years of experience does Johannes have?

Johannes has at least 19 years of experience. During this time, Johannes has worked in at least 7 different roles and for 7 different companies. The average length of individual experience is 2 years and 7 months. Note that Johannes may not have shared all experience and actually has more experience.

What roles would Johannes be best suited for?

Based on recent experience, Johannes would be well-suited for roles such as: Software Developer, Software Developer, Software Architect, Software Architect.

What is Johannes's latest experience?

Johannes's most recent position is Software Developer at Hoffmann Engineering Services GmbH.

What companies has Johannes worked for in recent years?

In recent years, Johannes has worked for Hoffmann Engineering Services GmbH, Goldbeck GmbH, and IQ-optimize Software AG.

Which industries is Johannes most experienced in?

Johannes is most experienced in industries like Information Technology (IT), Government and Public Administration, and Telecommunication. Johannes also has some experience in Aerospace and Defense, Construction, and Manufacturing.

Which business areas is Johannes most experienced in?

Johannes is most experienced in business areas like Information Technology (IT), Quality Assurance (QA), and Product Development. Johannes also has some experience in Project Management and Operations.

Which industries has Johannes worked in recently?

Johannes has recently worked in industries like Information Technology (IT), Telecommunication, and Construction.

Which business areas has Johannes worked in recently?

Johannes has recently worked in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

What is Johannes's education?

Johannes holds a Bachelor in Computer Science from FernUniversität in Hagen.

Does Johannes have any certificates?

Johannes has 4 certificates. Among them, these include: Isaqb Cpsa-A (International Software Architecture Qualification Board Certified Professional For Software Architecture - Advanced Level), Microsoft Technology Specialist: .Net Framework 4, Service Communication Applications, and Microsoft Certified Professional (Mcp) Microsoft Specialist: Programming In C#.

What is the availability of Johannes?

Johannes is immediately available for suitable projects.

What is the rate of Johannes?

Johannes's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.