Projects and professional experience

My Career in the World of IT

I have acquired my extensive experience and knowledge through several professional positions and projects. Here I would like to give you a brief insight into my profile and my previous projects.

Success Stories

Get an insight over my recent projects and how the customer has benefited.

Customer portal showing first step of an up-to five-step relocation process.

Development of a Relocation Notification in a Customer Portal

Up to now, reporting relocations has been an analog process and does not fit in with the company’s strategic digital orientation. Read here how it was solved.
Render image of a cloud containing servers that are connected to a client system via a network.

Containerization of Microservices for Deployment in the Cloud

The services previously hosted in-house are to be provided in the cloud in future. Read here how the problem was solved in this project.
iMac showing the digital inbox page of the customer portal. The inbox contains at least three invoices and there is an option to load more documents.

Implementing a Modern Digital Mailbox for a Customer Portal of an Energy Supplier

The migration of the customer portal to a new environment requires a new solution for the digital delivery of invoices. See here how the implementation went.
MacBook displaying LEW customer portal menu showing different functions.

Migration of the Customer Portal of a Regional Energy Supplier

As part of a cross-functional team between sales, customer service, SAP and web development, a platform for digital customer processes should be developed.


Get an insight into how customers, partners and colleagues rate working with me.

Mr. Wazulek has achieved the desired goals and thus contributed significantly to the success of the company. All assigned tasks were completed with great care and to our complete satisfaction. We would like to thank him once again for this. We have come to know Mr. Wazulek as a cooperative and very reliable freelancer. He impressed us with his flexibility and his communicative and open manner right from the start of the job. Mr. Wazulek provided us with a flawless result and was able to respond systematically to special requirements.

For the above reasons, we consider Mr. Wazulek to be a highly qualified service provider for web development projects and would like to recommend him to potential clients without any reservations.

Nicolas is an innovative software developer who excels with his customer and solution-oriented work.
Over the past four years, Nico has worked with me on the new and further development of the LEW Group’s websites and private customer portal. Nico was responsible for the creation of scalable concepts for connecting the backend systems and the technical implementation of interfaces to other systems such as SAP. In addition to his extensive technical skills, Nico showed particular pleasure in teaching and a talent for communicating highly complex technical content in a natural language, which made him a valuable member of the cross-functional team and a very committed training officer for the IT trainees at LEW.

Nicolas was a very helpful and reliable colleague and the collaboration with him was always cooperative and result-oriented. I would therefore recommend him.

Thanks to his excellent comprehension skills, he always familiarized himself with new areas of responsibility extremely quickly, was versatile and always had a complete overview of even the most difficult contexts. Nicolas Wazulek always showed a high level of initiative and always identified fully with his tasks and our company. His great enthusiasm should be particularly emphasized. Even in situations with a high workload, he always proved to be particularly resilient.

Nicolas Wazulek acted calmly, deliberately, purposefully and with the utmost precision at all times. At the same time, he consistently impressed with his high quality of work, both in terms of quality and quantity. Nicolas Wazulek was always characterized by his extraordinary reliability.


Part of my doings is the participation as volunteer.

As an examiner since December 2023 at the Swabian Chamber of Industry and Commerce (IHK Schwaben), I take care of the intermediate and final exams for trainees in Computer Science Expert Application Development and Computer Science Expert Data & Process Analysis.

My Professional Experience in the Industry


Freelance Information Technology Lecturer / Mischok Academy / November 2023 – Present

As a freelance lecturer, I train new IT specialists and developers to counteract the shortage of skilled workers. I always teach the basics of the profession with a focus on practical application.

Freelance Software Engineer Backend (C#/.NET) / niwadev / April 2022 – Present

In the backend, I develop with C# and the current, cross-platform .NET version. With my extensive expertise in the development of REST API microservices or gRPC endpoints, I help my customers to develop future-proof solutions. By using message bus systems (e.g. Azure Service Bus) via the NServiceBus framework, I model processes in such a way that they can be repeated in the event of an error. The integration of Azure SaaS services ensures better scalability and simpler development. To store information, I use the NoSQL database Azure Cosmos DB or relational databases such as MSSQL or MySQL. In the cloud environment, the containerization of services has become indispensable. Therefore I use Docker.


Software Engineer (C#/.NET) / LEW Service & Consulting GmbH / June 2019 – October 2023

Focus on API backend development in C# .NET Core including connections to SAP OData services. Developing REST based microservices using Azure cloud technologies and Docker. As a training officer, I supervise the trainees in our department.
Working in a SCRUM team to implement new features on the LEW website and the customer portal. Using Sonarqube to continuously improve the code base.

SAP Developer / LEW Service & Consulting GmbH / December 2016 – June 2019

Frontend development of a web-based project management solution for construction and maintenance work on the power grid. Primary use of SAPUI5 and Fiori with JavaScript. I worked in a SCRUM team. Setup and continuous maintenance of the version control system and the CI/CD pipelines.

System Administrator / LEW TelNet GmbH / July 2016 – December 2016

Administration of the Windows server systems for the building security and media technology department. Development of an ASP.NET application in C# for the administration of visitor badges.


Computer Science Expert (Subject Area: System Integration) / LEW Verteilnetz GmbH / September 2013 – July 2016

Training in the field of IT to learn all the basics in this area. This includes:

  • Fundamentals of network technology
  • Fundamentals of software development (with Java and C#)
  • Fundamentals of system administration
  • Fundamentals of business administration

Graduated as the best trainee in this area with 94 out of 100 points.

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