Jeroen H. Opmeer

As a developer with over 8 years of .NET C# experience, my primary focus is on developing applications using the .NET ecosystem. I specialize in back-end development, leveraging technologies like MS SQL Server for data storage and retrieval. I also have extensive knowledge and experience in working with REST APIs, WCF, and ASP.NET. On the front-end, my main experience lies in developing WinForms applications, but I also possess expertise in, HTML, CSS, and PHP.

• I can design the architecture of your Java system. Including large distributed systems
• I can evaluate and modernize the architecture of outdated systems
• I can setup your initial project structure with all the configurations for security, databases and test frameworks
• I can develop the backend functionality
• I can design and setup your database structure
• I can design and setup your front end application
• I can lead and coach other developers, including teams of senior developers
• I can work as a consultant direct with the end client to identify the requirements for a system that will support your business

My ideal project is a greenfield project where I am working on the application architecture and development. I prefer long running projects and as a preference I enjoy working in a small Dutch spoken team. I have more experience as a backend developer but I also enjoy some front end and database work.

I have a strong focus on quality. Not only regarding the code but also documentation and testing. I am used to working as one of the senior developers and resolving complex problems without needing to rely on others.

Due to having spent more than 8 years working as a developer I have gained experience with a large number of technologies used on a number of diverse projects and environments. This puts me in an ideal position to determine what technologies are available and what combination will provide the best results for a given project.

Solera Netherlands BV | Technical Lead

2021 - 2023

Spearheaded the development and maintenance together with the senior developer of cutting-edge software solutions for the automotive industry. Provided mentorship and guidance to junior and mid-level developers, fostering a culture of continuous improvement.

Key Achievements:

Successfully enhanced and extended the existing codebase, introducing new functionalities that elevated the client application's performance and usability. Collaborated with cross-functional teams to ensure seamless integration of client applications with various web-based systems built on ASP.NET.

• Technologies Used:
• Languages: VB.NET, C#
• Backend Services: WCF, REST APIs
• Data Management: MS SQL Server
• Development Framework: .NET 4.x
• Development Tool: Visual Studio 2015/2017/2019
• Testing: Postman

Iberia SA | Back-end Developer

2019 - 2020

My work primarily revolved around the .NET framework, with a focus on C# development. I ensured the efficient storage and retrieval of data using Microsoft SQL Server (MSSQL) while maintaining a robust service architecture through Windows Communication Foundation (WCF) and RESTful APIs.

Key Achievements:

Contributed to the development and maintenance of critical passenger, booking, and luggage handling systems for Spain's national airline, Iberia. Collaborated with a dynamic team to ensure the seamless operation of essential airline functions.

• Technologies Used
• Development Stack: .NET 4.7, C#
• Backend Services: WCF, REST APIs
• Data Management: MS SQL Server
• Development Framework: .NET 4.x
• Development Tool: Visual Studio 2019
• Testing: Postman
• Unit Testing: xUnit

Perceptech BV | Application Developer

2011 - 2016

Key Achievements:

Spearheaded the design and development of a range of cutting-edge C#/.NET 4 applications tailored for central banks during my tenure at a dynamic Dutch startup, Perceptech. Pioneered a pioneering application utilizing scanners to capture and analyze banknote images with a machine learning system, automating the circulation suitability assessment process.

• Technologies Used:
• Development Framework: .NET 4.7, C#
• Front-End: WinForms, HTML/CSS
• Development Tool: Visual Studio 2017

SoftNED CA | Owner, Software Developer, Educator

2006 - 2011

Key Achievements:

Established a successful entrepreneurial venture, SoftNED, specializing in the development of websites and e-commerce solutions tailored to the unique needs of local small businesses. Contributed to the growth of the software development community by providing comprehensive classes to university students in Venezuela.

• Technologies Used:
• Development Stack: Delphi, Apache, PHP5
• Web Technologies: HTML, CSS
• Database Management: MySQL
• Data Modelling: Data normalization

ING Bank NV | Senior System Engineer

1996 - 2006

Key Achievements:

• Spearheaded workplace conversion projects for ING Bank, one of the largest financial institutions in the Netherlands, during a decade of dedicated service.
• Excelled in Windows environment system administration and provided third-line support for office applications.
• Managed multiple locations of a sophisticated financial research system, a Windows-based Lotus Notes/PostgreSQL information sharing platform for financial analysts.

• Technologies Used:
• Operating Systems: Windows NT 3.51, Windows NT 4.0 Server/Desktop, Windows 95/98/2000/XP, Windows Server 2003, Novell 4
• Collaboration Tools: Lotus Notes
• Database Management: PostgreSQL

Amsterdam University of Applied Sciences

Sep 1996 - May 1997

Bachelor in Business Information Systems

MEAO West-Friesland

Sep 1989 - Jul 1992

Intermediate Vocational Education in Economics and Administration

Microsoft MCSE NT 4

1999

Certification number: 3A76B4-4DD93T

Microsoft MCP

1999

Certification number: 9A6654-4F299C

Novell CNA

1999

Core Cloud Services - Azure architecture and service guarantees

2019

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Cloud Concepts - Principles of cloud computing

2019

View Certificate

Core Cloud Services - Introduction to Azure

2019

View Certificate