Rolf Jansson Holtermann

Rolf Jansson Holtermann

Founder and CEO, Programmer, IT and Game Development Consultant

Experienced IT professional with 25+ years in the industry, specializing in game development, virtual worlds, and high-performance systems. Co-creator of Wurm Online with Markus "Notch" Persson.

Areas of Expertise

Focus Areas

  • System and Web Development (C#, .NET, Java)
  • IT Project Management
  • System Architecture
  • Code Review & Problem Solving
  • Recruitment
  • Change Management

Core Competencies

  • Leadership, Inspiration & Motivation
  • High-Performance Mass User Systems
  • Game & Simulator Development
  • Code Optimization
  • Agile Methods (Scrum, Kanban)
  • PR & Marketing

Primary Technologies

  • C#, .NET, Java, JavaScript, SQL
  • Unity 3D, VR Development, Android
  • HTML, CSS, Razor Pages, MVC, REST
  • Windows Server, Linux, AWS, Azure, Docker
  • SQL Server, MySQL, SQLite
  • Git, Perforce, Unity SCM

Professional Experience

Aug 2022 - Present
Programmer
Resolution Games, Linköping

Further development on a multitude of VR titles ranging from Bait!, one of the world's most downloaded VR games where I expanded the game with more content and added multiplayer functionality, to the recently released Battlemarked (2025). Other titles include Demeo, Blaston, Cook-Out, and Acron. I learnt and practiced many game development best practices in the process.

C# Unity VR Multiplayer
May 2019 - Aug 2022
CEO & Lead Developer
Camp Creation AB, Motala

Development of prototypes for massive virtual worlds in Unity 3D and .NET. Work resulted in a highly efficient multi-threaded streaming engine with proprietary voxel terrain. Began converting the server environment to Microservices and experimented with Blazor and Azure.

Also started development on Prophecy, a financial market analysis platform using machine learning to predict stock indices, and Yatzingo, a multiplayer bingo-like mobile game available on Google Play. Both went live in 2025.

C# .NET Unity 3D Azure Docker
2007 - 2019
CEO & Lead Developer
Code Club AB, Motala

Together with Markus "Notch" Persson, created Wurm Online - a virtual universe with a fantasy theme. The game was groundbreaking as the first commercial Java 3D game, for its streaming solution, and as a pioneer in the sandbox and survival genre. Ranked #3 Best MMO by PC Gamer (2016) and #56 Best PC Game of All Time (2011). Led the company through 12 years generating approximately 50 million SEK in revenue with about 8 employees and 50 volunteers. Achieved UC Gold status in 2017.

Java MySQL Linux 3D Engine
2004 - 2007
Network Technician & Web Programmer
Lithoteknik AB, Motala

Responsible for the Windows-based network at the printing company with approximately 20 employees. Also developed a C# .NET Content Management System sold to customers such as Vaderstad AB and Roche under the name Molitho.

C# .NET SQL Server
2000 - 2003
Network Technician & Programmer
Gamefederation AB, Stockholm

Development of a Java-based system for game matching between different gaming platforms, including mobile devices and PC. Work involved server programming in a message-based system.

Java EE EJB Hibernate
1997 - 2000
Consultant & Network Technician
Guide Integration AB & Skandia IT/IBM, Stockholm

Various assignments focused on IT security and system administration at companies including AGA, Lansforsakringar, and Skandia IT. Later operation and maintenance of Skandia Secure Network Platform (SSN), the central firewall solution for the entire Skandia group.

Sun Solaris Firewall VPN Security