# Elmar Klausmeier

> Professional programmer and consultant


## Now

- Integrating GUPTRI in stabregion4
- Implementing eTendler formulas into TENDLER
- Performance measurement of TENDLER


## Skills

- Developer experience
- UNIX administration
- IT in banking
- Project management


## Stack

- C, C++, Fortran, COBOL, Lua, Perl, PHP, Java
- Oracle, Sybase, SQLite
- Linux, Solaris, AIX


## Writing

- [Mainframe Rehosting](https://eklausmeier.goip.de/blog/2011/08-14-mainframe-rehosting)
- [On Differential Forms](https://eklausmeier.goip.de/blog/2015/03-15-on-differential-forms-2)
- [Tendler-like Formulas for Stiff ODEs](https://eklausmeier.goip.de/blog/2026/01-20-tendler-like-formulas-for-stiff-odes)


## Links

- [GitHub](https://github.com/eklausme)
- [Twitter](https://x.com/eklausmeier)
- [Blog](https://eklausmeier.goip.de/blog)
- [E-mail](mailto:Elmar.Klausmeier@gmail.com)


## Preferences

- Communications: e-mail
- Timezone: Berlin