I create theoretical models for mixed integer linear programming, implemented in languages like:
- Python
 - C++
 - Matlab
 - Gams
 - Cplex IDE
 - Excel
 - Lingo
 - Lindo
 
Solvers like:
In modeling languages like:
- Pyomo
 - Scipy
 - Cplex
 - Ortools
 - Pulp
 
For Excel projects I can also make code for Visual Basic and create Add-ins to smooth the process of any optimization.