I used to work in computer algebra, but I've moved on to a poistion in the tech sector. Languages / packages I am fairly proficient in, or was at one point:

• Ada
• C
• C++
• Eiffel
• Java
• Kotlin
• LaTeX
• Modula-2
• Modula-3
• Oberon
• Pascal (Turbo variant)
• Python
• Sage

I invented the Recursive Divider algorithm, but since it wasn't part of my main research thread I merely wrote it up on Wikipedia and forgot about it