lthms' avatar, a hand drawing looking person, wearing a headset, close to a window on a raining night

Hi, I’m Thomas Letan (lthms) (he/him).

You read something which caught your attention? Don’t hesitate to shoot me an email.


The Chaotic Debut of My Software Projects (

I am no stranger to the exciting feeling of starting new projects. By dint of repeating this “exercise” over the years, I have come to build an intuitive process which “works for me.”

Monad Transformers are a Great Abstraction (

Monads are hard to get right, monad transformers are harder. Yet, they remain a very powerful abstraction.