Interesting fact that most people might not know - Jet.com is powered by .NET specifically F#!
At the very least, you know that Microsoft products are going to be rock-solid (since they power so many massive companies).
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If I've left a company out, please share!
If you aren't going to use that many server resources that quickly, it doesn't matter whose free money you take.
But I have heard some about the software hiring practices at Jet and what I've heard makes me highly skeptical that they could actually be using proper functional programming techniques. It's disappointing -- someone using F# because it's vaguely "better C#" -- similar to people using Scala or Clojure because it's "better Java".
Sometimes I think they heavy advertisements ("Hey look we're so cool we use functional programming") is more meant to sucker people in under the belief that once the business stabilizes, it will be some sort of Bell Labs of ____ where the company will really try to invest in high-end software solutions and research, and that a lot of it will be carried out with functional programming.
But the reality is that it's more of just a hiring tactic and a tech status grab. Maybe you can convince people on the fringe of functional programming to accept less pay for the lure of getting to learn a functional language? Maybe it's worth it if you get on-average higher quality developers because of the affinity for vague association with functional programming?
Of course it's possible that they really do use F# and that the overall system has been architected well with functional principles. I don't get that sense from the linked blog post or from the overall progress of their online services.
Maybe you can convince people on the fringe of functional programming to accept
less pay for the lure of getting to learn a functional language? Maybe it's worth it
if you get on-average higher quality developers because of the affinity for vague
association with functional programming?
It really opened my eyes to the fact that when someone claims their team uses "exclusively functional programming" that person actually may not even know what immutability or algebraic data types are. I had always been working on an assumption before that there was a vague correlation between wanting to work with functional techniques and being a quality-minded engineer -- but my experience after getting a job from a place that posted on Functional Jobs totally changed that. I try to be way, way more skeptical now, which is why I am quite skeptical that Jet is using F# more as a hiring trick than as a true engineering ethos.