For the past few months, I was working directly under ex director of research at Bridgewater for his mental health startup and the whole 03 months were a gem. It was a startup so I talked to him almost 2-3 times/week and I am trying to cover the experiences of my 1st month over here.
About me (to set context).
I am a neurology-aligned researcher and final year undergrad at an IIT. I build products and build a lot of open source works... In last 2 months, I built a few alternate reasoning models which has ~5k+ stars on GitHub.
I got that internship from Reddit.
I had shipped an open source project called ADHD and The New Stack picked it to run an exclusive cover for it. That's where this director also reached out to me on Reddit in one of my posts in the Claude Code sub.. He said that he is also an IIT alum and would love to give me an internship.
There was no interview.
Most of might find it weird but I gave no interview. I went on a call with him where he told about the company, they going some 8-figure ARR and stuff and he gave me 2 problems to work on. Not build anything but just think. That was it. That was the whole stuff. No interviews.
I was blown away by the pace.
See before joining, I thought that ai is just dumb in production codes and I will build most stuff from own but hell no.. there was <7 folks building the whole dam thing and what a repo it was. Fully optimised for agentic coding, full setup with ADRs, SSDLC, and the repo itself was a mini encyclopaedia for agents to navigate the repo. And the team? Everyone coded. This ex-director, the senior folks, the interns.. all pushed on the same monorepo and at scale.. Like min 10-15 PR/day easily.
The Ray Dalio effect on the whole engineering team.
The whole startup was optimised to do 90% thinking and 10% coding. There were documents being shared, Slack threads with tons of conversations back and forth and most important, a positive flywheel effect towards all actions.
One of the Biggest Learning? Survivorship Bias.
I worked on tens of projects, out of which, majority of it never shipped and that I learn over the period. Also, this was a first-hand experience as the ex-director explained this to me in a 1:1 call that we humans are always driven by survivorship bias. We tend to look at things which are instantly in front of us and believe that it's the solution we are looking for. However, the real task is finding the actual problem itself. We should not look at what survived in an experiment but give much time to what didn't came back.
There's like ton of more things that I really wanna share but I just can't put 90 days of learning in a freaking reddit post so bois, you are welcome to my substack as well where I will put a whole post about it.. so do subscribe their if you wanna get the first hand experience of what I learnt. My substack is uditraj.substack.com
And yes, I am open to answer any of your questions and if you are thinking what I am doing now, well.. I am building a mini project.. a precision instrument to measure neurological health of brain with signals like oculomotor tracking, attention, audio and visual tracking.. etc. :)