Starting a small company with partners, what bootstrapping services can I use?

I’m looking to start a small highly technical multi asset quant/stat vol/arb/HFT with some friends from my long career in tech and quant trading. I founded some startups in the mid 90’s so it’s not my first rodeo, but I have seen so many awesome services and startups posted here focused on bootstrapping and providing leverage to small teams, and I’d really like to build something elegant and modern in the business sense without distracting from the building of the business. Ideally I could scale as we scale, we are self funding for now so every dollar spent on business services is dollar not at work growing the fund. I have a rough business plan that could see geometric growth over time so it would be nice if the services are like any good service - scale invariant. I guess, what would the serverless architecture for a new high tech business in 2023 look like?

Thank you for any suggestions, thoughts, recommendations, pitches etc. It’s an exciting step in my life after 20 years in FAANG and globomegacorps and other peoples funds.