Intro I built a B2B sales-list-generation SaaS as a solo/small-team developer and have been running it in production. The product is bacotto — type in an industry and a region, and it returns 100 enriched leads in 3 minutes (address, phone, email, Instagram handle, LINE official account, Google reviews, plus a "still operating" classification). This post walks through the architecture from the angle of "engineering decisions a tiny team needs to make to keep the lights on cheaply." Should be useful if you're building a Maps-API + Web-scraping style SaaS, or any low-budget local B2B tool.…