OatFi, a startup providing an embedded working capital financing infrastructure, has raised $24 million in Series A funding, CEO Michael Barbosa tells Axios exclusively.Why it matters: Slow payment terms choke company cash flows across the $35 trillion B2B economy.How it works: OatFi partners with AP, AR, and B2B payment platforms to embed financing into invoice and payment workflows.Its APIs handle underwriting, origination, and capital deployment, which allows platforms to offer net terms and ...