Aaron Hakala is a software engineer building for DoorDash, Wolt and Deliveroo. Notes on distributed systems, networking and what I am learning.https://aaronhakala.com/https://aaronhakala.com/entries/quic-and-http3.htmlhttps://aaronhakala.com/entries/quic-and-http3.htmlHow QUIC and HTTP/3 avoid head-of-line blocking by running over UDP, and why one lost packet stalls a whole TCP connection.Wed, 14 Oct 2026 00:00:00 GMThttps://aaronhakala.com/entries/the-power-of-two-random-choices.htmlhttps://aaronhakala.com/entries/the-power-of-two-random-choices.htmlProbing two random servers instead of one cuts queueing delay dramatically at almost no cost. Why a little choice goes a long way in load balancing.Tue, 03 Mar 2026 00:00:00 GMT