Software engineer · Email & infrastructure

Hi, I'm Francis

I build reliable email systems, from deliverability and compliance operations to the engineering behind large-scale sending pipelines. Cloud ESPs, self-hosted MTAs, and the tooling around them.

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Francis Baker headshot

At Klaviyo

Deliverability & Compliance
Early employee and first hire on Klaviyo's Deliverability & Compliance team. Built the function, then moved into a hybrid ops and engineering role.
Today
Senior engineer on the internal MTA pipeline—traffic routing, IP warming, and the systems that moved tens of thousands of brands onto mail we run ourselves.

Side projects

EmailGuard, InboundParse, ineedatest.email, and DnsBuddy—email validation, inbound parsing, disposable test inboxes, and DNS tooling, plus this site.

See what I've built

Outside of work

Home & family

I live in Massachusetts with my wife and our two dogs, Jules (pitbull) and Harold (golden retriever).

Gaming

When I'm not outside, I'm usually gaming. MMOs, FPS titles like Destiny 2 and Battlefield, and whatever new loot grind or squad shooter friends are on that week.