Backend Engineer (MTA), Core Sending

United StatesRemote

Responsibilities

IN THIS ROLE, YOU WILL… - Build and operate Resend’s email transport infrastructure - Work on SMTP delivery, MTA systems, routing, retries, backoff strategies, and delivery controls - Design systems for domain-level, provider-level, customer-level, and IP-level throttling - Build infrastructure for shared IP pools, dedicated IPs, warmup execution, and reputation-aware routing - Improve how Resend classifies bounces, deferrals, transient failures, hard failures, and delivery outcomes - Build tools that help

experience - Have worked on email, messaging, notifications, communications, infrastructure, or other high-volume delivery systems - Understand queues, workers, retries, idempotency, rate limits, backpressure, and distributed systems - Have
experience working on applications with a high workload - Know about email best practices, or are willing to learn more about this space - Are experienced in Typescript and Golang WHAT IT MEANS TO JOIN THE TEAM: - Autonomy to "just ship it" - 100% remote team with flexible working schedules - Modern tech stack (Typescript, AWS, Go, Postgres, Datadog) - Honest and low-ego team - Ownership of problems and solutions - Comp: $150,000 - $170,000 USD, commensurate with
experience ABOUT RESEND We are building the modern email sending platform for developers.

Read more about how we work, how we hire, and what we value here https://resend.com/handbook.
Meet the humans → https://resend.com/humans

Resend is growing fast, and there are now over 2 million developers using it.
As the Core Sending Squad, we are responsible for building and maintaining the core components of Resend that handle sending transactional and marketing emails.
This role is fully remote-based in Americas or European time zones, with some expected travel for team off-sites, conferences, meetups, and more.