Build and operate Resend’s email transport infrastructure.
Design systems for domain-level, provider-level, customer-level, and IP-level throttling.
Partner with Trust & Safety to build controls that protect Resend’s sending network from abuse.
Resend is building the modern email sending platform for developers and cares deeply about quality, craft, and the developer experience. They are a fully remote team of 45 spanning 13 countries and are backed by a16z, Y Combinator, and others.
Build and evolve the frontend experiences customers use to create, preview, and analyze email campaigns.
Design and scale the backend systems that power high-volume email sending, including queue management, retry logic, and event processing.
Own deliverability-adjacent systems: bounce classification, suppression management, IP/domain reputation monitoring, and feedback loop processing.
Customer.io's platform is used by over 8,000 companies to send billions of emails, push notifications, in-app messages, and SMS every day. They help teams send smarter, more relevant messages using real-time behavioral data; under the hood, Go, React, Ember and AI help them ship fast and scale with confidence.