Backend Engineer (MTA), Trust & Safety

• Resend is building the most accessible email platform for developers. As we’ve grown to 4M+ users and continue to onboard thousands of new users every day, the pressure of maintaining a safe place for good senders continues to build.
• This role is fully remote-based in Americas or European time zones, with some expected travel for team off-sites, conferences, meetups, and more.
• Read more about how we work, how we hire, and what we value here https://resend.com/handbook.

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 the team debug delivery issues by customer, domain, mailbox provider, route, IP, message type, and event - Help design systems that make sending behavior safer, more observable, and easier to operate - Translate reputation strategy into backend systems - Partner with Trust & Safety and Core Sending to build controls that protect Resend’s sending network from abuse - Participate in incident response for sending, provider, and deliverability-sensitive issues - Be on-call for critical services
• YOU WILL BE A GREAT FIT IF YOU...
• - Have strong backend engineering 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 or strong interest in SMTP, MTAs, DNS, bounces, deferrals, DNS, IP pools, and mailbox-provider behavior - Care about reliability, observability, operational excellence, and reducing blast radius - Have low ego, high ownership, and strong taste for simple systems
• YOU WILL BE AN EXCEPTIONAL FIT IF YOU ALSO...
• - 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. We care deeply about quality, craft, and the developer experience.
• Our fully remote team of 50 spans 15 countries and counting. We're backed by a16z, Y Combinator, and others. Meet the humans → https://resend.com/humans