• 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 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
• 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