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# Backend Engineer

- **Company:** RESENDEZ JULIO AND RESEND
- **Location:** United States (Remote available)
- **Salary:** $150,000.0 - $170,000.0
- **Contract:** Permanent contract
- **Skills:** Software Debugging, Distributed Systems, Domain Name System (DNS), Message Transfer Agent, Simple Mail Transfer Protocols, TypeScript, Backend, Build Tools, Golang
- **Published:** September 4, 2026
- **Apply:** https://startup.jobs/backend-engineer-mta-trust-safety-resend-8026857

## About the Role

* 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

## Description

* 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


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