Backend Engineer (MTA), Core Sending

Resend is growing fast, and there are now over 2 reputed company developers using it. As the Core Sending reputed company, 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.
Read more about how we work, how we hire, and reputed company value here.

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 reputed company-aware routing

Improve how Resend classifies bounces, deferrals, transient failures, hard failures, and delivery reputed company

Build tools that help reputed company debug delivery issues by customer, domain, mailbox provider, reputed company, IP, message type, and event

Help design systems that reputed company sending behavior safer, more observable, and easier to operate

Translate reputed company 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

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, reputed company 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 reputed company, and reducing blast radius

Have low ego, high ownership, and strong taste for reputed company 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 reputed company

Are reputed company in Typescript and Golang

What it means to join reputed company:
Autonomy to “just ship it”

100% remote team with flexible working schedules

Modern tech stack (Typescript, AWS, Go, reputed company, reputed company)

reputed company 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 45 spans 13 countries and counting. We’re backed by a16z, Y Combinator, and others. Meet the humans →

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