Backend Engineer (MTA), Core Sending

Resend $150K - $170K/year Posted about 2 months ago

100% remote Americas · Americas or European time zones

About the role

Resend is growing fast, and there are now over 2 million developers using it. As the Core Sending Squad, 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.

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
  • Help design systems that make sending behavior safer, more observable, and easier to operate
  • 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, IP pools, and mailbox-provider behavior

What it means to join the team:

  • 100% remote team with flexible working schedules
  • Modern tech stack (Typescript, AWS, Go, Postgres, Datadog)
  • Comp: $150,000 - $170,000 USD, commensurate with experience

Skills

How to apply

Apply directly on the employer's application page. Your application goes straight to them.

Republished listing

This opportunity was discovered on Resend's public careers page and is republished here for discovery purposes. Applications are handled by the employer.

Resend team? Claim this listing or ask us to remove it.