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Backend Engineer, MTA

Resend·EuropeRemotemid$12,500–$14,167 USD/mo

In short

  • →Construyes y operas la infraestructura de transporte de correo (MTA) con enfoque en entregas seguras y escalables.
  • →Trabajas diariamente con SMTP, reintentos, encolado, control de tasas y sistemas de reputación de IPs y dominios.
  • →Destacado: Impacto directo en la confiabilidad y reputación del ecosistema de correo de 4M+ usuarios.

No se requiere inglés explícito, pero el puesto es completamente en inglés por contexto (t

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In ~1 minute you get: who interviews you, the likely questions answered from your CV, and your CV tailored to this job. Free, no card.

The questions they'll ask you

1. ¿Cómo diseñarías un sistema de reintentos con backoff exponencial y throttling por IP en un MTA?

2. ¿Cómo clasificarías y manejarías un bounce por 'banned sender' en un sistema de entrega masiva?

3. ¿Qué métricas monitorizarías en un servicio MTA para detectar rápido problemas de entrega a proveedores like Gmail o Outlook?

🔒 +7 more questions

No card. Upload your resume and the full dossier is ready in ~1 minute.

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💵 USD · Remote · No visa

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What they ask for

  • ✓Experiencia sólida en ingeniería backend
  • ✓Conocimiento en sistemas de alto volumen de entrega (email, mensajería)
  • ✓Entendimiento de colas, workers, retries, idempotencia y sistemas distribuidos
  • ✓Conocimiento práctico de SMTP, MTAs, DNS, bounces y comportamiento de proveedores de correo
  • ✓Enfoque en confiabilidad, observabilidad y manejo de incidentes
  • ✓Toma de propiedad, baja egocentrismo y preferencia por soluciones simples.

Don't tick every box? That's normal — your free dossier shows your gaps and how to cover them in the interview.

TypescriptGolangAWSPostgresDatadogSMTPMTADNSQueuesWorkers

Who should you write to at Resend?

Your free dossier identifies the people who'd interview you — their background, what they value, and how to reach out so you stand out before applying.

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

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