Backend Engineer (MTA), Trust & Safety

Resend
Americas, United States
Workplace: RemoteFull timeUSD 150,000 - 170,000 annuallyFunction: Software EngineeringSkills: ["Ownership","Problem solving","Communication"]

Join the Core Sending squad to design, build, and operate the email transport infrastructure for high-volume transactional and marketing emails. You will work on SMTP delivery, MTA systems, throttling, IP management, and deliverability; shaping reliable, observable backend systems with a low-ego, ownership-driven team in a fully remote, async-friendly environment.

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FursaFursa
Resend
Resend
3 months ago

Backend Engineer (MTA), Trust & Safety

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 4 hours agoStatus: Live

Job Summary

Join the Core Sending squad to design, build, and operate the email transport infrastructure for high-volume transactional and marketing emails. You will work on SMTP delivery, MTA systems, throttling, IP management, and deliverability; shaping reliable, observable backend systems with a low-ego, ownership-driven team in a fully remote, async-friendly environment.
Location: Americas, United States
Workplace: Remote
Employment Type: Full time
Job Function: Software Engineering

Key Responsibilities

  • •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 delivery outcomes are classified and monitored.
Travel: Low travel

Pay and Benefits

Salary: USD 150,000 - 170,000 annually

Key Requirements

  • •Strong backend engineering experience
  • •Experience with email, messaging, notifications, or high-volume delivery systems
  • •Understanding of queues, workers, retries, idempotency, rate limits, backpressure, and distributed systems
  • •Experience or strong interest in SMTP, MTAs, DNS, bounces/deferrals, IP pools, and mailbox-provider behavior
  • •Bias toward reliability, observability, and reducing blast radius
Experience:EmailHigh-volume delivery systems
Skills:OwnershipProblem solvingCommunication
Languages:English
Tech Stack:TypescriptGoPostgreSQLAWSDatadogSMTPMTA

Company Brief

Resend
Resend provides a developer-focused email API and platform for building, testing, and delivering transactional and marketing emails with improved deliverability and developer tooling.
Industry: API Platforms
Company Size: Small (11 to 50 employees)
Growth: Growth Stage Startup
Funding: Series A
Headquarters: San Francisco, United States
Founded: 2023
WebsiteLinkedIn