Deliverability Engineer, Core Sending

Resend

7d•$150,000 - $180,000•Remote

About The Position

Resend is experiencing rapid growth, with over 2 million developers now using the platform. The Core Sending Squad is responsible for building and maintaining the foundational components that manage the sending of transactional and marketing emails. This role is fully remote and based in Americas time zones, with occasional travel for team off-sites, conferences, and meetups.

Requirements

Experience in email deliverability, reputation, mail operations, anti-abuse, or high-volume email systems.
Understanding of IP reputation, domain reputation, authentication, bounces, complaints, suppressions, and warmup.
Knowledge of how major mailbox providers behave and how to diagnose provider-specific delivery issues.
Ability to turn ambiguous deliverability judgment into metrics, policies, runbooks, dashboards, and systems.
Clear communication skills with engineering, support, product, and customers.
Low ego, strong judgment, and high ownership.

Nice To Haves

Experience with Google Postmaster Tools, Microsoft SNDS/JMRP, Yahoo Sender Hub, feedback loops, or blocklist monitoring.
Understanding of DKIM, SPF, DMARC, PTR, TLS, DSNs, List-Unsubscribe, suppression, and bounce classification.
Understanding of IP reputation, domain reputation, authentication, bounces, complaints, suppressions, and warmup.
Experience partnering with Trust & Safety, anti-abuse, support, or customer-facing teams.
Experience helping build deliverability dashboards, reputation scoring, traffic segmentation, or automated enforcement systems.
Experience helping engineering teams turn deliverability knowledge into product and infrastructure.

Responsibilities

Building and maintaining the core components of Resend that handle sending transactional and marketing emails.
Turning ambiguous deliverability judgment into metrics, policies, runbooks, dashboards, and systems.
Communicating clearly with engineering, support, product, and customers.
Operating shared and dedicated IP pools.
Designing or managing IP warmup programs.
Recovering from provider blocks, spam-foldering issues, complaint spikes, deferral spikes, or blocklist events.
Partnering with Trust & Safety, anti-abuse, support, or customer-facing teams.
Helping build deliverability dashboards, reputation scoring, traffic segmentation, or automated enforcement systems.
Helping engineering teams turn deliverability knowledge into product and infrastructure.