Backend Engineer (MTA), Core Sending
Core
Build and operate the core email transport infrastructure for a developer-focused email sending platform, handling transactional and marketing email delivery.
Role type
Senior IC backend engineer (email infrastructure)
Builds
SMTP delivery systems, MTA systems, routing, retries, backoff strategies, and delivery controls
Domain
Developer tools / Email infrastructure
Deliverable
production ML models | product features | infrastructure
Required skills
distributed systems, queues, workers, retries, idempotency, rate limits, backpressure, SMTP, MTAs, DNS, IP pools, mailbox-provider behavior, observability, incident response
Preferred skills
high-workload applications, email best practices, Typescript, Golang
Technologies
Typescript, AWS, Go, Postgres, Datadog
Responsibilities
Build and operate email transport infrastructure; Design throttling systems at domain, provider, customer, and IP levels; Build infrastructure for shared IP pools and reputation-aware routing; Improve classification of delivery outcomes; Build debugging tools for delivery issues; Partner with Trust & Safety on abuse controls; Participate in incident response; Be on-call for critical services
Seniority
Senior, hands-on IC
