Email Infrastructure & Deliverability Engineer

We're looking for an Email Infrastructure & Deliverability Engineer to own the systems that send email at scale for a fast-growing ecommerce lifecycle marketing platform — covering behavioral tracking, personalization, and email/SMS automation.

In this role, you'll own the entire email sending infrastructure — from queues and scheduling through delivery, feedback processing, and reputation management across a multi-tenant environment.
This is a great opportunity for someone with deep backend infrastructure experience and real email deliverability expertise who enjoys owning critical systems end-to-end, protecting sender reputation at scale, and working autonomously in a small, high-ownership team.

Your responsibilities will include:

Build and operate high-throughput email sending services, queues, and workers

Implement retries, backpressure, prioritization, rate limits, and adaptive throttling

Manage shared and dedicated IP pools, domain reputation, warm-up, and traffic routing

Build domain onboarding for SPF, DKIM, DMARC, return-path, and tracking domains

Process bounces, complaints, unsubscribes, suppressions, and ISP feedback loops

Monitor throughput, queue latency, deferrals, bounce rates, complaints, and reputation signals

Create automated guardrails that throttle, pause, reroute, or block unsafe sending

Diagnose production issues across SMTP, DNS, providers, queues, and mailbox providers

Own your systems end to end, including observability and incident response

What we expect from you:

Strong backend or infrastructure engineering experience

Production experience building or operating high-volume email systems, ideally at an ESP or marketing automation platform

Deep knowledge of SMTP, bounces, complaints, deferrals, throttling, and mailbox-provider behavior

Hands-on experience managing sender reputation across domains and IP pools

Strong knowledge of SPF, DKIM, DMARC, DNS, domain alignment, and custom sending domains

Experience with queues, distributed workers, idempotency, rate limiting, SQL, and Redis

Ability to diagnose blocklists, spam complaints, authentication failures, and reputation changes

Understanding of how list quality, engagement, spam traps, and customer abuse affect deliverability

Clear communication and the ability to work autonomously in a small team

Nice to have:

Experience at an ESP such as Klaviyo, Mailchimp, Braze, Iterable, SendGrid, Mailgun, or Customer.io

Experience with Amazon SES or MTAs such as Postfix, Haraka, or PowerMTA

Familiarity with Google Postmaster Tools, Microsoft SNDS/JMRP, feedback loops, and blocklist monitoring

Experience with Go, Node.js/TypeScript, Kafka, Pub/Sub, Kubernetes, or Prometheus

Experience using AI coding tools such as Claude Code or Codex

What we offer:

Interesting project and technical challenges that support both professional and personal growth.

A long-term project with stability and impact.

A flexible, results-oriented schedule with hybrid or remote work options.

A comfortable, modern office in Kyiv with generator and battery backup.

Competitive salary, medical insurance, and a supportive onboarding/trial period.

Team-building events, including parties, online activities, picnics, and more.

The opportunity to work in a Top Employer company (DOU 2025).

Originally posted on Himalayas