Senior Software Engineer - Email Channel

Customer.io

Remote regions

Americas

Salary range

$150,000–$200,000/yr

Benefits

Unlimited PTO 11w maternity

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What You'll Do:

  • Build and evolve the frontend experiences customers use to create, preview, and analyze email campaigns — template editors, sending configuration, deliverability dashboards
  • Design and scale the backend systems that power high-volume email sending, including queue management, retry logic, and event processing (bounces, complaints, deferrals)
  • Own deliverability-adjacent systems: bounce classification, suppression management, IP/domain reputation monitoring, and feedback loop processing

What We're Looking For:

  • 7+ years of experience building scalable, distributed systems in Go (or similar statically typed languages)
  • Experience building product-facing frontend features in React or similar frameworks, with attention to UX quality and polish
  • Comfort working in cloud-native environments (AWS, GCP)

Customer.io

Customer.io's platform is used by over 8,000 companies to send billions of emails, push notifications, in-app messages, and SMS every day. They help teams send smarter, more relevant messages using real-time behavioral data; under the hood, Go, React, Ember and AI help them ship fast and scale with confidence.

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