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Senior Software Engineer, Backend

Customer.io· Engineering
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Remote$150k - $200k + equityfull-timePosted 3mo ago

About the role

Senior backend engineer focused on designing, building, and maintaining distributed systems at scale using Go, with emphasis on reliability, performance, and observability. Fully remote in Americas, with collaboration across teams and responsibility from architecture to on-call support and mentoring.

Responsibilities

  • Design and build distributed systems in Go that help customers send timely, relevant messages at scale
  • Collaborate across teams to debug issues and deliver reliable solutions
  • Own problems end to end - from architecture and schema design to testing, deployment, and monitoring
  • Participate in an on-call rotation as required, supporting the reliability of the systems you build
  • Share knowledge and raise the bar through sharing your progress publicly with short videos, thoughtful writing, and mentorship
  • Use AI agents to make multi-file changes by scoping the work, writing the prompt, and verifying the output

Qualifications

  • 7+ years of experience building scalable, distributed systems in Go (or similar statically typed languages)
  • Comfort working in cloud-native environments (AWS, GCP)
  • Familiarity with relational databases (we use MySQL) and an understanding of performance tradeoffs
  • Experience with observability tooling and operating production systems
  • A bias for action over perfection, and pride in owning technical decisions

Skills

Required:GoCloud environmentsRelational databases (MySQL)Observability toolingOn-call reliabilityCommunication and collaboration
Nice to have:AI-assisted development

Benefits

  • 100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for you and your family
  • 16 weeks paid parental leave
  • unlimited PTO
  • stipends for remote work and wellness
  • professional development budget
Last updated Oct 18, 2026. Interested? Apply on the company site.

About Customer.io

Customer.io Platform: Automation, Data, Content Creation

The customer engagement platform for personalized customer journeys across all channels, fueled by first-party data.

AutomationContent CreationCustomer JourneysCustomer engagementDataFirst-party dataPlatformbrex-fastest-growing-2025
Company profileWebsite

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