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Senior Software Engineer, Backend

Customer.io· Engineering
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Hybrid (EMEA)$150k - $200kFull-timePosted 3mo ago

About the role

Backend-focused senior engineer role at Customer.io, designing, building, and evolving distributed systems to power scalable, reliable communication at mass scale.

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 platformsRelational databases (MySQL)

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
  • remote work and wellness stipends
  • professional development budget
  • equity grant in the form of stock options
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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