Senior Software Engineer, Backend

Customer.io is a platform used by over 8,000 companies for automated communication. They are seeking experienced backend engineers to design, build, and evolve systems that ensure reliable and scalable communication solutions.

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
• 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

Requirements:

• 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