Customer.io is hiring a Staff Software Engineer (Backend) to make high-level architectural decisions for distributed messaging systems written in Go. The role focuses on scalability, cost/reliability tradeoffs, observability, mentoring senior engineers, cross-squad technical leadership, participating in on-call rotation, and using AI agents for multi-file changes. Requires 10+ years experience with scalable distributed systems, production-focused design, cloud-native environments (AWS/GCP), and relational databases (MySQL). Compensation range: $200,000–$240,000 USD plus a 10% annual bonus target and equity (stock options).

Customer.io is hiring a Senior Software Engineer on the Platform team to design and operate large-scale, data-intensive backend systems in Go. The role focuses on distributed systems architecture, reliability, observability, event-driven processing, databases (MySQL/Postgres, DynamoDB/BigTable), cloud-native environments (AWS/GCP), production debugging and participating in on-call rotation. Typical experience requested is 10+ years. Salary range: $150,000–$200,000 USD per year.

Customer.io seeks a Senior Software Engineer to build and scale frontend experiences (editors, analytics) and backend systems (queues, event pipelines, rate limiting) for the email channel. The role requires 7+ years building scalable distributed systems (Go or similar), frontend experience with React or similar, familiarity with cloud-native environments (AWS/GCP), MySQL, observability, and participation in an on-call rotation. Experience with email infrastructure is listed as nice-to-have.

Customer.io is hiring a Senior Software Engineer (Backend) to design, build, and operate distributed systems in Go that power large-scale messaging. Role responsibilities include architecture and schema design, testing, deployment, monitoring, participating in on-call rotation, and collaborating across teams. Required: 7+ years building scalable distributed systems, experience with cloud-native environments (AWS/GCP), familiarity with relational databases (MySQL), and observability/production operations. Role is remote across the Americas. Listed base salary range: $150,000–$200,000 USD.

Customer.io is hiring a Senior Software Engineer (Backend) to design, build, and operate distributed systems in Go that power large-scale messaging. The role involves cloud-native work (AWS/GCP), MySQL-related performance tradeoffs, observability and production operations, participating in on-call rotations, and using AI agents for multi-file code changes. Requires 7+ years building scalable distributed systems.