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.

Customer.io seeks a Senior Software Engineer (Product/AI) to design, build, and ship core product experiences. Role focuses on fullstack work (Go, React, Ember, TypeScript), APIs, relational databases, performance, testing, system reliability (on-call), and using AI agents for code changes. Compensation listed at $150,000–$250,000 USD/year. Americas-remote.

Customer.io is hiring a Senior Software Engineer (Product/AI) to build and ship core product experiences using Go, React, Ember, and AI-assisted tooling. The role requires 7+ years experience building and scaling backend services and product-facing features, fluency in TypeScript and a statically typed backend language (e.g., Go), and experience with APIs, relational databases, testing, and on-call responsibilities. Compensation range listed: $150,000–$250,000 USD per year.