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Latest Fullstack Engineering jobs at Customer.io

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Customer.io

Senior Fullstack SDK Engineer

Customer.ioUnited States

Build, evolve, and lead end-to-end development of Customer.io's SDKs across mobile and server platforms. Requires expert programming skills, strong API/developer experience focus, high autonomy, and exceptional fluency with LLMs and agentic AI coding tools like Claude and Cursor.

150k – 200k/yrRemote5+ YOEFullstack Engineering
Customer.io

Senior Software Engineer - Email Channel

Customer.ioUnited States

Build and scale end-to-end email channel infrastructure and customer-facing frontend for high-volume messaging. Requires 7+ years in Go, React experience, cloud environments, email deliverability expertise, and full-stack ownership.

150k – 200k/yrRemote7+ YOEFullstack Engineering
Customer.io

Senior Software Engineer, Full Stack

Customer.ioUnited States

Build and ship fullstack features using Go, React, and Ember to power customer workflows at scale. Requires 7+ years experience, fluency in TypeScript/React/Go, and strong focus on performance and customer experience.

150k – 200k/yrRemote7+ YOEFullstack Engineering