Senior Software Engineer, Full Stack

Customer.io is a platform that powers automated communication for over 8,000 companies. They are seeking a Fullstack Engineer to design, build, and ship core product experiences while helping to innovate on communication tools.

Responsibilities:

• Build fullstack features in Go, React, and Ember that power key customer workflows
• Collaborate with others to turn ideas into shipped customer value
• Share knowledge and raise the bar through sharing your progress publicly with short videos, thoughtful writing, and mentorship
• Help evolve our systems to scale with more customers, messages, and use cases
• 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 and scaling backend services and product-facing features
• Fluency in TypeScript, React (or similar), and a statically typed backend language like Go
• A strong care for frontend polish, backend performance, and the overall customer experience
• Proficiency with APIs, relational databases, and writing testable, performant code
• A bias for action over perfection, and pride in owning technical decisions