Senior SDK & Developer Experience Engineer

customerio; United States; Remote; USD 150,000 - 200,000; Full time

Benefits offered by this job

Medical/dental/vision

Parental leave

Unlimited PTO

Remote work stipend

Professional development budget

Job summary

Customer.io is seeking a Senior Developer Experience Engineer on the Integrations team to build and evolve SDKs and developer tools that external developers rely on to integrate with our messaging platform. The role blends hands-on coding with technical leadership, API design, and AI-augmented workflows across Swift, Kotlin, Node, and Go.

You will lead SDK initiatives end to end, improve delivery infrastructure, and collaborate with product and design to translate goals into a cohesive developer

Qualifications

• Expert-level competency in at least one established programming language.
• Production-quality software experience with a focus on API design.
• Strong written and verbal communication; autonomous in ambiguous environments.
• Experience with AI-assisted coding tools and LLMs to explore unfamiliar codebases.
• Nice to have: external-facing SDKs, CI infrastructure ownership, forward-deployed engineering.

Responsibilities

• Build and evolve multi-platform SDKs (iOS, Android, Node, Go) and developer tooling.
• Lead SDK initiatives end to end: direction, coding, releases.
• Improve SDK delivery infrastructure: CI pipelines, testing, versioning, publishing.
• Collaborate with product and design to craft a cohesive developer experience.
• Participate in on-call rotation to support system reliability.
• Use AI agents to perform multi-file changes across languages and verify outputs.
• Maintain strong customer empathy by understanding IDE integrator needs.

Skills

Swift

Kotlin

Node

Go

Tools

CI/CD pipelines

API design

Job description

Customer.io is seeking a Senior Developer Experience Engineer on the Integrations team to build and evolve SDKs and developer tools that external developers rely on to integrate with our messaging platform. The role blends hands-on coding with technical leadership, API design, and AI-augmented workflows across Swift, Kotlin, Node, and Go.

You will lead SDK initiatives end to end, improve delivery infrastructure, and collaborate with product and design to translate goals into a cohesive developer