Senior Software Engineer, Full Stack

Details

Customer.io is looking for a curious, driven Full Stack Product Engineer to own significant product initiatives and build core experiences used by customers. The role involves designing, building, and shipping communication tools powered by real-time behavioral data.

Customer.io's platform is used by more than 8,000 companies to send emails, push notifications, in-app messages, and SMS. The engineering stack includes Go, React, Ember, and AI.

Responsibilities

• Build full-stack 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 progress updates, short videos, thoughtful writing, and mentorship.
• Help evolve systems to scale with more customers, messages, and use cases.
• Use AI agents to make multi-file changes by scoping the work, writing prompts, and verifying the output.
• Own problems end to end, move quickly, act as an owner, and work effectively in ambiguity.
• Apply product thinking and care about frontend polish, backend performance, and the overall customer experience.

Requirements

• 7+ years of experience building and scaling backend services and product-facing features.
• Fluency in TypeScript, React or a similar frontend framework, and a statically typed backend language such as Go.
• Strong attention to frontend polish, backend performance, and customer experience.
• Proficiency with APIs and relational databases.
• Experience writing testable, performant code.
• A bias for action over perfection and pride in owning technical decisions.

Compensation And Benefits

• Starting salary: $150,000–$200,000 USD, or equivalent in local currency, depending on experience and subject to market-rate adjustment.
• Medical, dental, vision, mental health, and supplemental insurance premiums covered at 100% for employees and their families.
• 16 weeks of paid parental leave.
• Unlimited paid time off.
• Remote-work and wellness stipends.
• Professional development budget.

Hiring Process

• Application review.
• 30-minute recruiter call.
• 60-minute behavioral interview.
• 60-minute system design interview.
• Take-home assignment.
• Two 60-minute assignment review calls.

Final candidates will complete a background check and employment verifications.