Senior Software Engineer, Backend

Role Overview

About Customer.io

What We Value

• Own problems end to end, move quickly, act like an owner, and thrive in ambiguity.
• Think like a product user and connect engineering systems to customer value.
• Apply rigor and creativity while questioning existing practices when forward motion requires it.

What You’ll Do

• Design and build distributed systems in Go that support timely, relevant messaging at scale.
• Collaborate across teams to debug issues and deliver reliable solutions.
• Own work from architecture and schema design through testing, deployment, and monitoring.
• Share progress publicly through short videos and thoughtful writing, and mentor other engineers.
• Use AI agents to scope work, write prompts, make multi-file changes, and verify results.

What We’re Looking For

• At least 7 years of experience building scalable distributed systems in Go or a similar statically typed language.
• Comfort working in cloud-native environments such as AWS or GCP.
• Familiarity with relational databases such as MySQL and an understanding of performance tradeoffs.
• Experience with observability tooling and operating production systems.
• A bias for action, ownership of technical decisions, and pride in engineering work.

Compensation

• Starting salary is $150,000 to $200,000 USD or the equivalent in local currency, depending on experience and market rates.

Benefits

• Benefits include family medical, dental, vision, mental health, and supplemental insurance coverage.
• The package includes 16 weeks of paid parental leave, unlimited paid time off, remote-work and wellness stipends, and professional development funding.

Additional Benefits

• Employees receive 25 holiday days per year, local public holidays, flexible working arrangements, and the option to work abroad for up to three months annually.
• The company offers a paid sabbatical after five years and enhanced parental leave.

Hiring Process

• The process includes an application, recruiter call, hiring manager interview, technical system design interview, take-home assignment, and assignment review call.
• Final candidates complete a background check and employment verifications.