Senior Software Engineer – Backend Platform

Customer.io

Senior Software Engineer at Customer.io building scalable, reliable systems for a data-intensive marketing automation platform. Tackling distributed systems challenges and improving service performance.

Posted 7/10/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $150,000 - $200,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsDynamoDBGoGoogle Cloud PlatformMySQLPostgres

About the role

Key responsibilities & impact

Design and evolve distributed systems in Go to handle billions of daily events and messages and store and index petabytes of data
Lead architectural decisions around performance, reliability, and real-time event processing
Improve service-to-service communication through better APIs, messaging systems, and event-driven patterns
Work across teams to uncover bottlenecks and system issues, and lead initiatives to resolve them for a smoother customer experience
Tackle high-throughput challenges across data pipelines, queues, and scheduling infrastructure
Able to debug production systems at scale using effective instrumentation, and resolve issues quickly and confidently
Share knowledge and raise the bar through sharing your progress publicly with short videos, thoughtful writing, and mentorship
Leverage AI tools to prototype, move faster, and make better decisions.

Requirements

What you’ll need

Significant experience (typically 10+ years) building scalable, distributed systems in Go (or similar statically typed languages)
Deep experience with databases - relational (MySQL, Postgres) and non-relational (DynamoDB, BigTable) - and how to make them fast
Comfort working in cloud-native environments (AWS, GCP)
Familiarity with APIs, observability, and operating production systems
A bias for action over perfection, and pride in owning technical decisions.

Benefits

Comp & perks

100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for you and your family.
16 weeks paid parental leave
Unlimited PTO
Stipends for remote work and wellness
Professional development budget
More.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Go Programming LanguageDistributed Systems DesignDatabase ManagementAPI DevelopmentEvent-Driven ArchitecturePerformance OptimizationDebugging Production SystemsData Pipeline ManagementCloud Services (AWS, GCP)Observability

Soft Skills

MentorshipCollaborationProblem-SolvingCommunicationBias for Action