Senior Software Engineer - Backend Platform

Stack

Responsibilities

• ▹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
• ▹Tackle high-throughput challenges across data pipelines, queues, and scheduling infrastructure
• ▹Debug production systems at scale using effective instrumentation
• ▹Share knowledge and raise the bar through videos, writing, and mentorship
• ▹Leverage AI tools to prototype, move faster, and make better decisions

Requirements

• ▹Significant experience (typically 10+ years) building scalable, distributed systems in Go (or similar statically typed languages)
• ▹Deep experience with relational (MySQL, Postgres) and non-relational (DynamoDB, BigTable) databases, 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

Nice to have

• ▹Experience with event-driven systems, message queues, or data pipelines

Soft skills

What we offer

• ▹Starting salary $150,000-$200,000 USD (or equivalent in local currency) depending on experience
• ▹100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for employee and family
• ▹16 weeks paid parental leave
• ▹Unlimited PTO
• ▹Stipends for remote work and wellness
• ▹Professional development budget

About the company

Customer.io's platform is used by over 9,000 companies - from scrappy startups to global brands - to send billions of emails, push notifications, in-app messages, and SMS every day. Under the hood, Go, React, Ember, and AI help the team ship fast and scale with confidence.