Senior Software Engineer - Backend Platform

Remote: yes Posted: 2026-07-10

Hi, I'm Manu, Engineering Manager at Customer.io. We're looking for experienced backend engineers who want to build and own the infrastructure that powers one of the most data-intensive platforms in marketing automation — systems that process millions of events per second, orchestrate complex workflows at scale, and keep everything running reliably for thousands of customers worldwide.

You'll work on the Platform team, tackling hard distributed systems problems: designing for fault tolerance, scaling services under real production pressure, and building the foundational layers that every other team at Customer.io depends on. This isn't just maintenance work — you'll shape the architecture of systems that need to be both highly available and constantly evolving.

If you're someone who gets energized by the intersection of scale, reliability, and developer experience — and wants ownership over infrastructure that truly matters — we'd love to talk.

- 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

- Participate in an on-call rotation as required, supporting the reliability of the systems you build

- 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