Senior Software Engineer - Backend Platform

At Customer.io, a Most Loved Workplace® certified employer in the Computer Software space, Empower your customers with unified, real-time engagement at scale.

<p>Hi, I'm Manu, Engineering Manager at <a href="http://Customer.io/">Customer.io</a>. 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.</p>

<p>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 <a href="http://Customer.io">Customer.io</a> 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.</p>

<p>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.</p>

<p><strong>What you'll bring:</strong></p>

<ul>

<li>Deep experience with distributed systems and large-scale backend architecture</li>

<li>Strong instincts around reliability, observability, and fault tolerance</li>

<li>Comfort reasoning about performance, capacity, and trade-offs at scale</li>

<li>Experience with event-driven systems, message queues, or data pipelines is a plus</li>

<li>A collaborative mindset — you raise the team around you</li>

</ul>

<h3>About <a href="http://Customer.io/">Customer.io</a></h3>

<p>Over 9,000 companies - from scrappy startups to global brands - use our platform to send billions of emails, push notifications, in-app messages, and SMS every day. <a hre

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