About the Job
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...
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 syste...
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.
Key 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 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
Required Skills & Abilities
Deep experience with distributed systems and large-scale backend architecture
Strong instincts around reliability, observability, and fault tolerance
Comfort reasoning about performance, capacity, and trade-offs at scale
Experience with event-driven systems, message queues, or data pipelines is a plus
A collaborative mindset — you raise the team around you
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. Customer.io powers automated communication that people actually want to receive.
We help teams send smarter, more relevant messages using real-time behavioral data. Under the hood: Go, React, Ember and AI help us ship fast and scale with confidence.
You drive technical direction across systems and teams. You move with urgency, build with empathy, and think long-term. You’ve led large-scale infrastructure initiatives and know what it takes to get them over the line.
You think about how infrastructure unlocks customer value. You care about developer experience, system design, and how your work shapes the customer experience.
You bring rigor and creativity. Best practices matter, but never more than forward motion.
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
