Senior Software Engineer - Backend Platform

About the Role

Customer.io is looking for experienced backend engineers to build and own the infrastructure powering our data-intensive marketing automation platform. You will join the Platform team to tackle complex distributed systems challenges, including fault tolerance, high-scale service scaling, and foundational architecture.

What You'll Do

• Design and evolve distributed systems in Go to handle billions of daily events and petabytes of data.
• Lead architectural decisions regarding performance, reliability, and real-time event processing.
• Improve service-to-service communication via optimized APIs and event-driven patterns.
• Uncover and resolve system bottlenecks to improve developer and customer experience.
• Debug production systems at scale using advanced instrumentation.
• Mentor team members and share knowledge through technical writing and documentation.
• Leverage AI tools to prototype and accelerate development workflows.

What You'll Bring

• 10+ years of experience building scalable, distributed systems in Go or similar statically typed languages.
• Deep expertise with relational (MySQL, Postgres) and non-relational (DynamoDB, BigTable) databases.
• Strong instincts for reliability, observability, and fault tolerance.
• Comfort working in cloud-native environments (AWS, GCP).
• A collaborative mindset and a bias for action over perfection.
• Experience with event-driven systems and message queues is a plus.

Compensation & Benefits

• Salary: $150,000 - $200,000 USD.
• 100% coverage of medical, dental, vision, mental health, and supplemental insurance for you and your family.
• 16 weeks paid parental leave.
• Unlimited PTO.
• Stipends for remote work and wellness.
• Professional development budget.