Senior Software Engineer - Backend Platform at Customer.io

Confirmed open

Customer.io is hiring a senior software engineer - backend platform focused on backend platform services.

Customer.io

Location: Remote
Advertised region: Americas Remote
Work arrangement: remote
Technologies: React, AWS, GCP, Go

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Role overview

Design distributed Go backend systems for Customer.io’s high-volume messaging and event platform. Improve fault tolerance, observability and capacity while owning infrastructure used by other engineering teams.

Responsibilities

Design and evolve Go services that process large volumes of messages and events.
Improve reliability and observability of distributed platform services under production load.
Shape foundational architecture and capacity decisions for other Customer.io teams.

Qualifications

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
We believe in transparency. Starting salary for this role is $150,000 - $200,000 USD (or equivalent in local currency) depending on experience and subject to market rate adjustment.
We know our people are what make us great, and we’re committed to taking great care of them. Our inclusive benefits package supports your well-being and growth, including 100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for you and your family. We also offer 16 weeks paid parental leave, unlimited PTO, stipends for remote work and wellness, a professional development budget, and more.
No gotchas, no trick questions - just a clear, human process designed to help both of us make an informed decision.
Application - We review everyone with care. Tell us why you're interested.
Recruiter Call (30 mins) - Let’s chat about what you’re looking for and how we work.
Hiring Manager Interview (60 mins) - Talk with one of our hiring managers about your working style and a project you've owned end-to-end, plus a short AI-assisted coding exercise.
System Design Interview (60 mins) - A collaborative system design conversation focused on scaling challenges.
Coding Interview (60 mins) - Pair with one of our engineers for an agentic live coding interview.
All final candidates will be asked to complete a background check and employment verifications as part of our pre-employment process.
Customer.io recognizes the stifling impact of systemic injustice on diverse communities. We commit to using our influence to increase inclusion and equity within the tech industry. We strive to build an inclusive team culture, implement bias-free hiring practices, and develop community partnerships to expand our global impact.
Zoom is the only video conference platform that we use, virtual interviews will be conducted using the video capability (i.e., not via the chat), and offers will be extended in writing on official Customer.io letterhead. Please be vigilant in all of your job search activity, and if you have any questions please contact jobs@customer.io .

Technology in this role

React: Under the hood: Go, React, Ember and AI help us ship fast and scale with .
AWS: 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 .
GCP: 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 .
Go: 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 .
MySQL: 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 .
DynamoDB: 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 .

Benefits

Remote Americas or worldwide arrangement as stated in the official posting.
Opportunity to work on software used by technology customers.

About Customer.io

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.

A healthy disregard for “the way things are done”

You bring rigor and creativity. Best practices matter, but never more than forward motion.

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