Senior Software Engineer, Backend

at Customer.io

📍 Argentina
📍 Brazil
📍 Canada
📍 Chile
📍 Colombia
📍 Mexico
📍 Peru
📍 United States

USD 150,000-200,000 per year

SENIOR

✅ Remote

Tech Stack
Tag name is followed by "@" symbol and proficiency level value. About proficiency levels:

1-2 — basic awareness. Minimal hands-on experience, and a rudimentary understanding of the technology's purpose;

3-6 — daily use. Comfortable and regular usage, capable of handling common tasks and challenges related to the technology;

7-9 — you are an expert, you can teach others, you know all the pitfalls and tricks;

10 — exceptional knowledge, comprehensive understanding, and adeptness in all aspects of the technology, including advanced problem-solving. Think twice before claiming or demanding such level.

AI AWS @ 6 Communication @ 4 Distributed Systems @ 7 GCP @ 6 Go @ 7 MySQL @ 6 Observability @ 4 React

Details

We’re looking for experienced backend engineers to design, build, and evolve reliable, performant, and scalable systems that power communication at massive scale. Customer.io uses Go, React, Ember, and AI to help companies send relevant messages using real-time behavioral data.

Responsibilities

Design and build distributed systems in Go that help customers send timely, relevant messages at scale.
Collaborate across teams to debug issues and deliver reliable solutions.
Own problems end to end, from architecture and schema design through testing, deployment, and monitoring.
Share knowledge and raise the engineering bar through short progress videos, thoughtful writing, and mentorship.
Use AI agents to make multi-file changes by scoping the work, writing prompts, and verifying the output.

Requirements

7+ years of experience building scalable, distributed systems in Go or similar statically typed languages.
Comfort working in cloud-native environments, including AWS and GCP.
Familiarity with relational databases; Customer.io uses MySQL.
Understanding of database performance tradeoffs.
Experience with observability tooling and operating production systems.
A bias for action over perfection and pride in owning technical decisions.
Experience leading complex projects, whether officially or unofficially.
Product-oriented thinking and an ability to connect engineering decisions to customer value.

Compensation And Benefits

Starting salary of $150,000–$200,000 USD, or equivalent in local currency, depending on experience and subject to market rate adjustment.
100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for employees and their families.
16 weeks of paid parental leave.
Unlimited paid time off.
Remote work and wellness stipends.
Professional development budget.

Hiring Process

Application review.
30-minute recruiter call.
60-minute behavioral interview.
60-minute technical interview focused on system design and scaling challenges.
Take-home assignment.
60-minute assignment review call.

Final candidates will complete a background check and employment verifications as part of the pre-employment process. Interviews are conducted virtually using Zoom.