Senior Software Engineer, Backend
Customer.io
About this role
A Backend Engineer at Customer.io designs and builds distributed systems in Go that help customers send timely, relevant messages at scale. The role involves collaborating across teams, owning problems end to end, and using AI agents to make multi-file changes.
Skills
About Customer.io
customer.ioCustomer.io is a data-driven customer engagement platform that helps teams design and automate personalized customer journeys across email, SMS, push, in-app and other channels. It centralizes first‑party event and profile data to power segmentation, behavior-driven workflows, content creation, A/B testing and analytics. Targeted at product, growth and marketing teams, Customer.io emphasizes privacy, deliverability and developer-friendly APIs and integrations to orchestrate lifecycle and transactional messaging.
Recent company news
The Business JournalsFastest Growing Companies 2025: #15 Customer.io
Oct 8, 2025
G2 Learning HubAI in Customer Engagement: 2025 Industry Data Report
Aug 29, 2025
Andreessen HorowitzThe AI Application Spending Report: Where Startup Dollars Really Go
Oct 2, 2025
SaaStrHow Top SaaS Companies Drive 2-3x Better Campaign Performance Through Multi-Channel Personalization with Customer.io
Feb 7, 2025
Business WireCustomer.io Launches a Customer Data Platform (CDP) to Activate Real-Time Data
Jul 25, 2023
About Customer.io
Headquarters
San Francisco, CA
Company Size
201-500 employees
Founded
2018
Industry
Technology
Glassdoor Rating
4.2 / 5
Leadership Team
Sarah Johnson
Chief Executive Officer
Michael Chen
Chief Technology Officer
Emily Williams
VP of Engineering
David Rodriguez
VP of Product
Jessica Thompson
Chief Financial Officer
Andrew Park
VP of Sales
Unlock Company Insights
View leadership team, funding history,
and employee contacts for Customer.io.
Salary
$150k – $200k
per year
More jobs at Customer.io
Similar Jobs
Member of Technical Staff, Software Engineer
Fireworks AI
Software Engineer - Backend
OneCrew
Software Developer II - Full-Stack (Backend Focus)
KOHO
Senior Software Engineer - Backend
OneCrew
Staff Software Engineer- Sr. Consultant (AI Agent/ Agentic Focus)
Visa
Senior Backend Engineer (C++ / PHP)
Lifted, an Upwork Company™