Company profile

Customer.io Tech Stack

Data-driven messaging automation across email, SMS, push and in-app

Software Development Portland, Oregon 201–500 employees Founded 2012 Privately Held

Customer.io runs a multichannel customer messaging platform on Go, TypeScript and React, with data spread across MySQL, PostgreSQL, DynamoDB and Bigtable on both AWS and GCP, a footprint built for high-volume event processing. Projects on AI agent infrastructure, evals and RAG/MCP tooling show AI moving into core engineering workflows, while a senior-weighted, engineering-and-sales-led hiring mix points to a push upmarket into mid-market and enterprise accounts.

Tech Stack 58 technologies

Core StackGo React TypeScript AWS MySQL Slack n8n Python Node.js RAG Zapier PostgreSQL DynamoDB Salesforce JavaScript Kubernetes Stripe Swift Kotlin Ember.js GCP Linear Ramp Notion 1Password Kandji MCP Smarty Bigtable Salesforce Flow+27 more

What Customer.io Is BuildingChallenges and projects from their job posts

◆Challenges

Platform reliability, scalability and data quality
Scaling operations with a growing customer base
Mitigating customer churn
Hard-to-fill engineering roles
Reducing financial close cycle time
Automating operational friction in IT operations

▲Active Projects

Distributed systems for messaging at scale
AI agents for multi-file changes, with evals
Commercial strategy for mid-market and enterprise accounts
GTM integrations
Full-stack features powering key customer workflows
Treasury operations and FX monitoring

Hiring Activity

Steady35 roles · 8 in 30d

Department

Engineering

Sales

Finance

Ops

Data

Product

Design

Seniority

Senior

Mid

Manager

Staff

Director

Principal

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About Customer.io

Customer.io is a privately held software company headquartered in Portland, Oregon, founded in 2012, with 201–500 employees. It provides a customer engagement platform that lets businesses automate personalized messages across email, SMS, push notifications, in-app messages and webhooks, triggered by real-time customer data. The product serves marketing and lifecycle teams focused on retention and engagement across web and mobile. Its native mobile stack includes Swift and Kotlin, and hiring is concentrated in the United States.

HeadquartersPortland, Oregon

Company Size201–500 employees

Founded2012

Hiring MarketsUnited States

Frequently Asked Questions

What tech stack does Customer.io use?

Customer.io builds with Go, TypeScript, React, Ember.js, Python and Node.js, runs on AWS, GCP and Kubernetes, and stores data in MySQL, PostgreSQL, DynamoDB and Bigtable. Business tools include Salesforce, Stripe and Linear.

Is Customer.io hiring engineers?

Yes. Engineering is its largest hiring area, with demand skewed toward senior talent, followed by sales, finance, HR and operations. Hiring is steady and focused in the United States.

What is Customer.io working on?

Current work includes distributed systems for messaging at scale, AI agents for multi-file code changes with agent infrastructure and evals, GTM integrations, and a commercial strategy for mid-market and enterprise accounts.

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How this profile is built

Customer.io's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.