Customer.io tech stack
Customer.io builds mostly with JavaScript, Go, Python, SQL. Its stack also includes GCP, AWS, MySQL, Snowflake. JavaScript is named in 6 of the 21 job postings Customer.io published in the last 12 months (29%). Counted by Alion from the job postings of Customer.io, updated Oct 12, 2026.
What programming languages does Customer.io use?
JavaScript is named in 29% of job postings at Customer.io, followed by Go (24%), Python (19%), SQL (14%).
JavaScript
6 29%
Go
5 24%
Python
4 19%
SQL
3 14%
TypeScript
2 10%
Apex
1 5%
Kotlin
1 5%
Node JS
1 5%
Show all (9)
What frameworks and libraries does Customer.io use?
React.js is named in 14% of job postings at Customer.io, followed by FastAI (5%), PyTorch (5%).
What databases does Customer.io use?
MySQL is named in 19% of job postings at Customer.io, followed by Snowflake (14%), BigQuery (5%), Google BigQuery (5%).
MySQL
4 19%
Snowflake
3 14%
BigQuery
1 5%
Google BigQuery
1 5%
DynamoDB
1 5%
Google Bigtable
1 5%
PostgreSQL
1 5%
What cloud and platforms does Customer.io use?
GCP is named in 29% of job postings at Customer.io, followed by AWS (24%), Okta (10%), DLP (5%).
What developer tools does Customer.io use?
Cursor is named in 10% of job postings at Customer.io, followed by Model Context Protocol (10%), dbt (10%), Lovable (5%).
Cursor
2 10%
Model Context Protocol
2 10%
dbt
2 10%
What AI and ML technologies does Customer.io use?
Claude is named in 19% of job postings at Customer.io, followed by ChatGPT (5%), LLM (5%).
Which engineering practices does Customer.io ask for?
AI Agents is named in 57% of job postings at Customer.io, followed by A/B Testing (5%), Function Calling (5%), Machine Learning (5%).
AI Agents
12 57%
Function Calling
1 5%
Platform Engineering
1 5%
Prompt Engineering
1 5%
RAG
1 5%
What does each Customer.io team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
6 postingsHow does your stack fit Customer.io?
How is the Customer.io stack changing?
Read from the dates of the postings themselves: a technology is new when the first posting that names it appeared in the last six months, rising or falling when its share of postings moved between the last two quarters.
How modern is the Customer.io stack?
Customer.io scores 90 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 3; legacy ones: 0.
How common is the Customer.io stack in its industry?
Share of the 1,981 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Customer.io
Questions about the Customer.io tech stack
What programming languages does Customer.io use?
The languages named in Customer.io job postings are JavaScript (29%), Go (24%), Python (19%), SQL (14%), TypeScript (10%), as a share of the 21 postings of the last 12 months.
Does Customer.io use React.js?
Yes. React.js is named in 3 of 21 job postings (14%) and required in 3 of them.
What cloud and platforms does Customer.io use?
The cloud and platforms named in Customer.io job postings are GCP (6), AWS (5), Okta (2) (postings in brackets).
What skills do you need for a Backend job at Customer.io?
Backend postings at Customer.io most often require Go (4), AWS (3), GCP (3), MySQL (3), out of 6 postings in the last 12 months.
Is the Customer.io tech stack changing?
Yes. Cursor first appeared in Customer.io job postings in the last six months.
How modern is the Customer.io tech stack?
Customer.io scores 90 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 3; legacy ones: 0.
How does Alion know the Customer.io tech stack?
Alion reads every job posting Customer.io publishes and tags the technologies each one names. The figures on this page count the 21 postings of the last 12 months and were updated on Oct 12, 2026.
Method and citation
Alion reads every job posting the company publishes and tags the technologies each one names. Shares count the postings of the last 12 months, open and closed; the company's own products are counted apart. How we count
Alion, "Customer.io tech stack: 45 technologies from 21 job postings", as of Oct 12, 2026. https://alion.io/company/customer-io/technologies