CircleCI tech stack
CircleCI builds mostly with Go, TypeScript, Python, JavaScript. Its stack also includes Hugging Face, Datadog, React.js, Snowflake. Hugging Face is named in 18 of the 18 job postings CircleCI published in the last 12 months (100%). Counted by Alion from the job postings of CircleCI, updated Oct 8, 2026.
What programming languages does CircleCI use?
Go is named in 39% of job postings at CircleCI, followed by TypeScript (33%), Python (11%), JavaScript (11%).
What frameworks and libraries does CircleCI use?
React.js is named in 11% of job postings at CircleCI.
React.js
2 11%
What databases does CircleCI use?
Snowflake is named in 6% of job postings at CircleCI.
Snowflake
1 6%
What cloud and platforms does CircleCI use?
Hugging Face is named in 100% of job postings at CircleCI, followed by Datadog (33%), Honeycomb (33%), AWS (11%).
Datadog
6 33%
Honeycomb
6 33%
AWS
2 11%
Azure
2 11%
GCP
2 11%
GitHub Actions
1 6%
GitLab CI
1 6%
Show all (9)
What developer tools does CircleCI use?
Terraform is named in 11% of job postings at CircleCI, followed by Jenkins (6%), Microsoft Excel (6%).
What AI and ML technologies does CircleCI use?
Claude is named in 17% of job postings at CircleCI, followed by LLM (17%).
Which engineering practices does CircleCI ask for?
CI/CD is named in 100% of job postings at CircleCI, followed by AI Agents (44%), Multi-Agent Systems (6%), Prompt Engineering (6%).
What does each CircleCI team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
5 postingsHow does your stack fit CircleCI?
How is the CircleCI 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 CircleCI stack?
CircleCI scores 85 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: 2; legacy ones: 0.
How common is the CircleCI stack in its industry?
Share of the 3,680 companies in the same industries, whose stack Alion knows, that use each technology.
What sets CircleCI apart
CircleCI products in its job postings
Postings at CircleCI name its own products. They describe what the company makes, so they are left out of the stack above.
Companies with a stack like CircleCI
Questions about the CircleCI tech stack
What programming languages does CircleCI use?
The languages named in CircleCI job postings are Go (39%), TypeScript (33%), Python (11%), JavaScript (11%), as a share of the 18 postings of the last 12 months.
Does CircleCI use React.js?
Yes. React.js is named in 2 of 18 job postings (11%) and required in 1 of them.
What cloud and platforms does CircleCI use?
The cloud and platforms named in CircleCI job postings are Hugging Face (18), Datadog (6), Honeycomb (6) (postings in brackets).
What skills do you need for a Backend job at CircleCI?
Backend postings at CircleCI most often require Datadog (5), Go (5), Honeycomb (5), Hugging Face (5), out of 5 postings in the last 12 months.
Is the CircleCI tech stack changing?
Yes. React.js, JavaScript, Claude, LLM first appeared in CircleCI job postings in the last six months.
How modern is the CircleCI tech stack?
CircleCI scores 85 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: 2; legacy ones: 0.
How does Alion know the CircleCI tech stack?
Alion reads every job posting CircleCI publishes and tags the technologies each one names. The figures on this page count the 18 postings of the last 12 months and were updated on Oct 8, 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, "CircleCI tech stack: 24 technologies from 18 job postings", as of Oct 8, 2026. https://alion.io/company/circleci/technologies