CERN tech stack
CERN builds mostly with Python, C++, JavaScript, SQL. Its stack also includes Linux, Kubernetes, React.js, OpenSearch. Python is named in 66 of the 97 job postings CERN published in the last 12 months (68%). Counted by Alion from the job postings of CERN, updated Nov 11, 2026.
What programming languages does CERN use?
Python is named in 68% of job postings at CERN, followed by C++ (23%), JavaScript (13%), SQL (10%).
Python
66 68%
C++
22 23%
JavaScript
13 13%
SQL
10 10%
Verilog
7 7%
PHP
6 6%
SystemVerilog
5 5%
VHDL
5 5%
Show all (16)
What frameworks and libraries does CERN use?
React.js is named in 8% of job postings at CERN, followed by CUDA (4%), Spring Boot (3%), Angular (2%).
React.js
8 8%
Spring Boot
3 3%
Angular
2 2%
Django
2 2%
Flask
2 2%
Laravel
2 2%
Vue.js
2 2%
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What databases does CERN use?
OpenSearch is named in 5% of job postings at CERN, followed by Oracle (5%), MySQL (4%), PostgreSQL (4%).
What cloud and platforms does CERN use?
Linux is named in 34% of job postings at CERN, followed by Kubernetes (25%), GitLab (6%), GitLab CI (6%).
Kubernetes
24 25%
GitLab
6 6%
GitLab CI
6 6%
OpenShift
5 5%
Grafana
4 4%
Power BI
3 3%
Show all (25)
What developer tools does CERN use?
Git is named in 15% of job postings at CERN, followed by Docker (11%), Puppet (8%), Helm (8%).
Show all (30)
Which engineering practices does CERN ask for?
CI/CD is named in 31% of job postings at CERN, followed by HPC (11%), Machine Learning (8%), Configuration Management (6%).
CI/CD
30 31%
HPC
11 11%
GitOps
2 2%
AI Agents
1 1%
Anomaly Detection
1 1%
Show all (22)
What does each CERN team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
18 postingsDevOps
17 postingsIndustrial Engineering
15 postingsHardware
11 postingsScience & Research
10 postingsField & Service
4 postingsHow does your stack fit CERN?
How much does CERN pay by technology?
Median stated pay of the postings that name each technology, against the median of all CERN postings with stated pay: $101k across 84 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Python | 56 | $102k | 0% |
| Linux | 26 | $102k | +1% |
| C++ | 22 | $102k | +1% |
| Kubernetes | 20 | $86k | −16% |
| JavaScript | 13 | $86k | −15% |
| SQL | 9 | $104k | +3% |
| React.js | 8 | $85k | −16% |
| Verilog | 7 | $102k | +1% |
| SystemVerilog | 5 | $102k | +1% |
| Java | 5 | $102k | 0% |
How is the CERN 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 CERN stack?
CERN scores 72 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 1; legacy ones: 0.
How common is the CERN stack in its industry?
Share of the 663 companies in the same industries, whose stack Alion knows, that use each technology.
What sets CERN apart
Companies with a stack like CERN
Questions about the CERN tech stack
What programming languages does CERN use?
The languages named in CERN job postings are Python (68%), C++ (23%), JavaScript (13%), SQL (10%), Verilog (7%), as a share of the 97 postings of the last 12 months.
Does CERN use React.js?
Yes. React.js is named in 8 of 97 job postings (8%) and required in 4 of them.
What cloud and platforms does CERN use?
The cloud and platforms named in CERN job postings are Linux (33), Kubernetes (24), GitLab (6) (postings in brackets).
What skills do you need for a Backend job at CERN?
Backend postings at CERN most often require Kubernetes (10), Python (8), JavaScript (7), Docker (4), out of 18 postings in the last 12 months.
Is the CERN tech stack changing?
Yes. Vue.js, CATIA first appeared in CERN job postings in the last six months.
How modern is the CERN tech stack?
CERN scores 72 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 1; legacy ones: 0.
How does Alion know the CERN tech stack?
Alion reads every job posting CERN publishes and tags the technologies each one names. The figures on this page count the 97 postings of the last 12 months and were updated on Nov 11, 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, "CERN tech stack: 116 technologies from 97 job postings", as of Nov 11, 2026. https://alion.io/company/cern/technologies