CESI tech stack
CESI builds mostly with Python, JavaScript. Its stack also includes PyTorch, TensorFlow, GitHub Actions, arXiv. Python is named in 4 of the 5 job postings CESI published in the last 12 months (80%). Counted by Alion from the job postings of CESI, updated Oct 2, 2026.
What programming languages does CESI use?
Python is named in 80% of job postings at CESI, followed by JavaScript (20%).
Python
4 80%
JavaScript
1 20%
What frameworks and libraries does CESI use?
PyTorch is named in 40% of job postings at CESI, followed by TensorFlow (40%), Aiohttp (20%), HTTPX (20%).
PyTorch
2 40%
TensorFlow
2 40%
Aiohttp
1 20%
HTTPX
1 20%
LIME
1 20%
PyG
1 20%
Streamlit
1 20%
Transformers
1 20%
What cloud and platforms does CESI use?
GitHub Actions is named in 20% of job postings at CESI, followed by arXiv (20%).
GitHub Actions
1 20%
What developer tools does CESI use?
Git is named in 20% of job postings at CESI, followed by Rest API (20%).
Which engineering practices does CESI ask for?
Digital Twin is named in 60% of job postings at CESI, followed by Machine Learning (40%), Anomaly Detection (20%), CI/CD (20%).
Anomaly Detection
1 20%
CI/CD
1 20%
Explainable AI
1 20%
Federated Learning
1 20%
GAN
1 20%
Show all (17)
What other technologies does CESI use?
Abstract is named in 20% of job postings at CESI.
Abstract
1 20%
What does each CESI team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Early Careers
4 postingsHow does your stack fit CESI?
How is the CESI 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 CESI stack?
CESI scores 61 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 CESI stack in its industry?
Share of the 2,976 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like CESI
Questions about the CESI tech stack
What programming languages does CESI use?
The languages named in CESI job postings are Python (80%), JavaScript (20%), as a share of the 5 postings of the last 12 months.
Does CESI use PyTorch?
Yes. PyTorch is named in 2 of 5 job postings (40%) and required in 2 of them.
What cloud and platforms does CESI use?
The cloud and platforms named in CESI job postings are GitHub Actions (1), arXiv (1) (postings in brackets).
What skills do you need for a Early Careers job at CESI?
Early Careers postings at CESI most often require Python (3), PyTorch (2), TensorFlow (2), out of 4 postings in the last 12 months.
Is the CESI tech stack changing?
Yes. Machine Learning, PyTorch, TensorFlow first appeared in CESI job postings in the last six months.
How modern is the CESI tech stack?
CESI scores 61 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 CESI tech stack?
Alion reads every job posting CESI publishes and tags the technologies each one names. The figures on this page count the 5 postings of the last 12 months and were updated on Oct 2, 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, "CESI tech stack: 33 technologies from 5 job postings", as of Oct 2, 2026. https://alion.io/company/cesi-fr/technologies