Refeyn tech stack
Refeyn builds mostly with C++, Python, MATLAB, Rust. Its stack also includes GitHub Actions, Matplotlib, NumPy. C++ is named in 3 of the 8 job postings Refeyn published in the last 12 months (38%). Counted by Alion from the job postings of Refeyn, updated Nov 8, 2026.
What programming languages does Refeyn use?
C++ is named in 38% of job postings at Refeyn, followed by Python (38%), MATLAB (25%), Rust (13%).
What frameworks and libraries does Refeyn use?
Matplotlib is named in 13% of job postings at Refeyn, followed by NumPy (13%), PySide6 (13%), PyTorch (13%).
PySide6 
What cloud and platforms does Refeyn use?
GitHub Actions is named in 13% of job postings at Refeyn.
GitHub Actions
1 13%
What developer tools does Refeyn use?
Git is named in 13% of job postings at Refeyn, followed by Mandiant capa (13%), Microsoft Excel (13%), Mypy (13%).
Which engineering practices does Refeyn ask for?
GMP is named in 25% of job postings at Refeyn, followed by CI/CD (13%), Design Controls (13%), Machine Learning (13%).
How does your stack fit Refeyn?
How is the Refeyn 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 Refeyn stack?
Refeyn scores 67 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: 0; legacy ones: 0.
How common is the Refeyn stack in its industry?
Share of the 198 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Refeyn
Questions about the Refeyn tech stack
What programming languages does Refeyn use?
The languages named in Refeyn job postings are C++ (38%), Python (38%), MATLAB (25%), Rust (13%), as a share of the 8 postings of the last 12 months.
What cloud and platforms does Refeyn use?
The cloud and platforms named in Refeyn job postings are GitHub Actions (1) (postings in brackets).
Is the Refeyn tech stack changing?
Yes. C++, Python, MATLAB first appeared in Refeyn job postings in the last six months.
How modern is the Refeyn tech stack?
Refeyn scores 67 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: 0; legacy ones: 0.
How does Alion know the Refeyn tech stack?
Alion reads every job posting Refeyn publishes and tags the technologies each one names. The figures on this page count the 8 postings of the last 12 months and were updated on Nov 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, "Refeyn tech stack: 23 technologies from 8 job postings", as of Nov 8, 2026. https://alion.io/company/refeyn/technologies