EFR tech stack
EFR builds mostly with C#, JavaScript, Python. Its stack also includes GitLab, Linux, MySQL, PostgreSQL. GitLab is named in 2 of the 3 job postings EFR published in the last 12 months (67%). Counted by Alion from the job postings of EFR, updated Oct 21, 2026.
What programming languages does EFR use?
C# is named in 33% of job postings at EFR, followed by JavaScript (33%), Python (33%).
What frameworks and libraries does EFR use?
Playwright is named in 33% of job postings at EFR, followed by Robot Framework (33%), Selenium (33%).
What databases does EFR use?
MySQL is named in 33% of job postings at EFR, followed by PostgreSQL (33%).
MySQL
1 33%
PostgreSQL
1 33%
What cloud and platforms does EFR use?
GitLab is named in 67% of job postings at EFR, followed by Linux (67%), .NET (33%), Amazon S3 (33%).
What developer tools does EFR use?
Adobe Photoshop is named in 33% of job postings at EFR, followed by Canva (33%), Wireshark (33%).
Which engineering practices does EFR ask for?
CI/CD is named in 67% of job postings at EFR, followed by DNS (33%).
CI/CD
2 67%
How does your stack fit EFR?
How modern is the EFR stack?
EFR scores 75 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: 0; legacy ones: 0.
How common is the EFR stack in its industry?
Share of the 612 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like EFR
Questions about the EFR tech stack
What programming languages does EFR use?
The languages named in EFR job postings are C# (33%), JavaScript (33%), Python (33%), as a share of the 3 postings of the last 12 months.
Does EFR use GitLab?
Yes. GitLab is named in 2 of 3 job postings (67%) and required in 2 of them.
What cloud and platforms does EFR use?
The cloud and platforms named in EFR job postings are GitLab (2), Linux (2), .NET (1) (postings in brackets).
Is the EFR tech stack changing?
No new technology has appeared in EFR job postings in the last six months.
How modern is the EFR tech stack?
EFR scores 75 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: 0; legacy ones: 0.
How does Alion know the EFR tech stack?
Alion reads every job posting EFR publishes and tags the technologies each one names. The figures on this page count the 3 postings of the last 12 months and were updated on Oct 21, 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, "EFR tech stack: 19 technologies from 3 job postings", as of Oct 21, 2026. https://alion.io/company/efr-de/technologies