241 companies in our data use btrfs, and 130 of them name it in job posts they wrote. From October 2025 to August 2026, 109 job posts named it. It comes up most in Data Center Engineer job posts.
Oracle and NCR Voyix have the most job posts naming btrfs, with 89 and 47. NCR Corporation has named it in job posts the longest of the five companies in the table, since February 2023.
CompanyPostsRecent job post
OracleScientific and Technical Services · first seen Jun 202389
"Storage and Filesystems (iSCSI, Fibre Channel, NFS, ZFS, Btrfs, block layer, and filesystem layer)"Senior Principal Platform Software Engineer, Aug 27, 2026
NCR VoyixInformation · first seen Dec 202347
"Storage and file systems such as ZFS, DRBD, RAID, LVM, btrfs, or CEPH"Linux Shift Senior Support, Oct 22, 2026
NCR CorporationManufacturing · first seen Feb 202346
"Resilient and redundant file systems (ideally ZFS and DRBD, alternatively advanced knowledge of similar such as btrfs, LVM, RAID, CEPH, clustering solutions etc.)"Professional Services Engineer – Virtualization, Jan 21, 2026
DCI SolutionsProfessional Services · first seen Oct 202517
"Experience with ext4, XFS, Btrfs and knowing when to use each Knowledge of RAID levels and disk management techniques Experience deploying…"Storage Engineer with Security Clearance, Jun 3, 2026
Cohere Technology GroupProfessional Services · first seen Mar 202417
"…file formats (e.g., ELF), file system internals (e.g., NTFS, ext2, btrfs), OS-specific mandatory and discretionary access control mechanisms…"Android Developer with Security Clearance, Jul 27, 2026
0.03 in every 10,000 job posts named btrfs from June to August 2026, against 0.08 from March to May. These are small numbers of job posts, so a few companies can move them.
Show the data
Month
Job posts naming btrfs
All job posts
Per 10,000
Oct 2025
5
1,413,673
0.04
Nov 2025
12
1,822,119
0.07
Dec 2025
7
1,236,103
0.06
Jan 2026
13
1,828,002
0.07
Feb 2026
8
1,856,647
0.04
Mar 2026
15
1,850,711
0.08
Apr 2026
14
1,728,886
0.08
May 2026
16
1,821,509
0.09
Jun 2026
6
1,909,496
0.03
Jul 2026
6
1,815,180
0.03
Aug 2026
7
1,835,698
0.04
How many companies named btrfs in a job post for the first time in recent months?
From June to August 2026, 7 companies posted their first job naming btrfs; 12 did from March to May. Over the 11 months from October 2025, 31 companies posted their first job naming it.
March to May 202612
June to August 20267
October 2025 to August 202631
Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.
How do we know which companies use btrfs?
Employees' profiles add 111 companies to the 130 that name btrfs in job posts. 6 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name btrfs
13054%
Employees' profiles list btrfs
11146%
241 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use btrfs?
33% of btrfs users are companies with 50 to 999 employees, close to the mix on the typical tech page. 60 of its companies have fewer than 50 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
25%22%
50 to 999
33%38%
1,000 to 5,000
15%17%
Over 5,000
28%23%
Where are btrfs companies based?
More than half of btrfs companies are in the United States (51%). Germany is second, at 9.4%.
ShareTypical
United States
51%43%
Germany
9.4%4.4%
France
7.1%4.6%
United Kingdom
6.2%6.4%
Canada
3.6%3.6%
India
3.1%6.9%
Companies in 33 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
114
51%
43%
Germany
21
9.4%
4.4%
France
16
7.1%
4.6%
United Kingdom
14
6.2%
6.4%
Canada
8
3.6%
3.6%
India
7
3.1%
6.9%
What else do btrfs companies use?
Btrfs companies are 600 times as likely as similar companies to use ext4: 38% of them, against 0.06%. XFS is 439 times as common as usual, at 35%.
Share of the 69 btrfs companies counted here whose job posts also name the tool
Typical for companies the same size
Companies that named btrfs in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.
Which roles mention btrfs most?
Data Center Engineer is the most common role, in 17% of job posts naming btrfs. Mobile Developer is second, at 15%.
RoleSharePosts
Data Center Engineer
17%18
Mobile Developer
15%16
Infrastructure Engineer
13%14
Software Engineer
7.3%8
Customer Engineer
6.4%7
IT Support
5.5%6
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Data Center Engineer
17%
18
5
2
Mobile Developer
15%
16
10
3
Infrastructure Engineer
13%
14
7
2
Software Engineer
7.3%
8
2
1
Customer Engineer
6.4%
7
3
3
IT Support
5.5%
6
2
2
About this data
Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.
Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.
Sumble has a free plan, and the same data is available through its API and MCP server.
A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.
Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.
