7,279 companies in our data use F#, and 973 of them name it in job posts they wrote. 577 job posts named it from October 2025 to August 2026. Software Engineer is the role that names it most often.
Infosys, Genetec and Anduril Industries mention F# in the most job posts. Of the five companies in the table, SimCorp has the most employees who list it on their profiles: 30.
CompanyPostsPeopleRecent job post
InfosysProfessional Services · first seen Jun 20232123
"Design, develop, and enhance software solutions using .NET Core programming languages, including C#, F#, and Visual Basic.".net lead, Oct 22, 2026
GenetecScientific and Technical Services · first seen Oct 20228325
"Using functional and object-oriented programming languages (we program in F# and C#, and yes, we're happy to teach you) "Software developer - access control, Nov 1, 2026
Anduril IndustriesManufacturing · first seen Sep 2022710
"Experience (professional or in the setting of an open source community) working with typed functional programming languages (Haskell, Scala, F#, OCaml, Rust, etc.)"embedded haskell engineer, ew, Jul 7, 2026
SimCorpScientific and Technical Services · first seen Oct 20225730
"Experience with OCaml or other functional languages (Haskell, Scala, F#, or similar), domain-specific languages, Web APIs, or financial software would be useful - but you do not…"Senior Software Engineer – OCaml/C# – OTC Core, Nov 7, 2026
HalliburtonUtilities · first seen Mar 2024486
"Familiar with programming languages such as C#, F#, JavaScript is a plus"Principal Software Developer - Python, Nov 7, 2026
From March to May 2026, 0.20 in every 10,000 job posts named F#; from June to August, 0.30 in every 10,000 job posts. These are small numbers of job posts, so a few companies can move them.
Show the data
Month
Job posts naming F#
All job posts
Per 10,000
Oct 2025
71
1,413,673
0.50
Nov 2025
66
1,822,119
0.36
Dec 2025
44
1,236,103
0.36
Jan 2026
73
1,828,002
0.40
Feb 2026
48
1,856,647
0.26
Mar 2026
26
1,850,711
0.14
Apr 2026
32
1,728,886
0.19
May 2026
50
1,821,509
0.27
Jun 2026
65
1,909,496
0.34
Jul 2026
46
1,815,180
0.25
Aug 2026
56
1,835,698
0.31
How many companies named F# in a job post for the first time in recent months?
F# showed up in job posts at 25 companies for the first time from June to August 2026, and 16 in the three months before. Of the 973 companies whose job posts name it, 2.6% first named it from June to August.
March to May 202616
June to August 202625
October 2025 to August 202684
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 F#?
87% of the companies here are known from employees' profiles alone, and 13% name F# in their own job posts. 286 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name F#
97313%
Employees' profiles list F#
6,30687%
7,279 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use F#?
F# skews toward smaller firms. 28% of its users are companies with fewer than 50 employees, against 22% on the typical tech page. 1,055 of its companies have more than 5,000 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
28%22%
50 to 999
41%38%
1,000 to 5,000
16%17%
Over 5,000
14%23%
Where are F# companies based?
Denmark is 8.1 times as common among F# companies as on the typical tech page, at 5.6%. The United States leads overall with 38%. Its companies are based in 110 countries and territories.
ShareTypical
United States
38%43%
United Kingdom
9.6%6.4%
Denmark
5.6%0.69%
Germany
4.6%4.4%
France
3.2%4.6%
Sweden
3%1%
Companies in 110 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
2,674
38%
43%
United Kingdom
669
9.6%
6.4%
Denmark
388
5.6%
0.69%
Germany
321
4.6%
4.4%
France
221
3.2%
4.6%
Sweden
212
3%
1%
Which teams work with F#?
At 17 companies, the team named in F# job posts is engineering, at least twice the next. IT and platform teams come next, at 8 companies each.
TeamCompanies
Engineering
17
IT
8
Platform
8
Development
7
R&D
7
Software development
6
What else do F# companies use?
The tool most tied to F# is OCaml. 10% of F# companies use it, 163 times the usual rate for their size. Haskell is 117 times as common as usual, at 20%.
Share of the 634 F# companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming F# in job posts recently?
19 companies with 50 or more employees started naming F# in job posts between April and August 2026. 4 of them have more than 5,000 employees. Allstate leads the new enterprise companies, with 7 job posts from April to August.
Companies that named F# 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 F# most?
Software Engineer job posts naming F# grew the fastest among its top roles: 96 from June to August 2026, up from 56 from March to May. The top four roles cover 67% of these job posts.
RoleSharePosts
Software Engineer
61%352
Embedded Engineer
2.3%13
Software Development Engineer in Test
1.9%11
Systems Engineer
1.7%10
Business Systems
1.4%8
Data Engineer
1.4%8
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Software Engineer
61%
352
56
96
Embedded Engineer
2.3%
13
2
1
Software Development Engineer in Test
1.9%
11
5
3
Systems Engineer
1.7%
10
2
0
Business Systems
1.4%
8
1
0
Data Engineer
1.4%
8
2
1
Which project themes come up in F# job posts?
Apart from broad digital transformation work, Microservices Migration comes up most in job posts naming F#, in 72 of them. After that comes Cloud Cost Optimization, with 33.
Project themeJob posts
Digital Transformation375
Microservices Migration72
Cloud Cost Optimization33
Data Infrastructure Migration29
"Lead the design and implementation of new microservices and APIs using F# and the .NET framework, prioritizing immutability, concurrency, and correctness."
KMS Technology, Inc., Senior Full stack Software Engineer - F#, Dec 16, 2025
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.
