72,659 companies in our data use Jest, and 25,044 of them name it in job posts they wrote. Hiring for it has slowed, though 27,186 job posts still named it from October 2025 to August 2026. Software Engineer is the role that names it most often.
EPAM Systems, Tata Consultancy Services and IBM mention Jest in the most job posts. Three of these five companies are in Professional Services.
CompanyPostsPeopleRecent job post
EPAM SystemsProfessional Services · first seen Aug 20221,668851
"Strong command of Git workflows, automated testing frameworks (e.g., Vitest, Jest, Playwright), CI/CD automation, and application observability/logging"Lead Shopify Software Engineer, Nov 7, 2026
Tata Consultancy ServicesProfessional Services · first seen Jul 2023857752
"Implement unit testing using JUnit/Mockito for the backend and Jest/Enzyme/RTL for the frontend."Java Full-Stack Developer, Nov 1, 2026
IBMInformation · first seen Oct 2022755580
"Write unit tests using Jest."Frontend Software Engineer , UI Foundations - Confluent, Sep 7, 2026
LuxoftProfessional Services · first seen Nov 202274262
"Component testing with Vitest or Jest, and visual regression or accessibility testing."Senior Software Development Engineer in Test (SDET), Nov 6, 2026
JPMorganChaseFinance and Insurance · first seen Jul 2022698674
"Automated testing for frontends including unit, integration, and end-to-end tests with Jest, React Testing Library, and Cypress, and visual regression testing and API contract testing;"Software Engineer [Multiple Positions Available], Oct 28, 2026
Job posts mentioning Jest went from 14 to 11 in every 10,000 job posts, comparing March to May with June to August 2026. August 2026 was its lowest month since October 2025, at 10.
Show the data
Month
Job posts naming Jest
All job posts
Per 10,000
Oct 2025
2,349
1,413,673
17
Nov 2025
3,320
1,822,119
18
Dec 2025
2,070
1,236,103
17
Jan 2026
2,966
1,828,002
16
Feb 2026
2,990
1,856,647
16
Mar 2026
2,661
1,850,711
14
Apr 2026
2,279
1,728,886
13
May 2026
2,407
1,821,509
13
Jun 2026
2,222
1,909,496
12
Jul 2026
2,031
1,815,180
11
Aug 2026
1,891
1,835,698
10
How many companies named Jest in a job post for the first time in recent months?
Jest showed up in job posts at 750 companies for the first time from June to August 2026, and 840 in the three months before. The 750 from June to August are 3% of all 25,044 companies whose job posts name it.
March to May 2026840
June to August 2026750
October 2025 to August 20263,597
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 Jest?
25,044 companies name Jest in their own job posts. The other 47,615 show up because employees list it on their profiles. 9,395 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name Jest
25,04434%
Employees' profiles list Jest
47,61566%
72,659 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use Jest?
Jest skews toward smaller firms. 45% of its users are companies with fewer than 50 employees, against 22% on the typical tech page. The second-largest group is companies with 50 to 999 employees, at 42%.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
45%22%
50 to 999
42%38%
1,000 to 5,000
8.1%17%
Over 5,000
4.2%23%
Where are Jest companies based?
Poland is 10 times as common among Jest companies as on the typical tech page, at 6.2%. The United States leads overall with 30%. Its companies are based in 177 countries and territories.
ShareTypical
United States
30%43%
India
7.9%6.9%
United Kingdom
7%6.4%
Poland
6.2%0.63%
Brazil
6.2%2.8%
Germany
4.5%4.4%
Companies in 177 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
20,798
30%
43%
India
5,397
7.9%
6.9%
United Kingdom
4,809
7%
6.4%
Poland
4,251
6.2%
0.63%
Brazil
4,229
6.2%
2.8%
Germany
3,092
4.5%
4.4%
Which teams work with Jest?
Job posts for Jest point to engineering teams far more than any other, at 658 companies. Development teams are second, at 261 companies, and front-end development teams third, at 221.
TeamCompanies
Engineering
658
Development
261
Front-end development
221
Technology
193
QA
152
Product
145
What else do Jest companies use?
Enzyme, Mocha and Context API show up far more often at Jest companies than at companies of the same size. Among the tools listed here, Redux is the most widely used, at 49% of Jest companies.
Share of the 20,935 Jest companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming Jest in job posts recently?
Between April and August 2026, Jest appeared for the first time in job posts at 641 companies: 465 commercial, 106 mid-market and 70 enterprise. PNC has the most job posts of the new enterprise companies, 12 from April to August.
Companies that named Jest 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 Jest most?
Software Engineer is the most common role, in 46% of job posts naming Jest. The top four roles cover 82% of these job posts.
RoleSharePosts
Software Engineer
46%12,425
Frontend Engineer
28%7,528
Software Development Engineer in Test
4.7%1,290
Mobile Developer
4%1,094
Engineer
0.96%260
AI Engineer
0.93%254
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Software Engineer
46%
12,425
3,092
2,755
Frontend Engineer
28%
7,528
1,921
1,363
Software Development Engineer in Test
4.7%
1,290
315
300
Mobile Developer
4%
1,094
277
207
Engineer
0.96%
260
72
53
AI Engineer
0.93%
254
59
96
Which project themes come up in Jest job posts?
Setting aside broad digital transformation, Microservices Migration is the theme teams hiring for Jest mention most, in 2,574 job posts. Broad digital transformation work shows up in 8,104 of its job posts.
Project themeJob posts
Digital Transformation8,104
Microservices Migration2,574
Frontend Migration2,332
Generative AI605
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.
