# Companies using Jest

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.

Data as of November 9, 2026. Source: Sumble.

## Which companies name Jest in the most job posts?

EPAM Systems, Tata Consultancy Services and IBM mention Jest in the most job posts. Three of these five companies are in Professional Services.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [EPAM Systems](https://sumble.com/orgs/epam-systems) | 1,668 | 851 | "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 Services](https://sumble.com/orgs/tata-consultancy-services-tcs) | 857 | 752 | "Implement unit testing using JUnit/Mockito for the backend and Jest/Enzyme/RTL for the frontend." (Java Full-Stack Developer, Nov 1, 2026) |
| [IBM](https://sumble.com/orgs/ibm) | 755 | 580 | "Write unit tests using Jest." (Frontend Software Engineer , UI Foundations - Confluent, Sep 7, 2026) |
| [Luxoft](https://sumble.com/orgs/luxoft) | 742 | 62 | "Component testing with Vitest or Jest, and visual regression or accessibility testing." (Senior Software Development Engineer in Test (SDET), Nov 6, 2026) |
| [JPMorganChase](https://sumble.com/orgs/jpmorgan-chase) | 698 | 674 | "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) |

## Is hiring for Jest growing?

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.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| 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.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 840 |
| June to August 2026 | 750 |
| October 2025 to August 2026 | 3,597 |

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 know | Companies | Share |
|---|---:|---:|
| Job posts name Jest | 25,044 | 34% |
| Employees' profiles list Jest | 47,615 | 66% |

## 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%.

| Size | Share | Typical tech page |
|---|---:|---:|
| 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.

| 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.

| Team | Companies |
|---|---:|
| Engineering | 658 |
| Development | 261 |
| Front-end development | 221 |
| Technology | 193 |
| QA | 152 |
| Product | 145 |

## 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.

| 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 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.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [AI Rudder](https://sumble.com/orgs/airudder) | 4 |
| AI native | [Future Secure AI](https://sumble.com/orgs/future-secure-ai) | 2 |
| AI native | [Dream](https://sumble.com/orgs/dreamsecurity) | 2 |
| AI native | [gnani.ai](https://sumble.com/orgs/gnani-innovations) | 2 |
| AI native | [Attus Procuradoria Digital](https://sumble.com/orgs/attus-ai) | 2 |
| Commercial | [Starian](https://sumble.com/orgs/somos-starian) | 6 |
| Commercial | [Lucanet](https://sumble.com/orgs/lucanet) | 6 |
| Commercial | [Zibber](https://sumble.com/orgs/zibber) | 5 |
| Commercial | [Robotiq](https://sumble.com/orgs/robotiq) | 5 |
| Commercial | [SKY ICT PCL.](https://sumble.com/orgs/skyict-pcl) | 5 |
| Mid-market | [Converse](https://sumble.com/orgs/converse) | 11 |
| Mid-market | [Access \| Information Management](https://sumble.com/orgs/access-information-management) | 8 |
| Mid-market | [Neighborly®](https://sumble.com/orgs/neighborly) | 7 |
| Mid-market | [The Davey Tree Expert Company](https://sumble.com/orgs/davey-tree) | 7 |
| Mid-market | [Comarch](https://sumble.com/orgs/comarch) | 4 |
| Enterprise | [PNC](https://sumble.com/orgs/pnc-financial-services-group) | 12 |
| Enterprise | [Abercrombie & Fitch Co.](https://sumble.com/orgs/abercrombie-&-fitch) | 8 |
| Enterprise | [Renesas Electronics](https://sumble.com/orgs/renesas) | 7 |
| Enterprise | [BDO USA, LLP](https://sumble.com/orgs/bdo-usa) | 4 |
| Enterprise | [Minerva Foods](https://sumble.com/orgs/minerva-foods-com) | 4 |

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.

## 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.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Enzyme | 2,389 | 11% | 0.4% | 28 times |
| Mocha | 5,607 | 27% | 1.1% | 25 times |
| Context API | 2,742 | 13% | 0.63% | 21 times |
| Zustand | 2,386 | 11% | 0.59% | 19 times |
| MobX | 1,894 | 9% | 0.51% | 18 times |
| Styled Components | 1,818 | 8.7% | 0.53% | 17 times |
| Jasmine | 2,816 | 13% | 0.89% | 15 times |
| Redux | 10,338 | 49% | 3.6% | 14 times |

Shares are out of the 20,935 companies whose job posts name Jest, not counting firms whose job posts name almost every technology.

## 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 theme | Job posts |
|---|---:|
| Digital Transformation | 8,104 |
| Microservices Migration | 2,574 |
| Frontend Migration | 2,332 |
| Generative AI | 605 |

## 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.