# Companies using Vert.x

We found 3,545 companies that use Vert.x. 647 of them name it in their own job posts, and the rest through employees' public profiles. Its share of job posts is shrinking, though 708 job posts still named it from October 2025 to August 2026. Software Engineer roles mention it most.

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

## Which companies name Vert.x in the most job posts?

American Express has posted more jobs naming Vert.x than any other company: 566. Intuit is the newest of the five companies in the table, with its first job post naming it in February 2024.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [American Express](https://sumble.com/orgs/american-express) | 566 | 303 | "…development, leveraging technologies such as Java, Node.js, REST APIs, React, Vert.x, Kubernetes, and Red Hat OpenShift." (Senior Software Engineer I, Oct 24, 2026) |
| [Citi](https://sumble.com/orgs/citi) | 175 | 12 | "Multiple years of experience with frameworks like Spring Boot, Quarkus, Micronaut, or Vert.x" (senior java developer vp, Nov 7, 2026) |
| [Webnet](https://sumble.com/orgs/webnet) | 170 | 0 | ", Quarkus, Struts, Kotlin ou encore Vert.x" (java developer m/f, Nov 1, 2026) |
| [Intuit](https://sumble.com/orgs/intuit) | 163 | 33 | "Experience with AI technologies like SageMaker, Vert.x, LangChain, Large Language Models, Prompt Engineering, DialogFlow, Python" (Senior Staff Software Developer, Nov 7, 2026) |
| [Warner Bros. Discovery](https://sumble.com/orgs/warner-bros-discovery) | 100 | 13 | "Hands-on experience with frameworks such as Spring WebFlux, Vert.x, Node.js." (Senior Software Engineer, Oct 7, 2026) |

## Is hiring for Vert.x growing?

Job posts mentioning Vert.x went from 0.41 to 0.26 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 0.25.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 64 | 1,413,673 | 0.45 |
| Nov 2025 | 72 | 1,822,119 | 0.40 |
| Dec 2025 | 64 | 1,236,103 | 0.52 |
| Jan 2026 | 66 | 1,828,002 | 0.36 |
| Feb 2026 | 74 | 1,856,647 | 0.40 |
| Mar 2026 | 87 | 1,850,711 | 0.47 |
| Apr 2026 | 73 | 1,728,886 | 0.42 |
| May 2026 | 61 | 1,821,509 | 0.33 |
| Jun 2026 | 54 | 1,909,496 | 0.28 |
| Jul 2026 | 48 | 1,815,180 | 0.26 |
| Aug 2026 | 45 | 1,835,698 | 0.25 |

## How many companies named Vert.x in a job post for the first time in recent months?

In the three months to August 2026, 16 companies posted about Vert.x for the first time. From March to May, 20 did. That brings the companies naming it for the first time since October 2025 to 87, through August 2026.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 20 |
| June to August 2026 | 16 |
| October 2025 to August 2026 | 87 |

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 Vert.x?

Most of these companies come from employees' profiles: 82% have no job post naming Vert.x. 647 name it in their own job posts.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name Vert.x | 647 | 18% |
| Employees' profiles list Vert.x | 2,898 | 82% |

## What size are the companies that use Vert.x?

No size of company stands out for Vert.x. Companies with 50 to 999 employees make up the largest group, at 41%. 735 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 20% | 22% |
| 50 to 999 | 41% | 38% |
| 1,000 to 5,000 | 18% | 17% |
| Over 5,000 | 21% | 23% |

## Where are Vert.x companies based?

Brazil is 1.7 times as common among Vert.x companies as on the typical tech page, at 4.7%. The United States leads overall with 34%. India is second, at 6.7%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 1,135 | 34% | 43% |
| India | 226 | 6.7% | 6.9% |
| Germany | 222 | 6.6% | 4.4% |
| United Kingdom | 185 | 5.5% | 6.4% |
| Brazil | 158 | 4.7% | 2.8% |
| France | 158 | 4.7% | 4.6% |

## Which teams work with Vert.x?

Job posts for Vert.x point to engineering teams far more than any other, at 12 companies.

| Team | Companies |
|---|---:|
| Engineering | 12 |
| Technology | 6 |
| R&D | 4 |
| Technology organization | 4 |
| Development | 3 |
| DevOps | 3 |

## Which roles mention Vert.x most?

Most job posts naming Vert.x are for one kind of role. Software Engineer accounts for 69%. Software Engineer posts naming it numbered 139 from March to May 2026 and 88 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Software Engineer | 69% | 490 | 139 | 88 |
| Athletic Director | 2.3% | 16 | 3 | 13 |
| Consultant | 2.3% | 16 | 4 | 7 |
| Data Engineer | 2.3% | 16 | 6 | 3 |
| Software Architect | 1.4% | 10 | 2 | 1 |
| Operations | 1.3% | 9 | 7 | 0 |

## Which companies started naming Vert.x in job posts recently?

Between April and August 2026, 23 companies with 50 or more employees first named Vert.x in a job post, 5 of them with more than 5,000 employees. Rohde & Schwarz has the most job posts of the new enterprise companies, 5 from April to August.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Canopy](https://sumble.com/orgs/canopy-tax) | 2 |
| Commercial | [Parser](https://sumble.com/orgs/parser) | 2 |
| Commercial | [Rezolve Ai](https://sumble.com/orgs/rezolve) | 1 |
| Commercial | [MST HOLDING](https://sumble.com/orgs/mstholding) | 1 |
| Commercial | [DigitalRoute](https://sumble.com/orgs/digitalroute) | 1 |
| Mid-market | [MasOrange](https://sumble.com/orgs/masorange) | 2 |
| Mid-market | [Ticketmaster](https://sumble.com/orgs/ticketmaster) | 2 |
| Mid-market | [HARMAN India](https://sumble.com/orgs/harman-connected-services-corporation-india) | 2 |
| Mid-market | [ALTEN Spain](https://sumble.com/orgs/alten-spain) | 2 |
| Mid-market | [Fincons Group](https://sumble.com/orgs/fincons-group) | 2 |
| Enterprise | [Rohde & Schwarz](https://sumble.com/orgs/rohde-&-schwarz-gmbh-&-co-kg) | 5 |
| Enterprise | [Unisys](https://sumble.com/orgs/unisys-9) | 3 |
| Enterprise | [DoorDash](https://sumble.com/orgs/doordash) | 2 |
| Enterprise | [IDEMIA](https://sumble.com/orgs/idemia) | 1 |
| Enterprise | [Harris Computer](https://sumble.com/orgs/harris-computer) | 1 |

Companies that named Vert.x 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 Vert.x companies use?

The tool most tied to Vert.x is Micronaut. 13% of Vert.x companies use it, 61 times the usual rate for their size. Next is Dropwizard: 5.6% of these companies use it, against 0.1% of similar ones.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Micronaut | 47 | 13% | 0.21% | 61 times |
| Dropwizard | 20 | 5.6% | 0.1% | 58 times |
| Aerospike | 26 | 7.2% | 0.15% | 48 times |
| Quarkus | 99 | 28% | 0.67% | 41 times |
| Hazelcast | 25 | 6.9% | 0.2% | 35 times |
| ScyllaDB | 18 | 5% | 0.15% | 34 times |
| Couchbase | 44 | 12% | 0.47% | 26 times |
| Newman | 23 | 6.4% | 0.26% | 25 times |

Shares are out of the 360 companies whose job posts name Vert.x, not counting firms whose job posts name almost every technology.

## Which project themes come up in Vert.x job posts?

The most common project theme in Vert.x job posts is Microservices Migration, with 314 posts. Apart from broad digital transformation work, Data Infrastructure Migration comes next, with 77.

| Project theme | Job posts |
|---|---:|
| Microservices Migration | 314 |
| Digital Transformation | 263 |
| Data Infrastructure Migration | 77 |
| Cloud Migration | 34 |

## 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.