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.
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.
CompanyPostsPeopleRecent job post
American ExpressFinance and Insurance · first seen Jul 2022566303
"…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
CitiFinance and Insurance · first seen Sep 202317512
"Multiple years of experience with frameworks like Spring Boot, Quarkus, Micronaut, or Vert.x"senior java developer vp, Nov 7, 2026
WebnetProfessional Services · first seen Jul 20231700
", Quarkus, Struts, Kotlin ou encore Vert.x"java developer m/f, Nov 1, 2026
IntuitScientific and Technical Services · first seen Feb 202416333
"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. DiscoveryInformation · first seen Oct 202210013
"Hands-on experience with frameworks such as Spring WebFlux, Vert.x, Node.js."Senior Software Engineer, Oct 7, 2026
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.
Show the data
Month
Job posts naming Vert.x
All job posts
Per 10,000
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.
March to May 202620
June to August 202616
October 2025 to August 202687
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 knowCompaniesShare
Job posts name Vert.x
64718%
Employees' profiles list Vert.x
2,89882%
3,545 companies. Each is counted once, under the strongest evidence we have for it.
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.
Share of its companies
Typical tech page
ShareTypical
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%.
ShareTypical
United States
34%43%
India
6.7%6.9%
Germany
6.6%4.4%
United Kingdom
5.5%6.4%
Brazil
4.7%2.8%
France
4.7%4.6%
Companies in 104 countries and territories. Shares are of companies with a known headquarters country.
Show the data
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.
TeamCompanies
Engineering
12
Technology
6
R&D
4
Technology organization
4
Development
3
DevOps
3
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.
Share of the 360 Vert.x companies counted here whose job posts also name the tool
Typical for companies the same size
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.
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.
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.
RoleSharePosts
Software Engineer
69%490
Athletic Director
2.3%16
Consultant
2.3%16
Data Engineer
2.3%16
Software Architect
1.4%10
Operations
1.3%9
Show the data
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 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 themeJob posts
Microservices Migration314
Digital Transformation263
Data Infrastructure Migration77
Cloud Migration34
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.
