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Companies using RS232

We found 10,026 companies that use RS232. 4,484 of them name it in their own job posts, and the rest through employees' public profiles. Its share of job posts held steady in the three months to August 2026; 3,766 job posts named it from October 2025 to August 2026. It comes up most in Software Engineer job posts.

Data as of November 9, 2026 · Markdown version

Which companies name RS232 in the most job posts?

Anduril Industries, L3Harris Technologies and Honeywell Technologies are among the companies with the most job posts naming RS232. Of the five companies in the table, Honeywell Technologies has the most employees who list it on their profiles: 54.
Company Posts People Recent job post
Anduril Industries Manufacturing · first seen Sep 2022 289 18 "Experience with computer hardware communication protocols: USB, Ethernet, RS232, RS485, PCIe, HDMI, CAN, etc."Production Test Engineering Manager, EW, Nov 7, 2026
L3Harris Technologies Manufacturing · first seen Jul 2022 280 11 "Working with various serial communication protocols such as RS-232, RS-422, SPI, I2C, etc."Sr. Specialist, Electrical Engineering (FOS), Oct 24, 2026
Honeywell Technologies Manufacturing · first seen Sep 2022 243 54 "Establish Modbus communication (TCP/IP, RS232, RS485) for integration with terminal servers, PLCs, SCADA and DCS."systems engr ii, Nov 7, 2026
Northrop Grumman Manufacturing · first seen Jul 2022 201 38 "Familiarity with common industry standards related to communications systems, such as MIL-STD-1553, RS-422, RS-232, IPv4/IPv6"Staff Electronics Integration Engineer, Nov 2, 2026
Altran Professional Services · first seen Sep 2022 175 28 "Experience with communication protocols including TCP/IP, UDP, CAN, SPI, and RS232."Embedded Software Engineer, Sep 1, 2026
Showing 1 to 5 of 4,484 companies with job posts Sign up to see all companies using RS232 ›

What else do we know about RS232?

Is hiring for RS232 growing?

RS232 holds a steady place in hiring. 2.0 in every 10,000 job posts named it from June to August 2026, against 2.1 from March to May. From October to December 2025 it was 1.8.
Share of job posts naming RS232 by month, October 2025 to August 2026, in job posts in every 10,000 Moves from 1.7 in October 2025 to 2.2 in August 2026, in job posts in every 10,000. 2.5 1.9 1.3 0.63 0 2.2 Oct '25 Nov Dec Jan '26 Feb Mar Apr May Jun Jul Aug
Show the data
MonthJob posts naming RS232All job postsPer 10,000
Oct 20252461,413,6731.7
Nov 20253491,822,1191.9
Dec 20252131,236,1031.7
Jan 20263061,828,0021.7
Feb 20263661,856,6472.0
Mar 20263851,850,7112.1
Apr 20263651,728,8862.1
May 20264011,821,5092.2
Jun 20263861,909,4962.0
Jul 20263491,815,1801.9
Aug 20264001,835,6982.2

How many companies named RS232 in a job post for the first time in recent months?

Job posts named RS232 for the first time at 168 companies from June to August 2026, against 147 from March to May. The 168 from June to August are 3.7% of all 4,484 companies whose job posts name it.
March to May 2026 147
June to August 2026 168
October 2025 to August 2026 513

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 RS232?

The evidence for RS232 is close to even: 45% of these companies name it in job posts, and 55% come from employees' profiles. 868 show up in both job posts and employees' profiles.
How we know Companies Share
Job posts name RS232
4,484 45%
Employees' profiles list RS232
5,542 55%

10,026 companies. Each is counted once, under the strongest evidence we have for it.

What size are the companies that use RS232?

Companies with fewer than 50 employees are 1.4 times as common among RS232 users as on the typical tech page. 1,165 of its companies have more than 5,000 employees.

Share of its companies Typical tech page

ShareTypical
Under 50 employees
30% 22%
50 to 999
44% 38%
1,000 to 5,000
14% 17%
Over 5,000
12% 23%

Where are RS232 companies based?

Beyond the United States (37%), RS232 is unusually common in India, at 12% of its companies. Its companies are based in 103 countries and territories.
ShareTypical
United States
37% 43%
India
12% 6.9%
United Kingdom
5.7% 6.4%
France
4.7% 4.6%
Germany
4.4% 4.4%
Canada
4.2% 3.6%

Companies in 103 countries and territories. Shares are of companies with a known headquarters country.

Show the data
CountryCompaniesShareTypical tech page
United States3,54637%43%
India1,13912%6.9%
United Kingdom5375.7%6.4%
France4464.7%4.6%
Germany4144.4%4.4%
Canada3984.2%3.6%

Which teams work with RS232?

Job posts most often place RS232 with engineering, R&D and product development teams. Electrical engineering teams come fourth, at 28 companies.
Team Companies
Engineering
115
R&D
84
Product development
34
Electrical engineering
28
Software
27
Software engineering
26

What else do RS232 companies use?

Compared with companies of the same size, RS232 companies stand out for using RS422 and RS485. Among the tools listed here, SPI is the most widely used, at 54% of RS232 companies.

Share of the 3,374 RS232 companies counted here whose job posts also name the tool Typical for companies the same size

Tool Also name it Typical Times as common
RS422 450 companies
13% 0.16% 85x
RS485 1,780 companies
53% 0.7% 75x
LVDS 178 companies
5.3% 0.15% 35x
I2C 1,777 companies
53% 1.6% 34x
Tool Also name it Typical Times as common
SPI 1,834 companies
54% 1.8% 31x
VxWorks 211 companies
6.3% 0.21% 30x
PSpice 337 companies
10% 0.35% 29x
OrCAD 566 companies
17% 0.6% 28x

Which companies started naming RS232 in job posts recently?

145 companies with 50 or more employees picked up RS232 in their job posts from April to August 2026. National University of Singapore leads the new enterprise companies, with 12 job posts from April to August.
AI native any size · 3 new
Company Posts
Lila Sciences 3
Aureka Biotechnologies, Inc. 1
Prepaire Labs 1
Commercial 50 to 999 employees · 90 new
Company Posts
MWI Animal Health 7
SimoTech 4
LabLogic Systems 4
Voyager Technologies 3
Precise Systems, Inc. 3
Mid-market 1,000 to 5,000 employees · 35 new
Company Posts
WNC Corporation 5
Oesia 3
Teltonika 3
Dorman Products 3
Ring 3
Enterprise over 5,000 employees · 20 new
Company Posts
National University of Singapore 12
Exelon 3
Hitachi Rail 2
Senai São Paulo 2
Queensland Government 1

Companies that named RS232 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 RS232 most?

Software Engineer and Electrical Engineer roles account for 21% of the job posts that name RS232. Software Engineer posts naming it numbered 137 from March to May 2026 and 116 from June to August.
Role Share Posts
Software Engineer
12% 441
Electrical Engineer
8.8% 332
Embedded Engineer
8.4% 315
Firmware Engineer
7.6% 287
Hardware Engineer
7.5% 284
Software Development Engineer in Test
6.3% 238
Show the data
RoleShareOct 2025 to Aug 2026Mar to May 2026Jun to Aug 2026
Software Engineer12%441137116
Electrical Engineer8.8%33298105
Embedded Engineer8.4%3159581
Firmware Engineer7.6%2878882
Hardware Engineer7.5%2849975
Software Development Engineer in Test6.3%2385772

Which project themes come up in RS232 job posts?

Apart from broad digital transformation work, Microservices Migration comes up most in job posts naming RS232, in 17 of them. Broad digital transformation work shows up in 383 of its job posts.
Project theme Job posts
Digital Transformation 383
Microservices Migration 17
Data Infrastructure Migration 7
Security Infrastructure Modernization 3
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.