We found 21,161 companies that use SPI. 12,837 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; 22,398 job posts named it from October 2025 to August 2026. Embedded Engineer is the role that names it most often.
The companies with the most job posts naming SPI are Apple (2,470), Amazon (963) and Anduril Industries (880). Of the five companies in the table, Qualcomm has the most employees who list it on their profiles: 631.
CompanyPostsPeopleRecent job post
AppleScientific and Technical Services · first seen Jul 20222,470280
"Understanding of communication protocols and interfaces common in embedded systems (I2C, SPI, UART, CAN, etc.) together with HW debugging tools (logic analyzer)"DevOps Engineer for Embedded Systems - Q, Nov 7, 2026
AmazonRetail Trade · first seen Jul 2022963130
"Implement and optimize peripheral drivers: SPI, I²C, UART, GPIO, ADC/DAC, PWM"Software Development Engineer II, Alexa Connectivity Devices, Nov 5, 2026
Anduril IndustriesManufacturing · first seen Sep 202288020
"Interfaces & Protocols: Familiarity with standard interfaces (CAN, I2C, SPI, Ethernet) and common MCU/CPU architectures."Senior Electrical Engineer (Power & Mixed-Signal), Nov 7, 2026
QualcommScientific and Technical Services · first seen Jul 2022778631
"Experience in Board and SOC bringup, Device drivers, peripheral buses (SPI, I2C, USB), Memory controllers for DDR"Staff Software Engineer, Nov 7, 2026
Analog DevicesScientific and Technical Services · first seen Jul 2022748127
"Broad understanding of digital communication interfaces such as I2C, SPI, and UART etc."Embedded Software Engineering Intern, Nov 3, 2026
SPI's share of job posts is about the same as three months earlier: 12 in every 10,000 job posts from June to August 2026, against 13 from March to May. From October to December 2025 it was 10.
Show the data
Month
Job posts naming SPI
All job posts
Per 10,000
Oct 2025
1,411
1,413,673
10.0
Nov 2025
1,953
1,822,119
11
Dec 2025
1,246
1,236,103
10
Jan 2026
1,982
1,828,002
11
Feb 2026
2,070
1,856,647
11
Mar 2026
2,161
1,850,711
12
Apr 2026
2,308
1,728,886
13
May 2026
2,366
1,821,509
13
Jun 2026
2,489
1,909,496
13
Jul 2026
2,200
1,815,180
12
Aug 2026
2,212
1,835,698
12
How many companies named SPI in a job post for the first time in recent months?
677 companies named SPI in a job post for the first time from June to August 2026, against 612 from March to May. That brings the companies naming it for the first time since October 2025 to 2,173, through August 2026.
March to May 2026612
June to August 2026677
October 2025 to August 20262,173
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 SPI?
For SPI, the evidence comes mostly from job posts. 12,837 companies name it in their own posts. 2,833 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name SPI
12,83761%
Employees' profiles list SPI
8,32439%
21,161 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use SPI?
Smaller companies stand out among SPI users: companies with fewer than 50 employees are 39% of them, against 22% on the typical tech page. 1,643 of its companies have more than 5,000 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
39%22%
50 to 999
42%38%
1,000 to 5,000
11%17%
Over 5,000
7.8%23%
Where are SPI companies based?
Beyond the United States (33%), SPI is unusually common in India, at 14% of its companies. Its companies are based in 122 countries and territories.
ShareTypical
United States
33%43%
India
14%6.9%
Germany
5.1%4.4%
United Kingdom
4.9%6.4%
France
4.6%4.6%
Canada
3.8%3.6%
Companies in 122 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
6,617
33%
43%
India
2,749
14%
6.9%
Germany
1,005
5.1%
4.4%
United Kingdom
982
4.9%
6.4%
France
904
4.6%
4.6%
Canada
748
3.8%
3.6%
Which teams work with SPI?
R&D teams are the most common home for SPI, at 436 companies, followed by engineering and hardware. Next are firmware and software teams, at 155 and 143 companies.
TeamCompanies
R&D
436
Engineering
381
Hardware
162
Firmware
155
Software
143
Product development
121
What else do SPI companies use?
SPI companies are 65 times as likely as similar companies to use UART: 70% of them, against 1.1%. Among the tools listed here, I2C is the most widely used, at 83% of SPI companies.
Share of the 10,584 SPI companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming SPI in job posts recently?
Between April and August 2026, SPI appeared for the first time in job posts at 416 companies: 317 commercial, 69 mid-market and 30 enterprise. Another 12 were AI-native companies, which we list separately.
Companies that named SPI 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 SPI most?
No single role dominates for SPI; Embedded Engineer leads with 18% of the job posts. Embedded Engineer posts naming it numbered 1,158 from March to May 2026 and 1,188 from June to August.
RoleSharePosts
Embedded Engineer
18%3,992
Firmware Engineer
16%3,503
Hardware Engineer
12%2,686
Software Engineer
9.5%2,127
Electrical Engineer
8.4%1,882
Software Development Engineer in Test
3.9%865
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Embedded Engineer
18%
3,992
1,158
1,188
Firmware Engineer
16%
3,503
1,022
963
Hardware Engineer
12%
2,686
781
832
Software Engineer
9.5%
2,127
620
598
Electrical Engineer
8.4%
1,882
581
637
Software Development Engineer in Test
3.9%
865
252
243
Which project themes come up in SPI job posts?
Setting aside broad digital transformation, Microservices Migration is the theme teams hiring for SPI mention most, in 31 job posts. Data Infrastructure Migration is next, in 17 job posts.
Project themeJob posts
Digital Transformation1,240
Microservices Migration31
Data Infrastructure Migration17
Generative AI8
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.
