# Companies using UART

We found 13,266 companies that use UART. 9,806 of them name it in their own job posts, and the rest through employees' public profiles. Hiring for it is steady, with 14,974 job posts naming it from October 2025 to August 2026. R&D teams are its most common home.

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

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

The five companies with the most job posts naming UART are Apple, Amazon, Analog Devices, Altran and Qualcomm. Three of these five companies are in Scientific and Technical Services.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Apple](https://sumble.com/orgs/apple) | 1,619 | 125 | "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) |
| [Amazon](https://sumble.com/orgs/amazon) | 515 | 55 | "Implement and optimize peripheral drivers: SPI, I²C, UART, GPIO, ADC/DAC, PWM" (Software Development Engineer II, Alexa Connectivity Devices, Nov 5, 2026) |
| [Analog Devices](https://sumble.com/orgs/analog-devices) | 513 | 42 | "Broad understanding of digital communication interfaces such as I2C, SPI, and UART etc." (Embedded Software Engineering Intern, Nov 3, 2026) |
| [Altran](https://sumble.com/orgs/capgemini-engineering) | 467 | 67 | "Develop and debug low-level drivers and interfaces such as SPI, I2C, UART, ADC, PWM, DMA, Timers, and Interrupts." (Embedded C Firmware Developer, Nov 5, 2026) |
| [Qualcomm](https://sumble.com/orgs/qualcomm) | 438 | 288 | "Extensive experience with Device Driver development on embedded systems (e.g., I2C, SPI, UART, USB, PCIe)." (linux kernel engineer, Nov 7, 2026) |

## Is hiring for UART growing?

Demand for UART is steady: 8.5 in every 10,000 job posts from June to August 2026, close to the 8.4 of March to May. Its busiest month was April 2026, at 9.1.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 888 | 1,413,673 | 6.3 |
| Nov 2025 | 1,315 | 1,822,119 | 7.2 |
| Dec 2025 | 807 | 1,236,103 | 6.5 |
| Jan 2026 | 1,322 | 1,828,002 | 7.2 |
| Feb 2026 | 1,378 | 1,856,647 | 7.4 |
| Mar 2026 | 1,425 | 1,850,711 | 7.7 |
| Apr 2026 | 1,567 | 1,728,886 | 9.1 |
| May 2026 | 1,526 | 1,821,509 | 8.4 |
| Jun 2026 | 1,668 | 1,909,496 | 8.7 |
| Jul 2026 | 1,498 | 1,815,180 | 8.3 |
| Aug 2026 | 1,580 | 1,835,698 | 8.6 |

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

635 companies named UART in a job post for the first time from June to August 2026, against 583 from March to May. Of the 9,806 companies whose job posts name it, 6.5% first named it from June to August.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 583 |
| June to August 2026 | 635 |
| October 2025 to August 2026 | 2,019 |

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 UART?

9,806 of the 13,266 companies name UART in their own job posts. 1,500 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name UART | 9,806 | 74% |
| Employees' profiles list UART | 3,460 | 26% |

## What size are the companies that use UART?

UART skews toward smaller firms. 42% 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 41%.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 42% | 22% |
| 50 to 999 | 41% | 38% |
| 1,000 to 5,000 | 9.5% | 17% |
| Over 5,000 | 7.3% | 23% |

## Where are UART companies based?

India is 2.5 times as common among UART companies as on the typical tech page, at 17%. The United States leads overall with 34%. Its companies are based in 99 countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 4,179 | 34% | 43% |
| India | 2,116 | 17% | 6.9% |
| Germany | 612 | 4.9% | 4.4% |
| United Kingdom | 547 | 4.4% | 6.4% |
| France | 527 | 4.2% | 4.6% |
| Canada | 454 | 3.7% | 3.6% |

## Which teams work with UART?

R&D is the team named most often in UART job posts, at 321 companies.

| Team | Companies |
|---|---:|
| R&D | 321 |
| Engineering | 240 |
| Firmware | 115 |
| Hardware | 115 |
| Software | 96 |
| Product development | 88 |

## Which roles mention UART most?

Embedded Engineer is the most common role, in 22% of job posts naming UART. Embedded Engineer posts naming it numbered 897 from March to May 2026 and 994 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Embedded Engineer | 22% | 3,261 | 897 | 994 |
| Firmware Engineer | 18% | 2,676 | 765 | 769 |
| Hardware Engineer | 11% | 1,660 | 500 | 531 |
| Software Engineer | 9.4% | 1,405 | 412 | 413 |
| Electrical Engineer | 7.4% | 1,110 | 323 | 391 |
| Software Development Engineer in Test | 3.9% | 590 | 176 | 168 |

## Which companies started naming UART in job posts recently?

From April to August 2026, 420 companies with 50 or more employees posted their first job naming UART: 319 commercial, 74 mid-market and 27 enterprise. Another 15 were AI-native companies, which we list separately.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [Dexmate](https://sumble.com/orgs/dexmate) | 3 |
| AI native | [iLOF](https://sumble.com/orgs/ilof) | 3 |
| AI native | [FieldAI](https://sumble.com/orgs/fieldai) | 2 |
| AI native | [Scry AI](https://sumble.com/orgs/scry-analytics) | 2 |
| AI native | [Bespoke Labs](https://sumble.com/orgs/bespokelabsai) | 2 |
| Commercial | [Agile Robots SE](https://sumble.com/orgs/agile-robots) | 9 |
| Commercial | [Royce Geo](https://sumble.com/orgs/roycegeo) | 6 |
| Commercial | [Spectra Defense Technologies](https://sumble.com/orgs/spectra-aerospace-defense) | 6 |
| Commercial | [Nuvoton Technology Corporation](https://sumble.com/orgs/nuvoton-technology-singapore) | 5 |
| Commercial | [Tracsis](https://sumble.com/orgs/tracsis) | 5 |
| Mid-market | [Intellias](https://sumble.com/orgs/intellias) | 20 |
| Mid-market | [ACV Auctions](https://sumble.com/orgs/acv-auctions) | 9 |
| Mid-market | [Socomec Group](https://sumble.com/orgs/socomec) | 6 |
| Mid-market | [Entrust](https://sumble.com/orgs/entrust-corporation) | 4 |
| Mid-market | [TGW Logistics](https://sumble.com/orgs/tgw-group) | 4 |
| Enterprise | [AUMOVIO](https://sumble.com/orgs/aumovio) | 9 |
| Enterprise | [LG Electronics](https://sumble.com/orgs/lg-electronics) | 8 |
| Enterprise | [Sopra Steria](https://sumble.com/orgs/sopra-steria) | 4 |
| Enterprise | [Stripe](https://sumble.com/orgs/stripe) | 4 |
| Enterprise | [JPMorganChase](https://sumble.com/orgs/jpmorgan-chase) | 2 |

Companies that named UART 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 UART companies use?

86% of UART companies also use I2C, against 1.3% of similar companies. Next is SPI: 93% of these companies use it, against 1.4% of similar ones.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| I2C | 6,894 | 86% | 1.3% | 68 times |
| SPI | 7,419 | 93% | 1.4% | 65 times |
| ARM Cortex | 434 | 5.4% | 0.1% | 57 times |
| STM32 | 2,024 | 25% | 0.46% | 55 times |
| FreeRTOS | 1,984 | 25% | 0.46% | 53 times |
| MIPI | 490 | 6.1% | 0.12% | 52 times |
| LVDS | 457 | 5.7% | 0.12% | 49 times |
| ESP32 | 1,038 | 13% | 0.27% | 48 times |

Shares are out of the 8,010 companies whose job posts name UART, not counting firms whose job posts name almost every technology.

## 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.