# Companies using Fastify

5,441 companies in our data use Fastify, and 1,795 of them name it in job posts they wrote. Its share of job posts held steady in the three months to August 2026; 1,604 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. Source: Sumble.

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

The companies with the most job posts naming Fastify are Peter Park (83), Greeka.com (55) and VEED (52). Greeka.com is the newest of the five companies in the table, with its first job post naming it in April 2024.

| Company | Job posts | Recent job post |
|---|---:|---|
| [Peter Park](https://sumble.com/orgs/peter-park-system) | 83 | "…or C++, and hands-on experience with the corresponding frameworks, such as NestJS, Fastify, FastAPI or Flask, or Vue.js on the frontend." (Lead Software Engineer (m/f/d), Nov 5, 2026) |
| [Greeka.com](https://sumble.com/orgs/atos-greece) | 55 | "Experience with Nest.js, Fastify or similar web frameworks" (Backend Dev Node..js NeestJS Experts (2 Year Experience Salary Range: 400USD – 600USD) - JobID: 25042026B, Apr 27, 2026) |
| [VEED](https://sumble.com/orgs/veed) | 52 | "We use Fastify, gRPC, and Prisma with TypeScript and Node.js for backend services that power rendering, asset management, and AI integrations." (Senior Full Stack Engineer - Editor, Apr 27, 2026) |
| [Grupo Boticário](https://sumble.com/orgs/grupo-boticario) | 49 | "Arquitetura Fullstack: Projetar, construir e manter ecossistemas completos integrando APIs robustas em Node.js (NestJS, Express, Fastify) com interfaces reativas e modernas em React.js e Next.js;" (Fullstack Node/React developer - Specialist I (position affirmative for people with disabilities), Sep 26, 2026) |
| [Solveva](https://sumble.com/orgs/solveva) | 42 | "We use a microservice architecture, with Java, Kotlin, Spring on the backend, and Angular, NodeJS, Express, Fastify on the frontend." (QA Automation Engineer, Sep 13, 2025) |

## Is hiring for Fastify growing?

Demand for Fastify is steady: 0.80 in every 10,000 job posts from June to August 2026, close to the 0.80 of March to May.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 131 | 1,413,673 | 0.93 |
| Nov 2025 | 167 | 1,822,119 | 0.92 |
| Dec 2025 | 97 | 1,236,103 | 0.78 |
| Jan 2026 | 170 | 1,828,002 | 0.93 |
| Feb 2026 | 161 | 1,856,647 | 0.87 |
| Mar 2026 | 148 | 1,850,711 | 0.80 |
| Apr 2026 | 136 | 1,728,886 | 0.79 |
| May 2026 | 149 | 1,821,509 | 0.82 |
| Jun 2026 | 141 | 1,909,496 | 0.74 |
| Jul 2026 | 167 | 1,815,180 | 0.92 |
| Aug 2026 | 137 | 1,835,698 | 0.75 |

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

In the three months to August 2026, 144 companies posted about Fastify for the first time. From March to May, 166 did. Over the 11 months from October 2025, 566 companies posted their first job naming it.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 166 |
| June to August 2026 | 144 |
| October 2025 to August 2026 | 566 |

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 Fastify?

Most of these companies come from employees' profiles: 67% have no job post naming Fastify. 1,795 name it in their own job posts.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name Fastify | 1,795 | 33% |
| Employees' profiles list Fastify | 3,646 | 67% |

## What size are the companies that use Fastify?

Smaller companies stand out among Fastify users: companies with fewer than 50 employees are 39% of them, against 22% on the typical tech page. 561 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 39% | 22% |
| 50 to 999 | 41% | 38% |
| 1,000 to 5,000 | 9.7% | 17% |
| Over 5,000 | 10% | 23% |

## Where are Fastify companies based?

Brazil is 4.7 times as common among Fastify companies as on the typical tech page, at 13%. The United States leads overall with 27%. Its companies are based in 114 countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 1,382 | 27% | 43% |
| Brazil | 678 | 13% | 2.8% |
| India | 504 | 9.8% | 6.9% |
| France | 290 | 5.6% | 4.6% |
| United Kingdom | 255 | 5% | 6.4% |
| Germany | 201 | 3.9% | 4.4% |

## Which teams work with Fastify?

Fastify sits mostly with engineering teams (29 companies). Development and IT teams come next, at 9 companies each.

| Team | Companies |
|---|---:|
| Engineering | 29 |
| Development | 9 |
| IT | 9 |
| Technology | 8 |
| R&D | 7 |
| Tech | 7 |

## Which roles mention Fastify most?

Software Engineer roles make up 69% of the job posts that name Fastify. The top four roles cover 79% of these job posts.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Software Engineer | 69% | 1,107 | 271 | 278 |
| Frontend Engineer | 4% | 64 | 13 | 12 |
| AI Engineer | 3.4% | 54 | 13 | 24 |
| Engineer | 2.5% | 40 | 13 | 10 |
| Software Architect | 1.4% | 23 | 6 | 7 |
| Solutions Architect | 1% | 16 | 3 | 8 |

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

146 companies with 50 or more employees picked up Fastify in their job posts from April to August 2026. Among the new commercial companies, Newpage Solutions posted the most jobs naming it: 19.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Newpage Solutions](https://sumble.com/orgs/newpage-digital-healthcare-solutions) | 19 |
| Commercial | [ClickHouse](https://sumble.com/orgs/clickhouse) | 9 |
| Commercial | [XpertGroup](https://sumble.com/orgs/xpertgroupsas) | 7 |
| Commercial | [Dhiva.ai](https://sumble.com/orgs/dhiva) | 6 |
| Commercial | [OBSS](https://sumble.com/orgs/obss) | 5 |
| Mid-market | [Nortal](https://sumble.com/orgs/nortal) | 5 |
| Mid-market | [BRQ Digital Solutions](https://sumble.com/orgs/brq) | 4 |
| Mid-market | [Orion Innovation](https://sumble.com/orgs/orion-innovation) | 3 |
| Mid-market | [HCLSoftware](https://sumble.com/orgs/hclsoftware) | 3 |
| Mid-market | [Vuori](https://sumble.com/orgs/vuori) | 2 |
| Enterprise | [Amadeus](https://sumble.com/orgs/amadeus-038955bc) | 4 |
| Enterprise | [Amazon Web Services (AWS)](https://sumble.com/orgs/amazon-web-services) | 3 |
| Enterprise | [Verizon](https://sumble.com/orgs/verizon) | 3 |
| Enterprise | [Rakuten](https://sumble.com/orgs/global-rakuten-corporate) | 3 |
| Enterprise | [John Deere](https://sumble.com/orgs/john-deere) | 2 |

Companies that named Fastify 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 Fastify companies use?

Koa and Socket.io are the tools most closely tied to Fastify. NestJS comes third, 31 times as common as usual, at 48%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Koa | 98 | 7.3% | 0.11% | 65 times |
| Socket.io | 81 | 6% | 0.17% | 36 times |
| NestJS | 641 | 48% | 1.5% | 31 times |
| Zustand | 196 | 15% | 0.55% | 26 times |
| Express.js | 898 | 67% | 2.7% | 25 times |
| Context API | 177 | 13% | 0.59% | 22 times |
| GCP FireStore | 100 | 7.5% | 0.35% | 21 times |
| Styled Components | 130 | 9.7% | 0.48% | 20 times |

Shares are out of the 1,341 companies whose job posts name Fastify, not counting firms whose job posts name almost every technology.

## Which project themes come up in Fastify job posts?

Apart from broad digital transformation work, Microservices Migration comes up most in job posts naming Fastify, in 153 of them. Generative AI is next, in 115 job posts.

| Project theme | Job posts |
|---|---:|
| Digital Transformation | 333 |
| Microservices Migration | 153 |
| Generative AI | 115 |
| Cloud Cost Optimization | 53 |

## 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.