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.
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.
CompanyPostsRecent job post
Peter ParkScientific and Technical Services · first seen Jul 202383
"…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.comfirst seen Apr 202455
"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
VEEDInformation · first seen Jan 202352
"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 BoticárioRetail Trade · first seen Oct 202349
"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
Solvevafirst seen Jun 202342
"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
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.
Show the data
Month
Job posts naming Fastify
All job posts
Per 10,000
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.
March to May 2026166
June to August 2026144
October 2025 to August 2026566
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 knowCompaniesShare
Job posts name Fastify
1,79533%
Employees' profiles list Fastify
3,64667%
5,441 companies. Each is counted once, under the strongest evidence we have for it.
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.
Share of its companies
Typical tech page
ShareTypical
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.
ShareTypical
United States
27%43%
Brazil
13%2.8%
India
9.8%6.9%
France
5.6%4.6%
United Kingdom
5%6.4%
Germany
3.9%4.4%
Companies in 114 countries and territories. Shares are of companies with a known headquarters country.
Show the data
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.
TeamCompanies
Engineering
29
Development
9
IT
9
Technology
8
R&D
7
Tech
7
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%.
Share of the 1,341 Fastify companies counted here whose job posts also name the tool
Typical for companies the same size
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.
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.
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.
RoleSharePosts
Software Engineer
69%1,107
Frontend Engineer
4%64
AI Engineer
3.4%54
Engineer
2.5%40
Software Architect
1.4%23
Solutions Architect
1%16
Show the data
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 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 themeJob posts
Digital Transformation333
Microservices Migration153
Generative AI115
Cloud Cost Optimization53
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.
