Top Series C Developer tools companies
IDEs, runtimes, frameworks, and platforms built primarily for engineers. Filtered to companies whose latest disclosed round is Series C.
Edit the query above, or pick a refinement. 500 free credits on sign-up, no card needed.
- StageSeries C
- IndustryDeveloper tools
- Matches971
Built from a search like: “Top Series C Developer tools companies”
Ranked by current headcount across Series C Developer tools companies. Refreshed monthly.
- 1Amazon Fulfillment Technologies & Robotics· North Reading, Massachusetts, United States
On the Fulfillment Technologies & Robotics Team, we build dynamic partnerships between people and intelligent machines. This intricate collaboration helps Amazon fulfill orders with unmatched accuracy. Since we began working with robotics, we've added over a million new jobs worldwide.Working in symphony with our robotic technology, employees have the opportunity to extend their technical capabilities by working alongside some of the industry’s most advanced technologies. This includes our fleet of autonomous mobile robots, sophisticated control software, and technologies like language perception, machine learning, object recognition, and semantic understanding of commands. These technologies help employees deliver an ever-improving customer and employee experience, as well as improve the safety of our facilities. Explore opportunities across the entire Fulfillment Technologies & Robotics team to find the right fit for you.
- Series C
- 18.1k employees
- Founded 2003
- 2Twitch· San Francisco, California, United States
Twitch is where thousands of communities come together for whatever, every day. Together for streamers. Together for games we love. Together for each other.
- Series C
- 14.5k employees
- Founded 2011
- 3Hotmart· Amsterdam, North Holland, Netherlands
Impactar desde o dia um. Foi com essa certeza que João Pedro Resende e Mateus Bicalho fundaram a Hotmart em 2011. Nascemos como uma startup mineira e nos tornamos uma empresa global de tecnologia com soluções inovadoras que transformam conteúdos em negócios digitais de sucesso. Somos pioneiros e líderes da Creator Economy (Economia dos Criadores de Conteúdo), possibilitando que milhões de pessoas vivam de suas paixões, transformando sua audiência em clientes, suas habilidades em produtos, e sua influência em negócios. Hoje somos +1.700 Troopers (é assim que chamamos nossos colaboradores e colaboradoras) espalhados pelo Brasil, Espanha, Colômbia, México, Estados Unidos, França e Países Baixos, onde fica localizada a nossa sede. Somos talentos diversos, movidos por encorajar as pessoas a compartilharem seus conhecimentos e ganharem o mundo. E fazemos isso com Liberdade, Autonomia e Love. Já são +200 mil criadores de conteúdo, com vendas registradas em +188 países. Impactar, pra nós, é permitir sonhar, mas também realizar. É ver milhões de vidas serem transformadas. É fazer parte de uma verdadeira revolução no mercado digital, que está só começando. Nós somos a Hotmart. Nosso trabalho impulsiona e fortalece negócios digitais, gerando empregos, disseminando conhecimento e impactando de verdade!
- Series C
- 12.6k employees
- Founded 2011
- Live search
This list is a starting point
I can run a natural-language search across LinkedIn, GitHub, and the open web. Fire one of these, or edit the box up top to match exactly who you're after.
500 free credits on sign-up, no card needed.
- 4Mercor· San Francisco, California, United States
We find the best experts in every professional domain and put their knowledge to work training frontier models. Through APEX, we measure whether those models can actually perform economically valuable work. We're also bringing that expertise to enterprises: deploying custom AI agents, staffing teams with vetted domain experts, and helping organizations encode their own knowledge into AI systems.
- Series C
- 11.1k employees
- Founded 2023
- 5Arista Networks· Santa Clara, California, United States
Arista Networks is an industry leader in data-driven, client to cloud networking for large data center/AI, campus and routing environments. Arista’s award-winning platforms deliver availability, agility, automation, analytics and security through an advanced network operating stack.visit https://www.arista.com.Additional information and resources can be found at: www.arista.comwww.twitter.com/aristanetworkswww.facebook.com/AristaNWwww.youtube.com/user/AristaNetworks
- Series C
- 5.8k employees
- Founded 2004
Find engineers and founders at Series C Developer tools companies
Series C Developer tools companies are some of the most active hirers in the market. The list above ranks the largest Developer tools companies whose latest disclosed round is Series C, by current headcount, drawn from public LinkedIn and Crunchbase records. Across 971 matching companies, you’ll find senior engineers, founding designers, and operators worth tracking.
Companies at this stage in Developer tools share a profile: a working product, fresh capital, and a hiring plan that wants senior people yesterday. Looking at headcount, last round, and HQ side by side gives you a quick read on where Developer tools talent is concentrating right now.
Refolk converts this list into a search. Ask for “Series C Developer tools founders hiring senior engineers” or “design leads at Series C Developer tools companies” and Refolk returns a fresh ranked shortlist with the sources behind each match.
How this list is built
Last refreshed: Tue, 15 Sep 2026 18:41:22 GMT
Need an even more specific search?
Refolk runs natural-language searches across LinkedIn, GitHub, and the open web. Try one of these:
- Series C Developer tools companies in San FranciscoRun
- Series C Developer tools companies hiringRun
- Founders of Series C Developer tools companiesRun
500 free credits on sign-up, no card needed.
Related lists
- Seed Developer tools
- Series A Developer tools
- Series B Developer tools
- Series C AI
- Series C SaaS
- Series C Fintech
- Series C Cybersecurity
- Series C Healthtech
See all company lists.
Or zoom out
Slice this list a different way
Common questions
How is this ranking built?
The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.
How fresh is the data?
The underlying index updates continuously and this ranking is rebuilt monthly. Last refreshed: Tue, 15 Sep 2026 18:41:22 GMT. For a list built against the index as it stands today, sign up and run the search live.
Can I get the full list of 971 companies?
Yes. This page shows the top of the ranking; sign up and I'll run the search live for the complete, current list. You start with 500 free credits, no card required.
Can I find the people inside these companies?
Yes. Ask in plain English - for example "engineering leaders at these companies who joined in the last year" - and I return the specific people, with context on each.
Try it on the search you came here for
Stop building boolean strings. Just describe the person.
Type one sentence. I plan the search, read GitHub, public LinkedIn and Crunchbase records, and the open web as it is right now, and hand back a ranked list with the reason next to every name.
01Describe them
One plain sentence. Role, city, stack, stage, whatever matters to you.
02I read the web live
GitHub, public LinkedIn and Crunchbase records, the open web. Not a database that went stale last quarter.
03You read the shortlist
Ranked, with the reasoning under every name. Open a profile, ask a follow-up, narrow it down.
- Staff backend engineers in NYC who shipped Rust in production
- Series A fintechs in SF under 50 people, growing headcount this year
- Maintainers of fast-growing Rust web frameworks on GitHub
- No boolean, no filters, no seat to buy. One box.
- Read at search time, so a profile updated yesterday counts today.
- Every step visible as it runs, every name with its reason.
500 free credits on sign-up. No card, no demo call. See real searches.