First.cx tech stack
First.cx builds mostly with Go, Python, JavaScript, Node JS. Its stack also includes Anthropic, OpenAI, ElasticSearch, PostgreSQL. Go is named in 8 of the 9 job postings First.cx published in the last 12 months (89%). Counted by Alion from the job postings of First.cx, updated Oct 13, 2026.
What programming languages does First.cx use?
Go is named in 89% of job postings at First.cx, followed by Python (67%), JavaScript (11%), Node JS (11%).
What databases does First.cx use?
ElasticSearch is named in 11% of job postings at First.cx, followed by PostgreSQL (11%), Redis (11%).
What cloud and platforms does First.cx use?
Anthropic is named in 22% of job postings at First.cx, followed by OpenAI (22%), AWS (11%), Amazon S3 (11%).
What developer tools does First.cx use?
Cursor is named in 56% of job postings at First.cx, followed by Claude Code (33%), Model Context Protocol (22%), Windsurf (22%).
Cursor
5 56%
Claude Code
3 33%
Model Context Protocol
2 22%
Windsurf
2 22%
Docker
1 11%
Rest API
1 11%
gRPC
1 11%
What AI and ML technologies does First.cx use?
LLM is named in 67% of job postings at First.cx, followed by Claude (22%), Gemini (22%).
Which engineering practices does First.cx ask for?
Knowledge Graph is named in 56% of job postings at First.cx, followed by Explainable AI (22%), Time Series Forecasting (11%).
What does each First.cx team work with?
The technologies each team's postings require most often, with the number of postings that require them.
AI/ML
3 postingsHow does your stack fit First.cx?
How much does First.cx pay by technology?
Median stated pay of the postings that name each technology, against the median of all First.cx postings with stated pay: $212k across 9 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Go | 8 | $212k | 0% |
| LLM | 6 | $231k | +9% |
| Python | 6 | $208k | −2% |
How is the First.cx stack changing?
Read from the dates of the postings themselves: a technology is new when the first posting that names it appeared in the last six months, rising or falling when its share of postings moved between the last two quarters.
How modern is the First.cx stack?
First.cx scores 93 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 3; legacy ones: 0.
How common is the First.cx stack in its industry?
Share of the 1,229 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like First.cx
Questions about the First.cx tech stack
What programming languages does First.cx use?
The languages named in First.cx job postings are Go (89%), Python (67%), JavaScript (11%), Node JS (11%), TypeScript (11%), as a share of the 9 postings of the last 12 months.
Does First.cx use Anthropic?
Yes. Anthropic is named in 2 of 9 job postings (22%) and required in 2 of them.
What cloud and platforms does First.cx use?
The cloud and platforms named in First.cx job postings are Anthropic (2), OpenAI (2), AWS (1) (postings in brackets).
What skills do you need for a AI/ML job at First.cx?
AI/ML postings at First.cx most often require Python (3), Anthropic (2), Claude Code (2), Cursor (2), out of 3 postings in the last 12 months.
Is the First.cx tech stack changing?
Yes. Claude, Explainable AI, Model Context Protocol, Windsurf first appeared in First.cx job postings in the last six months.
How modern is the First.cx tech stack?
First.cx scores 93 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 3; legacy ones: 0.
How does Alion know the First.cx tech stack?
Alion reads every job posting First.cx publishes and tags the technologies each one names. The figures on this page count the 9 postings of the last 12 months and were updated on Oct 13, 2026.
Method and citation
Alion reads every job posting the company publishes and tags the technologies each one names. Shares count the postings of the last 12 months, open and closed; the company's own products are counted apart. How we count
Alion, "First.cx tech stack: 27 technologies from 9 job postings", as of Oct 13, 2026. https://alion.io/company/first-9/technologies