Arena tech stack
Arena builds mostly with Python, TypeScript, JavaScript, Go. Its stack also includes PostgreSQL, Next.js, React.js, Spark. LLM is named in 14 of the 37 job postings Arena published in the last 12 months (38%). Counted by Alion from the job postings of Arena, updated Nov 11, 2026.
What programming languages does Arena use?
Python is named in 35% of job postings at Arena, followed by TypeScript (32%), JavaScript (24%), Go (19%).
Python
13 35%
TypeScript
12 32%
JavaScript
9 24%
Go
7 19%
SQL
7 19%
Node JS
2 5%
Rust
2 5%
Scala
2 5%
Show all (10)
What frameworks and libraries does Arena use?
Next.js is named in 19% of job postings at Arena, followed by React.js (19%), Radix UI (16%), Tailwind CSS (16%).
Next.js
7 19%
React.js
7 19%
Radix UI
6 16%
Tailwind CSS
6 16%
Vitest
6 16%
shadcn/ui
6 16%
PyTorch
5 14%
JAX
4 11%
Show all (24)
What databases does Arena use?
PostgreSQL is named in 27% of job postings at Arena, followed by Redis (11%), Snowflake (8%), Delta Lake (8%).
What cloud and platforms does Arena use?
Spark is named in 14% of job postings at Arena, followed by AWS (14%), GCP (14%), Supabase (14%).
Spark
5 14%
AWS
5 14%
GCP
5 14%
Supabase
5 14%
Vercel
5 14%
Databricks
4 11%
Show all (20)
What developer tools does Arena use?
Terraform is named in 11% of job postings at Arena, followed by Envoy (8%), Kong (8%), Claude Code (3%).
What AI and ML technologies does Arena use?
LLM is named in 38% of job postings at Arena.
LLM
14 38%
Which engineering practices does Arena ask for?
AI Agents is named in 100% of job postings at Arena, followed by Machine Learning (30%), RLHF (16%), Reinforcement Learning (16%).
AI Agents
37 100%
RLHF
6 16%
Reinforcement Learning
6 16%
Fine-tuning
5 14%
Contrastive Learning
4 11%
Diffusion Models
4 11%
Show all (26)
What does each Arena team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
13 postingsAI/ML
6 postingsData Science
3 postingsHow does your stack fit Arena?
How much does Arena pay by technology?
Median stated pay of the postings that name each technology, against the median of all Arena postings with stated pay: $300k across 11 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| LLM | 6 | $325k | +8% |
| TypeScript | 6 | $300k | 0% |
How is the Arena 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 Arena stack?
Arena scores 75 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: 1; legacy ones: 0.
How common is the Arena stack in its industry?
Share of the 65 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Arena apart
Companies with a stack like Arena
Questions about the Arena tech stack
What programming languages does Arena use?
The languages named in Arena job postings are Python (35%), TypeScript (32%), JavaScript (24%), Go (19%), SQL (19%), as a share of the 37 postings of the last 12 months.
Does Arena use Next.js?
Yes. Next.js is named in 7 of 37 job postings (19%) and required in 1 of them.
What cloud and platforms does Arena use?
The cloud and platforms named in Arena job postings are Spark (5), AWS (5), GCP (5) (postings in brackets).
What skills do you need for a Backend job at Arena?
Backend postings at Arena most often require Go (5), JavaScript (4), Python (4), SQL (4), out of 13 postings in the last 12 months.
Is the Arena tech stack changing?
Yes. Figma, Azure, World Models, Kubernetes first appeared in Arena job postings in the last six months.
How modern is the Arena tech stack?
Arena scores 75 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: 1; legacy ones: 0.
How does Alion know the Arena tech stack?
Alion reads every job posting Arena publishes and tags the technologies each one names. The figures on this page count the 37 postings of the last 12 months and were updated on Nov 11, 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, "Arena tech stack: 94 technologies from 37 job postings", as of Nov 11, 2026. https://alion.io/company/arena/technologies