Shelf tech stack
Shelf builds mostly with Python, TypeScript, Node JS, JavaScript. Its stack also includes Snowflake, AWS, Azure, React.js. Python is named in 9 of the 11 job postings Shelf published in the last 12 months (82%). Counted by Alion from the job postings of Shelf, updated Sep 29, 2026.
What programming languages does Shelf use?
Python is named in 82% of job postings at Shelf, followed by TypeScript (55%), Node JS (36%), JavaScript (36%).
What frameworks and libraries does Shelf use?
React.js is named in 36% of job postings at Shelf, followed by Highcharts (18%), Next.js (18%).
What cloud and platforms does Shelf use?
AWS is named in 36% of job postings at Shelf, followed by Azure (36%), GCP (36%), OpenAI (36%).
What developer tools does Shelf use?
Claude Code is named in 100% of job postings at Shelf, followed by OpenAI Codex (82%), Copilot (27%), Cursor (18%).
What AI and ML technologies does Shelf use?
Claude is named in 64% of job postings at Shelf, followed by LLM (36%), ChatGPT (27%).
Which engineering practices does Shelf ask for?
AI Agents is named in 82% of job postings at Shelf, followed by Knowledge Graph (36%), RAG (36%), Hallucination (27%).
AI Agents
9 82%
RAG
4 36%
Hallucination
3 27%
Semantic Search
2 18%
How does your stack fit Shelf?
How is the Shelf 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 Shelf stack?
Shelf scores 89 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 Shelf stack in its industry?
Share of the 2,891 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Shelf
Questions about the Shelf tech stack
What programming languages does Shelf use?
The languages named in Shelf job postings are Python (82%), TypeScript (55%), Node JS (36%), JavaScript (36%), SQL (27%), as a share of the 11 postings of the last 12 months.
Does Shelf use React.js?
Yes. React.js is named in 4 of 11 job postings (36%) and required in 4 of them.
What cloud and platforms does Shelf use?
The cloud and platforms named in Shelf job postings are AWS (4), Azure (4), GCP (4) (postings in brackets).
Is the Shelf tech stack changing?
Yes. Cursor, ETL/ELT, ChatGPT, SQL first appeared in Shelf job postings in the last six months.
How modern is the Shelf tech stack?
Shelf scores 89 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 Shelf tech stack?
Alion reads every job posting Shelf publishes and tags the technologies each one names. The figures on this page count the 11 postings of the last 12 months and were updated on Sep 29, 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, "Shelf tech stack: 33 technologies from 11 job postings", as of Sep 29, 2026. https://alion.io/company/shelf-2/technologies