Josys tech stack
Josys builds mostly with Node JS, JavaScript, Ruby, SQL. Its stack also includes AWS, Ruby on Rails, Figma, Sidekiq. Node JS is named in 4 of the 13 job postings Josys published in the last 12 months (31%). Counted by Alion from the job postings of Josys, updated Oct 19, 2026.
What programming languages does Josys use?
Node JS is named in 31% of job postings at Josys, followed by JavaScript (31%), Ruby (23%), SQL (15%).
Node JS
4 31%
JavaScript
4 31%
Ruby
3 23%
SQL
2 15%
TypeScript
2 15%
Python
2 15%
Go
1 8%
PowerShell
1 8%
What frameworks and libraries does Josys use?
Ruby on Rails is named in 23% of job postings at Josys, followed by Sidekiq (15%), Cypress (8%), Pact (8%).
Ruby on Rails
3 23%
Sidekiq
2 15%
Cypress
1 8%
Pact
1 8%
Playwright
1 8%
Pytest
1 8%
React.js
1 8%
What databases does Josys use?
BigQuery is named in 8% of job postings at Josys, followed by ElasticSearch (8%), Google BigQuery (8%), MySQL (8%).
BigQuery 
What cloud and platforms does Josys use?
AWS is named in 23% of job postings at Josys, followed by Figma (15%), Azure (8%), GitHub Actions (8%).
What developer tools does Josys use?
Rest API is named in 31% of job postings at Josys, followed by Cursor (23%), Jenkins (15%), Adobe Photoshop (8%).
Rest API
4 31%
Cursor
3 23%
Jenkins
2 15%
Adobe Photoshop
1 8%
Docker
1 8%
GraphQL
1 8%
Helm
1 8%
JMeter
1 8%
Show all (11)
What AI and ML technologies does Josys use?
ChatGPT is named in 8% of job postings at Josys, followed by LLM (8%).
Which engineering practices does Josys ask for?
AI Agents is named in 77% of job postings at Josys, followed by CI/CD (23%), NFT (8%), Platform Engineering (8%).
AI Agents
10 77%
CI/CD
3 23%
NFT
1 8%
Platform Engineering
1 8%
SLI/SLO/SLA
1 8%
Shift-Left
1 8%
Synthetic Data
1 8%
What does each Josys team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
3 postingsHow does your stack fit Josys?
How is the Josys 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 Josys stack?
Josys scores 83 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: 2; legacy ones: 0.
How common is the Josys stack in its industry?
Share of the 110 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Josys
Questions about the Josys tech stack
What programming languages does Josys use?
The languages named in Josys job postings are Node JS (31%), JavaScript (31%), Ruby (23%), SQL (15%), TypeScript (15%), as a share of the 13 postings of the last 12 months.
Does Josys use Ruby on Rails?
Yes. Ruby on Rails is named in 3 of 13 job postings (23%) and required in 3 of them.
What cloud and platforms does Josys use?
The cloud and platforms named in Josys job postings are AWS (3), Figma (2), Azure (1) (postings in brackets).
What skills do you need for a Backend job at Josys?
Backend postings at Josys most often require AWS (3), Node JS (3), Rest API (3), Ruby on Rails (3), out of 3 postings in the last 12 months.
Is the Josys tech stack changing?
Yes. Sidekiq, Cursor, SQL, TypeScript first appeared in Josys job postings in the last six months.
How modern is the Josys tech stack?
Josys scores 83 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: 2; legacy ones: 0.
How does Alion know the Josys tech stack?
Alion reads every job posting Josys publishes and tags the technologies each one names. The figures on this page count the 13 postings of the last 12 months and were updated on Oct 19, 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, "Josys tech stack: 48 technologies from 13 job postings", as of Oct 19, 2026. https://alion.io/company/josys/technologies