Join tech stack
Join builds mostly with JavaScript, TypeScript, Java, Python. Its stack also includes Kubernetes, React.js, AWS, Redis. JavaScript is named in 6 of the 10 job postings Join published in the last 12 months (60%). Counted by Alion from the job postings of Join, updated Nov 13, 2026.
What programming languages does Join use?
JavaScript is named in 60% of job postings at Join, followed by TypeScript (50%), Java (40%), Python (40%).
What frameworks and libraries does Join use?
React.js is named in 40% of job postings at Join, followed by Angular (20%), Appium (10%), AutoGen (10%).
React.js
4 40%
Angular
2 20%
Appium
1 10%
AutoGen
1 10%
Bootstrap
1 10%
CrewAI
1 10%
Doctrine
1 10%
LangChain
1 10%
Show all (13)
What databases does Join use?
Redis is named in 20% of job postings at Join, followed by MariaDB (10%), PostgreSQL (10%).
What cloud and platforms does Join use?
Kubernetes is named in 50% of job postings at Join, followed by AWS (30%), Amazon S3 (20%), Azure (20%).
Kubernetes
5 50%
AWS
3 30%
Azure
2 20%
Azure DevOps
2 20%
GCP
2 20%
GitHub
2 20%
AWS Lambda
1 10%
Show all (18)
What developer tools does Join use?
Docker is named in 60% of job postings at Join, followed by Git (20%), Terraform (20%), Claude Code (10%).
Docker
6 60%
Git
2 20%
Terraform
2 20%
Claude Code
1 10%
Copilot
1 10%
GraphQL
1 10%
PHPStan
1 10%
PHPUnit
1 10%
Show all (12)
What AI and ML technologies does Join use?
Claude is named in 20% of job postings at Join, followed by LLM (10%).
Which engineering practices does Join ask for?
CI/CD is named in 60% of job postings at Join, followed by AI Agents (20%), IAM (20%), Function Calling (10%).
CI/CD
6 60%
AI Agents
2 20%
Function Calling
1 10%
Platform Engineering
1 10%
Prompt Engineering
1 10%
RAG
1 10%
What does each Join team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
6 postingsHow does your stack fit Join?
How is the Join 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 Join stack?
Join 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 Join stack in its industry?
Share of the 207 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Join
Questions about the Join tech stack
What programming languages does Join use?
The languages named in Join job postings are JavaScript (60%), TypeScript (50%), Java (40%), Python (40%), Node JS (20%), as a share of the 10 postings of the last 12 months.
Does Join use React.js?
Yes. React.js is named in 4 of 10 job postings (40%) and required in 4 of them.
What cloud and platforms does Join use?
The cloud and platforms named in Join job postings are Kubernetes (5), AWS (3), Amazon S3 (2) (postings in brackets).
What skills do you need for a Backend job at Join?
Backend postings at Join most often require JavaScript (4), TypeScript (4), AWS (3), Docker (3), out of 6 postings in the last 12 months.
Is the Join tech stack changing?
Yes. GitHub, IAM, Terraform first appeared in Join job postings in the last six months.
How modern is the Join tech stack?
Join 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 Join tech stack?
Alion reads every job posting Join publishes and tags the technologies each one names. The figures on this page count the 10 postings of the last 12 months and were updated on Nov 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, "Join tech stack: 62 technologies from 10 job postings", as of Nov 13, 2026. https://alion.io/company/join/technologies