Joist tech stack
Joist builds mostly with SQL, TypeScript, JavaScript, Python. Its stack also includes AWS, PostgreSQL, React.js, Kubernetes. AWS is named in 8 of the 22 job postings Joist published in the last 12 months (36%). Counted by Alion from the job postings of Joist, updated Sep 26, 2026.
What programming languages does Joist use?
SQL is named in 32% of job postings at Joist, followed by TypeScript (32%), JavaScript (32%), Python (18%).
SQL
7 32%
TypeScript
7 32%
JavaScript
7 32%
Python
4 18%
Node JS
3 14%
PowerShell
2 9%
Bash
1 5%
Apex
1 5%
What frameworks and libraries does Joist use?
React.js is named in 18% of job postings at Joist, followed by React Native (9%), Angular (5%), Django (5%).
React.js
4 18%
React Native
2 9%
Angular
1 5%
Django
1 5%
Next.js
1 5%
OpenTelemetry
1 5%
Tailwind CSS
1 5%
What databases does Joist use?
PostgreSQL is named in 27% of job postings at Joist, followed by MS SQL (9%), MySQL (9%), Redis (9%).
PostgreSQL
6 27%
MS SQL
2 9%
MySQL
2 9%
Redis
2 9%
Azure SQL Database
1 5%
MariaDB
1 5%
Memcached
1 5%
MongoDB
1 5%
Show all (9)
What cloud and platforms does Joist use?
AWS is named in 36% of job postings at Joist, followed by Kubernetes (14%), AWS Bedrock (9%), GitHub (9%).
AWS
8 36%
Kubernetes
3 14%
AWS Bedrock
2 9%
GitHub
2 9%
Power BI
2 9%
Tableau
2 9%
Show all (30)
What developer tools does Joist use?
Rest API is named in 18% of job postings at Joist, followed by Docker (14%), Git (14%), Terraform (14%).
Rest API
4 18%
Docker
3 14%
Git
3 14%
Terraform
3 14%
Ansible
1 5%
Chef
1 5%
CloudFormation
1 5%
Show all (14)
What AI and ML technologies does Joist use?
LLM is named in 23% of job postings at Joist, followed by ChatGPT (5%), Claude (5%).
Which engineering practices does Joist ask for?
AI Agents is named in 27% of job postings at Joist, followed by CI/CD (27%), Agentic Workflows (9%), IAM (9%).
AI Agents
6 27%
CI/CD
6 27%
RAG
2 9%
Show all (20)
What does each Joist team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
8 postingsHow does your stack fit Joist?
How much does Joist pay by technology?
Median stated pay of the postings that name each technology, against the median of all Joist postings with stated pay: $132k across 20 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| AWS | 7 | $134k | +2% |
| JavaScript | 7 | $106k | −20% |
| TypeScript | 7 | $106k | −20% |
| PostgreSQL | 6 | $120k | −9% |
| SQL | 6 | $103k | −22% |
| LLM | 5 | $140k | +6% |
How is the Joist 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 Joist stack?
Joist scores 84 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 Joist stack in its industry?
Share of the 494 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Joist
Questions about the Joist tech stack
What programming languages does Joist use?
The languages named in Joist job postings are SQL (32%), TypeScript (32%), JavaScript (32%), Python (18%), Node JS (14%), as a share of the 22 postings of the last 12 months.
Does Joist use React.js?
Yes. React.js is named in 4 of 22 job postings (18%) and required in 2 of them.
What cloud and platforms does Joist use?
The cloud and platforms named in Joist job postings are AWS (8), Kubernetes (3), AWS Bedrock (2) (postings in brackets).
What skills do you need for a Backend job at Joist?
Backend postings at Joist most often require TypeScript (6), AWS (5), PostgreSQL (4), Git (3), out of 8 postings in the last 12 months.
Is the Joist tech stack changing?
Yes. Microsoft Excel, LLM, Braze, TypeScript first appeared in Joist job postings in the last six months.
How modern is the Joist tech stack?
Joist scores 84 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 Joist tech stack?
Alion reads every job posting Joist publishes and tags the technologies each one names. The figures on this page count the 22 postings of the last 12 months and were updated on Sep 26, 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, "Joist tech stack: 91 technologies from 22 job postings", as of Sep 26, 2026. https://alion.io/company/joist/technologies