B4A tech stack
B4A builds mostly with Ruby, TypeScript, JavaScript. Its stack also includes Figma, GitHub, Amazon Aurora, PostgreSQL. Figma is named in 6 of the 6 job postings B4A published in the last 12 months (100%). Counted by Alion from the job postings of B4A, updated Oct 12, 2026.
What programming languages does B4A use?
Ruby is named in 83% of job postings at B4A, followed by TypeScript (83%), JavaScript (83%).
What frameworks and libraries does B4A use?
Jest is named in 83% of job postings at B4A, followed by Next.js (83%), RSpec (83%), React.js (83%).
What databases does B4A use?
Amazon Aurora is named in 83% of job postings at B4A, followed by PostgreSQL (83%).
Amazon Aurora
5 83%
PostgreSQL
5 83%
What cloud and platforms does B4A use?
Figma is named in 100% of job postings at B4A, followed by GitHub (100%), AWS (83%), AWS Fargate (83%).
What developer tools does B4A use?
GraphQL is named in 83% of job postings at B4A, followed by Terraform (83%), Copilot (33%).
Which engineering practices does B4A ask for?
SLI/SLO/SLA is named in 33% of job postings at B4A.
SLI/SLO/SLA
2 33%
How does your stack fit B4A?
How much does B4A pay by technology?
Median stated pay of the postings that name each technology, against the median of all B4A postings with stated pay: $834k across 6 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Figma | 6 | $834k | 0% |
| GitHub | 6 | $834k | 0% |
| AWS | 5 | $682k | −18% |
| AWS Fargate | 5 | $682k | −18% |
| Amazon Aurora | 5 | $682k | −18% |
| GitHub Actions | 5 | $682k | −18% |
| JavaScript | 5 | $682k | −18% |
| Jest | 5 | $682k | −18% |
| Next.js | 5 | $682k | −18% |
| PostgreSQL | 5 | $682k | −18% |
How is the B4A 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 B4A stack?
B4A scores 77 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: 0; legacy ones: 0.
How common is the B4A stack in its industry?
Share of the 243 companies in the same industries, whose stack Alion knows, that use each technology.
What sets B4A apart
Companies with a stack like B4A
Questions about the B4A tech stack
What programming languages does B4A use?
The languages named in B4A job postings are Ruby (83%), TypeScript (83%), JavaScript (83%), as a share of the 6 postings of the last 12 months.
Does B4A use Jest?
Yes. Jest is named in 5 of 6 job postings (83%) and required in 5 of them.
What cloud and platforms does B4A use?
The cloud and platforms named in B4A job postings are Figma (6), GitHub (6), AWS (5) (postings in brackets).
Is the B4A tech stack changing?
Yes. Copilot, SLI/SLO/SLA, Figma, GitHub first appeared in B4A job postings in the last six months.
How modern is the B4A tech stack?
B4A scores 77 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: 0; legacy ones: 0.
How does Alion know the B4A tech stack?
Alion reads every job posting B4A publishes and tags the technologies each one names. The figures on this page count the 6 postings of the last 12 months and were updated on Oct 12, 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, "B4A tech stack: 19 technologies from 6 job postings", as of Oct 12, 2026. https://alion.io/company/b4a/technologies