Jack & Jill tech stack
Jack & Jill builds mostly with JavaScript, Python, TypeScript. Its stack also includes PostgreSQL, FastAPI, Next.js. JavaScript is named in 1 of the 6 job postings Jack & Jill published in the last 12 months (17%). Counted by Alion from the job postings of Jack & Jill, updated Oct 23, 2026.
What programming languages does Jack & Jill use?
JavaScript is named in 17% of job postings at Jack & Jill, followed by Python (17%), TypeScript (17%).
What frameworks and libraries does Jack & Jill use?
FastAPI is named in 17% of job postings at Jack & Jill, followed by Next.js (17%), React.js (17%).
What databases does Jack & Jill use?
PostgreSQL is named in 17% of job postings at Jack & Jill.
PostgreSQL
1 17%
Which engineering practices does Jack & Jill ask for?
AI Agents is named in 100% of job postings at Jack & Jill, followed by A/B Testing (33%), Human-in-the-Loop (17%).
How does your stack fit Jack & Jill?
How is the Jack & Jill 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 Jack & Jill stack?
Jack & Jill scores 81 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 Jack & Jill stack in its industry?
Share of the 1,399 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Jack & Jill
Questions about the Jack & Jill tech stack
What programming languages does Jack & Jill use?
The languages named in Jack & Jill job postings are JavaScript (17%), Python (17%), TypeScript (17%), as a share of the 6 postings of the last 12 months.
Is the Jack & Jill tech stack changing?
Yes. A/B Testing first appeared in Jack & Jill job postings in the last six months.
How modern is the Jack & Jill tech stack?
Jack & Jill scores 81 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 Jack & Jill tech stack?
Alion reads every job posting Jack & Jill 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 23, 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, "Jack & Jill tech stack: 10 technologies from 6 job postings", as of Oct 23, 2026. https://alion.io/company/jackandjill/technologies