Firsty tech stack
Firsty builds mostly with JavaScript, Node JS, Java, Go. Its stack also includes Firebase, GCP, Amazon Redshift, BigQuery. JavaScript is named in 9 of the 18 job postings Firsty published in the last 12 months (50%). Counted by Alion from the job postings of Firsty, updated Oct 13, 2026.
What programming languages does Firsty use?
JavaScript is named in 50% of job postings at Firsty, followed by Node JS (44%), Java (39%), Go (6%).
What frameworks and libraries does Firsty use?
React.js is named in 6% of job postings at Firsty.
React.js
1 6%
What databases does Firsty use?
Amazon Redshift is named in 6% of job postings at Firsty, followed by BigQuery (6%), Google BigQuery (6%), PostgreSQL (6%).
BigQuery 
What cloud and platforms does Firsty use?
Firebase is named in 33% of job postings at Firsty, followed by GCP (6%), AWS (6%), Azure (6%).
What developer tools does Firsty use?
Claude Code is named in 11% of job postings at Firsty.
Claude Code
2 11%
What AI and ML technologies does Firsty use?
Claude is named in 39% of job postings at Firsty.
Claude
7 39%
Which engineering practices does Firsty ask for?
CI/CD is named in 6% of job postings at Firsty.
CI/CD
1 6%
What does each Firsty team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
10 postingsHow does your stack fit Firsty?
How is the Firsty 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 Firsty stack?
Firsty scores 86 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: 1; legacy ones: 0.
How common is the Firsty stack in its industry?
Share of the 136 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Firsty apart
Companies with a stack like Firsty
Questions about the Firsty tech stack
What programming languages does Firsty use?
The languages named in Firsty job postings are JavaScript (50%), Node JS (44%), Java (39%), Go (6%), Python (6%), as a share of the 18 postings of the last 12 months.
Does Firsty use Firebase?
Yes. Firebase is named in 6 of 18 job postings (33%) and required in 6 of them.
What cloud and platforms does Firsty use?
The cloud and platforms named in Firsty job postings are Firebase (6), GCP (1), AWS (1) (postings in brackets).
What skills do you need for a Backend job at Firsty?
Backend postings at Firsty most often require Node JS (8), Java (7), Firebase (6), Claude Code (2), out of 10 postings in the last 12 months.
Is the Firsty tech stack changing?
Yes. Node JS, Java, Firebase, JavaScript first appeared in Firsty job postings in the last six months.
How modern is the Firsty tech stack?
Firsty scores 86 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: 1; legacy ones: 0.
How does Alion know the Firsty tech stack?
Alion reads every job posting Firsty publishes and tags the technologies each one names. The figures on this page count the 18 postings of the last 12 months and were updated on Oct 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, "Firsty tech stack: 22 technologies from 18 job postings", as of Oct 13, 2026. https://alion.io/company/firsty/technologies