Extend tech stack
Extend builds mostly with Kotlin, Java, JavaScript, Python. Its stack also includes AWS, PostgreSQL, React.js, Spring Boot. Kotlin is named in 2 of the 3 job postings Extend published in the last 12 months (67%). Counted by Alion from the job postings of Extend, updated Oct 3, 2026.
What programming languages does Extend use?
Kotlin is named in 67% of job postings at Extend, followed by Java (33%), JavaScript (33%), Python (33%).
What frameworks and libraries does Extend use?
React.js is named in 33% of job postings at Extend, followed by Spring Boot (33%).
React.js
1 33%
Spring Boot
1 33%
What databases does Extend use?
PostgreSQL is named in 33% of job postings at Extend.
PostgreSQL
1 33%
Which engineering practices does Extend ask for?
A/B Testing is named in 33% of job postings at Extend, followed by Clean Architecture (33%), SRE (33%).
How does your stack fit Extend?
How modern is the Extend stack?
Extend scores 80 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 Extend stack in its industry?
Share of the 586 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Extend
Questions about the Extend tech stack
What programming languages does Extend use?
The languages named in Extend job postings are Kotlin (67%), Java (33%), JavaScript (33%), Python (33%), SQL (33%), as a share of the 3 postings of the last 12 months.
What cloud and platforms does Extend use?
The cloud and platforms named in Extend job postings are AWS (1) (postings in brackets).
Is the Extend tech stack changing?
No new technology has appeared in Extend job postings in the last six months.
How modern is the Extend tech stack?
Extend scores 80 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 Extend tech stack?
Alion reads every job posting Extend publishes and tags the technologies each one names. The figures on this page count the 3 postings of the last 12 months and were updated on Oct 3, 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, "Extend tech stack: 12 technologies from 3 job postings", as of Oct 3, 2026. https://alion.io/company/extend-4/technologies