Callstack tech stack
Callstack builds mostly with JavaScript, Python, TypeScript. Its stack also includes React Native, React.js, Linux, Windows. JavaScript is named in 6 of the 6 job postings Callstack published in the last 12 months (100%). Counted by Alion from the job postings of Callstack, updated Oct 17, 2026.
What programming languages does Callstack use?
JavaScript is named in 100% of job postings at Callstack, followed by Python (17%), TypeScript (17%).
What frameworks and libraries does Callstack use?
React Native is named in 100% of job postings at Callstack, followed by React.js (100%).
React Native
6 100%
React.js
6 100%
What cloud and platforms does Callstack use?
Linux is named in 33% of job postings at Callstack, followed by Windows (33%), AWS (17%), Cloudflare (17%).
What developer tools does Callstack use?
Claude Code is named in 33% of job postings at Callstack, followed by Cursor (33%), OpenAI Codex (33%).
What AI and ML technologies does Callstack use?
LLM is named in 17% of job postings at Callstack, followed by Claude (17%).
Which engineering practices does Callstack ask for?
IAM is named in 33% of job postings at Callstack, followed by VPN (33%), Wi-Fi (33%), DNS (33%).
AI Agents
1 17%
Computer Vision
1 17%
Multimodal AI
1 17%
Show all (10)
How does your stack fit Callstack?
How is the Callstack 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 Callstack stack?
Callstack scores 85 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: 2; legacy ones: 0.
How common is the Callstack stack in its industry?
Share of the 5,349 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Callstack
Questions about the Callstack tech stack
What programming languages does Callstack use?
The languages named in Callstack job postings are JavaScript (100%), Python (17%), TypeScript (17%), as a share of the 6 postings of the last 12 months.
Does Callstack use React Native?
Yes. React Native is named in 6 of 6 job postings (100%) and required in 6 of them.
What cloud and platforms does Callstack use?
The cloud and platforms named in Callstack job postings are Linux (2), Windows (2), AWS (1) (postings in brackets).
Is the Callstack tech stack changing?
Yes. IAM, Linux, VPN, Wi-Fi first appeared in Callstack job postings in the last six months.
How modern is the Callstack tech stack?
Callstack scores 85 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: 2; legacy ones: 0.
How does Alion know the Callstack tech stack?
Alion reads every job posting Callstack 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 17, 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, "Callstack tech stack: 26 technologies from 6 job postings", as of Oct 17, 2026. https://alion.io/company/callstack/technologies