{"company":{"id":2345,"name":"Callstack","domain":"callstack.com","url":"https://alion.io/company/callstack"},"answer":"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 18, 2026.","window_days":365,"postings_analysed":6,"open_postings":1,"technologies_in_use":26,"modernity_score":85,"ai_adoption":true,"technologies":[{"name":"React Native","layer":"frameworks","postings":6,"share":1,"required":6,"open_postings":1,"first_seen":"2026-04-03","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"JavaScript","layer":"languages","postings":6,"share":1,"required":4,"open_postings":1,"first_seen":"2026-04-03","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"React.js","layer":"frameworks","postings":6,"share":1,"required":3,"open_postings":1,"first_seen":"2026-04-03","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"IAM","layer":"practices","postings":2,"share":0.3333,"required":2,"open_postings":0,"first_seen":"2026-08-17","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"Linux","layer":"cloud","postings":2,"share":0.3333,"required":2,"open_postings":0,"first_seen":"2026-08-17","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"VPN","layer":"practices","postings":2,"share":0.3333,"required":2,"open_postings":0,"first_seen":"2026-08-17","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"Wi-Fi","layer":"practices","postings":2,"share":0.3333,"required":2,"open_postings":0,"first_seen":"2026-08-17","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"Windows","layer":"cloud","postings":2,"share":0.3333,"required":2,"open_postings":0,"first_seen":"2026-08-17","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"Claude Code","layer":"tools","postings":2,"share":0.3333,"required":0,"open_postings":0,"first_seen":"2026-06-03","last_seen":"2026-07-17","median_stated_pay_usd":null},{"name":"Cursor","layer":"tools","postings":2,"share":0.3333,"required":0,"open_postings":0,"first_seen":"2026-06-03","last_seen":"2026-07-17","median_stated_pay_usd":null},{"name":"DNS","layer":"practices","postings":2,"share":0.3333,"required":0,"open_postings":0,"first_seen":"2026-08-17","last_seen":"2026-08-21","median_stated_pay_usd":null},{"name":"OpenAI Codex","layer":"tools","postings":2,"share":0.3333,"required":0,"open_postings":0,"first_seen":"2026-06-03","last_seen":"2026-07-17","median_stated_pay_usd":null},{"name":"AI Agents","layer":"practices","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"AWS","layer":"cloud","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"Cloudflare","layer":"cloud","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"Computer Vision","layer":"practices","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"Edge AI","layer":"practices","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"GCP","layer":"cloud","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"GitHub","layer":"cloud","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"LLM","layer":"ai","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"Multimodal AI","layer":"practices","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"NLP","layer":"practices","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"Python","layer":"languages","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"RAG","layer":"practices","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"TypeScript","layer":"languages","postings":1,"share":0.1667,"required":1,"open_postings":0,"first_seen":"2026-07-18","last_seen":"2026-07-18","median_stated_pay_usd":null},{"name":"Claude","layer":"ai","postings":1,"share":0.1667,"required":0,"open_postings":0,"first_seen":"2026-07-17","last_seen":"2026-07-17","median_stated_pay_usd":null}],"own_products":[],"changes":{"first_appeared":[{"name":"IAM","first_seen":"2026-08-17"},{"name":"Linux","first_seen":"2026-08-17"},{"name":"VPN","first_seen":"2026-08-17"},{"name":"Wi-Fi","first_seen":"2026-08-17"},{"name":"Windows","first_seen":"2026-08-17"},{"name":"DNS","first_seen":"2026-08-17"}],"rising":[],"falling":[],"not_seen_180d":[]},"similar_stacks":[{"name":"Wix","url":"https://alion.io/company/wix/technologies","shared_technologies":23},{"name":"Gong","url":"https://alion.io/company/gong/technologies","shared_technologies":22},{"name":"2070Health","url":"https://alion.io/company/2070health/technologies","shared_technologies":22},{"name":"Cohere","url":"https://alion.io/company/cohere/technologies","shared_technologies":24},{"name":"Commure","url":"https://alion.io/company/commure/technologies","shared_technologies":22},{"name":"Social Discovery Group","url":"https://alion.io/company/socialdiscoverygroup/technologies","shared_technologies":23},{"name":"10Pearls","url":"https://alion.io/company/10pearls/technologies","shared_technologies":23},{"name":"Pinterest","url":"https://alion.io/company/pinterest/technologies","shared_technologies":22}],"html_url":"https://alion.io/company/callstack/technologies","json_url":"https://alion.io/company/callstack/technologies.json","license":"CC BY-SA 4.0","meta":{"source":"Alion","built_at":"2026-10-18T00:04:22Z","generated_at":"2026-10-18T05:48:55Z"}}