{"company":{"id":41417,"name":"Zhihu","domain":"zhihu.com","url":"https://alion.io/company/zhihu"},"answer":"Zhihu builds mostly with Python, C++, Java, SQL. Its stack also includes PyTorch, TensorFlow, Spark, Dify. Python is named in 11 of the 15 job postings Zhihu published in the last 12 months (73%). Counted by Alion from the job postings of Zhihu, updated Oct 20, 2026.","window_days":365,"postings_analysed":15,"open_postings":15,"technologies_in_use":54,"modernity_score":89,"ai_adoption":true,"technologies":[{"name":"Python","layer":"languages","postings":11,"share":0.7333,"required":11,"open_postings":11,"first_seen":"2026-03-02","last_seen":"2026-10-14","median_stated_pay_usd":null},{"name":"LLM","layer":"ai","postings":9,"share":0.6,"required":9,"open_postings":9,"first_seen":"2025-10-29","last_seen":"2026-10-14","median_stated_pay_usd":null},{"name":"C++","layer":"languages","postings":6,"share":0.4,"required":6,"open_postings":6,"first_seen":"2026-03-16","last_seen":"2026-09-24","median_stated_pay_usd":null},{"name":"RLHF","layer":"practices","postings":6,"share":0.4,"required":6,"open_postings":6,"first_seen":"2025-12-05","last_seen":"2026-10-14","median_stated_pay_usd":null},{"name":"SFT","layer":"practices","postings":6,"share":0.4,"required":6,"open_postings":6,"first_seen":"2025-12-05","last_seen":"2026-10-14","median_stated_pay_usd":null},{"name":"Java","layer":"languages","postings":4,"share":0.2667,"required":4,"open_postings":4,"first_seen":"2026-03-16","last_seen":"2026-09-10","median_stated_pay_usd":null},{"name":"PyTorch","layer":"frameworks","postings":4,"share":0.2667,"required":4,"open_postings":4,"first_seen":"2026-03-02","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"SQL","layer":"languages","postings":4,"share":0.2667,"required":4,"open_postings":4,"first_seen":"2026-05-28","last_seen":"2026-10-13","median_stated_pay_usd":null},{"name":"TensorFlow","layer":"frameworks","postings":4,"share":0.2667,"required":4,"open_postings":4,"first_seen":"2026-03-02","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"LangChain","layer":"frameworks","postings":3,"share":0.2,"required":3,"open_postings":3,"first_seen":"2026-07-10","last_seen":"2026-10-13","median_stated_pay_usd":null},{"name":"LangGraph","layer":"frameworks","postings":3,"share":0.2,"required":3,"open_postings":3,"first_seen":"2026-07-10","last_seen":"2026-10-13","median_stated_pay_usd":null},{"name":"PyTorch C++","layer":"frameworks","postings":3,"share":0.2,"required":3,"open_postings":3,"first_seen":"2026-03-16","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"Spark","layer":"cloud","postings":3,"share":0.2,"required":3,"open_postings":3,"first_seen":"2026-03-02","last_seen":"2026-06-11","median_stated_pay_usd":null},{"name":"TensorFlow C++","layer":"frameworks","postings":3,"share":0.2,"required":3,"open_postings":3,"first_seen":"2026-03-16","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"VLM","layer":"ai","postings":3,"share":0.2,"required":3,"open_postings":3,"first_seen":"2025-12-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"AI Agents","layer":"practices","postings":2,"share":0.1333,"required":2,"open_postings":2,"first_seen":"2026-07-10","last_seen":"2026-10-10","median_stated_pay_usd":null},{"name":"Cursor","layer":"tools","postings":2,"share":0.1333,"required":2,"open_postings":2,"first_seen":"2026-07-10","last_seen":"2026-10-10","median_stated_pay_usd":null},{"name":"Function Calling","layer":"practices","postings":2,"share":0.1333,"required":2,"open_postings":2,"first_seen":"2026-07-10","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"Model Context Protocol","layer":"tools","postings":2,"share":0.1333,"required":2,"open_postings":2,"first_seen":"2026-07-10","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"OpenAI Codex","layer":"tools","postings":2,"share":0.1333,"required":2,"open_postings":2,"first_seen":"2026-07-10","last_seen":"2026-10-10","median_stated_pay_usd":null},{"name":"Prompt Engineering","layer":"practices","postings":2,"share":0.1333,"required":2,"open_postings":2,"first_seen":"2026-10-13","last_seen":"2026-10-14","median_stated_pay_usd":null},{"name":"Transformers","layer":"frameworks","postings":2,"share":0.1333,"required":2,"open_postings":2,"first_seen":"2026-06-11","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"A/B Testing","layer":"practices","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-16","last_seen":"2026-03-16","median_stated_pay_usd":null},{"name":"ChatGPT","layer":"ai","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-07-10","last_seen":"2026-07-10","median_stated_pay_usd":null},{"name":"Claude","layer":"ai","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-07-10","last_seen":"2026-07-10","median_stated_pay_usd":null},{"name":"Claude Code","layer":"tools","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-10-10","last_seen":"2026-10-10","median_stated_pay_usd":null},{"name":"CrewAI","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"DPO","layer":"practices","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"DeepSpeed","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"Dify","layer":"cloud","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-10-13","last_seen":"2026-10-13","median_stated_pay_usd":null},{"name":"FSDP","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"Flink","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-16","last_seen":"2026-03-16","median_stated_pay_usd":null},{"name":"Git","layer":"tools","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-10-10","last_seen":"2026-10-10","median_stated_pay_usd":null},{"name":"Hadoop","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"LLaVA","layer":"ai","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"Linux","layer":"cloud","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"LoRA","layer":"ai","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"Megatron-LM","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"Multimodal AI","layer":"practices","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-09-04","last_seen":"2026-09-04","median_stated_pay_usd":null},{"name":"MySQL","layer":"data","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-07-10","last_seen":"2026-07-10","median_stated_pay_usd":null},{"name":"NLP","layer":"practices","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2025-06-26","last_seen":"2026-06-11","median_stated_pay_usd":null},{"name":"ONNX","layer":"tools","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"Pandas","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-10-13","last_seen":"2026-10-13","median_stated_pay_usd":null},{"name":"QLoRA","layer":"ai","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"RAG","layer":"practices","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"RLAIF","layer":"practices","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"Redis","layer":"data","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-07-10","last_seen":"2026-07-10","median_stated_pay_usd":null},{"name":"Rust","layer":"languages","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null},{"name":"TensorRT","layer":"tools","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"TypeScript","layer":"languages","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-10-10","last_seen":"2026-10-10","median_stated_pay_usd":null},{"name":"XGBoost","layer":"frameworks","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-06-11","last_seen":"2026-06-11","median_stated_pay_usd":null},{"name":"bandit","layer":"tools","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-06-11","last_seen":"2026-06-11","median_stated_pay_usd":null},{"name":"vLLM","layer":"cloud","postings":1,"share":0.0667,"required":1,"open_postings":1,"first_seen":"2026-03-02","last_seen":"2026-03-02","median_stated_pay_usd":null},{"name":"PEFT","layer":"ai","postings":1,"share":0.0667,"required":0,"open_postings":1,"first_seen":"2026-08-05","last_seen":"2026-08-05","median_stated_pay_usd":null}],"own_products":[],"changes":{"first_appeared":[{"name":"Prompt Engineering","first_seen":"2026-10-13"},{"name":"LangChain","first_seen":"2026-07-10"},{"name":"LangGraph","first_seen":"2026-07-10"},{"name":"AI Agents","first_seen":"2026-07-10"},{"name":"Cursor","first_seen":"2026-07-10"},{"name":"Function Calling","first_seen":"2026-07-10"},{"name":"Model Context Protocol","first_seen":"2026-07-10"},{"name":"OpenAI Codex","first_seen":"2026-07-10"}],"rising":[],"falling":[],"not_seen_180d":[]},"similar_stacks":[{"name":"KE Holdings","url":"https://alion.io/company/ke-holdings/technologies","shared_technologies":35},{"name":"Bilibili","url":"https://alion.io/company/bilibili/technologies","shared_technologies":50},{"name":"360 Security Technology","url":"https://alion.io/company/360-com/technologies","shared_technologies":40},{"name":"01.AI","url":"https://alion.io/company/01-ai/technologies","shared_technologies":41},{"name":"iFlytek","url":"https://alion.io/company/iflytek/technologies","shared_technologies":46},{"name":"DP Technology","url":"https://alion.io/company/dp-8/technologies","shared_technologies":41},{"name":"INTSIG","url":"https://alion.io/company/intsig/technologies","shared_technologies":38},{"name":"StepFun","url":"https://alion.io/company/stepfun-com/technologies","shared_technologies":47}],"html_url":"https://alion.io/company/zhihu/technologies","json_url":"https://alion.io/company/zhihu/technologies.json","license":"CC BY-SA 4.0","meta":{"source":"Alion","built_at":"2026-10-20T12:43:19Z","generated_at":"2026-10-21T00:31:51Z"}}