小红书【REDstar】音频算法工程师
校招全职多媒体算法地点：上海 | 北京状态：招聘
任职要求
1、本科及以上学历，计算机，信号与信息处理和声学等相关专业； 2、熟悉 C/C++ 编程，具备良好的代码规范和系统设计能力； 3、熟悉数字信号处理（DSP）基础理论，了解语音信号处理常用算法； 加分项： 1、参加过DNS等chanllenge比赛，有相关成绩者优先，在interspeech等顶会发表过论文者优先； 2、熟悉常用音频处理工具（如 MATLAB、Python、Audacity）或音频开发框架（如 WebRTC、FFmpeg）者优先； 3、有 Android/iOS 音频开发经验（AudioTrack、OpenS ES、AVAudioEngine 等）优先；
工作职责
1、参与点,直播各场景音频算法，引擎和策略的研发，保障高质量的音频消费体验；
2、参与直播音频引擎的开发，包括音频采集，渲染和混音模块，在多平台完成集成和性能调优；
3、参与音频策略算法的研究，包括但不限于：
①语音降噪（Noise Suppression），回声消除（AEC）等3A算法
②语音合成与修复等AI算法；
③抗丢包与弱网对抗技术（FEC、PLC）等编解码算法
4、跟踪业界前沿音频技术，参与3D 音效和空间音频等方向的调研与业务落地；
5、参与音频质量评测体系建设，配合进行主观/客观音质测试与问题定位。包括英文材料
学历+
C+
https://www.freecodecamp.org/chinese/news/the-c-beginners-handbook/
本手册遵循二八定律。你将在 20% 的时间内学习 80% 的 C 编程语言。
https://www.youtube.com/watch?v=87SH2Cn0s9A
https://www.youtube.com/watch?v=KJgsSFOSQv0
This course will give you a full introduction into all of the core concepts in the C programming language.
https://www.youtube.com/watch?v=PaPN51Mm5qQ
In this complete C programming course, Dr. Charles Severance (aka Dr. Chuck) will help you understand computer architecture and low-level programming with the help of the classic C Programming language book written by Brian Kernighan and Dennis Ritchie.
C+++
https://www.learncpp.com/
LearnCpp.com is a free website devoted to teaching you how to program in modern C++.
https://www.youtube.com/watch?v=ZzaPdXTrSb8
系统设计+
https://roadmap.sh/system-design
Everything you need to know about designing large scale systems.
https://www.youtube.com/watch?v=F2FmTdLtb_4
This complete system design tutorial covers scalability, reliability, data handling, and high-level architecture with clear explanations, real-world examples, and practical strategies.
算法+
https://roadmap.sh/datastructures-and-algorithms
Step by step guide to learn Data Structures and Algorithms in 2025
https://www.hellointerview.com/learn/code
A visual guide to the most important patterns and approaches for the coding interview.
https://www.w3schools.com/dsa/
MATLAB+
https://matlabacademy.mathworks.com/?page=1&sort=featured
Learn MATLAB and Simulink through interactive, in-product exercises
https://www.mathworks.com/help/matlab/getting-started-with-matlab.html
Millions of engineers and scientists worldwide use MATLAB® to analyze and design the systems and products transforming our world.
https://www.youtube.com/watch?v=7f50sQYjNRA
Learn the fundametnals of MATLAB in this tutorial for engineers, scientists, and students.
Python+
https://liaoxuefeng.com/books/python/introduction/index.html
中文，免费，零起点，完整示例，基于最新的Python 3版本。
https://www.learnpython.org/
a free interactive Python tutorial for people who want to learn Python, fast.
https://www.youtube.com/watch?v=K5KVEU3aaeQ
Master Python from scratch 🚀 No fluff—just clear, practical coding skills to kickstart your journey!
https://www.youtube.com/watch?v=rfscVS0vtbw
This course will give you a full introduction into all of the core concepts in python.
开发框架+
[英文] Understanding Modern Development Frameworks: A Guide for Developers and Technical Decision-makers
https://www.freecodecamp.org/news/understanding-modern-development-frameworks-guide-for-devs/
Android+
https://roadmap.sh/android
Step by step guide to becoming an Android developer .
https://www.youtube.com/playlist?list=PLQkwcJG4YTCSVDhww92llY3CAnc_vUhsm
iOS+
https://www.youtube.com/watch?v=UNH0bE4zPtY&list=PLSzsOkUDsvdu5Mm67aBYs2YPu2OM4mFzt
ElasticSearch+
https://www.youtube.com/watch?v=a4HBKEda_F8
Learn about Elasticsearch with this comprehensive course designed for beginners, featuring both theoretical concepts and hands-on applications using Python (though applicable to any programming language). The course is structured in two parts: first covering essential Elasticsearch fundamentals including index management, document storage, text analysis, pipeline creation, search functionality, and advanced features like semantic search and embeddings; followed by a practical section where you'll build a real-world website using Elasticsearch as a search engine, working with the Astronomy Picture of the Day (APOD) dataset to implement features such as data cleaning pipelines, tokenization, pagination, and aggregations.
相关职位
校招内容理解
1、在业务场景下围绕基于大模型的语音识别及合成、音乐理解及生成等方向搭建核心技术，支撑平台业务板块，将AI语音交互技术服务赋能产品线； 2、跟进最领先的基于大模型的语音交互/音乐生成技术，包括但不限于提出新的技术框架、改进现有的算法、持续提升相关技术指标，并撰写论文及申请专利。
更新于 2025-10-15
校招策略算法
1、负责小红书搜广推多场景召回与排序模型优化，提升时长、互动、留存等核心指标； 2、核心技术方向包括：LLM应用于推荐系统，基于搜广推全域信号打通的图神经网络预训练模型，深度进化学习应用于全系统参数自动搜索，多模态在召回/排序等模块的应用等技术方向；在小红书独特的双列社区产品形态下，探索最适合社区产品的种草拔草全链路建模范式； 3、业务落地场景包括：双列推荐/展示/搜索/电商广告的模型，用户/资源冷启动，重排和多资源混排场景等。
校招策略算法
1、基于小红书海量的用户行为数据，建立并优化广告系统的算法和机制，优化面向行业广告主的算法策略，包括用户理解、行业深度优化、行业投放策略等； 2、对业界前沿技术保持敏感，结合业务特点，探索将前沿的算法技术应用于实际业务，实现技术落地。
校招策略算法
1、负责小红书App社区（主站）的推荐、搜索、交易、增长、直播等业务场景的技术探索，能够从复杂的业务环境中抽象出清晰具体的技术问题，并将大模型、机器学习等技术有效应用于小红书App社区建设上，与各部门（包括并不限于产品，基础技术等）的同事一起深入交流合作，共同迭代和优化社区产品，提升亿级用户体验，Inspire Life； 2、构建小红书App社区（主站）的内容、用户之间的生产、关系、分发、消费机制，利用Query理解、多模态内容理解、相关性/召回/排序算法、深度学习、因果推断、迁移学习、跨域表征、多任务学习、图网络、运筹学、博弈机制等技术，持续建设图文&视频内容的大规模推荐/搜索/交易/知识生产等系统，通过策略和模型优化不断提升实现SOTA效果。