Sr. Security Architect


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Job Description

In this role, you will be responsible for designing and driving the adoption of security architectures for the KaiOS ecosystem. You will work with our hardware, software, and cloud services teams to ensure the proper security measures are designed and implemented accordingly.


  • define security best practices, measures, and mechanisms at all levels of the KaiOS stack (hardware/SOC, kernel, libraries, web runtime, first/3rd party applications)
  • develop threat models and associated security architectures/requirements, and design appropriate mitigations
  • collaborate with teams to find solutions that minimizes security exposure to the KaiOS ecosystem
  • act as a expert resource in security to other teams and partners throughout design/development/launch
  • periodically lead security audits of existing software/services (with self/with security partners) and design/implement corrective actions
  • thoroughly document security practices and promote best practices across the whole organization
  • manage Bug Bounty programs
  • point of contact during security audit


  • experience/familiarity with operating system security models/mechanisms (especially Linux and Android)
  • familiarity with web security models, mechanisms, and technologies
  • experience in threat modeling and weaknesses analysis
  • experience conducting/directing penetration testing and security audits and related documentation
  • experience running/leading Bug Bounty programs
  • ability to thrive in a self-directed, fast-paced environment, that is highly collaborative and multi-functional
  • understanding of the latest technologies, security issues, and protocols


  • past experience contributing to open source projects, especially in the area of security vulnerabilities
  • working knowledge of applied cryptography


40K+ TWD/month

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About us

KaiOS Technologies powers an ecosystem of affordable digital products and services. Its flagship product, KaiOS, is the emerging mobile operating system for smart feature phones with more than 100 million devices shipped in over 100 countries. Kai’s mission is to help close the digital divide by bringing mobile connectivity to the billions of people without internet in emerging markets, as well as providing those in established markets with an alternative to smartphones. Devices running on KaiOS require limited memory, while still offering a rich user experience through access to apps like the Google Assistant, WhatsApp, YouTube, Facebook, Google Maps, and Twitter. WE’RE HIRING! We operate as a startup but are backed by several large technology firms. Our team counts over 260 people spreading out in offices in the USA, Brazil, Hong Kong, France, Africa, India, China, and Taiwan. KaiOS is a USA-based company. Below is an overview of our current vacancies. Please send your CV and cover letter to [email protected] if one of these positions fits with your experience and ambitions. US VACANCIES Apps Developer Full Stack Engineer QA automation Engineer HONG KONG VACANCIES Technical Program Manager Channel Marketing Manager Assistant Marketing Operations Manager Backend / Frontend / Full Stack Engineer Visual Designer Director – Business Operations Application Store Legal Counsel IT System Engineer Data Analyst Data Scientist Project Manager Business Development Manager SHANGHAI VACANCIES Application Engineer System Engineer RD Tech Leader Frontend Engineer Customer Program Manager QA Engineer XI’AN VACANCIES System Engineer Automation Test Engineer Frontend Engineer Telecom Engineer BANGALORE VACANCIES Front-end Engineer Gecko Engineer QA Engineer Backend Operation TAIPEI VACANCIES Product Marketing Manager System Engineer Service Engineer Backend Engineer QA Engineer QA Automation Team Leader

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