Software Engineer - Security Test

Shenzhen , China
full-time Remote

TLDR

Monitor Android-based attack tools and conduct security testing on threat tools to protect PayJoy’s locking products, leveraging advanced machine learning and data science techniques.

About PayJoy PayJoy is a mission-first credit provider dedicated to helping under-served customers in emerging markets to achieve financial stability and success.  Our patented technology for secured credit provides an on-ramp for new customers to enter the credit system.  Through PayJoy’s point-of-sale financing and credit cards, customers gain access to a modern quality of life.  PayJoy’s credit also allows our customers to seize opportunities as micro-entrepreneurs, and provide safety acts as insurance for tough times. Through our cutting-edge machine learning, data science, and anti-fraud AI, we have served over 18 million customers as of 2025 while achieving solid profitability for sustainable growth. This role The Software Security Test Engineer is responsible for consistent effort in monitoring Android-based attack tools and performing security testing on all tools that may be a threat to PayJoy’s lock products. Responsibilities
  • Collect and evaluate hacking tools; continuously monitor emerging attack techniques and tools that could impact company products.
  • Perform security testing on OEM mobile phones using hacking tools and techniques.
  • Reproduce and verify security issues discovered on social media, public forums, and other open sources.
  • Produce, manage, and maintain clear security testing reports.
  • Coordinate with internal teams and external parties to track, prioritize, and verify fixes for security issues.
  • Requirements
  • Bachelor’s degree in a technical discipline such as computer science, software engineering, or a related field. 
  • 4+ years of experience in financial technology services.
  • Strong understanding of Android security architecture.
  • Practical knowledge of secure boot and the device boot chain.
  • Hands-on experience with Android permissions, app sandboxing, and privilege models.
  • Proven experience in security testing — identifying, reproducing, and documenting vulnerabilities in mobile devices or applications.
  • Ability to write clear and structured technical reports.
  • Good English reading and writing skills for report preparation and cross-team communication.

  • Benefits
  • 100% Company Funded : Private Health Insurance for employee and immediate family
  • Company Funded employee life and disability insurance
  • 15 days vacation, unlimited sick leave
  • Phone finance, Headphone, home office equipment and wellness perks.
  • $2,000 USD annual Co-working Travel perk
  • $2,000 USD annual Professional Development perk
  • Phone Finance, headphone benefit, home office equipment allowance and wellness perks
  • PayJoy is proud to be an Equal Employment Opportunity employer and we welcome and encourage people of all backgrounds. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.


    Finance for the next billion * Ownership * Break Through Walls * Live Communication * Transparency & Directness * Focus on Scale * Work-Life Balance * Embrace Diversity * Speed * Active Listening

    Benefits

    Health Insurance

    100% Company Funded : Private Health Insurance for employee and immediate family

    $2,000 professional development perk

    $2,000 USD annual Professional Development perk

    PayJoy is a credit provider focused on empowering under-served customers in emerging markets to achieve financial stability. Our patented secured credit technology opens the door for these individuals to access credit systems through innovative point-of-sale financing and credit cards. By leveraging machine learning and data science, we help our customers thrive as micro-entrepreneurs and navigate economic challenges effectively.

    View all jobs
    Ace your job interview

    Understand the required skills and qualifications, anticipate the questions you may be asked, and study well-prepared answers using our sample responses.

    Software Engineer Q&A's
    Report this job
    Apply for this job