Senior Software Engineer - Android Systems & Security

This role

This is not a conventional Android app development role (building applications for the Play Store). We are seeking a specialized systems engineer focused on the heart of the operating system: AOSP and the TEE (Trusted Execution Environment).

• Framework Engineering:
  Develop and maintain custom modifications within the Android Framework (AOSP) and Hardware Abstraction Layers (HAL).

• OEM Integration:
  Partner with global smartphone manufacturers and chipset vendors to integrate Pay Joy’s proprietary technology into factory firmware.

• Cross-Border
  
  Collaboration:
  
  Work daily with our China-based engineering team to align on technical specifications and manufacturing requirements.

• Feature Development:
  Implement new locking features that interact with system-level services for example Telephony, Power Management, and Device Policy Manager, etc…

• R&D & Debugging:
  Use deep chip-level knowledge to troubleshoot integration issues across different silicon providers (Qualcomm, Media Tek, etc.).

• Process Automation:
  Contribute to OTA (Over-the-Air) updates and global device testing.

• Android Internals Expertise: Extensive, hands-on experience with AOSP development, including modifying system services and utilizing the Android build system (Soong/Make).

• Low-Level Language Mastery: Expert-level proficiency in Java and C/C++ (JNI). (Ability to read/write Kotlin is expected, but core work remains at the system level).

• OEM/Firmware Background: Proven experience working with or for an OEM or chipset vendor on firmware customization, device bring-up, or security hardening.

• Strong Core
  
  Skills:
  
  Demonstrable knowledge of AOSP and TEE / ARM Trust Zone.

• Note:
  
  If your background is primarily focused on building consumer-facing commercial apps (e.g., banking, gaming, or general retail apps), this role will not be a match for your skillset.

• Experience with Secure Boot, verified boot (AVB), and common Android exploit vectors.

• Automation of firmware build pipelines and signing processes using Python or Bash.

• Comfort collaborating effectively with international teams across different time zones.

• Local benefits depending on the country of hire
• Company-funded health insurance for employee and immediate family
• Company-funded employee life and disability insurance
• Paid vacation days, unlimited sick leave
• $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
• Catered lunches

$272,000 - $283,000 a year. Salary applies to the USA candidates.

Pay Joy 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.