Senior Software Engineer - Android Systems & Security

Responsibilities

• 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 PayJoy’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 such as 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, MediaTek, etc.).
• Process Automation: Contribute to OTA (Over-the-Air) updates and global device testing.

Requirements

• 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 TrustZone.

Benefits

• 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