This roleThis 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 (Android Open Source Project) and the
TEE (Trusted Execution Environment).
In this role, you will bridge the gap between high-level Android features and low-level hardware integration, ensuring our proprietary security mechanisms-which protect our assets at the OS level-are robust, performant, and tamper-proof.
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 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, MediaTek, etc.).
>- Process Automation: Contribute to OTA (Over-the-Air) updates and global device testing.
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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.
>- 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.
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Desirable Skills (Pluses):- 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.
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Ready to solve complex engineering challenges that almost no one else in the industry is tackling? Apply directly or send me a DM. Let's chat!
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
- Catered lunches
$272,000 - $283,000 a year
Salary applies to the USA candidates.
