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Mobile Security Engineer
PayJoy —Ciudad de México, CDMX
- Tiempo completo
- Informática
- Licenciatura
- Sin título de educación superior
- Seguro dental
- Seguro de la vista

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Mobile Security Engineer

PayJoy -
Ciudad de México, CDMX

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Información del empleo

Tiempo completo

Beneficios

Seguro dental
Seguro de la vista
Seguro de vida

Cualificaciones

Jira
Informática
Firmware
Garantía de calidad
Licenciatura
Desarrollo en Android
Habilidades de comunicación
Debugging
Tecnologías de la información

Descripción completa del empleo

About PayJoy

PayJoy, a Public Benefit Corporation, 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 card offerings, customers gain access to a modern quality of life. PayJoy’s credit also allows our customers to seize opportunities as micro-entrepreneurs, and 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 Product lock analyst - Android security is responsible for testing and helping maintain PayJoy's proprietary device locking technology against various bypass methods and tools, after every OS Over-The-Air (OTA) update, any update to our lock technology itself and any update to the in-market tools.

Responsibilities

Proactively and systematically test PayJoy's device locking mechanism on a diverse range of Android devices and OS versions following every OTA update.
Conduct thorough, periodic testing of the lock after every update or modification to the PayJoy lock technology.
Actively research, identify, acquire, and utilize existing and emerging lock-breaking tools, software, hardware techniques, and methodologies (e.g., factory reset exploits, bootloader vulnerabilities, ADB exploits, custom ROM flashing, FRP bypass tools) to attempt to bypass the PayJoy lock.
Develop, maintain, and execute comprehensive test plans, test cases, and test scenarios specifically focused on lock security, bypass attempts, and anti-tampering features.
Simulate various attack vectors and user behaviors that could lead to a lock bypass.
Document all testing activities, methodologies, findings, discovered vulnerabilities, and precise steps to reproduce in a clear, concise, and actionable manner using our bug tracking system (e.g., JIRA).
Collaborate closely with Android developers, security engineers, and product managers to report vulnerabilities, discuss root causes, propose mitigation strategies, and verify the effectiveness of fixes.
Provide detailed reports on test execution, vulnerability status, and overall lock security posture.
Stay continuously updated on the latest Android security vulnerabilities, platform changes, rooting techniques, bootloader unlocking methods, custom firmware, and new bypass tools/techniques relevant to device locking mechanisms.
Maintain and manage a lab environment with various Android devices, testing tools, and necessary infrastructure.

Requirements

Bachelor’s degree in Computer Science, Cybersecurity, Information Technology, or a related field, or equivalent practical experience.
3+ years of experience in Quality Assurance, with at least 1-2 years specifically focused on mobile application testing on the Android platform, proven hands-on experience and a strong curiosity for attempting to bypass software-based locks, security mechanisms, or device restrictions.
Strong understanding of the Android OS architecture, including bootloader, recovery mode, ADB (Android Debug Bridge), fastboot, system partitions, and security features.
Familiarity with common Android rooting techniques, custom ROMs (e.g., LineageOS), and tools used for device modification (e.g., Magisk, Xposed Framework – for understanding potential attack vectors).
Experience with Android debugging tools (e.g., Android Studio, Logcat, Wireshark/tcpdump for network analysis if relevant).
Meticulous attention to detail, strong analytical, and problem-solving skills.
Excellent written and verbal communication skills, with the ability to document technical issues clearly and effectively.
Ability to work independently, manage priorities, and take ownership of assigned tasks in a fast-paced environment.

Benefits

100% Company-funded Health and dental and vision discount plan for employees and immediate family members.
Life insurance.
Phone finance, Headphone, home office equipment and wellness perks.
30 days of Christmas bonus
20 days paid Vacation
50% Vacation premium
13% Saving funds
$2,000 MXN monthly grocery coupons
$2,000 USD annual Co-working Travel perk
$2,000 USD annual Professional Development perk
Catered lunches

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.

PayJoy Principles

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

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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