Android & Hardware Integration Engineer

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Job Title: Android & Hardware Integration Engineer
Location: Pembroke Pines, FL – Hybrid 3 days onsite per week
Job Type: Direct Hire
Referral Fee: +/- $1500+

Employment Eligibility: Gravity can only consider US Citizens and Green Card Holders at this time.

Position Overview
We’re looking for a talented Android Engineer with strong experience in native Android development and hands-on knowledge of hardware integrations including card readers, biometric devices, and MQTT-based IoT systems. You’ll be part of a team building next-generation timeclocks and mobile solutions that interact directly with physical biometrics readers. Experience with React Native is a strong plus, as we aim for shared knowledge and potential cross-platform development.

Key Responsibilities:

• Design and build Android applications that interface with physical hardware (e.g., card readers, fingerprint sensors).
• Integrate with IoT devices using protocols like MQTT, Bluetooth, and USB/Serial communication.
• Collaborate with firmware, backend, and mobile teams to ensure smooth hardware/software interaction.
• Optimize performance, ensure reliability, and troubleshoot low-level connectivity issues.
• Participate in code reviews and mentor junior engineers as needed.
• Contribute to feature planning and technical architecture decisions.

Required Qualifications:

• 5+ years of native Android development (Kotlin/Java).
• Proven experience integrating external hardware devices (USB, Bluetooth, serial).
• Strong understanding of MQTT or similar IoT communication protocols.
• Experience with biometric systems (fingerprint readers, facial recognition, etc.).
• Familiarity with low-level debugging and performance optimization on Android.
• Good understanding of multithreading, permissions, and lifecycle management on Android.
• Experience with custom in-house Android update systems for remote app deployment and version control outside of the Play Store.

Preferred Qualifications:

• Experience working with IoT ecosystems, embedded systems, or edge devices.
• Exposure to React Native, especially in hybrid environments.
• Familiarity with security standards related to hardware communication and identity verification.
• Experience integrating third-party SDKs and libraries.
• Knowledge of RESTful APIs and SQLite.

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Equal Employment Opportunity Statement
Gravity IT Resources is an Equal Opportunity Employer. We are committed to creating an inclusive environment for all employees and applicants. We do not discriminate on the basis of race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, veteran status, or any other legally protected characteristic. All employment decisions are based on qualifications, merit, and business needs.