Android Developer

Role Name: Android Developer (12+ Years)

Location: Washington DC/Virginia/Maryland

Job type: Contract

Job Description:

Must Have Technical/Functional Skills:
- 8+ years of Android development experience.
- Strong proficiency in Kotlin, Jetpack components, Google Wallet, Google Pay, Maps, UWB, NFC.
- Experience with secure networking, offline patterns, and testing.

Roles & Responsibilities
Role Summary:
We are seeking a highly skilled Android Developer with deep hands-on experience in building digital wallet,
payment, location-based, and proximity interaction features using UWB and NFC technologies.

Key Responsibilities:
Wallet & Payments:
- Implement Google Wallet integrations including passes, offers, loyalty cards, transit passes, and identity flows.
- Develop Google Pay payment flows including payment tokenization, merchant validation, and secure transaction handling.
- Integrate with payment gateways and implement validation, error handling, and reconciliation.
- Develop mapping features using Google Maps SDK and Location Services API.
- Implement geofencing, background location tracking, and fused location optimization.
- Build custom map layers, clustering, markers, and real-time route visualizations.
- Build device-to-device ranging and proximity-aware experiences using Android Nearby UWB APIs.
- Implement secure session establishment, peer discovery, and precise distance/angle measurement.
- Develop NFC features using HCE and Reader/Writer Mode.
- Implement NDEF reading/writing, tag interactions, and secure element usage.

General Android Engineering:
- Write modular Kotlin code using MVVM or Clean Architecture.
- Build reusable components and secure, efficient features.
- Apply accessibility, performance optimization, and robust error handling.
- BLE experience.
- Knowledge of tokenization, PCI compliance, and secure payment flow design.
- Experience with modular apps, analytics, crash reporting, and CI/CD.''