Mobile Lead Engineer (React Native)

Jobgether · Brazil

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Mobile Lead Engineer (React Native) based in Brazil.

This role is a senior mobile engineering position focused on building and leading the development of a cross-platform React Native application that interacts directly with BLE-connected hardware devices. You will take ownership of complex mobile features that bridge native iOS and Android capabilities with React Native, ensuring seamless and reliable hardware communication. The role involves solving highly technical challenges such as real-time device control, offline-first synchronization, secure credential handling, and firmware update flows. You will work at the intersection of mobile software and IoT systems, where performance, reliability, and edge-case handling are critical. The environment is highly technical and product-driven, requiring strong ownership and the ability to make architectural decisions. This is a hands-on leadership role for an engineer who thrives in complex mobile + hardware ecosystems.

Accountabilities:

Lead the development of a cross-platform React Native mobile application for iOS and Android, focused on BLE-enabled hardware connectivity and control.
Design and implement native module integrations (Swift/Kotlin) to bridge vendor Bluetooth SDKs with React Native.
Architect and maintain complex BLE workflows, including device pairing, identifier handling, connection management, and real-time state synchronization.
Develop secure and reliable device interaction flows, including locking/unlocking mechanisms, authentication, and timing-sensitive operations.
Build offline-first functionality with queued actions that synchronize when devices reconnect.
Implement secure credential storage, biometric authentication, NFC, and QR-based device onboarding flows.
Ensure robust real-time device monitoring features such as battery status, firmware version tracking, and connectivity states.
Drive engineering best practices, proactively addressing edge cases, failure states, and performance constraints in production mobile environments.

Requirements:

Strong production experience with React Native, including published apps on both iOS App Store and Google Play.
Proven ability to develop or integrate native modules using Swift and Kotlin when needed for advanced functionality.
Deep understanding of mobile architecture, asynchronous programming, and state management in complex applications.
Hands-on experience debugging and optimizing applications on real devices, not just simulators.
Strong engineering mindset with a proactive approach to edge cases, reliability, and failure handling.
Excellent communication skills and fluency in English, with availability during US Eastern business hours.
Demonstrated experience working on complex mobile applications, ideally involving hardware or IoT systems.
Experience with BLE (Bluetooth Low Energy) is highly valued, especially in production environments with real-world connectivity challenges.
Background in enterprise, B2B, or operational applications is a strong plus.

Benefits:

Competitive compensation aligned with experience and technical expertise.
Opportunity to lead architecture and development of a complex IoT-connected mobile platform.
Remote-first work environment with collaboration across distributed teams.
High-impact engineering role with ownership over critical product functionality.
Exposure to cutting-edge BLE, IoT, and mobile-native integration challenges.
Opportunity to work on real-world hardware systems and mission-critical mobile applications.
Strong technical autonomy and influence over engineering decisions.
Dynamic, product-focused environment with complex and stimulating technical challenges.

Mobile pay context

Based on 125 disclosed Mobile salaries on RoleSuite, the role pays a median of $184K/year, with most offers between $175K and $215K (10th–90th percentile: $150K–$254K).

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Mobile Lead Engineer (React Native)

Accountabilities:

Mobile pay context

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