Mobile Developer – React Native

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October 22

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Quartermaster

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Artificial Intelligence • Cybersecurity • Transport

Quartermaster is a company redefining maritime intelligence by providing unmatched precision and visibility in real-time to monitor the world's most remote waters. Their AI-powered SmartMast system transforms everyday vessels into a comprehensive ocean intelligence network, significantly enhancing the monitoring of maritime activities and addressing issues such as smuggling and illegal fishing. By leveraging onboard sensors and high-bandwidth satellite connectivity, Quartermaster delivers high-resolution detections and actionable insights to users, ensuring enhanced maritime awareness and decision-making.

2 - 10 employees

Founded 2023

🤖 Artificial Intelligence

🔒 Cybersecurity

🚗 Transport

📋 Description

• Create beautiful, easy-to-use, atomic components. Make them adaptable for internationalization to allow the app to scale as the number of features and languages the app supports grows. • End-to-end ownership: feature delivery, performance, reliability, and release operations for both apps. • Offline-first architecture: model data for local-first UX (SQLite/Room or similar), implement sync, conflict resolution, and schema migrations. • Streaming & media: implement and optimize live video ingest/playback, jitter buffers, reconnection, Adaptive Bitrate Streaming (ABR), and Quality of Service (QoS) telemetry. • Kotlin native modules: design and maintain native modules with Kotlin when necessary. • Harsh-network engineering: handle satellite/maritime and field conditions such as high latency, packet loss, power/thermal constraints, and others. • Security by design: SRTP key management, TLS/DTLS, cert pinning, Android Keystore, and privacy-preserving telemetry. • Tooling & quality: tests (unit/integration), CI/CD, profiling, etc.

🎯 Requirements

• Bachelor’s degree in Computer Science, Electrical Engineering, or related field. • Proven experience in hardware and software engineering, with a strong understanding of product lifecycle management. • Familiarity with smart technologies and solutions, particularly in analyzing and supporting deployed systems. • Excellent problem-solving skills and the ability to work collaboratively in a fast-paced environment with people across the globe in various time zones. • Strong communication skills, both written and verbal, to effectively interact with contractors and stakeholders. • 3+ years building mobile apps, 2+ years focused on React Native at scale (navigation, animations, perfect memory/threading management). • Strong Android/Kotlin skills with production RN or fully native apps deployed to the Google Play Store. • Hands-on with offline-first architectures and local databases (SQLite + ORM/query builders like Kysely, Room, or equivalent). • Real-time video experience on mobile: • Protocols: RTSP, SRTP; transports: TCP/UDP. • Stacks: ExoPlayer, ffmpeg-kit, etc. • Concepts: RTP timing, packetization, jitter buffering, keyframe cadence, reconnect/backoff, and Adaptive Bitrate Streaming (ABR). • Networking: understanding of sockets, firewalls, mDNS/zeroconf, WebSockets, QoS metrics (latency, jitter, loss, stall rate). • Proven testing practice with Jest. • Comfortable migrating apps from earlier Expo versions to the latest Expo/React Native/Android releases, config plugins, and bare when needed.

🏖️ Benefits

• Competitive salary • Flexible work hours and the option for remote work. • Opportunities for professional development and continued education.