Senior Software Engineer

About the role

We are looking for a Senior React Native Engineer to build modern tablet applications for restaurant environments, integrating with payment terminals, kitchen devices, and cloud services on Android. You will develop offline-first experiences using React Native, Expo, Redux Toolkit, and React Navigation, consume backend APIs, and implement hardware integrations for POS systems. The role applies AI-assisted development practices and Spec-Driven Development in Subway’s POS Engineering team.

What you will do

• Integrate the POS with payment terminals, Kitchen Display Systems, kitchen printers and other restaurant floor devices;
• Implement device communication for connected and disconnected states over TCP/IP, sockets, UDP and IoT protocols;
• Build native Android modules (Kotlin / Java) for hardware and protocol access and expose them to React Native via native modules / TurboModules;
• Design edge-compute and device topologies so the POS keeps working when cloud connectivity is lost;
• Implement zero-touch onboarding and fleet provisioning for the Android tablet fleet;
• Own the device lifecycle: provisioning, monitoring, remote configuration, OTA updates and decommissioning.

Must haves

• 4+ years of software engineering, including hardware- or device-integrated systems;
• Solid React Native + TypeScript;
• Hands-on native Android (Kotlin and/or Java), including building and bridging native modules to React Native;
• Strong grasp of device and networking protocols: TCP/IP, sockets, UDP, IoT;
• Experience with offline-first app development;
• Android device-fleet provisioning (zero-touch enrollment, device-owner / kiosk modes);
• Experience using AI-assisted development tools (Claude, GitHub Copilot) day to day;
• Upper-intermediate English level.

Nice to haves

• Migrating a legacy Windows / OPOS POS to a cross-platform native stack;
• C / C++ or JNI for low-level device work;
• Cloud IoT platforms (AWS IoT Core / Greengrass or similar);
• Cross-platform device frameworks (e.g. Qt);
• Payment-terminal integration at the device level (tokenization, gateways);
• QSR or retail experience.