About Lumysi
Lumysi is a growing startup serving an international market. We are building a health wearable inspired by jewelry. The device continuously and discreetly tracks more than 30 health metrics, including heart rate, HRV, sleep, temperature, recovery, and women’s health. The app transforms this data into useful insights and will be supported by AI.
The first units will be delivered to customers in October 2026.

The Role
We are looking for a Senior Mobile Developer to take primary ownership of the development of the Lumysi application. Because the device does not have a screen, the app represents the entire user experience, making this a highly influential role within the startup.
The selected candidate will be responsible for the development and security of the application, as well as coordination with the hardware team, which is building the device chipset and firmware. Some health measurements will need to be calibrated and calculated through software.
The company has strong growth prospects,



and we therefore offer a clear career path with genuine opportunities for internal progression.
This role requires an established mobile app development profile. It is not intended for purely managerial candidates who are no longer involved in hands-on technical work, early-career professionals who require continuous supervision, or developers whose expertise is primarily focused on backend development.
We value professional maturity in mobile app development, independent judgment, and the motivation to grow alongside the project.

What You Will Do
• Design, develop, and maintain Lumysi’s companion app for Android and iOS.
• Integrate communication with the bracelet through Bluetooth Low Energy (BLE), including pairing, passive background synchronization of biometric data, reconnection management, and battery consumption optimization for both the mobile phone and the device.
• Build the experience that gives meaning to a screenless wearable. The app is the product’s

📌 Lead Mobile Developer (Monterrey)
🏢 Lumysi
📍 Monterrey