Full Stack Engineer / Developer

About ONLYQ

ONLYQ is building a next-generation, ultra-sleek, screenless health band integrating multi-modal sensing (ECG, PPG, IMU, BioZ, Temp) with advanced physiological AI.

Our mission is to create  “A Lab on Your Hand”  — a beautifully engineered device that quietly understands your body and supports proactive health.

ONLYQ is a  self-funded initiative  by the founders of  Cymetree Projects LLP , a multi-vertical engineering group with strong experience across healthcare infrastructure, EPC, MEP, and advanced R&D programs.

This foundation gives us the independence to innovate without external pressure, and the stability to build a long-term global product.

As we expand our digital ecosystem for global markets — India, UAE, Singapore, US, and Europe — we are hiring a Full Stack Developer to build and scale the  core cloud + app infrastructure  behind ONLYQ.

Role Overview

We are looking for a highly skilled  Full Stack Developer  who can architect, build, and maintain the complete  app → cloud → insights  pipeline for ONLYQ.

You will work closely with firmware, AI / ML, biomedical, and mobile teams to create a seamless, secure, and scalable digital ecosystem that powers our global wearable intelligence platform.

You will be a key member of the  core founding team , owning major components of ONLYQ’s backend and contributing directly to its global launch roadmap.

Key Responsibilities

Backend Development

Build secure, scalable APIs for the mobile app (iOS & Android)

Develop data pipelines for ECG, PPG, IMU, HRV, and physiological metrics

Architect real-time and near-real-time processing systems

Implement user authentication (OAuth, JWT, AWS Cognito)

Build microservices for AI, personalization, analytics, and dashboards

Frontend / Web

Build internal dashboards for R&D, QA, and algorithm monitoring

Admin tools for device management, telemetry, logs, and insights

Optional : Basic front-end support for landing pages / portals

Database & Cloud

Architect relational + time-series databases

Set up AWS / GCP stack :

S3, DynamoDB, RDS

Lambda, API Gateway

SNS / SQS, CloudWatch

Optimize storage for biosignals + summaries

Security & Compliance

Implement encryption, secure storage, key management

Maintain HIPAA-like compliance readiness for global expansion

Manage OTA firmware update logs + secure device identity

Collaboration

Work closely with :

Firmware team (BLE pipelines)

ML / AI team (serving models, inference endpoints)

Mobile app team (secure sync)

Biosignal scientists (data access & annotation)

Required Skills & Experience

Technical Skills

Strong experience with  Node.js / Python (FastAPI, Django, Flask)

Proficiency with  React / Next.js

Strong command of : AWS / GCP

REST APIs, WebSockets

Microservices

Experience with :

MongoDB / PostgreSQL / DynamoDB

InfluxDB / TimescaleDB (big plus)

Understanding of :

Real-time data systems

Data pipelines & time-series processing

Storage optimization for sensor data

Preferred Skills (Bonus)

Experience in  health-tech / IoT / wearables

BLE-based data ingestion

Deploying ML models to backend endpoints

Familiarity with ECG / PPG / IMU data formats

DevOps (CI / CD, Docker, Kubernetes)

Security-first engineering (JWT, AES, TLS)

Qualifications

B.E. / B.Tech / M.Tech  in CS, IT, Computer Engineering, Electronics, or related

3–5 years full-stack development experience

Strong GitHub / portfolio demonstrating backend + cloud work

Prior startup, R&D, or high-ownership role preferred