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 monitoringAdmin tools for device management, telemetry, logs, and insightsOptional : Basic front-end support for landing pages / portalsDatabase & Cloud
Architect relational + time-series databasesSet up AWS / GCP stack :S3, DynamoDB, RDSLambda, API GatewaySNS / SQS, CloudWatchOptimize storage for biosignals + summariesSecurity & Compliance
Implement encryption, secure storage, key managementMaintain HIPAA-like compliance readiness for global expansionManage OTA firmware update logs + secure device identityCollaboration
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.jsStrong command of :AWS / GCPREST APIs, WebSocketsMicroservicesExperience with :MongoDB / PostgreSQL / DynamoDBInfluxDB / TimescaleDB (big plus)Understanding of :
Real-time data systemsData pipelines & time-series processingStorage optimization for sensor dataPreferred Skills (Bonus)
Experience in health-tech / IoT / wearablesBLE-based data ingestionDeploying ML models to backend endpointsFamiliarity with ECG / PPG / IMU data formatsDevOps (CI / CD, Docker, Kubernetes)Security-first engineering (JWT, AES, TLS)Qualifications
B.E. / B.Tech / M.Tech in CS, IT, Computer Engineering, Electronics, or related3–5 years full-stack development experienceStrong GitHub / portfolio demonstrating backend + cloud workPrior startup, R&D, or high-ownership role preferred