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