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