Mern Stack Developer Cpaas Experience Required Haryana (India)

We are looking for an experienced MERN Stack Developer with hands-on exposure to CPaaS (Communication Platform as a Service) platforms. The ideal candidate will be responsible for developing and maintaining scalable communication solutions, including customer onboarding, campaign management, and billing workflows. Key Responsibilities Develop and maintain web applications using the MERN stack (MongoDB, Express.js, React.js, Node.js) Design and implement backend APIs for messaging, voice, WhatsApp, OTP, and campaign workflows Build modules for customer onboarding, KYC, campaign management, routing, and billing systems Integrate third-party APIs (SMS gateways, WhatsApp Business API, DLT platforms, payment gateways, etc.) Optimize applications for maximum speed and scalability Ensure system security, compliance (TRAI/DLT), and data protection standards Work closely with product, DevOps, and business teams for feature development Troubleshoot, debug, and upgrade existing systems Required Skills & Qualifications Minimum 3+ years of experience in MERN stack development Robust experience in Node.js, Express.js, MongoDB, and React.js Hands-on experience working on or integrating with CPaaS platforms Understanding of SMS, Voice, WhatsApp APIs, SIP, SMPP, or messaging protocols Experience with RESTful APIs and microservices architecture Knowledge of authentication systems (JWT, OAuth, RBAC) Experience with cloud platforms (AWS, Azure, or GCP) Familiarity with Git and CI/CD pipelines Positive to Have Experience with high-volume messaging systems Knowledge of telecom compliance (TRAI, DLT registration, template approval) Experience building billing engines or usage-based pricing systems Docker/Kubernetes knowledge