MERN Stack Developer (CPaaS Experience Required)

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.

• 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

• Minimum 3+ years of experience in MERN stack development
• Strong 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

• 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