Subhajit Bhattacharya

Leading Lead-to-Cash journey modernization across 10 teams (55+ engineers): designed event-driven, multi-service architecture to decompose monolithic legacy systems, establishing API governance, and implementing cross-functional integration standards. Reporting directly to VP Engineering. Architected and led modernization of 15+ applications to serverless framework using event-driven containerized architecture. Driving enterprise-wide Service reusability, replacing duplicated workflows.

- Designed multi-region IoT platform for 50k+ devices (30k+ messages/sec), enabled real-time telemetry to downstream services. - Implemented GDPR-compliant IAM and NIST-aligned DevSecOps guardrails, achieving ISO-27001 standard. - Introduced GenAI-powered customer support chatbot for IoT fleet management, resulting in 25% improvement in customer satisfaction. - Designed monitoring and alerting with CloudWatch and custom pipelines; reduced operational costs by ~15% through proactive detection.

- Partnered with global enterprise clients on RFPs/RFIs; designed winning solutions that contributed to multi-million–euro deal conversions. - Defined secure, scalable, and cost-optimized architectures to migrate legacy applications and data warehouses to AWS, accelerating adoption while ensuring compliance and business continuity. - Designed and governed cloud-native data warehousing and analytics pipelines, enabling clients to unlock new insights and streamline reporting.

Served as Tech Lead, driving architecture review, delivery assurance, and automation for enterprise applications, achieved on time delivery while maintaining quality standards. Collaborated with client teams during requirement analysis to align business goals and technical dependencies across multi-application ecosystems. Mentored junior team members on microservices, API design, and cloud best practices. Automated 3 workflows, reducing 70% manual effort and improving productivity for 2k+ users.

Translated customer requirements design documents, establish specific solutions, and leading the efforts including programming and testing that culminate in client acceptance of the result. Responsible for effective communication between the project team and the customer. Provide day to day direction to the project team and regular project status to the customer. Provide on-call coverage and Production Support for mainframe systems (24*7).