Subhajit Bhattacharya

- Architected and led migration of 15+ applications to serverless; achieved ~50% cost reduction (€1 million/year). - Spearheading Lead-to-Cash journey secured €25M program budget and directing delivery across 10 teams (55+ engineers) to deliver ~€10M annual savings. - Designed and implemented multi-region event-driven SSO solution with Microsoft Entra ID. - Designed tiered observability framework (cloud-native & cloud-agnostic).

- 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.

Worked as Technical Lead in Software web application Development. - Delivered 15+ projects, led 8-member teams, achieving 100% on-time delivery with quality. - Automated 3 workflows, reducing 70% manual effort and improving productivity for 2000+ users across multiple departments.