Pramurta Nath Ray

GenAI-Assisted Python3 Migration – Cisco Secure Web Appliance

Client - CISCO

• Challenge: Cisco Secure Web Appliance relied on a large Python2 codebase, creating security, compliance, and maintainability risks across multiple appliance components.
• Action:
  Led end-to-end delivery of a GenAI-assisted Python3 migration across multiple subsystems.
  Evaluated and performed risk, security, and usability analysis of AI tools (ChatGPT, GitHub Copilot, Gemini, Claude).
  Selected LLM models per use-case (GPT-4.1, Claude-3.5, O3-Mini), aligning each to migration complexity and risk profile.
  Designed migration architecture through large-scale POCs, validating correctness, security, and performance.
  Enabled IDE-level AI integration (GitHub Copilot + VS Code), accelerating developer productivity.
  Defined secure testing and validation frameworks to ensure AI-assisted code met Cisco security standards.
  Acted as Lead Consultant and client SPOC for Cisco.
• Result:
  Accelerated Python2 → Python3 migration timelines by ~35–40%.
  Reduced manual refactoring effort by ~30% using AI-assisted workflows.
  Established a repeatable, secure GenAI adoption framework reused across teams.
  Improved code quality, maintainability, and long-term support readiness.

SWA Enablement on AWS for AutoScaling

Client - CISCO

• Challenge: Cisco Secure Web Appliance required simultaneous on-prem and cloud-optimized evolution while maintaining high availability and customer SLAs.
• Action:
  Owned solution architecture, release management, and escalation handling for Cisco WSA.
  Coordinated cross-functional teams across development, QA, and operations.
  Designed AWS-based optimizations using Lambda and EventBridge to modernize workflows.
  Served as primary customer interface, managing escalations and roadmap alignment.
• Result:
  Delivered multiple enterprise releases with >99.9% availability.
  Reduced production escalations by ~25% through architectural improvements.
  Strengthened client trust and long-term engagement with Cisco.

FreeBSD-13.0 Upgrade & Sophos AV Upgrade

Client - CISCO

• Challenge: Major platform upgrades were required for Cisco WSA, including FreeBSD 13.0 and Sophos AV integration, without service disruption.
• Action:
  Led end-to-end technical delivery using C, Python, GDB, Shell, Cython.
  Planned and executed OS and security component upgrades under Agile delivery.
  Coordinated CI/CD pipelines using Jenkins and Jira.
• Result:
  Successfully upgraded core platform with zero critical post-release incidents.
  Improved system stability and long-term OS support lifecycle.

SWA Enablement on AWS for China

Client - CISCO

• Challenge: Deploy Cisco Secure Web Appliance on AWS in China, requiring regulatory-compliant architecture.
• Action:
  Led AWS deployment using EC2, S3, DynamoDB, Lambda, CloudFormation, Consul.
  Coordinated regional compliance and cloud constraints.
• Result:
  Delivered compliant cloud deployment within timeline and regulatory boundaries.
  Enabled scalable regional rollout.

Cisco SWA Sustenance

Client - CISCO

• Challenge: Sustaining and enhancing a high-traffic web security appliance with demanding enterprise customers.
• Action:
  Led feature development and sustenance using C, Python, FreeBSD.
  Owned customer escalations and defect resolution.
• Result:
  Reduced high-severity defects by ~20%.
  Improved customer satisfaction through faster turnaround.

SAN / NAS Storage Solution Sustenance

Client - Nexenta

• Challenge: Maintain enterprise SAN/NAS storage reliability across CIFS/SMB environments.
• Action:
  Led sustenance team for NexentaStore appliance.
  Delivered bug fixes using Python, Shell, and Git.
• Result:
  Improved system stability and reduced recurring storage defects.

Central Finance Invoicing Solution

Client - SHELL

• Challenge: Support Shell’s global finance platform across DEV/UAT/PROD.
• Action:
  Developed and supported Java/J2EE financial systems.
  Acted as single SPOC for deployments and go-live.
• Result:
  Ensured uninterrupted invoice processing across multiple global regions.