AWS re:Invent 2025 - Enterprise-scale App Modernization with Agentic AI through TSRI's JANUS Studio

Enterprise-scale App Modernization with Agentic AI through TSRI's JANUS Studio

The Problem: Legacy Application Challenges

• Retiring legacy technologies like COBOL, where expertise is dwindling
• Growing technical debt in aging applications that can't be easily updated
• Increasing license fees from vendors taking advantage of the situation
• Inability of legacy solutions to meet evolving business needs and innovations

TSRI's Approach: Deterministic AI-Powered Modernization

• TSRI, a leader in the industry recognized in the Magic Quadrant, has been in the business for 30 years
• Leverages a deterministic AI engine called JANUS that provides a known, rule-based output
• Integrates JANUS with generative AI to extract knowledge graphs and drive efficient modernization
• Provides a comprehensive modernization platform called JUNO that automates key steps:
  • Assessing the codebase, services, and dependencies
  • Transforming and migrating the code to modern languages and frameworks
  • Generating documentation, tests, and metadata to ease the transition
  • Refactoring the code using agentic AI recommendations

Technical Details and Capabilities

• JANUS performs lexing, parsing, and transformation of the legacy codebase to an intermediate object model
• Eliminates legacy constructs like GOTO statements and modernizes the code structure
• Applies rules-based refactoring and code quality improvements
• Extracts a knowledge graph that enables generative AI-powered enhancements
• Generates comprehensive documentation, test cases, and metadata to support the modernized application

Business Impact and Examples

• Achieved 90% cost reduction for the United States Air Force, completed in less than 2 months
• Helped a customer replace 36 plans, 29 mainframes across 48 states, transforming the application into a SaaS model on AWS
• Eliminates the need for legacy expertise, reduces technical debt, and avoids escalating license fees
• Enables the modernized application to meet evolving business needs and leverage cloud-native capabilities

Key Takeaways

• TSRI's AI-powered modernization platform automates the complex process of legacy application transformation
• The deterministic JANUS engine and generative AI integration provide a comprehensive, reliable, and efficient modernization solution
• Modernized applications benefit from improved maintainability, reduced costs, and the ability to adapt to changing business requirements
• Real-world examples demonstrate significant cost savings, accelerated timelines, and successful cloud migration of complex legacy systems