Legacy Modernization
Evolving Mission-Critical Systems Without Unnecessary Disruption
ASP.NET WebForms & MVC → Modern Cloud-Native .NET 9/10
15+ years of deep domain knowledge allows us to deconstruct monolithic ASP.NET / SQL Server architectures and incrementally modernize them into high-performance .NET 9/10 cloud APIs and modern web frontends.
Structured architectural snapshot optimized for enterprise review and generative search synthesis.
15+ years of deep domain knowledge allows us to deconstruct monolithic ASP.NET / SQL Server architectures and incrementally modernize them into high-performance .NET 9/10 cloud APIs and modern web frontends.
Strangler Fig Reverse Proxy Routing (YARP); Database Dual-Write & Change Data Capture (CDC); AI Intelligence Wrapping on Legacy Core APIs
Unplanned Cutover Downtime: 0.00s • Throughput Performance Boost: 10x • Enterprise Modernizations Shipped: 30+ • Business Logic Parity Preserved: 100%
Strict ISO 27001 & SOC 2 Ready Architecture Discipline
“Legacy Modernization is an enterprise engineering pillar at SHIVAM ITCS specializing in Evolving Mission-Critical Systems Without Unnecessary Disruption. It delivers high-concurrency production software engineered with ASP.NET WebForms & MVC → Modern Cloud-Native .NET 9/10, Monolith Deconstruction & Strangler Fig Pattern Execution, Database Schema Refactoring, CDC & Zero-Downtime Dual-Write Sync.”
Legacy software is often a company’s most valuable intellectual asset, yet it is trapped in aging architectures that resist modern scale, mobile accessibility, and AI integration. Big-bang rewrites fail in over 80% of enterprise cases. At SHIVAM ITCS, we specialize in the Strangler Fig modernization pattern: using reverse proxies (YARP) and event-driven facades to incrementally migrate mission-critical ASP.NET WebForms, WCF, and VB6/C# monoliths into modern .NET 9/10 cloud APIs and Next.js frontends — with 0.00 seconds of unplanned downtime.
Architectural Pillars of this Discipline
Strangler Fig Reverse Proxy Routing (YARP)
Deploying Yet Another Reverse Proxy (YARP) as an edge facade that routes requests between legacy ASP.NET WebForms and new .NET 10 microservices transparently to end users.
Database Dual-Write & Change Data Capture (CDC)
Synchronizing monolithic databases with modern cloud databases in real time using SQL Server CDC, ensuring complete data consistency before final schema decoupling.
AI Intelligence Wrapping on Legacy Core APIs
Wrapping decades-old SOAP/REST legacy endpoints with modern Model Context Protocol (MCP) servers, allowing autonomous AI agents to query legacy ERPs safely.
Engineering Delivery Framework
Codebase Audit & Dependency Graphing
Scanning legacy codebases to map hidden database stored procedures, external COM dependencies, and transaction bottlenecks.
Reverse Proxy Facade Setup
Deploying YARP to capture 100% of incoming application traffic, enabling routing control at the individual URL route level.
Incremental Vertical Slice Migration
Extracting highest-value business domains into clean .NET 9/10 APIs and Next.js frontends, migrating one module per sprint.
Legacy Decommissioning & Performance Audit
Retiring old Windows Servers, verifying zero remaining legacy calls, and optimizing new cloud infrastructure.
CORE DISCIPLINE SPECIALTIES
One Shared Ideology. Three Specialized Perspectives.
Legacy modernization is not just code translation - it requires deep-tech runtime mastery, disciplined 7 R's delivery methodologies, and battle-tested production proof. Cross-navigate between our technology blueprint, service engagement model, and enterprise ERP case study below.
.NET 10 & Strangler Topology
Deep CLR architecture, YARP reverse proxy gateways, C# 13 microservices, and AI-assisted dependency extraction.
7 R's Modernization Service
Methodical 4-phase transformation delivery pods with guaranteed zero downtime and automated regression testing.
Manufacturing ERP Deep-Dive
16-week production migration of a 3-million-line legacy .NET Framework 4.8 monolith without a single second of factory downtime.
No risky big-bang rewrites. We place YARP reverse proxy gateways in front of legacy monoliths and incrementally cut over microservices.
Retire, Retain, Rehost, Replatform, Refactor, Rearchitect, and Rebuild. We optimize for highest business ROI with lowest risk.
Dual-running synchronization and shadow traffic verify state consistency before switching live factory or financial transactions.
Led by co-founders Ajay & Vijay Paliwal with continuous hands-on mastery from VB6/COM to modern containerized .NET 10 on Linux.
Featured Projects & Case Studies in this Discipline
Clearly Inventory - Real-Time Supply Chain & Asset Tracking
Industrial inventory management and barcode scanning platform supporting high-velocity warehouse operations and ERP integrations.
HOS - Hospital Operating System & Clinical Workflow Engine
Mission-critical healthcare operating platform managing outpatient queues, inpatient bed telemetry, clinical EHR, and pharmacy workflows.
SIS - K-12 School Information & Academic System
Comprehensive academic portal handling student enrollments, grading rubrics, attendance tracking, fee gateways, and parent communication.
Enterprise Architecture & System Topologies
Production architectural schematics, AI agent pipeline models, and zero-trust security topologies verified in mission-critical environments.
Enterprise AI Security & Governance Enforcement Topology
Regulated Enterprise AIMulti-layer governance architecture showing pre/post model guardrails, tenant boundary isolation, token rate quotas, and immutable audit trails.
Client Impact & Success
Real feedback from engineering leaders, CTOs, and founders across 15+ years of production deployments.
“Vijay and the SHIVAM ITCS AI team didn't just execute the project - they elevated our entire platform. Their ability to architect complex multi-agent state machines, eliminate latency bottlenecks, enforce zero-hallucination guardrails, and create an intelligent multi-LLM orchestration layer was extraordinary. The final delivery was resilient, battle-tested, and far beyond expectations. One of the strongest AI systems engineering teams in the industry.”
Legacy Modernization FAQ
Direct answers to architectural, technical, and operational questions.
Ready to Architect the Future of Your Enterprise?
Partner with SHIVAM ITCS to modernize legacy monoliths, deploy autonomous multi-agent meshes, or engineer zero-downtime cloud systems. Book an architectural discovery call with our lead architects today.