Case Study — Healthcare Services· DIGITAL LENDING

Optimizing Application Performance Through Strategic Migration

Optimizing Application Performance Through Strategic Migration Our client, a leading provider in emergency medical services, relies on fast, accurate patient registration and insurance verification. Their legacy platform slowed down workflows, created system errors, and increased support costs. They collaborated with us to modernize the system so it could run faster, support new features, and reduce the operational burden on staff and IT teams.

Success Highlights

40% Faster Registration Throughput
90% Fewer Severe Errors Post-Migration
20% Reduction in Infrastructure and Support Costs

Key Details

Industry: Healthcare / Emergency Medical Services (EMS)
Geographies: United States
Solution: Strategic modernization from legacy .NET to a modern framework

Business Challenge

The client depended on their application for time-sensitive patient registration and insurance verification, but the legacy stack slowed operations and made change risky.

Legacy framework constraints: The application was built on outdated technology that struggled to keep up with new libraries and updates. This created compatibility issues and increased the risk of errors whenever changes were made.
Complex migration path with many dependencies: The platform had tightly coupled modules, third-party assemblies, and 600+ stored procedures. Any upgrade had to respect these dependencies while preserving billing accuracy and audit trails.
Heavy dependence on WCF and old communication methods: The system used older communication protocols that were difficult to maintain and slowed down interactions between modules. This hurt performance and limited scalability.
High operational overhead: Small fixes required extensive regression testing and manual checks. This slowed down releases and increased maintenance effort for the engineering team.

Our Solution Approach

We designed a staged migration strategy that upgraded the framework, modernized the service layer, and protected all critical billing and registration workflows.

1 · Analyze

Assess Legacy System and Migration Risks

We reviewed the .NET 4.8 codebase, WCF endpoints, third-party assemblies, and 600+ stored procedures to identify compatibility gaps and performance issues. This gave the client a clear picture of what needed to change and reduced the chance of migration failures.

2 · Modernize

Upgrade Framework, Refactor Code, and Optimize Data

We upgraded the runtime, replaced outdated libraries, rebuilt WCF endpoints as REST services, and updated stored procedures for consistency and performance.The system became faster, more modular, and easier to maintain while supporting modern integration patterns.

3 · Architect

Plan the Upgrade Path and Service Redesign

We designed a phased migration path to .NET 8.1 and ABP Framework 8.1, mapped SOAP contracts to REST APIs, and outlined required refactoring for critical modules.This ensured the platform could be rebuilt safely without disrupting patient registration or insurance workflows.

4 · Validate

Test, Stabilize, and Prepare for Cutover; QA

We executed iterative testing across registration, billing, and insurance modules, validated API behavior, and staged the rollout using controlled feature flags.This delivered a clean release with zero critical defects and stable performance from day one.

Technical Highlights

Migrated the app from .NET 4.8 to .NET 8.1.
Adopted ABP Framework 8.1 for cleaner modules and better structure.
Replaced all WCF services with REST APIs.
Standardized DTOs and routing across all endpoints.
Added async I/O to remove blocking calls.
Updated 600+ stored procedures and tuned long-running queries.
Improved transaction handling and connection pooling.
Added structured logs for better debugging and traceability.
Automated API and DB tests for each migration wave.
/* apply brand tokens to any UI component */
POST /api/registration
patient = map(dto)
save(patient)
insurance = verify(patient)
return buildResponse(patient, insurance)

Business Outcomes

The redesigned product delivered measurable improvements across both product and brand performance.

40%

Faster Registration Throughput

Optimized APIs and tuned stored procedures reduced processing bottlenecks.

90%

Fewer Severe Errors Post-Migration:

The modern runtime and cleaner module boundaries eliminated major recurring failures.

20%

Reduction in Infrastructure and Support Costs:

REST APIs, optimized DB calls, and removal of deprecated components reduced overhead.