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Intelliflo Saves 65% on Infrastructure with .NET Modernization on AWS

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About Intelliflo

Intelliflo, a leading financial technology company, equips over 30,000 financial advisors worldwide with innovative solutions to streamline their work and elevate client experiences. The Intelliflo platform simplifies the digital landscape, enabling advisors to deliver exceptional financial advice with ease. 

Since March 2021, Intelliflo has focused on transforming the advisory process through flexible, cutting-edge technology that supports every stage of financial planning.


Problem

1. Legacy Application Limitations

Intelliflo’s 19-year-old monolithic application built on .NET Framework 4.7.2 had become increasingly difficult to maintain, scale, and evolve — both technically and organizationally. This legacy architecture slowed down innovation, made refactoring costly, and limited the company’s ability to adopt new technologies.

2. Escalating Infrastructure Costs

Running over 60 Windows Server 2022 EC2 instances on AWS EKS resulted in high compute and licensing expenses. As the customer base expanded, infrastructure costs rose disproportionately, creating inefficiency and budget pressure.

3. Talent Acquisition and Retention Challenges

Recruiting engineers interested in maintaining outdated .NET Framework code was a growing challenge. The aging stack reduced developer motivation and created long-term sustainability risks.

4. Scalability and Performance Constraints

With 600+ controllers in a tightly coupled monolithic ASP.NET MVC structure, scaling the platform required spinning up more Windows servers — an expensive and inefficient approach.

5. Integration Friction with Modern Cloud Services

Connecting the legacy application with modern APIs, CI/CD tools, and AWS-native services demanded complex workarounds, delaying feature releases and limiting innovation velocity.

Integration Friction with Modern Cloud Services

 

Client: Intelliflo
Project type: .NET Application Modernization on AWS

Solution

Incremental Modernization Without Disruption

Rather than a risky “big bang” rewrite, Kloia implemented a phased modernization strategy — ensuring zero downtime and continuous delivery throughout the transformation.

Phase 1: Assessment & Planning

Using AWS Transform, AWS Porting Assistant for .NET, and NDepend, Kloia performed a full assessment of Intelliflo’s codebase, identifying:

- 20+ NuGet packages ready for migration

- 25+ incompatible dependencies requiring refactoring or alternatives

- Complex interdependencies across 23 assemblies

- A critical path centered on the WebClient module (600+ controllers)


Phase 2: Incremental Migration via .NET Standard

The migration leveraged .NET Standard 2.0 as a compatibility bridge — allowing code to work across both .NET Framework and .NET 8.
This approach enabled:

- Continuous deployment during transformation

- Progressive validation and risk mitigation

- Maintained developer productivity

Incremental Migration via .NET Standard

Phase 3: Eight-Milestone Execution Plan

  1. Isolate ASP.NET Framework dependencies
  2. Convert internal NuGet libraries to .NET Standard
  3. Replace incompatible external libraries (e.g., DDay.iCal → Ical.Net)
  4. Gradually convert solution layers to .NET Standard
  5. Transform the 600+ controller WebClient to ASP.NET Core
  6. Migrate and adapt test projects for .NET 8
  7. Set up Linux-based CI/CD pipelines via GitHub Actions
  8. Validate and cut over to production

Technical Highlights

- Migrated Global.asax → ASP.NET Core Startup

- Replaced web.config → appsettings.json

- Migrated OWIN authentication → ASP.NET Core Identity

- Refactored HttpContext → IHttpContextAccessor

- Replaced ChartFX → Chart.js, UltimateSaml → modern SAML providers, and Enyim.Caching → IMemoryCache/IDistributedCache

- Refactored Quartz Windows Services → containerized job schedulers

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Results

Intelliflo’s modernization journey with Kloia was more than a technical upgrade — it was a strategic transformation.
By leveraging AWS Transform and modern .NET practices, Intelliflo achieved measurable outcomes:

- 65% lower infrastructure costs

- 40% higher performance

- 50% faster delivery velocity

- A sustainable, future-proof architecture

This case demonstrates that with the right strategy, partner, and execution, .NET modernization delivers tangible business value — not just technical improvements.

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