Legacy modernisation
Incremental migration from Web Forms, older MVC and tightly coupled systems without betting the business on a big-bang rewrite.
Senior .NET engineering for complex products
I modernise, stabilise and accelerate business-critical .NET software.
I’m Atri Banerjee, a full-stack .NET engineer with 15 years of experience helping international teams improve legacy platforms, SQL Server performance, APIs and cloud-ready applications.
15+Years in software engineering
23K+Client hours delivered
90+Projects and engagements
Core focus
ASP.NET Core · C# · SQL Server · Modernisation
ASP.NET CoreC#SQL ServerAzureReactAngularVueSignalR
How I help
High-leverage engineering for systems that cannot afford disruption.
Practical delivery shaped by legacy constraints, live users, operational risk and measurable business outcomes.
Performance engineering
SQL, Entity Framework, API and application profiling focused on removing the bottlenecks users actually feel.
API and integrations
Secure REST APIs, identity, payments, e-signature, messaging and reliable integrations with external platforms.
Technical leadership
Architecture reviews, rescue plans, delivery decomposition and hands-on implementation for small product teams.
Selected work
View all case studies
Real systems. Clear constraints. Measurable improvement.
Stabilising and Modernising a Long-Running ASP.NET Business Platform
Incremental improvements to a mature Web Forms application covering data access, responsive interfaces, email workflows and performance.
OutcomeFaster critical operations and safer ongoing feature delivery without a disruptive rewrite
Wearable Health Data Platform for Longitudinal Vital-Sign Analysis
Backend APIs, validation and interactive history views for a platform processing multiple physiological measurements from wearable devices.
OutcomeReliable processing and daily, weekly and monthly visibility across multiple vital signs
Engineering notes
Detailed lessons from production .NET work.
No generic listicles—just architecture decisions, migration strategy and performance investigations grounded in real delivery.
Read the blogASP.NET Web Forms to ASP.NET Core: A Low-Risk Modernisation Strategy
How to modernise a mature .NET application incrementally instead of committing immediately to a disruptive rewrite.
How I Reduced a SQL Operation from 55 Seconds to 7 Seconds
A practical investigation into query shape, indexes and data-access behaviour in a production .NET application.
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