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.NET Modernization

We rescue .NET systems that are too critical to rewrite and too old to scale.

.NET Framework, WebForms and WCF moved onto .NET 10 — in stages, while the system keeps running. We don't open with a rewrite. Rewrites are how these projects die.

.NET Framework → .NET 10Focus — Fintech · Payments · Financial backendsUS company · Engineering in Phnom Penh

Core Capabilities

What we do

Assessment & Risk Mapping

Finding out what the system actually does before anyone touches it. Most of these codebases have no current documentation and no original authors.

  • Dependency and integration inventory
  • Undocumented business-rule discovery
  • End-of-support and compliance exposure
  • Staged migration plan with real estimates

Migration Without Downtime

Most of this is new code. Services, APIs and data access get written from scratch on .NET 10 — then run alongside the old path on production data until they've earned the cutover.

  • New services and APIs on .NET 10
  • Boundaries around shared databases
  • Parallel run and output comparison
  • Incremental cutover, reversible at each step

Payments and Financial Logic

The parts that fail silently and produce wrong numbers rather than crashing. This is where a decade of payment-systems work matters most.

  • Reconciliation and settlement logic
  • Idempotency and retry safety
  • Audit trails and traceability
  • Third-party and banking integrations

How We Work

How an engagement starts

The price is here so you don't have to sit through a call to find out whether we're in your range.

MODERNIZATION ASSESSMENT

Fixed price · Start here

Five days to establish what you're actually running: full inventory, risk map, a staged path to .NET 10, and an estimate in weeks and dollars. The document is yours whether or not we do the work — take it to any vendor.

$2,000
Price
5 days
Duration
None
Obligation
LEGACYDEPSDEPSRISKPLANPLAN

STAGED MIGRATION

Follows the assessment

We don't open with a rewrite — but make no mistake, this is a build. New services get written on .NET 10 to replace the old ones, one at a time, while the system keeps serving production. Old and new run side by side on real data before anything is cut over. Greenfield work that grows out of an engagement is quoted the same way.

$20-50k
Typical range
.NET 10
Target
None planned
Downtime
FRAMEWORKBOUNDARYPARALLEL RUNCUTOVER.NET 10

Tech Stack

What we actually work in

Languages

What these systems are already written in.

  • C#
  • VB.NET
  • T-SQL

Legacy frameworks

The layers we work in — and usually the reason the upgrade stalled.

  • .NET Framework 4.x
  • ASP.NET WebForms
  • WCF

Data

Storage and access patterns that ship with most of them.

  • SQL Server
  • Entity Framework
  • ADO.NET

Target & deployment

Where the modernized services end up running.

  • .NET 10
  • Docker
  • Azure / AWS

Contact

Tell us what you're running

Tell us what the system does, how old it is, and what's making you nervous. We reply within one business day, no sales call.

Email
contact@braddocksystems.com
Response time
< 1 business day
Engagement
Assessment, migration, or embedded architect