AI + .NET Full Stack Developer (SharePoint) — Legacy Modernization & Cloud Migration

**************************** CANNOT SPONSOR WORK VISA ************************

*********************** Law firm experience is desirable *******************

Company Description

Brxio Software is a software development company dedicated to creating powerful and simple solutions. This position is for our client - a leading financial and professional services company, with footprint in multiple US cities.

Job Overview

We're looking for a senior, hands-on .NET Full Stack Developer to lead three concurrent modernization initiatives: enterprise source control migration, a SharePoint-to-GCC cloud migration with AI-powered search, and legacy application refactoring.

This is not a maintenance role — you will be designing the target architecture, not just executing a checklist.

Location:

This role requires regular onsite/hybrid presence with client teams and secure environments. Candidates must currently reside in, or be immediately willing to relocate at their own expense to, one of the following metro areas:

New York City, Boston, Washington DC, Chicago, Los Angeles, or San Francisco.

Remote-only applicants will not be deprioritized.

What You'll Actually Own

1. Source Control Modernization: TFS → GitHub

You will not simply move repositories. You will design and document the target GitHub architecture from scratch: repo structure and ownership model, branching strategy, environment promotion flow, and required-reviewer policy, secrets management, and CI/CD pipeline design.

Deliverable

: a written architecture and migration runbook another engineer could execute from.

2. SharePoint → GCC Cloud Migration

Migrate SharePoint content and permissions into a

Google Cloud Platform (GCP) Government / Government Commercial Cloud (GCC / Assured Workloads)

., correctly handling the security model differences, permission inheritance quirks, and compliance boundaries that don't exist in commercial M365. You will also evaluate and implement an AI-powered search layer (e.g., Copilot/Graph-based semantic search, Azure AI Search, or equivalent) to replace native SharePoint search — this is a stated priority, not a stretch goal:

• Lead content, data, and workflow migrations from legacy SharePoint environments into

  Google Cloud Platform (GCP) Government / Government Commercial Cloud (GCC / Assured Workloads)

  .

• Navigate strict government security boundaries, IAM, compliance controls (FedRAMP/NIST), and GCP storage architectures.

• Implement AI Search:

  Replace default legacy SharePoint search with advanced AI-driven cognitive search using

  Google Vertex AI Search / Enterprise Search

  (vector search, semantic query processing, and RAG architectures).

3. Legacy Application Refactoring

• Unpack, analyze, and refactor complex legacy monoliths written in

  older .NET Frameworks (Web Forms, WCF, MVC) and legacy VB code (VB.NET / VB6)

  .

• Re-architect legacy logic into modular, high-performance

  modern .NET (NET 8+) APIs

  with

  React

  frontends.

Responsibilities

To be direct: this role is scoped for someone who has actually done this work before, not someone who can describe it. Applications lacking verifiable specifics below will not be considered.

• 7+ years

  professional full stack development experience, including

  3+ years

  with React (or a comparable modern SPA framework) paired with a .NET backend

• Demonstrated, describable experience with

  at least one

  enterprise source-control migration (TFS/SVN/other → Git-based platform) where you owned the target repo/branching architecture — not just ran the migration tool

• Hands-on experience with

  Microsoft 365 GCC or GCC High

  , including its security/compliance differences from commercial M365 (you should be able to speak to specific differences unprompted)

• Working experience with at least one AI-powered enterprise search implementation (Azure AI Search, Copilot/Graph connectors, or similar)

• Direct experience reading, maintaining, or migrating

  VB.NET or classic ASP.NET/WebForms

  code — this is a required skill, not a preference

• Strong SQL Server skills (schema design, performance tuning, migration scripting)

• Must be prepared to complete a technical assessment:

  a scoped architecture and a live technical discussion where you walk through actual reasoning on a comparable migration/refactor scenario. This is how we verify hands-on depth — resume claims alone won't move you forward.

Nice to Have

• Experience with Boomi or another iPaaS platform

• Prior consulting/professional-services background across multiple concurrent clients

• Familiarity with legal, financial services, or another regulated industry's compliance constraints

Pay:

• $100,000.00 - $145,000.00 per year