.NET Full Stack Developer — Legacy Modernization & Cloud Migration

*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, CODEOWNERS 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

Application Question(s):

• What specific challenge have you faced when migrating legacy TFC version control history to GitHub Git repositories, and how did you resolve it?
• Describe one migration or refactor you personally architected — what was the before/after, and what tradeoff did you make that someone without hands-on experience wouldn't know to make?
• What's one concrete difference between SharePoint permissions in commercial M365 vs. GCC that has bitten you or a team you worked with?

Ability to Commute:

• Los Angeles, CA 90071 (Preferred)