About the role
The .NET Developer role consists of building on Microsoft's stack — C#, ASP.NET Core, SQL Server — which quietly runs an enormous share of enterprise, healthcare, and financial software. The modern version (.NET 8) is fast, cross-platform, and cloud-native; the typical engagement bridges a legacy .NET Framework estate to it. If your codebase is C#, you want seniors who've made that journey before.
Monthly rate
$4,500–$7,000/mo
All-in: contract, benefits, equipment, IP
Experience
10+ years typical
Location
Latin America
Argentina · Colombia · Mexico · Chile
Timezone
Full US overlap
Fluent English, onboarded in one week
Core stack
AI tools, daily
Verticals seen
What they own — and what they don't
What they own
- Build APIs and services in C# / ASP.NET Core — modern, cross-platform .NET
- Migrate .NET Framework systems to .NET 8 incrementally, without stopping the business
- Own the data layer: Entity Framework, SQL Server performance, safe schema evolution
- Deploy .NET workloads to Azure or AWS — containers, managed services, CI/CD
- Harden multi-tenant SaaS backends for security reviews (SOC 2 and friends)
What they don't — and who does instead
- Frontend beyond API contracts — pair with a frontend or full-stack profile
- Non-Microsoft backend stacks — ecosystem depth is the point of this hire
- Cloud platform ownership — DevOps territory, though seniors are Azure-fluent
- Desktop/WinForms archaeology as a specialty — we staff for the web and cloud side of .NET
Who hires this role, and for what
Enterprises with a .NET estate and a cloud mandate. Years of C# systems, pressure to modernize, and an in-house team fully booked keeping the lights on.
ISVs and SaaS companies built on C#. The product is .NET, the roadmap is full, and senior C# hiring in the US is slow and expensive.
Healthcare and financial software vendors. .NET's enterprise install base is heaviest in regulated industries — where senior, compliance-aware engineers matter most.
- 01
Framework-to-.NET-8 migration. The canonical engagement: legacy WCF/Framework systems moved to modern .NET without breaking downstream consumers.
- 02
API modernization. ASP.NET Core services replacing aging SOAP/WCF layers, opening the system to modern clients.
- 03
SaaS backend scaling. Multi-tenant C# platforms hardened and scaled — performance, isolation, security review readiness.
- 04
Azure (or AWS) cloud moves. Lifting .NET workloads into containers and managed services, with the CI/CD to match.
Work our engineers at this role have shipped
- ASP.NET Core API layer for an enterprise client, replacing WCF services without breaking downstream consumers
- .NET Framework to .NET 8 migration executed incrementally alongside the client's in-house team
- Multi-tenant SaaS backend (C# + SQL Server) hardened for SOC 2 review
Do you actually need a .NET Developer?
You do, if:
- Your product runs on .NET and senior C# hiring is your bottleneck
- A Framework-to-modern-.NET migration keeps slipping quarters
- SQL Server performance or EF query patterns are a recurring incident source
- Enterprise customers are asking for cloud, SSO, and compliance your current team can't get to
You probably don't, if:
- You're choosing a stack for a new product — we'd usually point greenfield elsewhere unless your team is already C#-native
- The work is one small integration — scope a project, not a hire
- Your pain is Azure infrastructure itself — that's a DevOps profile
Not sure which role fits? Tell us the problem instead of the title — we'll tell you what we'd actually staff, even if it's not this. If it is this: discovery call today, matched profiles in 48 hours, onboarded in a week.
Hire a Senior .NET Developer