Senior .NET AI Platform Engineer
Sonata Software5 hours ago
San Antonio, TX, USASenior
Responsibilities
- Design and build production agentic and LLM-enabled platforms with orchestration, tool calling, context management, structured outputs, evaluation, and failure recovery.
- Develop distributed systems and APIs using C#, .NET, and ASP.NET Core with automated testing.
- Architect and operate AWS-based systems across compute, messaging, workflows, identity, secrets, networking, and observability.
- Integrate enterprise LLM platforms through governed, provider-neutral interfaces and contracts.
- Implement authorization, workload identity, secure connectors, secrets management, PII protection, auditability, and AI threat modeling.
- Establish evaluation gates, telemetry, cost controls, and production incident diagnostics for AI and distributed platforms.
- Provide architectural communication, technical decision-making, code reviews, and mentoring.
Requirements
- 8+ years of professional software engineering experience.
- Deep expertise in C#, .NET, ASP.NET Core, API design, distributed systems, and automated testing.
- Production experience designing agentic or LLM-enabled systems.
- Strong AWS architecture and operations experience.
- Experience integrating enterprise LLM platforms through governed interfaces and designing provider-neutral contracts.
- Experience with authorization, workload identity, secure connectors, secrets, PII protection, auditability, and AI threat modeling.
- Experience establishing evaluation gates, telemetry, cost controls, and production incident diagnostics.
- Preferred: hands-on Microsoft Foundry experience, especially with AWS-hosted applications.
- Preferred: mortgage, servicing, lending, financial-services, regulated-data, or enterprise document-processing experience.
- Preferred: experience with MCP, agent catalogs, workflow engines, durable execution, event-driven systems, OpenSearch, or Textract.
- Preferred: experience with incremental cross-cloud migrations, provider abstraction, private connectivity, or Azure-to-AWS transitions.
- Preferred: experience implementing human approvals, preview and commit workflows, provenance records, temporary workspaces, or capability-based policies.
Benefits
- Remote role based in Brazil.