Senior Full-Stack Engineer: AI-Powered Backend & LLMs

Motion Recruitment; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

Motion Recruitment seeks a senior software engineer to build AI-powered applications in C#, .NET, and Azure in a New York environment. You will design RAG pipelines, integrate LLMs into production, and deliver backend services with robust guardrails and observability.

Ideal candidates have 5+ years of software engineering, strong Azure expertise, and hands-on experience with API design, tool calling, and AI orchestration.

Qualifications

• 5+ years of software engineering experience.
• Strong C# / .NET and Azure expertise.
• Experience building production APIs and backend services.
• Hands-on with Generative AI / LLM integrations and RAG.
• Familiarity with function calling and tool orchestration.

Responsibilities

• Build AI-powered applications using C#, .NET, and Azure.
• Design and implement RAG pipelines and agentic workflows.
• Integrate LLMs into production systems using APIs and tool orchestration.
• Develop backend services and APIs exposing AI capabilities.
• Implement guardrails, validation, observability, and human-in-the-loop workflows.
• Collaborate with Product, Data, Platform, and AI teams to deliver secure, scalable solutions.

Skills

C#

.NET

Azure

API design

LLM integration

SQL

AI prototyping

Tools

Docker

GitHub Actions

AKS

Azure Functions

Cosmos DB

Job description

Motion Recruitment seeks a senior software engineer to build AI-powered applications in C#, .NET, and Azure in a New York environment. You will design RAG pipelines, integrate LLMs into production, and deliver backend services with robust guardrails and observability.

Ideal candidates have 5+ years of software engineering, strong Azure expertise, and hands-on experience with API design, tool calling, and AI orchestration.