Senior Full Stack Engineer

Motion Recruitment; New York (NY); On-site; USD 120,000 - 160,000; Full time

Job summary

Motion Recruitment is seeking an experienced software engineer to build AI-powered applications using C#, .NET, and Azure. You will design RAG pipelines, integrate LLMs into production, and develop backend services exposing AI capabilities.

The role emphasizes guardrails, observability, and human-in-the-loop workflows in collaboration with Product, Data, Platform, and AI teams. Requirements include 5+ years of software engineering experience, strong C#/.NET and Azure expertise, and hands-on

Qualifications

• 5+ years of software engineering experience
• Hands-on experience with Generative AI / LLM integrations
• Experience building production APIs and backend services
• Experience with Retrieval-Augmented Generation (RAG) and agent workflows

Responsibilities

• Design and implement RAG pipelines and agentic workflows.
• Integrate LLMs into production systems using APIs, function calling, and tool orchestration.
• Develop backend services and APIs that expose AI capabilities.
• Implement guardrails, validation logic, observability, and human-in-the-loop workflows.

Skills

C#

.NET

Azure

API design

Backend services

Generative AI integrations

RAG pipelines

Agent workflows

Prompt engineering

Function & tool calling

Tools

Azure OpenAI

Azure AI Search

AKS

Azure Functions

Service Bus

Cosmos DB

SQL

Docker

GitHub Actions

Azure DevOps

Job description

About the Role

What You'll Do

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

Responsibilities

• 5+ years of software engineering experience
• Strong C# / .NET and Azure expertise
• Experience building production APIs and backend services
• Hands-on experience with:
• Generative AI / LLM integrations
• Retrieval-Augmented Generation (RAG)
• Agent workflows
• Prompt engineering
• Function & tool calling
• Experience with SQL, enterprise systems, and cloud-native architectures
• Ability to turn AI prototypes into reliable production applications

Qualifications

Preferred Technologies

• C#, .NET 8+, ASP.NET Core, Azure OpenAI, Azure AI Search, AKS, Azure Functions, Service Bus, Cosmos DB, SQL, Docker, GitHub Actions/Azure DevOps.
• Experience with Semantic Kernel, LangChain, Copilot Studio, Azure AI Foundry, or similar AI orchestration frameworks is a plus.