Full Stack .Net Developer

TEKsystems•Chesterfield, MO

4d•$140,000 - $160,000•Remote

About The Position

This role is responsible for designing and implementing end-to-end solutions for modern collaboration platforms, with a primary focus on backend architecture, React-based front-end development, and AI powered features. We are seeking a Full Stack Software Developer with deep expertise in backend services, API design, React/TypeScript, and applied AI—along with a strong understanding of SharePoint’s development framework. The ideal candidate has a passion for building scalable, secure, and user-centric applications and is experienced in developing AI-powered solutions that leverage large language models (LLMs), AI agent frameworks, retrieval-augmented generation (RAG), and data-driven intelligence.

Requirements

C#
.net
React
AI
SharePoint
SPFX
Power Platform
Backend services
API design
React/TypeScript
Applied AI
SharePoint’s development framework
Scalable, secure, and user-centric applications
Developing AI-powered solutions that leverage large language models (LLMs), AI agent frameworks, retrieval-augmented generation (RAG), and data-driven intelligence.
Node.js
Azure Functions
Azure App Services
Database design
Caching strategies
Message queues
Background job processing
ReactJS
NextJS
TypeScript
Reusable component libraries
State management patterns
Performance-optimized rendering
Conversational assistants
Intelligent search
Summarization
Data-driven insights
Azure OpenAI
Embeddings
Vector search
Prompt engineering pipelines
Evaluation frameworks
API orchestration layers
Token management
Streaming responses
Cost optimization strategies

Responsibilities

Design, develop, and implement end-to-end SharePoint-based and web solutions, including front-end components, backend services, APIs, and workflows tailored to client needs.
Design, develop, and own backend services, REST APIs, microservices, and data access layers using C#/.NET, Node.js, Azure Functions, and Azure App Services.
Architect scalable, secure, and high-performance backend systems including database design, caching strategies, message queues, and background job processing.
Architect and build modern, responsive user interfaces using React, ReactJS, NextJS, TypeScript, and SPFx, including reusable component libraries, state management patterns, and performance-optimized rendering to deliver exceptional user experiences.
Design, build, and integrate AI-powered features into products, including conversational assistants, intelligent search, summarization, and data-driven insights.
Develop solutions leveraging large language models (LLMs) and AI services (e.g., Azure OpenAI, embeddings, vector search) to enhance user workflows and decision-making.
Implement Retrieval-Augmented Generation (RAG) patterns by combining structured data, documents, and search indexes with LLMs.
Collaborate with architects and product leaders to translate AI use cases into secure, scalable production solutions.
Ensure responsible AI practices, including security, privacy, data access controls, and performance monitoring.
Build and maintain AI agent workflows, prompt engineering pipelines, and evaluation frameworks to continuously improve AI feature quality and reliability.
Design and implement backend infrastructure for AI features, including API orchestration layers, token management, streaming responses, and cost optimization strategies.