Full Stack .Net Developer

TEKsystemsChesterfield, MO
$140,000 - $160,000Remote

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.

Benefits

  • health benefits
  • 401k
  • unlimited PTO
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