C#.Net Fullstack engineer ( 50% front end and 50% backend)

Senior C# .NET Fullstack Engineer (AI / LLM Focus)

About the Role

We are looking for a

• Senior Fullstack Engineer
• C#/.NET backend development and modern frontend frameworks (Next.js/React)
• hands-on experience integrating Large Language Models (LLMs) into production systems.

This role is ideal for engineers who enjoy building

• scalable, AI-powered applications, designing robust architectures, and working across the full stack (50% backend / 50% frontend).

Key Responsibilities

AI / LLM Integration

• Design and build end-to-end AI pipelines using LLM APIs (OpenAI, Azure OpenAI, Anthropic)
• Implement streaming AI responses and real-time user experiences
• Apply advanced prompt engineering techniques for reliability and performance
• Develop retrieval-augmented generation (RAG) and document-processing pipelines
• Improve output quality via evaluation frameworks and hallucination mitigation
• Build human-in-the-loop workflows for AI-assisted systems
• Leverage AI developer tools (Copilot, Cursor, Claude Code) in daily workflows

Backend Development (.NET / C#)

• Build and maintain scalable APIs and microservices using .NET (C#)
• Implement asynchronous processing and streaming endpoints
• Integrate backend services with LLM providers
• Apply clean architecture principles and modern design patterns

Frontend Development (Next.js / React)

• Develop modern UI using Next.js (App Router) and React
• Work with Server Components, Server Actions, and streaming UI patterns
• Collaborate closely with backend systems to deliver seamless user experiences

System Design & Architecture

• Design and implement distributed, scalable systems
• Evaluate architectural trade‑offs and ensure long‑term maintainability
• Contribute to technical decision‑making and best practices

Event‑Driven Systems

• Build and maintain event‑driven workflows using tools like Azure Service Bus or RabbitMQ
• Implement asynchronous processing, retries, and message orchestration

Data & Storage

• Design and optimize NoSQL data models (Cosmos DB or similar)
• Handle partitioning, indexing, and performance tuning

Required Qualifications

• Strong experience in C#/.NET backend development (APIs, microservices)
• Hands‑on experience with LLM APIs in production environments
• Solid experience with Next.js and React
• Experience with asynchronous programming and streaming architectures
• Knowledge of event‑driven systems and messaging frameworks
• Experience with NoSQL databases (Cosmos DB or equivalent)
• Strong understanding of system design and distributed systems

Preferred Qualifications

• Experience with Azure ecosystem (Azure OpenAI, Service Bus, Cosmos DB)
• Built AI‑powered applications or RAG‑based systems
• Familiarity with AI evaluation frameworks and guardrails
• Experience with developer productivity tools (Copilot, Cursor, etc.)

What We’re Looking For

• A problem solver who can design and build end‑to‑end systems
• Someone comfortable working across backend and frontend (50/50 split)
• Strong ownership mindset and ability to work in fast‑paced environments
• Passion for AI‑driven product development