At Fujitsu, our purpose is to make the world more sustainable by building trust in society through innovation. Founded in Japan in 1935, Fujitsu has been a pioneer in technology and innovation for decades. Today, as a world-leading digital transformation partner, we are committed to transforming business and society in the digital age.

With approximately 130,000 employees across over 50 countries, Fujitsu offers a broad range of products, services, and solutions. We collaborate with our customers to co-create solutions that drive enterprise-wide digitalization while actively working to address social issues and contribute to the United Nations Sustainable Development Goals (SDGs).

Job Summary

We are seeking an experienced Senior .NET Developer with expertise in Microsoft technologies and Generative AI solutions. The ideal candidate should have strong hands-on experience in .NET, SQL Server, Web APIs, Python, Vector Databases, LLMs, and Azure AI Search to design and develop enterprise-grade applications, intelligent search solutions, and AI-powered platforms. Enterprise use cases such as RAG, semantic search, Vector DB integration, and Azure AI Search are increasingly being applied in internal projects and knowledge retrieval solutions.

Key Responsibilities

• Design, develop, and maintain enterprise web applications using ASP.NET MVC, .NET Core, and C#.
• Develop and consume RESTful Web APIs and microservices.
• Design and optimize complex SQL Server databases, stored procedures, views, and performance tuning.
• Develop AI-powered solutions using Python, LLMs, and Generative AI frameworks.
• Build Retrieval-Augmented Generation (RAG) solutions using Vector Databases and Azure AI Search.
• Implement semantic search, document indexing, embeddings, and intelligent content retrieval.
• Integrate Azure AI Services, OpenAI models, and enterprise data sources.
• Collaborate with business stakeholders, architects, and cross-functional teams to deliver scalable solutions.
• Ensure application security, performance, scalability, and compliance with enterprise standards.
• Participate in code reviews, technical design discussions, and mentoring junior developers.

Required Skills

Microsoft Technologies

• C#
• ASP.NET MVC
• ASP.NET Core
• .NET Framework / .NET 6+
• Entity Framework
• Web API / REST API

Database

• Microsoft SQL Server
• Stored Procedures
• Query Optimization
• Database Design

AI & Generative AI

• Python
• Large Language Models (LLMs)
• Retrieval-Augmented Generation (RAG)
• Prompt Engineering
• Embeddings
• Semantic Search

AI Search & Vector Technologies

• Azure AI Search
• Vector Databases (Azure AI Search Vector Index, Pinecone, Weaviate, Milvus, Qdrant, etc.)
• Document Chunking
• Vector Embeddings
• Similarity Search
• Knowledge Retrieval Systems

Cloud & DevOps

• Microsoft Azure
• Azure Functions
• Azure App Services
• Azure Storage
• Git / Azure DevOps
• CI/CD Pipelines

Preferred Skills

• Azure OpenAI Service
• Agentic RAG
• Microsoft Graph API
• React or Angular

Qualification

• Bachelor's or Master's degree in Computer Science, IT, or related field.
• Strong analytical and problem-solving skills.
• Excellent communication and stakeholder management skills.

Nice-to-Have Experience

• Enterprise AI Assistants / Copilot Solutions
• Intelligent Knowledge Management Systems
• Audit, Compliance, or Document Intelligence Solutions
• Azure AI Search and Vector Search Implementations
• Multi-tenant Enterprise Applications