I am Rethish Annadurai, building intelligent AI-powered systems.
AI-focused Software Engineer with 3+ years of experience in Python and C# (.NET), building Generative AI systems, intelligent backends, and scalable enterprise applications.
About Me
AI-focused Software Engineer with 3+ years of development experience in Python and C# (.NET), building Generative AI systems, intelligent backends, and scalable enterprise applications.
Delivered production AI solutions including AI chatbots, RAG pipelines, AI agents, and MCP (Model Context Protocol) integrations using Azure OpenAI, Azure AI Foundry, and LLM frameworks. Strong foundation in REST API design, SQL Server, ASP.NET Core, FastAPI, and Azure cloud services — with a quality-first engineering mindset from a QA background.
- ▹Built context-aware AI chatbots & RAG pipelines with Azure OpenAI.
- ▹Engineered MCP integrations for AI-to-system communication.
- ▹17+ successful mobile releases across iOS, Android & UWP.
- ▹2x SNAP Awards for innovation, leadership & measurable impact.
Professional Experience
Software Engineer
Nous Infosolutions LLP, Coimbatore
Joined as Testing Engineer; demonstrated .NET and SQL development contributions leading to full-time developer role in 2023.
- ▹AI Chatbot Development: Designed and built context-aware AI chatbots using LLMs and Azure OpenAI, delivering natural language interfaces for enterprise workflows and internal tooling.
- ▹MCP Integrations: Engineered Model Context Protocol (MCP) tool integrations enabling AI models to interact with external systems, APIs, and data sources in a structured, extensible way.
- ▹AI Resume Screener: Architected an end-to-end Python backend using FastAPI, LLMs, embeddings, and AI agents; implemented RAG pipelines for semantic candidate-to-job matching via Azure AI Foundry.
- ▹ERP Backend Development: Developed backend modules, business logic, and REST APIs for a large-scale US-based ERP application using C#, ASP.NET Core, and SQL Server; optimized complex queries, stored procedures, and database operations for high-volume production systems.
- ▹Deployed scalable async AI processing pipelines using Python FastAPI and Azure Functions; implemented OAuth2 and token-based authentication in .NET Web APIs.
- ▹Azure & DevOps: Administered Azure infrastructure (VMs, RBAC, networking) via ARM templates and PowerShell; managed CI/CD pipelines and production releases with zero rollbacks.
- ▹Mobile Release Ownership: Owned end-to-end packaging, signing, provisioning, and store submissions across iOS, Android, and UWP — 17+ successful releases.
- ▹Developed Python-based BDD test automation framework for legacy mobile stack, achieving 40% faster regression cycles and 15% reduction in defect leakage.
Testing Engineer Intern
Nous Infosolutions LLP, Coimbatore
- ▹Executed functional, regression, and performance testing using JMeter; contributed to 20% reduction in production downtime and improved application stability.
- ▹Designed test cases, reported defects, and participated in QA processes across mobile and web application releases.
Technical Arsenal
Languages & Frameworks
- Python, C#
- .NET (ASP.NET Core)
- FastAPI, Web API
- SQL
Generative AI & LLMs
- LLMs & Prompt Engineering
- RAG, Embeddings, AI Agents
- MCP (Model Context Protocol)
- AI Chatbots & Semantic Search
- Vector Databases, OpenAI SDK
AI Platforms & Cloud
- Azure OpenAI
- Azure AI Foundry
- Azure (VMs, Functions, ARM)
- CI/CD, Git, PowerShell
- GitHub Copilot
Databases & Methods
- SQL Server & Stored Procedures
- Query Optimization, Supabase
- REST API Design, OAuth2
- Agile/Scrum, DevOps Practices
Education
- Bachelor of Computer Science with Cognitive Systems
- Karpagam University, Coimbatore
- CGPA: 8.86
- Class Representative (2019–2022)
- 2019 – 2022
Certifications
- AZ-900: Microsoft Azure Fundamentals
- AI-900: Microsoft Azure AI Fundamentals
- GH-300: GitHub Copilot Certification
- Introduction to Python Programming (Livewire)
- AWS Cloud Computing Workshop (National Level)
Projects
Lender's Friend – Loan Management System
Built and deployed a production Windows Forms app with SQL Server backend to a live customer, improving operational efficiency by 30%. Developed a cross-platform MAUI mobile app with Firebase authentication; currently live in beta across 3 active devices.
AI File Organizer
Built an intelligent file classification, renaming, and organization tool using Python and LLM-based Generative AI, demonstrating practical AI integration in real-world utilities.
News Alert 24/7 – AI News Bot
Built an end-to-end news automation system using n8n, Docker, and Supabase; fetches RSS feeds, rewrites articles via Gemini LLM, and posts approved content to Instagram via Telegram-based review workflow. Deployed on Oracle Cloud with ngrok HTTPS for Telegram webhooks; integrated Instagram Graph API and Supabase for content storage and workflow state management.
Awards & Achievements
- ▹2x SNAP Awards – Recognized for innovation, leadership, and measurable impact at Nous Infosolutions LLP.
- ▹Promoted from Testing Engineer to Software Engineer based on independent development contributions in .NET and SQL, before a formal role change.
Let's Work Together
I'm currently available for freelance opportunities, enterprise AI consulting, and full-stack development projects. If you have a project that needs deep technical expertise in AI or backend systems, let's talk.