Distributed Systems • C# / .NET 10 • AWS & Kubernetes • Enterprise Identity & Security • GenAI & RAG
I am a Staff Software Engineer with 11+ years of experience architecting, scaling, and operating high-throughput cloud platforms, microservices, and distributed backend architectures. My core expertise is built on C# / .NET 10, AWS, Kubernetes, Centralized Identity & Entitlements (OIDC / OAuth2 / Duende), and resilient Event-Driven Architectures.
As a comprehensive full-stack architect, I bridge distributed cloud backends with modern frontend runtimes (React 19, Angular 19+) by mastering browser execution models from first principles to eliminate latency and state discrepancies. In the AI space, I design and implement Enterprise GenAI & RAG systems from mathematical foundations to persistent vector databases.
A collection of first-principles, production-grade systems, visual simulation engines, and architectural assessment hubs:
| System / Interactive Portal | Live Demo | Repository | Primary Stack | Core Architectural Focus |
|---|---|---|---|---|
| Conversational RAG Engine (.NET 10) | 🚀 Launch Portal | 📦 Repo | C# / .NET 10, Qdrant, Groq | Clean Architecture, Vector Search, SSE Streaming & Benchmarking |
| AI Full-Stack Architecture Hub | 🚀 Launch App | 📦 Repo | Vanilla ES6+, CSS3, HTML5 | 9 Interactive Simulators (Saga, OAuth2 PKCE, Event Loop) |
| React & Runtime Architecture Portal | 🚀 Launch App | 📦 Repo | React 19, TS, Vite | Fiber Reconciliation, Concurrency, Closure Internals & RSC |
| Angular Architecture Mastery Portal | 🚀 Launch App | 📦 Repo | Angular 19+, RxJS 7.8 | Signals Primitives, Zoneless CD, OnPush, Micro-Frontends |
| ResuMatch AI | 🚀 Launch App | — | React 19, IndexedDB, Groq | Zero-PII Client-Side AI ATS & Vector PDF Generator |
- 🏢 Current Role: Senior Staff Engineer at Nagarro
- 🛠️ Primary Stack: C# / .NET 10, .NET 8, ASP.NET Core Minimal APIs, AWS (EKS, Lambda, API Gateway), Kubernetes, Docker, Qdrant Vector DB, PostgreSQL, SQL Server
- 🔑 Specialties: Centralized Identity & Entitlement Platforms (Auth0 SaaS, OIDC, Duende IdentityServer), Distributed Systems Design, Domain-Driven Design (DDD), Clean Architecture, Secure Session Propagation
- 🌐 Full-Stack Competencies: First-principles runtime internals for React 19 (Fiber/Concurrent Mode) & Angular 19+ (Signals/Zoneless), TypeScript, SSR Hydration Boundaries
- 🧠 AI Focus: Production Conversational RAG, Qdrant Vector Search, Local (Ollama) & Cloud (Groq) LLM Streaming, Token-level SSE, Retrieval Evaluation
A conversational Retrieval-Augmented Generation (RAG) platform built from first principles in .NET 10, adhering strictly to Clean Architecture, Dependency Inversion, and production evaluation gates.
- 🌐 Live Architecture Portal & Assessment Hub: adarshsince90.github.io/rag-dotnet
- 📦 GitHub Repository: github.com/adarshsince90/rag-dotnet
- 🛠️ Tech Stack: C# / .NET 10, ASP.NET Core Minimal APIs, Qdrant Vector DB, Ollama (Gemma2, nomic-embed-text), Groq Cloud LLM, PdfPig, Server-Sent Events (SSE), Docker Compose
- 📌 Key Highlights:
- First-Principles AI Engineering: Built progressively from raw TF-IDF retrieval and custom cosine similarity math to a persistent vector database (Qdrant with HNSW indexing).
- Multi-Provider AI Strategy: Seamless runtime switching between private local inference (Ollama) and high-throughput cloud inference (Groq) via .NET User Secrets.
- Memory & Real-Time Streaming: Multi-turn sliding context window and token-level streaming through ASP.NET Core SSE (
IAsyncEnumerable). - Automated Evaluation Suite: Integrated 12-question benchmark suite measuring context groundedness, relevance, and hallucination reduction backed by 13 documented ADRs.
- Interactive Architecture Portal: Hosted companion hub featuring interactive pipeline simulators, live query visualizers, and 16 architectural assessment guides.
An open-source visual simulation platform and architecture knowledge base for Staff Engineers, Technical Leads, and Distributed Systems Architects.
- 🌐 Live Production App: adarshsince90.github.io/ai-fullstack-architecture-hub
- 📦 GitHub Repository: github.com/adarshsince90/ai-fullstack-architecture-hub
- 🛠️ Tech Stack: Vanilla ES6+ JavaScript, CSS3 Design System, HTML5, Single-Table JSON Schemas, Google Gemini & OpenAI REST APIs
- 📌 Key Highlights:
- Zero-Dependency Architecture: Built entirely with native browser APIs (zero npm runtimes) for instant loading and GitHub Pages deployment.
- 9 Visual Interactive Simulators: Client-side playgrounds demonstrating Event Loop microtask queues, Distributed Saga orchestrations, OAuth2 PKCE token flows, and RAG vector similarity search.
- 24 In-Depth Architectural Guides: Deep dives into C# 12/13 internals, DDD/CQRS, AWS/Azure cloud topologies, SQL execution plan tuning, and Fiber vs Signals.
- BYOK AI Tutor & Search Index: 292-term engineering index with client-side AI assistant and localized progress tracking.
To ensure complete system integrity across frontend and backend boundaries, I built two specialized architecture and runtime mastery portals dissecting modern web runtimes from the inside out:
- 🌐 Live Interactive Portal • 📦 Repository
- Focus: JS Execution Contexts, Call Stack vs Microtask Queue, Fiber reconciliation tree, Concurrent Mode scheduling, closure state traps, and Server Components (RSC) vs Client streaming.
- Cross-Framework Bridge: Direct mental model translations for enterprise engineers coming from .NET (Task/async, thread synchronization) and Angular.
- 🌐 Live Interactive Portal • 📦 Repository
- Focus: Signal primitives (
computed,effect,linkedSignal), Zoneless change detection execution, Element vs Environment DI trees, micro-frontend module federation, and OnPush optimization. - Enterprise Alignment: Practical alignment with .NET backend lifecycles, OIDC/OAuth2 PKCE token handoffs, and SSR hydration.
A fully client-side, privacy-first resume builder and ATS matching engine.
- 🔗 Live Production App: resumatch-ai-ruby.vercel.app
- 🛠️ Tech Stack: React 19, TypeScript 6, Vite 8, Google Gemini API, Groq Llama 3.3, Vanilla CSS, IndexedDB (
localforage) - 🧪 Test Suite: 139 Vitest Unit Tests • 65 Playwright E2E Specs (CI/CD Pipeline)
- 📌 Key Highlights:
- Zero-PII Privacy Architecture: 100% browser-based IndexedDB storage; zero candidate data stored on external servers.
- Multi-Model BYOK AI Streaming Engine: Real-time response streaming for resume parsing, keyword extraction, and bullet optimization.
- Dual ATS Match Engine: Multi-metric scoring (keyword density, formatting quality, structural audit) with pixel-perfect vector PDF generation.
| Category | Technologies |
|---|---|
| Backend & Microservices | C# / .NET 10, .NET 8 / Core, ASP.NET Core Minimal APIs, EF Core, REST APIs, GraphQL, gRPC, SSE Streaming |
| Distributed Architecture | Microservices, Clean Architecture, Domain-Driven Design (DDD), CQRS, Event-Driven (Kafka/RabbitMQ), Distributed Sagas |
| Cloud & DevOps | AWS (EKS, Lambda, API Gateway, EC2), Azure, Docker & Compose, Kubernetes, Terraform IaC, TeamCity, Octopus, GitHub Actions |
| Security & Identity | OAuth2 (PKCE), OpenID Connect (OIDC), Duende IdentityServer, Auth0 SaaS, Secure Session Proxies, OWASP Top 10 |
| Data & Vector Stores | Qdrant Vector DB, SQL Server (Query Tuning/Execution Plans), PostgreSQL, DynamoDB, MongoDB, IndexedDB, Redis |
| AI & GenAI Systems | Conversational RAG, Vector Embeddings (HNSW), Ollama, Groq, Semantic Kernel, Google Gemini SDK, LLM Evaluation Benchmarks |
| Frontend Runtimes | React 19, Angular 19+ (Signals, Zoneless, Standalone), Next.js, Vite, Fiber Reconciliation, Micro-Frontends |
| Languages | C#, TypeScript, JavaScript (ES2024), SQL, HTML5, CSS3 |
| Testing & Quality | Vitest, Playwright E2E, Unit & Integration Testing, Benchmark Testing, CI/CD Quality Gates |
Global commodities intelligence platform delivering proprietary market data and analytics to enterprise customers.
Key Contributions & Achievements (Click to expand)
- Identity & Access Platform: Designed and developed a centralized identity & authorization platform using Auth0 SaaS and OIDC with Duende Identity Server. Built supporting Access Control Managers and Admin portals to manage client entitlements and application security configurations.
- Secure Session Propagation: Developed proxy authentication services to maintain secure session propagation across multiple independent microservices.
- Enterprise Microservices: Architected and evolved scalable .NET 8 microservices supporting high-volume, latency-sensitive enterprise data workflows.
- DevOps & CI/CD: Streamlined CI/CD pipelines using TeamCity and Octopus Deploy to enhance operational readiness and security-critical deployments.
- GenAI Innovation: Contributed to LLM-based system design patterns (embeddings, vector retrieval, and RAG architectures) focusing on entitlement-aware context generation to prevent cross-customer data leakage.
- Leadership: Mentored junior engineers, promoted clean architecture principles, and led system-wide security and integration discussions.
Distributed merchandise planning platform for enterprise retail operations.
Key Contributions & Achievements (Click to expand)
- Architected and developed backend microservices using .NET Core within a distributed retail operations planning platform.
- Led CI/CD automation, codebase refactoring, and service boundary definitions.
- Collaborated closely with business analysts and product managers to align engineering solutions with business workflows.
Enterprise complaint management platform.
Key Contributions & Achievements (Click to expand)
- Migrated legacy application architecture to .NET Core and AWS serverless (Lambda, API Gateway), reducing cloud hosting costs by ~30% while retaining high availability.
- Developed configurable workflow systems for complaint tracking and resolution.
- Integrated AI-powered APIs for sentiment analysis and text intelligence to categorize tickets automatically.
- Mentored developer teams and improved unit test coverage across the system.
CRM/ERP platform for relocation service providers.
Key Contributions & Achievements (Click to expand)
- Owned the backend service layer and database schema design for a complex CRM/ERP web application.
- Engineered real-time data synchronization between mobile application endpoints and SQL server databases.
- Coordinated cross-functional deliveries across frontend web, backend, and mobile application teams.
- ☁️ AWS Certified Cloud Practitioner
- 🛡️ Microsoft Certified: Azure Fundamentals
- 💻 Angular - The Complete Guide
- 💻 The OWASP Top 10 Demystified
- 💻 Reimagine Software Development Life Cycle (SDLC) with AI
- 💻 Complete SDLC and Pair Programming with AI
- 💻 Generative AI for Beginners: Fundamentals, Tools & Prompts
- 🤖 Learning AI with GitHub Copilot | Pair Programming with AI
- 💼 LinkedIn: /in/adarshpawaskar
- 📧 Email: adarshsince90@gmail.com
- ⚡ RAG .NET Architecture Portal: adarshsince90.github.io/rag-dotnet • Repo
- 🏛️ Full-Stack Systems Hub: adarshsince90.github.io/ai-fullstack-architecture-hub • Repo
- ⚛️ React Runtime Portal: adarshsince90.github.io/react-interview-prep • Repo
🅰️ Angular Architecture Portal: adarshsince90.github.io/angular-interview-prep • Repo- 🤖 ResuMatch AI: resumatch-ai-ruby.vercel.app