Senior .NET Full-Stack Engineer with AI/Cloud Expertise

SAGAR SHAKYA

Santa Ana,CA• 657-***-**** • ****************@*****.*** • linkedin.com/in/sagar-shakya-70aa6912b • github.com/shakyasag

Professional Summary

Senior .NET Full-Stack Engineer with 6+ years of experience designing and delivering scalable, high-performance applications using C#, ASP.NET Core, Angular, and Blazor. Proven expertise in building RESTful APIs, distributed systems, and cloud- based solutions across healthcare and fintech domains. Experienced integrating AI-driven features, including LLM-based workflows, OpenAI GPT-4, and RAG pipelines, with hands-on delivery of a production-grade generative AI voice assistant. Strong collaborator with cross-functional teams, driving system design, performance optimization, and reliable production deployments.

Technical Skills

.NET Backend: C#, .NET Core (.NET 6/7/8), ASP.NET Web API, ASP.NET MVC, .NET Framework, Windows Services, Console Applications, Visual Studio

AI & ML: RAG (Retrieval-Augmented Generation), LLM Workflow Design, AI Agent Architectures, Twilio Voice AI, AI-Assisted Dev (Claude Code, GitHub Copilot, Cursor)

API Design & Integration: RESTful API, GraphQL, SOAP Web Services, SignalR, Webhooks, Third-Party & Internal System Integrations, Swagger/OpenAPI, Postman

Database & Data: MS SQL Server, T-SQL, Stored Procedures, CTEs, Query Optimization, Execution Plans, Indexing, Entity Framework, Dapper, LINQ, MongoDB, Azure SQL, Google BigQuery, ETL/SSIS Architecture & Patterns: Microservices, SOA, Domain-Driven Design (DDD), CQRS, Clean Architecture, Event-Driven Architecture, Azure Service Bus, Repository, Factory, Singleton, OOP Cloud & DevOps: Azure (App Services, Service Bus, Functions, DevOps, Azure SQL), AWS, Docker, CI/CD (Azure DevOps, Jenkins, GitHub Actions), Git, GitHub, Bitbucket

Testing & Quality: xUnit, NUnit, Moq, FluentValidation, AutoMapper, MediatR, Serilog, Unit Testing, Integration Testing, End- to-End Testing, Code Reviews, Technical Documentation Security & Compliance: OAuth2, OpenID Connect (OIDC), JWT, Role-Based Access Control (RBAC), HIPAA Compliance, PCI-DSS

Frontend & UI: Angular (TypeScript, RxJS, Angular Material), Blazor (Server & WebAssembly), HTML5, CSS3, JavaScript, Bootstrap

Collaboration: Agile/Scrum, Jira, Confluence, Technical Mentorship, Stakeholder Communication, ML Engineer & Product Manager Collaboration

Experience

Senior Software Engineer — .NET C# Independent Contractor — Remote May 2024 – Oct 2025

• Designed, developed, and maintained scalable .NET Core 6+ backend solutions supporting data collection, processing, and automation workflows across 3 client environments, integrating RESTful APIs and third-party services.

• Built high-performance API integrations using ASP.NET Web API with CQRS patterns; produced 15+ integration specs reducing cross-team support tickets by 25%.

• Optimized SQL Server query performance achieving 30% speed improvement; maintained 99.9% uptime across all client environments.

• Leveraged AI-assisted development tools (Claude Code, GitHub Copilot, Cursor) to improve delivery velocity; implemented CI/CD via Azure DevOps and GitHub Actions. Senior Software Engineer — .NET C# Cedar Gate Technologies — Healthcare Mar 2022 – Jan 2024

• Designed and maintained scalable .NET Core backend solutions for mission-critical healthcare SaaS workflows serving 500+ healthcare organizations, integrating RESTful and SOAP APIs to support data collection, processing, and exchange pipelines across regulated clinical systems.

• Built ETL pipelines (SSIS) for data ingestion and transformation; designed SQL Server schemas using T-SQL, CTEs, and execution plan analysis — reducing data retrieval time by 40% across large healthcare datasets.

• Led .NET platform modernization (legacy VB.NET to .NET Core 6+); implemented Azure Service Bus event-driven workflows; automated CI/CD via Jenkins and AWS; delivered Power BI and Tableau analytics dashboards, cutting manual reporting effort by 60%+.

• Ensured HIPAA-compliant authentication and authorization using OAuth2 and RBAC; mentored a team of 3–4 junior engineers on .NET best practices and clean architecture.

• Developed a WPF/.NET MAUI Blazor desktop application to automate software deployments with Telerik Kendo UI. Software Engineer — .NET Devfinity (now CFO, USA) — Kathmandu, Nepal Oct 2020 – Mar 2022

• Developed scalable .NET Core backend APIs and data processing services for 3+ enterprise applications (Job Portal, Accounting System, Campaign SMS Platform) serving 10,000+ users, using C#, ASP.NET Web API, SQL Server 2019, and Dapper.

• Implemented Azure Service Bus microservices for asynchronous data workflows; deployed CI/CD pipelines via Azure DevOps and Jenkins; designed full database schema including stored procedures, triggers, and functions.

• Implemented Stripe API for automated subscription management; collaborated with product owners in Agile/Scrum; documented all integration points and processes.

Software Developer — .NET Amnil Technology — Kathmandu, Nepal Jul 2020 – Sep 2020

• Developed Banking Software and HR Management System using C#, ASP.NET Core, SQL Server, Entity Framework, T- SQL, AutoMapper, Dapper ORM, and Angular — building responsive frontend interfaces, designing RESTful APIs for banking integrations, and applying OOP and Repository patterns. Software Engineer — .NET INFICARE PVT LTD — Kathmandu, Nepal Sep 2017 – Dec 2019

• Designed and maintained an Anti-Money Laundering (AML) backend platform integrated with 5+ banking partners, processing high-volume international transactions ($2M+ monthly) using C#, ASP.NET, SQL Server, REST/SOAP APIs, and Windows Services.

• Integrated APIs with international financial data partners (Tranglo, SBI Remit, MoneyGram, Terry Pay); led ASP.NET Classic to MVC modernization; documented all software processes and integration specifications. Technical Projects

Generative AI Voice Assistant — Hospital Appointment System Personal Project 2025

• Architected a Generative AI voice assistant using Twilio and Python (FastAPI) integrated with a .NET Core Web API querying SQL Server for real-time doctor availability and automated appointment booking.

• Implemented LLM-based workflows (OpenAI GPT-4, LangChain) for dynamic response generation — enabling fully automated end-to-end scheduling without human intervention; documented full system architecture and API integration specs.

Data Engineering Intern Abbyrose, Texas Westcliff University Jan 2026 – Feb 2026

• Built scalable BigQuery data models and ETL pipelines for KPI tracking, cohort analysis, customer retention, and revenue forecasting from raw e-commerce transaction data.

• Integrated Power BI with BigQuery via DirectQuery to develop interactive real-time executive dashboards; delivered customer behavior analytics on repeat purchases and sales trends. Education

Master of Science in Computer Science Jan 2024 – Feb 2026 Westcliff University, Irvine, CA

Relevant coursework: Data Engineering, Cloud Computing, AI/ML, Database Systems, Big Data Analytics. Bachelor of Computing (Honours) Jul 2013 – Jul 2017 The British College, Kathmandu, Nepal

Certifications

• Prompt Engineering: How to Talk to the AIs — LinkedIn Learning (Dec 2025)

• Building AI Agents for Beginners — Microsoft via LinkedIn Learning (Jan 2026)

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