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AI Development ASP.NET C# Programming User Interface / IA Web Development
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Edward Obar C.

@seniordotnetdev

5.0
2

2.3

2.3

100%

Senior Backend Engineer

$30 USD / Hour

・

Flag of

Philippines (6:58 PM)

・

Joined on February 10, 2026

$30 USD / Hour

・

Senior Backend Engineer and Technical Lead with 10+ years of experience architecting, modernizing, and scaling high-availability enterprise systems across healthcare, HR, SaaS, and AI-driven platforms. Specialized in .NET Core, Node.js, and Python, with deep expertise in microservices, distributed systems, and cloud-native architectures on AWS and Azure. Experienced in designing secure RESTful and GraphQL APIs, implementing serverless solutions (AWS Lambda, Azure Functions), containerized deployments (Docker, Kubernetes), and CI/CD automation. Strong technical leader with hands-on architecture ownership, mentoring engineering teams, and delivering complex backend systems from concept to production. Experienced in high-availability systems, distributed architectures, and performance-critical production environments.

Verifications

On time

100%

On budget

100%

Accept rate

75%

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Portfolio

Portfolio

13829449
AI-Powered Automotive Marketplace Intelligence Platform Built a full-stack, AI-driven vehicle marketplace intelligence system that transforms natural language queries into structured automotive search filters and real-time auction insights. The platform combines Next.js (frontend), FastAPI (backend), LLM-based intent parsing, and live web scraping pipelines to extract and analyze car auction data from external marketplaces. Users can search conversationally (e.g., “black BMW M3 under $40k with low mileage”), and the system dynamically: * Parses intent using an LLM-based structured filter engine * Validates and merges filters with existing session state * Scrapes live auction data * Prioritizes “Live Auctions” and falls back to “Models” when needed * Returns enriched results directly into a real-time chat interface - Key Technical Highlights * Next.js App Router with dynamic chat-driven UI * FastAPI microservice architecture** with async scraping * LLM-powered intent classification

AI-Powered Automotive Marketplace

13808369
Designed and developed a collection of production-ready AWS Lambda backend systems using Python and Node.js. These projects include serverless APIs, web scraping systems, job queue processors, AI-powered proposal generators, email automation services, and data extraction tools. Each solution was built using a scalable cloud-native architecture with API Gateway, EventBridge scheduling, PostgreSQL integration, and secure IAM configurations. The systems are optimized for performance, automation, and cost efficiency using AWS serverless infrastructure.

AWS Lambda Serverless Automation Pro

13807838
Developed and deployed a full-scale ASP.NET Core MVC application powering an online Secret Santa platform. The system enables users to create gift exchange groups, manage participants, process secure payments via Stripe, and automate participant matching. Implemented background job scheduling using Quartz.NET for automated reminders and notifications. Integrated Azure Storage for scalable cloud data handling and deployed the application to Microsoft Azure for production reliability. The project follows clean architecture principles, includes Entity Framework Core for database management, and ensures secure configuration for payments and email workflows.

Secret Santa – Azure-Deployed .NET

13807841
Developed and deployed Connexien, an enterprise-grade ASP.NET MVC (.NET Framework 4.8) platform hosted on Microsoft Azure. The system connects financial services firms with highly skilled consultants and specialists through intelligent matching workflows and secure engagement processes. The solution integrates Stripe for secure payment processing, Azure Storage for scalable cloud data management, and Azure Functions for background processing and automation. I designed the architecture with scalability, security, and performance in mind, ensuring reliable operation in a financial-services environment.

Enterprise FinTech Marketplace

13807678
Developed a full-featured 3D product customization platform using React, TypeScript, and Three.js (React Three Fiber). The application allows users to personalize individual shoe components in real time by selecting colors and materials, with instant visual updates rendered in a high-performance 3D environment. Implemented modular component architecture, dynamic material switching, texture mapping, and an export workflow that sends the final configuration to the backend for server-side image generation. Focused on performance optimization, maintainable structure, and a clean UI aligned with Figma design specifications.

3D Product Studio – Interactive Shoe

Developed a full-featured 3D product customization platform using React, TypeScript, and Three.js (React Three Fiber). The application allows users to personalize individual shoe components in real time by selecting colors and materials, with instant visual updates rendered in a high-performance 3D environment. Implemented modular component architecture, dynamic material switching, texture mapping, and an export workflow that sends the final configuration to the backend for server-side image generation. Focused on performance optimization, maintainable structure, and a clean UI aligned with Figma design specifications.

3D Product Studio – Interactive Shoe

13829449
AI-Powered Automotive Marketplace Intelligence Platform Built a full-stack, AI-driven vehicle marketplace intelligence system that transforms natural language queries into structured automotive search filters and real-time auction insights. The platform combines Next.js (frontend), FastAPI (backend), LLM-based intent parsing, and live web scraping pipelines to extract and analyze car auction data from external marketplaces. Users can search conversationally (e.g., “black BMW M3 under $40k with low mileage”), and the system dynamically: * Parses intent using an LLM-based structured filter engine * Validates and merges filters with existing session state * Scrapes live auction data * Prioritizes “Live Auctions” and falls back to “Models” when needed * Returns enriched results directly into a real-time chat interface - Key Technical Highlights * Next.js App Router with dynamic chat-driven UI * FastAPI microservice architecture** with async scraping * LLM-powered intent classification

AI-Powered Automotive Marketplace

13808369
Designed and developed a collection of production-ready AWS Lambda backend systems using Python and Node.js. These projects include serverless APIs, web scraping systems, job queue processors, AI-powered proposal generators, email automation services, and data extraction tools. Each solution was built using a scalable cloud-native architecture with API Gateway, EventBridge scheduling, PostgreSQL integration, and secure IAM configurations. The systems are optimized for performance, automation, and cost efficiency using AWS serverless infrastructure.

AWS Lambda Serverless Automation Pro

13807838
Developed and deployed a full-scale ASP.NET Core MVC application powering an online Secret Santa platform. The system enables users to create gift exchange groups, manage participants, process secure payments via Stripe, and automate participant matching. Implemented background job scheduling using Quartz.NET for automated reminders and notifications. Integrated Azure Storage for scalable cloud data handling and deployed the application to Microsoft Azure for production reliability. The project follows clean architecture principles, includes Entity Framework Core for database management, and ensures secure configuration for payments and email workflows.

Secret Santa – Azure-Deployed .NET

13807841
Developed and deployed Connexien, an enterprise-grade ASP.NET MVC (.NET Framework 4.8) platform hosted on Microsoft Azure. The system connects financial services firms with highly skilled consultants and specialists through intelligent matching workflows and secure engagement processes. The solution integrates Stripe for secure payment processing, Azure Storage for scalable cloud data management, and Azure Functions for background processing and automation. I designed the architecture with scalability, security, and performance in mind, ensuring reliable operation in a financial-services environment.

Enterprise FinTech Marketplace

13807678
Developed a full-featured 3D product customization platform using React, TypeScript, and Three.js (React Three Fiber). The application allows users to personalize individual shoe components in real time by selecting colors and materials, with instant visual updates rendered in a high-performance 3D environment. Implemented modular component architecture, dynamic material switching, texture mapping, and an export workflow that sends the final configuration to the backend for server-side image generation. Focused on performance optimization, maintainable structure, and a clean UI aligned with Figma design specifications.

3D Product Studio – Interactive Shoe

Developed a full-featured 3D product customization platform using React, TypeScript, and Three.js (React Three Fiber). The application allows users to personalize individual shoe components in real time by selecting colors and materials, with instant visual updates rendered in a high-performance 3D environment. Implemented modular component architecture, dynamic material switching, texture mapping, and an export workflow that sends the final configuration to the backend for server-side image generation. Focused on performance optimization, maintainable structure, and a clean UI aligned with Figma design specifications.

3D Product Studio – Interactive Shoe

5.0 · 2 Reviews
Reviews
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Fix Cloudflare Video Stuttering • €100 EUR

Very fast, efficient, helpful, easy to communicate. It was a pleasure to work with Edward.

Szilard K.

@kszili77

•

Flag of

Budapest, Hungary

•

7 days ago

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AI-Enhanced Online DJ Platform • $30 USD

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Trevor S.

@trevors18

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Cambridge, United States

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19 days ago

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Experience

Freelance Senior Backend Engineer| .NET Core, Node.js, Python, AWS, Azure

Jan, 2025 - Present

•

1 year, 2 months

Work From Home

Jan, 2025 - Present

•

1 year, 2 months

• Migrated legacy ASP.NET Framework systems to modern .NET Core, deploying to Azure with serverless integration (Azure Functions) to enhance scalability and cloud efficiency. • Delivered 10+ RESTful API platforms using Node.js, Python, and AWS Lambda, enabling secure third-party integrations and high-availability service architectures. • Architected and launched a subscription-based SaaS platform (IntakeAI), designing authentication, billing workflows, and scalable cloud infrastructure.

Jan, 2025 - Present

•

1 year, 2 months

Senior Software Lead Engineer | .NET core, Node.js, Microservices, AWS, Azure

Aug, 2022 - Dec, 2024

•

2 years, 4 months

WAZILE

Aug, 2022 - Dec, 2024

•

2 years, 4 months

• Led transformation of a legacy monolith into a scalable microservices architecture, reducing system downtime by ~40% and improving overall reliability. • Directed cloud migration and serverless adoption (Azure Functions), reducing infrastructure and maintenance costs while increasing elasticity and SaaS readiness. • Conducted architecture reviews and mentored 12 engineers, raising code quality standards and improving team productivity by ~30%.

Flag of

Manila, Philippines

Aug, 2022 - Dec, 2024

•

2 years, 4 months

Senior Backend Engineer | .NET core, Node.js, Microservices, AWS, Azure

Sep, 2019 - Jul, 2022

•

2 years, 10 months

MITDC

Sep, 2019 - Jul, 2022

•

2 years, 10 months

• Modernized 5 enterprise applications using .NET Core and Node.js, improving system performance by ~20% and enhancing user satisfaction. • Designed and deployed serverless microservices with AWS Lambda, reducing infrastructure costs by ~20% and improving scalability. • Built RESTful and GraphQL APIs supporting secure third-party integrations and modular service expansion.

Flag of

Metro Manila, Philippines

Sep, 2019 - Jul, 2022

•

2 years, 10 months

Education

University of the Philippines

2013 - 2015

•

2 years

Master of Science in Computer Science

Flag of

Philippines

2013 - 2015

•

2 years

University of the Philippines

2009 - 2013

•

4 years

Bachelor of Science in Computer Science

Flag of

Philippines

2009 - 2013

•

4 years

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