Abbas Sabetghadam

Senior .NET Backend Developer — 10+ years of hands‑on C# / .NET

🌍 Remote / Relocation / Sponsorship

sabetsoft@gmail.com @sabetsoft @sabetsoft_dev in/asabetghadam github.com/sabetghadam

Professional Summary

Senior .NET Backend Developer with 10+ years of hands‑on experience building business, e‑commerce, financial and trading systems. Recent focus on ASP.NET Core, C#, EF Core, LINQ, SQL Server, PostgreSQL, stored procedures and triggers. Proven ability to design complex business rules — orders, discounts, promotions, multi‑level commissions — and integrate them across API and database layers. Comfortable with legacy .NET (WebForms, MVC, Web API, XML/SOAP) as well as modern ASP.NET Core, and with frontend integration (Angular, React, TypeScript). Works independently in full‑stack roles and delivers production systems directly from business requirements.

Core Backend Competencies

ASP.NET Core & Web API SQL Server & PostgreSQL LINQ & Data Access E‑Commerce & Business Systems Financial & Trading Systems C# Backend Development Entity Framework & EF Core Stored Procedures & SQL Triggers Complex Business Rules REST APIs & Integrations

Technical Skills

Software Architecture & System Design

Software Architecture & Design Principles
OOP & UML
Domain Modeling & Complex Business Logic
Layered & Modular Architecture
API Design & System Integration
Event‑Driven Design
Legacy System Modernization
Microservice Design & Transaction Workflows
Idempotency & Safe Handling of Repeated Requests
Transaction State Management & Data Consistency

.NET Backend Engineering

C# & .NET
ASP.NET Core
ASP.NET Core Web API
ASP.NET MVC
ASP.NET Web Forms & .NET Framework
Entity Framework Core
LINQ
Authentication, Authorization & JWT
Background Processing & Service Integration
Financial Workflow Reliability
Error Handling & Recovery

Databases & Data Access

Microsoft SQL Server
PostgreSQL & MySQL
Relational Data Modeling
Stored Procedures & Database Triggers
Query Optimization & Performance Tuning

Web Frontend & Backend Integration

Angular
TypeScript
AngularJS
JavaScript
REST API Integration
Frontend–Backend Integration
React & Next.js

DevOps, CI/CD & Deployment

Docker
Linux
Nginx
Git & GitHub
GitHub Actions
CI/CD Pipelines & Automation

APIs, Communication & Distributed Systems

RESTful APIs
WebSockets
JSON & XML
SOAP‑Based Integrations
Asynchronous Processing
External Service Integration
Duplicate Processing Prevention
Reliable Service‑to‑Service Integration

Additional Technologies & Cross‑Platform

Node.js & TypeScript
NestJS
WPF / Desktop Development
Xamarin.Forms / Cross‑Platform Mobile
XML, XSD & XSLT

Testing, Quality & Maintenance

Unit Testing & Testable Design
Code Review & Refactoring
Debugging & Root‑Cause Analysis
Maintainability & Technical Debt Awareness

Software Design & Problem Solving

Requirements Analysis
System Thinking & Complete‑System Understanding
Pragmatic Technical Decision Making
Independent Problem Solving

Legacy Systems & Modernization

ASP.NET Web Forms & .NET Framework
XML, XSD, XSLT & SOAP
Incremental Modernization
Maintaining Long‑Lived Codebases

Professional Experience

Senior .NET Backend Developer Present

Ecomsys — E‑Commerce & Business Management Platform

Develop and maintain the backend of a real‑world e‑commerce and business platform using ASP.NET Core and C#.

Implemented order workflows, discounts, promotions and multi‑level commission systems driven by configurable company plans and customer‑specific rules.

Work with EF Core, LINQ, SQL Server, PostgreSQL, stored procedures and triggers — combining application‑level and database‑level logic where appropriate.

Integrated backend services with the Angular frontend and continue extending the system as new business requirements are introduced.

ASP.NET CoreC#EF CoreLINQSQL ServerPostgreSQLAngular

Full‑Stack .NET Developer 2 months

Coinatik — P2P Cryptocurrency Exchange

Short engagement building backend functionality for a P2P cryptocurrency exchange using ASP.NET MVC and C#.

Implemented Deposit and Withdrawal microservices handling real financial workflows, including transaction state management and reliable integration with external systems.

Dealt with transaction‑reliability problems in practice — repeated requests, duplicate processing and recovery after failures — and addressed them based on the actual requirements of the system.

Worked on P2P trading, multi‑currency wallet, escrow and exchange‑related workflows, and implemented real‑time communication using WebSocket across the SQL Server and AngularJS 1.2 stack.

ASP.NET MVCC#SQL ServerAngularJSWebSocketMicroservicesTransaction ReliabilityIdempotency

.NET Developer 2017–2018

Bitbix — Cryptocurrency Trading Platform

Developed backend functionality using ASP.NET MVC and C#.

Integrated Ethereum‑related functionality using Nethereum and worked on trading, wallet and blockchain‑related application features.

ASP.NET MVCC#NethereumSQL Server

.NET Backend Developer Selected Project

IranCoin — Exchange Platform

Extended a Bitbix‑based fork for localized cryptocurrency exchange requirements.

Worked on wallet, trading, spot and swap‑related backend functionality using ASP.NET MVC, C# and blockchain integration technologies.

.NET / WPF Developer Selected Project

Ecomsys Desktop

Developed desktop functionality using WPF and C#.

Integrated desktop functionality with ASP.NET Core backend services, working with SQL Server and business‑system data operations.

Full‑Stack / Backend Developer Selected Projects

Kabby · Probin · Jandro

Developed backend services and management portals using ASP.NET MVC.

Built cross‑platform applications using Xamarin.Forms, and an Android client with cloud‑connected backend/management system using Android/Java and ASP.NET MVC.

.NET Developer & Technical Lead Earlier Experience

Enterprise, Corporate & Institutional Projects

Developed database‑driven web applications using C#, ASP.NET WebForms and SQL Server.

Worked with ASP.NET AJAX and enterprise web application patterns, and with XML‑based integrations including SOAP, XML, XSD and XSLT.

Developed client‑specific business systems based on practical operational requirements, working directly with clients to turn requirements into working software.

Selected Engineering Work — ActivePage

Object‑Oriented Content Platform Earlier Project

ActivePage — Content Modeling & Viewer

Designed and built ActivePage as an object‑oriented content platform with a flexible content model at its core.

Focused on modeling content as structured objects with their own properties, relationships and behaviour, rather than as flat documents or generic records.

Implemented a content viewer that could render this model consistently and present complex content structures to end users.

The project reflects a long‑standing interest in software design, domain modeling and building complete systems rather than isolated screens or endpoints.

Evolution of My C# / .NET Experience

My experience with C# and .NET spans multiple generations of software development — from object‑oriented business applications and desktop software to ASP.NET Web Forms, ASP.NET MVC, Web API and modern ASP.NET Core systems. Along the way I have worked with SQL Server, XML, XSD, XSLT, SOAP‑based integrations and complex content‑modeling systems, building on a long‑standing foundation in software design and backend engineering.

Engineering Approach

I focus on turning complex requirements into structured, maintainable software — designing domain models, business rules and data relationships that hold up over time. My work is shaped by understanding complete systems rather than implementing isolated endpoints or screens, and by making pragmatic architectural decisions across both legacy and modern .NET codebases. I prefer to work directly with the actual requirements, decide what is appropriate for the problem at hand, and deliver software that behaves correctly in production.

Most source code is private due to client confidentiality. Built by Abbas Sabetghadam · Published under Sabetsoft