Open to opportunities

Sadin_ Rahman

@sadin_rahman

Backend Developer (ASP.NET Core, C#, SQL Server) with 1+ yr building production ERP & microservices systems. Seeking remote backend roles

India

Message

I've built and deployed CareMall Online, a production ERP and e-commerce backend on AWS that processes real financial transactions through a double-entry accounting engine with zero discrepancies since launch. At Sysbreeze Technologies, I delivered 120+ API endpoints across eight ERP modules, integrated Razorpay and Shiprocket, and reduced report generation time by 60% through MongoDB optimization.

I've also developed RESTful APIs and secured application resources with JWT and role-based access control at Bridgeon Solutions, improving API response times by 40% using LINQ optimization, async/await, and SQL Server indexing. My work spans ASP.NET Core, C#, SQL Server, microservices, RabbitMQ, SignalR, Docker, and Clean Architecture.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer

Current

Sysbreeze Technologies Pvt. Ltd.

Nov 2025 - Present (9 months)

Designed and developed a multi-module ERP backend with a REST API layer, delivering 120+ API endpoints across 8 functional modules. Architected a double-entry accounting engine with automated journal posting, maintaining 100% ledger accuracy in live production.

ASP.NET Core C#REST APIs SQL Server MongoDB JWT RBAC AWS Razorpay Shiprocket Clean Architecture Repository Pattern Unit Of Work Microservices Docker CI CD

.NET Backend Developer Intern

Bridgeon Solutions Pvt. Ltd.

Oct 2024 - Oct 2025 (1 year)

Developed and deployed 15+ RESTful APIs using ASP.NET Core Web API and Entity Framework Core, applying repository and dependency injection patterns. Implemented JWT authentication and role-based authorization, and improved API response times by 40% through LINQ query optimization and SQL Server indexing.