Sayan Biswas

.NET Developer | ASP.NET Core | Full Stack Web Developer

Talent

KolkataMember since July 9, 2026

C#ASP.NET CoreASP.NET Web API.NET FrameworkEntity Framework CoreReactSQL ServerPostgreSQLHTML5CSS3Performance OptimizationSOLID PrinciplesLINQDependency InjectionAgile Development MethodologiesEnterprise Application Development

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C#ASP.NET CoreASP.NET Web API.NET FrameworkEntity Framework Core

About

Results-driven .NET Developer with 3+ years of experience designing, developing, and maintaining scalable web applications and RESTful APIs using ASP.NET Core, ASP.NET Web API, C#, Entity Framework Core, SQL Server, and PostgreSQL. Proven expertise in performance optimization, enterprise application development, database management, API integration, automated testing, and software architecture. Strong understanding of SOLID principles, Dependency Injection, LINQ, and Agile development methodologies.

Experienced in front-end integration using React, mentoring junior developers, conducting code reviews, and delivering high-quality software solutions.

Experience

Associate System Engineer - ADA Software - India

(2023-01)

Led the technical design and full-cycle development of scalable web applications using ASP.NET Web API, improving overall application performance by 30% and reducing server response time by 20%.
Developed enterprise-grade, resilient web applications utilizing ASP.NET Core technologies and robust JavaScript-based solutions to satisfy complex client business requirements.
Designed, developed, tested, and maintained high-throughput RESTful APIs for seamless, low-latency communication between client-side and server-side applications.
Implemented comprehensive automated unit testing frameworks using NUnit and Moq, reducing production regression defects by 50% while improving long-term code quality.
Conducted structured technical peer code reviews and enforced coding standards while applying SOLID design principles across the deployment pipeline.
Built modern, responsive, and user-friendly web user interfaces leveraging React, HTML5, and CSS3 to complement backend services.
Collaborated with cross-functional product management teams and stakeholders to deliver high-quality software milestones within strict project timelines.
Mentored junior engineers on coding standards, software development best practices, and complex technical problem-solving workflows.
Participated in performance optimization initiatives to enhance backend scalability, memory footprint efficiency, and maintainability.