Experience



Saddam Hossain .NET

7 years and 2 months

Dhaka, Bangladesh

Remote

Freelance Software Engineer

Self-employed

May 2018 - Present

Completed 150+ software projects for clients via Upwork, Fiverr, Freelancer, LinkedIn, Twitter, and direct outreach.

Delivered solutions on time and within budget across healthcare, e-commerce, SaaS, and other domains.

Built web apps, APIs, and backend systems using ASP.NET Core, EF Core, and Clean Architecture.

Created and marketed tools and technical content to attract and retain global clients.


Linkiify

2 years and 2 months

Zurich, Switzerland

Remote

Senior Software Engineer

Part-time

May 2023 - Present

Collaborated with the CEO and management to develop top-quality products.

Built scalable .NET applications and streamlined deployments using Azure DevOps CI/CD, reducing release cycles by 30%.

Developed APIs that enhanced system performance by 20% through optimized code and architecture.

Collaborated with leadership to align technical solutions with business objectives, improving user satisfaction.

Skills:

C# · ASP.NET CORE · ASP.NET Core Web API · Entity Framework (EF) Core · LINQ · Microsoft SQL Server · Swagger API · REST APIs · Repository Pattern · Layer Architecture · Blazor (Server side & Web Assembly) · Mudblazor · .NET MAUI · HTML · CSS · Bootstrap · JavaScript · Microsoft Azure · Azure DevOps · Azure SQL · Azure CI/CD · Azure AD B2C · Blob Storage · Web Jobs · In-Memory Cache · Azure Cache for Redis · Stripe, PayPal · xUnit · Fluent Assertions · NSubstitute · NetArchTest · Serilog · Git


Rushd Consulting

2 Months

Riyadh, Saudi Arabia

Remote

Back End Developer

Contract

April 2025 - May 2025

Developed production-grade APIs using ASP.NET Core Web API, improving system scalability by 25% through optimized design patterns.

Implemented Domain-Driven Design (DDD), Clean Architecture, and Vertical Slice Architecture to deliver modular, maintainable backend solutions.

Refactored the codebase to follow clean code principles, enhancing system efficiency by 25%.

Designed and managed database schemas, entity models, and validations to support complex business requirements.

Short-term contract executed concurrently with part-time work at Linkiify.

Skills:

C# · ASP.NET CORE · ASP.NET Core Web API · Entity Framework (EF) Core · LINQ · Microsoft SQL Server · Swagger API · REST APIs · Repository Pattern · Domain-Driven Design (DDD) · Clean Architecture · Vertical Slice Architecture · Git


Bundaberg Sugar Ltd

3 months

Bundaberg, Queensland, Australia

Remote

Dotnet Developer

Contract

May 2024 - Jul 2024 (3 months)

Delivered new features and optimized code for existing web applications.

Improved system reliability by 15% through clean refactoring.

Followed Layered Architecture and the Repository Pattern to ensure maintainability.

Short-term contract executed concurrently with part-time work at Linkiify.

Skills:

C# · ASP.NET CORE · Entity Framework (EF) Core · LINQ · Microsoft SQL Server · Repository Pattern · Layer Architecture · HTML · CSS · Bootstrap · JavaScript · jQuery · Ajax · JSON · xUnit · Fluent Assertions · NSubstitute · NetArchTest · Serilog


Staplefoods

2 years 7 months

Munich, Bavaria, Germany

Remote

Senior Software Engineer

Full-time

Oct 2020 - April 2023 (2 years 7 months)

Collaborated with CEO and management to develop top-quality products.

Built scalable .NET applications, leveraging Azure DevOps CI/CD for seamless deployments, reducing deployment time by 30%

Developed APIs and Blazor apps with Azure AD B2C for secure authentication.

Improved system performance by 25% through optimized code and architecture.

Developed frontend applications with Blazor, achieving a 40% reduction in development time.

Skills:

C# · ASP.NET CORE · ASP.NET Core Web API · Entity Framework (EF) Core · LINQ · Microsoft SQL Server · Swagger API · REST APIs · Repository Pattern · Layer Architecture · Blazor (Server side & Web Assembly) · Mudblazor · .NET MAUI · HTML · CSS · Bootstrap · JavaScript · Microsoft Azure · Azure DevOps · Azure SQL · Azure CI/CD · Azure AD B2C · Blob Storage · Web Jobs · In-Memory Cache · Azure Cache for Redis · Stripe, PayPal · xUnit · Fluent Assertions · NSubstitute · NetArchTest · Serilog · Git


Sidebench

4 months

Los Angeles, California, United States

Remote

Back End Developer

Contract

Sep 2021 - Dec 2021 (4 months)

Built efficient API endpoints for the Kensho Health project.

Improved backend performance by 20% by applying Clean Architecture principles.

Collaborated with the Scrum team to deliver new features on schedule.

Short-term contract executed concurrently with full-time work at StapleFoods.

Skills:

C# · ASP.NET Core · ASP.NET Core Web API · Entity Framework (EF) Core · LINQ · Microsoft SQL Server · Stored Procedures · Dapper ORM · Swagger API · REST APIs · Clean Architecture · Scrum · Jira · Slack · Git


Guardian Life Insurance Limited

4 years 2 months

Dhaka, Bangladesh

Hybrid

Senior Software Engineer

Full-time

Mar 2017 - Sep 2020 (3 years 7 months)

Developed customer-facing portals, reducing processing times by 20%.

Designed internal applications to improve business efficiency by 15%.

Engaged stakeholders for customer portals, ensuring clear technical requirements and gathering feedback.

Initiated project development based on requirements.

Wrote and maintained software, adhering to quality standards and technical specifications.

Independently handled production deployments.

Contributed significantly as a core member of the .NET team, delivering high-quality features within deadlines.

Software Engineer

Full-time

Aug 2016 - Feb 2017 (7 months)

Designed and managed databases based on specific requirements.

Configured and hosted diverse projects on Windows Server 2012 R2.

Implemented interactive business intelligence solutions using SSRS.

Created complex queries, stored procedures, and jobs in SQL Server.

Efficiently integrated the SSLCommerz payment gateway for secure online transactions.

Developed various applications using ASP.NET MVC 5 with an MSSQL database, including Insurance Management, Inventory, Requisition, Online Term Life Insurance, Reinsurance, SME Calculator, and Management Systems.

Skills:

C# · ASP.NET MVC · Entity Framework · LINQ · Microsoft SQL Server · Stored procedure · Dapper ORM · Git · HTML · CSS · Bootstrap · JavaScript · jQuery · Ajax · JSON · Crystal Report · RDLC Report


Index Group

1 year 11 months

Dhaka, Bangladesh

On-site

Software Developer

Full-time

Oct 2014 - Aug 2016 (1 year 11 months)

Developed ASP.NET MVC web applications, enhancing SEO and user experience.

Optimized front-end and back-end code, reducing page load times by 10%.

Installed and maintained internal software applications and systems.

Skills:

C# · ASP.NET MVC · Entity Framework · LINQ · Microsoft SQL Server · HTML · CSS · JavaScript · jQuery · Ajax

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