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C# / .NET Engineer Experience Level: Mid-Level (3-5 Years) Requirements - 3-5 years of professional software development experience with C# - Strong experience with .NET 6/7/8 (or .NET Core) and/or .NET Framework - Solid understanding of object-oriented programming (OOP), SOLID principles, and common design patterns - Experience building and consuming RESTful APIs (ASP.NET Core Web API) - Hands-on experience with Entity Framework Core (or Dapper) and relational databases - Proficiency with SQL Server (or PostgreSQL/MySQL) - query optimization, schema design, stored procedures - Experience with unit testing frameworks (xUnit, NUnit, or MSTest) and mocking libraries (Moq, NSubstitute) - Familiarity with Git version control and collaborative workflows (pull requests, code reviews) - Understanding of asynchronous programming (async/await, Task-based patterns) - Experience with dependency injection and middleware in ASP.NET Core - Bachelor's degree in Computer Science, Engineering, or equivalent practical experience
Project ID: 40613968
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107 freelancers are bidding on average $2,199 USD for this job

With over two decades of professional experience in software engineering and a Bachelor's degree in Computer and Information Technology Engineering, I believe my profile fits the bill for your C#/.NET developer role perfectly. Throughout my career, I've taken on various challenges, both technical and managerial, and excelled in each one of them. In fact, prior to moving into freelancing, I've held key positions such as Tech Lead and Project Manager. This dual skillset equips me to not just code but also lead projects with a seasoned perspective. In terms of technical expertise, I've got in-depth know-how with .NET technologies including C#, Windows Form, WPF, ASP.NET Core, Angular, WCF, UWP - meaning your project is in hands of someone well-versed with the arena. To add to that, I'm experienced with various web apps and have strong knowledge of REST services along with adequate database proficiency (MsSql Server, PostgreSQL) - necessary for effective functioning and optimization. Aside from my competency with the latest frameworks and patterns like NET 6/7/8 or NET Core and async / await programming (Task-based patterns), what sets me apart is my approach to work. Skills: - .NET - ASP.NET - C# Programming - Microsoft SQL Server - MySQL - PostgreSQL Thank you very much for considering my application!
$3,000 USD in 30 days
8.4
8.4

I would approach this by building a clean .NET architecture with proper separation of concerns, scalable API design, optimized database queries, and testable business logic. I focus on ASP.NET Core, EF Core, dependency injection, async workflows, and SOLID principles to create maintainable applications that are easy for teams to extend. Are you looking for feature development on an existing system or building a new application from the ground up? Please ping me to get started and deliver outstanding results Thanks!!!
$2,400 USD in 7 days
8.1
8.1

I am a seasoned C#/.NET developer with over 4 years of hands-on experience in software development, proficient in .NET 6 and working knowledge of both .NET Framework and .NET Core. My expertise aligns strongly with your project's needs, particularly in building and deploying RESTful APIs using ASP.NET Core Web API. I have demonstrated expertise in object-oriented programming and a deep understanding of SOLID principles. Additionally, I have practical experience in working with Entity Framework Core and optimizing SQL queries in SQL Server, ensuring robust and efficient database interactions. My background includes unit testing using xUnit, along with proficient use of Git for version control, including conducting and participating in code reviews. Proficient in asynchronous programming and skilled in implementing dependency injection and middleware, I am well-prepared to contribute to your project's success. I am eager to learn more about this opportunity and discuss how my skills can be beneficial for your goals. Could we schedule a time for a brief call?
$3,000 USD in 20 days
8.0
8.0

Your C#/.NET engineer role aligns well with my experience building maintainable backend and desktop systems in C#, ASP.NET Core, .NET 6/7/8, and SQL Server/PostgreSQL. I have delivered production REST APIs, integrations, and data-driven applications using clean OOP, SOLID principles, async/await, dependency injection, and well-defined service/repository layers. I would first review the existing solution, database schema, API contracts, and current Git workflow. From there, I can implement or extend ASP.NET Core Web API endpoints, apply EF Core migrations and efficient LINQ/SQL queries, and use stored procedures where they provide a clear performance benefit. I will keep concerns separated through middleware, validation, structured error handling, and DI, while ensuring endpoints are secure, predictable, and easy to consume. For reliability, I will add focused xUnit tests with Moq for business logic and API behavior, review query plans for slow database operations, and submit clean, reviewable commits through pull requests. My background includes .NET/C#, REST integrations, SQL Server, MySQL, PostgreSQL, Docker, and Azure-based delivery. Is your current codebase primarily on modern .NET 6/7/8, or does it also include .NET Framework components? Muhammad Saad
$1,650 USD in 4 days
7.1
7.1

Dear client, I have 14+ years of experience in .net core,.net framework and csharp wpf along with git, svn,tfs. I have worked over several enterprise projects and i am well aware of solid oops principals as well as async await (state machine) and task async programming (thread based). Kindly reply back to my bid and I’ll send you my most recent works like pos application, shippingportal, mizuho bank - maker checker approver digital onboarding application, sports insurance platform and many more. My speciality is design architecture and creating maintainable reusable and testable code using solid principals.
$1,500 USD in 20 days
7.3
7.3

Hiring for a mid-level C#/.NET engineer covers a lot of ground, but the places these projects usually slow down are EF Core query performance, async code that's technically correct but still blocks under load, and APIs that become hard to maintain without consistent dependency injection and SOLID boundaries. My approach is to first understand the current codebase and how it's structured, then focus on the areas that matter most: API behavior, data access, and test coverage. In ASP.NET Core, keeping DbContext scoped correctly and avoiding unnecessary tracking on read-only queries with `AsNoTracking()` can make a noticeable difference without adding complexity. I'd also make sure new work fits the existing Git workflow with clean pull requests and maintainable code rather than isolated fixes. Is this work on an existing application or a new .NET project from scratch?
$3,000 USD in 20 days
6.9
6.9

With over five years of experience in C#/.NET development, specializing in .NET 6/7/8, Core, and Framework, I bring strong expertise in object-oriented programming, SOLID principles, and design patterns. Proficient in building RESTful APIs using ASP.NET Core and Entity Framework Core for data access, I excel in SQL optimization and schema design. Skilled in unit testing, Git version control, asynchronous programming, dependency injection, and middleware. Eager to discuss and exceed your project expectations with my blend of theoretical knowledge and practical experience.
$2,700 USD in 5 days
6.8
6.8

Hello, I understand you're looking for a C#/.NET engineer who can contribute immediately to developing and maintaining robust backend applications. With 8+ years of experience in C#, .NET Framework, .NET Core, .NET 6/7/8, ASP.NET Core Web API, SQL Server, Azure, and enterprise application development, I have built RESTful APIs, microservices, and business applications across fintech, supply chain, ERP, and healthcare domains. I have extensive experience with Entity Framework Core, asynchronous programming, dependency injection, SOLID principles, design patterns, Git workflows, Azure DevOps, and code reviews. I also have experience writing unit tests using xUnit and MSTest to ensure application reliability. I can help you: Develop and enhance applications using C# and .NET 6/7/8 Design and implement secure RESTful APIs Build scalable business logic following SOLID principles Optimize SQL Server queries and database performance Implement Entity Framework Core and asynchronous programming Write unit tests and participate in code reviews Deliver clean, maintainable, production-ready code I'd be happy to discuss your first assignment and demonstrate how I can contribute to your engineering team from day one. Regards, Muhammad Shoaib
$1,500 USD in 7 days
6.8
6.8

⭐⭐⭐⭐⭐ Experienced C# / .NET Engineer Ready to Build Your Solutions! ❇️ Hi My Friend, I hope you are doing well. I reviewed your project needs and see you're looking for a C# / .NET Engineer. You have no need to look any further as Zohaib is here to help you! My team has completed 50+ similar projects for C# and .NET applications. I will use my expertise to create efficient solutions tailored to your needs, ensuring top quality within your budget. ➡️ Why Me? I can easily handle your C# / .NET project as I have over 5 years of experience in software development. My skills include object-oriented programming, building RESTful APIs, and working with databases. Additionally, I have a strong grip on other relevant technologies, ensuring a smooth development process. ➡️ Let's have a quick chat to discuss your project in detail and let me show you some samples of my previous work. I look forward to discussing this with you in our chat. ➡️ Skills & Experience: ✅ C# Development ✅ .NET 6/7/8 ✅ ASP.NET Core ✅ RESTful APIs ✅ Entity Framework Core ✅ SQL Server ✅ PostgreSQL/MySQL ✅ Unit Testing (xUnit, NUnit) ✅ Git Version Control ✅ Asynchronous Programming ✅ Dependency Injection ✅ Middleware in ASP.NET Core Waiting for your response! Best Regards, Zohaib
$1,800 USD in 2 days
6.6
6.6

Hi, I have strong hands-on experience with C#, ASP.NET Core / .NET Framework, RESTful APIs, Entity Framework, Dapper-style data access, SQL Server, PostgreSQL/MySQL, dependency injection, middleware, async/await, and clean OOP/SOLID-based architecture. I’m comfortable working across: * ASP.NET Core Web API and MVC * .NET 6/7/8 and legacy .NET Framework * SQL schema design, stored procedures, query optimization * Unit testing with xUnit/NUnit/MSTest-style workflows * Git branches, pull requests, reviews, and documented commits * Debugging, refactoring, and integrating existing systems I’ve worked on production .NET platforms involving dashboards, APIs, authentication, payments, reporting, admin tools, and database-heavy business logic. My focus is maintainable code, clear communication, and reliable delivery.
$2,250 USD in 7 days
5.9
5.9

Hi Brian, Your requirements align well with my experience. I have over 10 years of experience building enterprise applications with C#, .NET 6/7/8, ASP.NET Core Web APIs, Entity Framework Core, SQL Server, REST APIs, dependency injection, async/await, unit testing, Git workflows, and Azure. I’ve also designed and maintained large multi-tenant SaaS platforms where performance optimization, code reviews, and clean architecture are part of my daily work. I believe I can add value to your team from day one. Let’s schedule a call to discuss the role, your current projects, and how my experience can best fit your requirements.
$1,500 USD in 3 days
6.1
6.1

I will develop your robust RESTful APIs using ASP.NET Core and Entity Framework, ensuring clean architecture and high-performance data operations for your application. I recently optimized complex SQL Server procedures to improve system latency by forty percent. I strictly adhere to SOLID principles and utilize xUnit for comprehensive test coverage, ensuring your backend is scalable and maintainable. Estimated timeline: 21 days Budget: $2,500 Let's discuss and get started. Ajharul
$2,250 USD in 7 days
5.8
5.8

EF Core's change tracker gets expensive fast on read-heavy work, so I reach for AsNoTracking() on query paths and drop to Dapper for the hot endpoints where projection and index-friendly SQL matter more than entity graph convenience. That split usually ends up being the actual architecture decision on a general backend role like this, not a detail to sort out later. Since the brief covers a range of modules rather than one fixed feature, I'd structure it so each milestone lands a working, tested increment you can review and merge rather than one big drop at the end. Feature branches and PRs per milestone, dependency injection kept clean from the start so testing doesn't turn into a fight with the container later, and middleware scoped tightly so cross-cutting concerns stay out of business logic. M1: project scaffolding, DI setup, EF Core context and first migration, base middleware pipeline - $510, 2 days M2: core API endpoints plus a Dapper layer for the read-heavy queries - $560, 3 days M3: business logic module with async patterns end to end and unit tests around core services - $520, 3 days M4: remaining endpoints and modules per agreed scope, plus integration tests - $500, 3 days M5: query optimization, indexing review, test coverage cleanup, and handover - $460, 3 days Total is 2550 over 14 days, structured so M1 is a small, low-risk confirmation before the rest funds. Do you already have a schema in place, or is table design part of what you want scoped into M1?
$2,550 USD in 14 days
5.5
5.5

Hi there, I’d be happy to discuss your project—feel free to start a chat anytime. I’m a full-stack developer with solid experience building scalable web and desktop applications, and I’m confident I can deliver your project efficiently and on time. I also have strong exposure to modern technologies including Web3 concepts, DevOps practices, and automation. I’m a Kubernetes enthusiast with hands-on experience using Docker containers and deploying applications on Linux servers. My expertise includes: MERN / MEAN Stack (development + team management) .NET Core APIs with Angular, including D3.js data visualizations Azure Logic Apps, SharePoint, and workflow automation (PowerApps familiarity) Salesforce development with Apex, Visualforce, and integrations via .NET APIs DevOps basics, containerization, and application hosting on Linux Automation workflows and AI-based tools to improve efficiency I bring a problem-solving mindset and full project lifecycle experience—from development to deployment. Looking forward to hearing from you. Thank you!
$3,000 USD in 7 days
5.0
5.0

Hi there! I'm Shujaat, an all-rounded and certified developer with years of experience in the software development industry. Your project calls for a C#/.NET developer familiar with various frameworks, databases, and capabilities within the .NET ecosystem. My proficiency spans all these areas and even extends to RESTful API building and Entity Framework Core usage. I fully embrace object-oriented programming (OOP) principles such as SOLID to create robust, scalable, and maintainable codebases. My expertise in database management using SQL Server, MySQL, or PostgreSQL gives me a holistic understanding of how the back-end integrates into the entire system. Moreover, I'm adept at harnessing asynchronous programming patterns to optimize performance. In addition to my technical skills, I also have valuable experience with collaborative workflows in distributed teams using Git. As a bonus, I hold a bachelor's degree in Computer Science and Engineering that enhances the practical knowledge I bring to every project. Caliber meets efficiency is what I stand for; let's make something outstanding together!
$2,250 USD in 7 days
4.6
4.6

With over 5 years of hands-on experience in C#/.NET development, your project is right in my wheelhouse. I'm MOHD SADAB, and my expertise includes a profound understanding of C#, .NET Core, and the framework which I've been using for enterprise-level application development throughout my career. This combined with the knack of building and consuming RESTful APIs, employing Entity Framework Core and extensive knowledge in relational databases including SQL Server make me confident that I can fulfill your requirements with utmost quality. Another aspect that we share in common is our love for clean code standards like SOLID principles and Agile methodologies. I believe that quality code is not only about functionality but also about maintainability and optimal performance. In this regard, I have mastered unit testing frameworks like xUnit for reliable results backed by solid tests. I am also well versed with Git version control that makes me proficient in collaborative workflows such as pull requests and code reviews.
$2,250 USD in 7 days
4.6
4.6

Hi, I'm an experienced C#/.NET developer with strong hands-on experience in ASP.NET Core, REST APIs, Entity Framework, SQL Server/PostgreSQL, async programming, dependency injection, and clean architecture. I write maintainable, well-tested code and am comfortable working in collaborative Git workflows with code reviews and CI/CD. I focus on building reliable backend services with clean API design, optimized database queries, and SOLID principles, ensuring the application remains easy to extend as requirements evolve. I'm available to start immediately and would be happy to become a long-term member of your development team.
$2,250 USD in 7 days
4.3
4.3

I'm a hands-on Senior Software Engineer with extensive experience designing, building, deploying, and supporting production software systems. I specialize in backend and full-stack development using Python, C#/.NET, Node.js, React, and Angular, with strong expertise in SaaS platforms, cloud-native applications, AI enabled solutions, and distributed systems. With .Net/C#, my experience is 8 years.
$2,250 USD in 30 days
4.4
4.4

I’ve spent the last five years building production-grade APIs on .NET 6/7/8 with EF Core, PostgreSQL, and ASP.NET Core Web API—so this fits tightly. I’ll scaffold a clean, SOLID-layered solution with DI middleware, then implement endpoints, repository pattern with EF Core or Dapper, and secure it behind JWT. Schema design and stored procedures will target PostgreSQL for query performance; unit tests will run on xUnit with Moq for mocking. CI/CD through Git with PR reviews, async/await for concurrency, and minimal downtime deployments via blue-green. Thanks, Andrii.
$2,250 USD in 30 days
4.0
4.0

Hi, Aashiq (Ash) here from Cape Town, South Africa. This project instantly caught my eye, so I had to reach out. I see you are looking for a mid-level C#/.NET developer with solid experience in .NET 6/7/8 and a strong grasp of object-oriented programming. Your focus on building and consuming RESTful APIs aligns perfectly with my background. I have over five years of experience helping businesses enhance their software solutions. My work includes developing high-performing applications using ASP.NET Core and Entity Framework. I’m confident I can deliver exactly what you need. Feel free to ask for samples of my successful projects. Based on what you mentioned, here is how we would approach the project: - Assess project requirements to ensure alignment. - Develop RESTful APIs with ASP.NET Core. - Implement OOP and SOLID principles effectively. - Optimize database queries for performance using SQL Server. You can count on clear communication throughout the project, ensuring a seamless and user-focused solution optimized for performance. Best Regards, Aashiq
$2,700 USD in 7 days
3.9
3.9

Fremont, United States
Member since Jul 30, 2026
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