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We are looking for a part-time developer (up to 20 hours per week) to help maintain and enhance our existing VIP Legacy application. This is an established production system built on the Microsoft .NET Framework stack, and we need someone comfortable working in a mature codebase rather than building from scratch. The application is built with C#, ASP.NET MVC, Entity Framework, and SQL Server, with a traditional layered architecture that includes domain models, repositories, and service logic. The system manages business entities such as permits, inspections, jurisdictions, contractors, inspectors, and reporting workflows. What we need help with: Maintaining and improving an existing ASP.NET MVC application Debugging and fixing issues in legacy C# code Working with Entity Framework models, repositories, and SQL-backed business logic Enhancing reporting, queueing, and administrative workflows Making safe, well-tested updates in an established production environment Collaborating on ongoing support and incremental improvements Required Skills: Strong C# experience Solid ASP.NET MVC background Strong experience with Entity Framework Good SQL Server / T-SQL skills Experience supporting and extending legacy enterprise web applications Ability to read existing code carefully and make reliable changes Nice to Have: Experience with .NET Framework 4.x applications Familiarity with repository/service-layer patterns Experience with reporting modules, admin dashboards, or workflow systems Front-end experience with Razor views, JavaScript, Bootstrap, or similar legacy UI stacks Engagement Details: Part-time: Up to 20 hours per week Rate: $30/hour Ongoing work for the right developer Preference for someone responsive, practical, and comfortable working in an existing codebase
ID do Projeto: 40325801
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Ativo há 16 dias
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131 freelancers estão ofertando em média $23 USD/hora for esse trabalho

A Warm Hello! We are readily available to start working on this project! Thank you for the detailed overview of your VIP Legacy application. This is exactly the kind of engagement we specialize in—supporting and evolving mature .NET systems with stability, care, and consistency. We are an experienced development agency with a dedicated Microsoft stack team that has spent years maintaining and extending legacy ASP.NET MVC applications in production environments. We understand the importance of making safe, well-tested changes without disrupting existing workflows. How We Can Support - Maintain and enhance your existing ASP.NET MVC application - Debug and resolve issues in legacy C# codebases - Work confidently with Entity Framework (DB-first / Code-first) and repository/service-layer patterns - Optimize and extend SQL Server / T-SQL logic - Improve reporting, queueing, and administrative workflows - Ensure stability through careful testing and incremental updates We’re confident we can provide the reliable, responsive support you need to keep your system running smoothly while incrementally improving it over time. Happy to get started with a small task or codebase walkthrough to align quickly. Best regards, Ana
$20 USD em 40 dias
9,7
9,7

Hi, This is Elias from Miami. I checked your project description and understand you’re looking for a part-time developer to help maintain and gradually improve an existing ASP.NET MVC application built on the .NET Framework with C#, Entity Framework, and SQL Server. The main goal seems to be safely supporting a mature production system—debugging issues, improving workflows, and extending reporting and admin features without disrupting the existing architecture. I’ve worked on established enterprise systems before where the focus was reading existing code carefully, stabilizing legacy logic, and delivering small, reliable improvements rather than large rewrites. My approach would be to first understand the current architecture and key workflows, review the repository/service layers and EF models, then work through issues and enhancements in controlled updates with proper testing so production stability is maintained. I have a few questions to get a better understanding: Q1 – Which areas of the system currently need the most attention: reporting modules, inspection workflows, or administrative tools? Q2 – Do you already have a staging environment and deployment process in place for testing updates before production? Q3 – Is the project expected to remain on .NET Framework 4.x long term, or are there future plans to migrate parts of the system to .NET Core or .NET 8? Looking forward to hearing from you.
$50 USD em 40 dias
8,0
8,0

I am an experienced C# and ASP.NET MVC developer with a solid background in maintaining and enhancing legacy systems. My expertise with the Microsoft .NET Framework stack and SQL Server ensures I can manage and improve your existing VIP Legacy application effectively. With substantial experience in legacy enterprise web applications, I am skilled at debugging, fixing issues, and making reliable changes in mature codebases. I have a strong command of Entity Framework, along with the ability to work with domain models, repositories, and service logic. My history includes enhancing reporting, queueing, and administrative workflows, ensuring safe and well-tested updates. I am familiar with the repository/service-layer patterns and have experience with Razor views, JavaScript, and Bootstrap, which aligns with your nice-to-have criteria. I am interested in discussing how I can contribute to your project while maintaining high reliability. Could you share more about your system's current pain points? I look forward to collaborating on ongoing support and improvements. Best regards.
$20 USD em 40 dias
8,2
8,2

I am an expert in handling legacy .net systems and have an experience of over 18 years, and have handled many .net applications which were already in production maintaining them, making changes and providing support. I have good experience on .net 4.x, have used repository and service layer patterns in most of my apps, have good grasp on tsql and entity framework and can handle any task. I am available for 20-25 hours weekly. Lets schedule a call and discuss further
$20 USD em 40 dias
8,2
8,2

YES----I got the decsription -------------I am highly appreciative to work on this specific task to Maintain Legacy VIP Platform I can do my best. I am an INNOVATIVE ASP.NET /MVC /Full stack developer having rich experience with so many successful Tasks. Let’s connect on chat for further discussion and start quickly. Thanks!!
$16 USD em 40 dias
7,5
7,5

⭐⭐⭐⭐⭐ Enhance Your VIP Legacy Application with a Part-Time Developer ❇️ Hi My Friend, I hope you are doing well. I just reviewed your project requirements and see you're looking for a part-time developer for your VIP Legacy application. You don’t need to look any further, as Zohaib is here to help you! My team has successfully completed over 50 similar projects for legacy applications. I will maintain and improve your ASP.NET MVC application by debugging legacy C# code and enhancing workflows, all while ensuring safe and well-tested updates. ➡️ Why Me? I can easily help you maintain and enhance your existing application as I have 5 years of experience in C#, ASP.NET MVC, and Entity Framework. My skills include debugging, SQL Server management, and working with legacy systems. I also have a strong grip on collaborating for ongoing support and improvements. ➡️ Let's have a quick chat to discuss your project in detail. I can provide samples of my previous work, showcasing my experience with legacy applications. Looking forward to our chat! ➡️ Skills & Experience: ✅ C# Development ✅ ASP.NET MVC ✅ Entity Framework ✅ SQL Server ✅ T-SQL ✅ Debugging ✅ Legacy System Support ✅ Reporting Enhancements ✅ Workflow Improvements ✅ Safe Code Updates ✅ Collaboration ✅ Front-End Basics Waiting for your response! Best Regards, Zohaib
$17 USD em 40 dias
7,7
7,7

Hi, this is the kind of role I handle well because it is not about rebuilding a product from scratch - it is about stepping into a mature .NET application, understanding the existing logic carefully, and making safe, reliable improvements in production. Your needs are very clear: maintain and extend an established ASP.NET MVC / C# / Entity Framework / SQL Server system, debug legacy issues, improve reporting and workflow areas, and support the application without introducing risk. That kind of work fits me well because I’m comfortable reading existing code deeply, tracing business logic through repositories and service layers, and making practical updates that are stable and well tested. What gives me confidence here is my experience working on structured business platforms where admin workflows, reporting, data integrity, and ongoing support all matter more than flashy rewrites. I understand the discipline needed in mature systems: careful debugging, safe SQL-backed changes, clear communication, and incremental improvements that respect the current architecture. I’m also comfortable working part-time in an ongoing support model, collaborating consistently, and helping move the system forward step by step. If you want a developer who is practical, responsive, and comfortable working inside an existing .NET codebase, I’d be glad to discuss the next step. Best regards, Diah
$30 USD em 40 dias
7,5
7,5

Hi — maintaining a legacy ASP.NET MVC system with Entity Framework and SQL Server without breaking production workflows is exactly where most risks hide, especially around data integrity, reporting, and layered service logic. I’ve worked extensively in mature, layered .NET and mixed frontend/backend systems where safe, incremental changes are critical. My approach is to first map your domain models, repository patterns, and service boundaries, then isolate high-risk areas (reporting, queueing, and business workflows) before making changes with full backward compatibility. I emphasize defensive coding, EF query optimization, and SQL-level validation to keep performance stable. I also introduce structured logging and lightweight observability to reduce debugging cycles. One improvement I’d suggest is adding integration-level tests around critical workflows to prevent regressions in a legacy environment. I’ve maintained and extended enterprise systems using C#, ASP.NET, SQL Server, and EF where stability and performance were essential, delivering safer releases and faster issue resolution cycles. Q1: How are deployments and rollbacks currently handled, and do you have a staging environment? Q2: Which modules (reporting, queues, inspections) are most performance-sensitive or error-prone today? Q3: Are there known issues with EF performance (e.g., N+1 queries, heavy joins) or slow SQL queries?
$20 USD em 40 dias
7,0
7,0

Hi I’m a strong fit for this role because I’m comfortable working inside mature .NET Framework applications and making safe, targeted improvements without disrupting existing production behavior. The main technical challenge in legacy ASP.NET MVC systems is understanding the current domain, repository, and service-layer flow well enough to fix issues without creating regressions. I can help with debugging legacy C# code, improving Entity Framework queries and models, reviewing SQL Server logic, and tightening workflows around permits, inspections, reporting, and admin operations. My background includes C#, ASP.NET MVC, Entity Framework, SQL Server, layered enterprise applications, and careful maintenance work in established codebases. I focus on reading the existing architecture first, tracing real data flow, and then applying well-tested changes that respect current business rules and operational dependencies. I’m also comfortable with Razor views, JavaScript, Bootstrap-style legacy UI layers, and the practical realities of ongoing support work in production environments. This is the kind of long-term maintenance and enhancement work I enjoy because it requires discipline, reliability, and strong judgment rather than guesswork. Thanks, Hercules
$50 USD em 40 dias
6,9
6,9

Hello, Can we discuss about your VIP Legacy app maintenance project cause I have worked on improving stable systems with careful fixes and safe releases using ASP.NET MVC and Entity Framework. I focus on clean debugging, small safe changes, better queries, and keeping production stable while improving workflows. Do you have test coverage or should I add basic tests first? How are deployments handled now? Any slow reports or queries already known? One thing—legacy apps often hide hidden dependencies that break with quick fixes. Best regards, Devendra S.
$30 USD em 40 dias
6,3
6,3

I am an experienced C# and ASP.NET MVC developer with a solid background in maintaining and enhancing legacy systems. My expertise with the Microsoft .NET Framework stack and SQL Server ensures I can manage and improve your existing VIP Legacy application effectively. With substantial experience in legacy enterprise web applications, I am skilled at debugging, fixing issues, and making reliable changes in mature codebases. I have a strong command of Entity Framework, along with the ability to work with domain models, repositories, and service logic. My history includes enhancing reporting, queueing, and administrative workflows, ensuring safe and well-tested updates. I am familiar with the repository/service-layer patterns and have experience with Razor views, JavaScript, and Bootstrap, which aligns with your nice-to-have criteria. I am interested in discussing how I can contribute to your project while maintaining high reliability. Could you share more about your system's current pain points? I look forward to collaborating on ongoing support and improvements. I am available till 20 hours per week dedicated fully. Let's have short conversion and discuss! Girish R.
$20 USD em 40 dias
6,4
6,4

Hello, As an experienced Full Stack Developer, I'm skilled in a range of technologies that align perfectly with your project needs. My solid C#, ASP.NET MVC, Entity Framework, and SQL Server abilities will allow me to comfortably work within your mature codebase, ensuring smooth maintenance and improvements to your existing systems. I have a comprehensive understanding of domain models, repositories and service logic which are vital for your layered architecture. Plus, my history of working with business entities such as permits, inspections, jurisdictions and more is incredibly relevant to your project. Not only can I effectively debug and fix issues in legacy C# code, but I also bring a high level of expertise in enhancing reporting, queueing, and administrative workflows. My automation skills are ideal for supporting the ongoing development and incremental improvements required for your system. Moreover, my business-focused approach means that any updates will be reliably tested before being implemented into the established production system. My hourly rate of $30 offers exceptional value for the quality and experience I bring to this project. Recognizing that this collaboration requires responsiveness, practicality and comfort working within an existing codebase; all three form part of my core work ethic. Let's team up to continue delivering impactful support to your VIP Legacy Platform while ensuring it remains efficient in today’s evolving landscape.
$18 USD em 40 dias
6,2
6,2

Hello Sir, How about a demo of how I can enhance your existing VIP Legacy application without any commitment? I specialize in navigating complex legacy systems, ensuring reliable and effective improvements in your ASP.NET MVC application. Let's connect to discuss how I can support your ongoing development needs. Best, Smith
$20 USD em 40 dias
6,2
6,2

HELLO, I HAVE REVIEWED YOUR REQUIREMENT FOR PART-TIME C# / ASP.NET MVC MAINTENANCE OF THE LEGACY VIP PLATFORM. **** You can track the project’s progress using the tracker. I’m available to work 40 hours per week **** With 10+ years of experience in C#, ASP.NET MVC, Entity Framework, and SQL Server, I am highly comfortable working within mature enterprise codebases and can provide safe, well-tested updates and incremental enhancements. PROPOSED APPROACH → • Analyze the existing architecture (domain models, repositories, service layers) • Debug and resolve issues in legacy C# code • Maintain and enhance reporting, queueing, and admin workflows • Ensure database consistency and optimal SQL queries • Collaborate on ongoing support, improvements, and feature requests • Follow best practices to maintain stability in the production environment INCLUDED SERVICES: ✔ 2 YEARS FREE ONGOING SUPPORT ✔ COMPLETE SOURCE CODE HANDOVER ✔ AGILE METHODOLOGY, WITH ASSISTANCE FROM ZERO TO LIVE UPDATES I am ready to start immediately, work up to 20 hours per week, and ensure your platform remains stable while evolving efficiently. I eagerly await your positive response. Thanks
$25 USD em 40 dias
6,3
6,3

Hi, I’ve spent 14+ years in C# and ASP.NET MVC, helping businesses keep their legacy systems running smoothly while adding real value. Here’s what I bring: ✅ Expert in C#, ASP.NET MVC & Entity Framework—real production experience, not just tutorials ✅ Strong SQL Server / T-SQL skills for debugging, optimization & data-driven logic ✅ Proven track record maintaining and improving legacy enterprise systems ✅ Comfortable with layered architectures, workflows, and reporting modules ✅ Detail-oriented, careful, and reliable—your production system stays safe If you want someone who can jump into your existing VIP platform, fix issues fast, and make smart, safe improvements, I’m your guy. Let’s have a 15-min call to see if we’re a fit. Best, Manoj
$20 USD em 40 dias
5,9
5,9

Hi there To maintain and improve a legacy ASP.NET MVC platform, the most critical part is understanding the existing architecture before making changes—especially in systems handling permits, inspections, and reporting workflows. I’ll approach this by first reviewing the domain models, repository/service layers, and database interactions, then making targeted, well-tested updates to fix issues, improve performance, and enhance workflows without introducing regressions. This ensures stability while still moving the system forward. This means I understand your goal is reliable, incremental improvement—not risky rewrites. My process is simple: analyze existing code paths and dependencies, implement focused fixes and enhancements, then validate changes through testing and real workflow scenarios before deployment. I’m available up to 20 hours/week and can start with a focused onboarding pass to quickly become effective within your codebase..
$50 USD em 40 dias
5,4
5,4

I’m interested in helping you maintain and enhance the VIP Legacy platform. I have a solid background in the .NET Framework stack, specifically C#, ASP.NET MVC, and Entity Framework. I am particularly comfortable working within established, layered architectures that use repository and service patterns, as I understand the care required when updating production business logic. Handling complex SQL-backed workflows and reporting modules is right in my wheelhouse. I am available for the requested 20 hours per week at $30/hour and can start making reliable contributions to your codebase immediately. I’d welcome the chance to discuss the current priorities for your administrative and inspection workflows. Are you available for a brief call?
$30 USD em 20 dias
5,0
5,0

https://www.freelancer.com/projects/api-developmet/ASP-NET-Web-Control-for/reviews https://www.freelancer.com/projects/php/Twitch-Integration-Module-for-DotNetNuke/reviews As a seasoned developer, well-versed in your required technologies, I am a prime candidate for your part-time maintenance role. My extensive experience with C#, ASP.NET MVC, Entity Framework, and SQL Server positions me well to understand your VIP Legacy application and provide efficient solutions to your system's management needs. I have previously worked on legacy enterprise web applications like yours and maintained them effectively while integrating vital updates. I understand the value of incremental improvements in mature codebases, therefore can guarantee disciplined collaboration on ongoing support and the utilization of my skills in making meaningful enhancements. Punctuality, pragmatism and adaptability are three virtues in my freelance style that will undoubtedly prove valuable in creating a productive partnership with you. Let's get started!
$15 USD em 40 dias
4,6
4,6

With my comprehensive experience in C#, ASP.NET MVC, Entity Framework, SQL Server, and Legacy Enterprise Web Applications, I am well-equipped to handle the challenges your VIP Legacy platform presents. My fluency in repository/service-layer patterns and familiarity with reporting modules, admin dashboards, and workflow systems make me the ideal candidate for enhancing your system's reporting, queueing, and administrative workflows. Moreover, having worked extensively on fixing bugs, adding new features to existing apps and ongoing maintenance, you can rely on my ability to read existing code carefully and produce reliable changes without sacrificing productivity. Building on my solid grounding of the Microsoft .NET Framework stack, I'm also adept at troubleshooting in efficient ways that minimize disruption while ensuring sturdy solutions. Last but not least, I offer you a multicultural perspective as an Australian-based engineer offering my skills internationally. My transparency and clear communication will keep you updated throughout every phase of our collaboration. Let's connect and leverage my skillset to strategically evolve this essential system ensuring your operations run seamlessly now and into the future including providing more streamlined service to jurisdictions, contractors, inspectors, and seamless reporting workflow. Hire me today so we can start transforming your codebase into a highly-efficient masterpiece!
$25 USD em 40 dias
5,8
5,8

Hello, I’m very interested in supporting and enhancing your VIP Legacy application. I have 2+ years of hands-on experience with C#, ASP.NET MVC, Entity Framework, and SQL Server, and I’m comfortable working within mature, production-level codebases where stability and careful updates are critical. I have experience reading and understanding existing architectures, including repository and service-layer patterns, and making safe, well-tested improvements without breaking existing functionality. I can assist with debugging legacy C# issues, optimizing EF queries, improving reporting workflows, and enhancing admin and queue-based processes. I pay close attention to code quality, follow structured debugging practices, and ensure every update is reliable and maintainable. I’m also familiar with Razor views, JavaScript, and Bootstrap, so handling UI adjustments in legacy stacks is not a problem. I’m available for up to 20 hours per week, responsive in communication, and focused on long-term collaboration. Looking forward to contributing to your system’s stability and growth. Best regards, Muhammad Arshaq
$15 USD em 30 dias
4,9
4,9

Riverview, United States
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