Full-Stack Developer for Angular Web Application

@Microlent

Hello, I am Dr. Rajesh Rolen, PhD in Computer Science & Engineering, with experience of over 20+ years in AngularJS, PHP, Angular, REST API, SQL, .NET, Bootstrap, C# Programming, Full Stack Development, HTML As a preferred freelancer in the top 1%, I have done 400+ projects here on freelancer.com, I have 4.9 ratings out of 5 on average, which showcases my quality of work and timely delivery. Key Highlights: - Free Hosting Support on the Cloud or any desired platform. - Free 3 months of post-delivery support to ensure that our client doesn’t face any challenges after the launch of the project. - Free Dedicated tester on projects to ensure quality delivery, so clients don’t need to act as a tester. - 10+ Years experience UI/UX team to ensure intuitive UI. Portfolio: https://www.freelancer.com/u/Microlent Please open the chat and send me a message, so we can have a more detailed discussion about the project to give you the project timeline and cost. Thank you for considering my services. I look forward to engaging in a productive conversation and understanding how I can be of assistance in bringing your project to life. Regards Rajesh Rolen

@rajat07me

Migrating legacy desktop functionality into a modern web app usually gets messy where business logic, database behavior, and frontend expectations no longer match, so the key is to understand the existing flow before rewriting pieces in isolation. I’d approach this by first tracing the current modules, API touchpoints, and SQL dependencies so new features and fixes don’t create regressions elsewhere. My background fits this kind of ongoing product work well: ASP.NET Core/C#, REST APIs, SQL Server, and modern frontend stacks for feature development, bug resolution, and performance cleanup inside existing systems. I’m comfortable working with PMs and QA, picking up an established codebase quickly, and shipping maintainable changes rather than short-term patches. A small plus from my side is that I’m happy to help identify refactor opportunities while fixing active issues. - Is the current frontend fully Angular, or is it mixed with React/older UI pieces? - How much of the legacy desktop logic is already documented versus needing reverse engineering? - Will the first tasks be feature delivery, bug fixing, or migration-focused?

@irsolutions

With over a decade of experience in full-stack architecture and high-scale systems, I understand the critical need for an experienced Full-Stack Developer like yourself in migrating functionality to a modern web application. I have a proven track record in working with legacy systems and scaling for over 1 million users, making me well-equipped to tackle the challenges your project presents. My strategic insight for ensuring project scalability is to focus on modular and reusable code structures, allowing for easier maintenance and future enhancements. One past success that speaks to my abilities is successfully building and scaling Telegram Mini Apps, demonstrating my capability to handle high-complexity systems efficiently. I encourage you to reach out so we can discuss your project roadmap in more detail. Let's work together to bring your vision to life and ensure the success of your Angular web application.

@technosystem

With over 5 years of professional experience in Full Stack development, I can assure you that choosing me for this job will be the right decision. My expertise lies not only in C#, HTML, PHP, and SQL but also in developing user-friendly applications and consuming REST APIs - skills that perfectly align with your requirements. My adeptness in using modern frontend frameworks like Angular, React will ensure aesthetic, efficient and scalable frontend interfaces for your web application. Investigating and fixing bugs across the full application stack is an area I specialize in. With this project requiring migration from a legacy desktop system to the web, my proficiency in understanding an existing codebase and working independently comes especially handy. I assure you, transitioning your legacy functionalities into modern web-based solutions will be accomplished with the utmost precision. Lastly, I believe in long-term collaborations and building strong relationships with my clients by delivering clean, maintainable, and well-structured code. The trust and satisfaction of my clients are of paramount importance to me and I always strive to go above and beyond to achieve it. I look forward to bringing these qualities and skills to your team for continuous improvement on your amazing web application project!

@installerpoint

Hello, I’m interested in contributing to your ongoing Angular web application work, including feature development, REST API integration, debugging, responsive interfaces, and legacy desktop migration. The role’s combination of frontend, backend, and SQL Server responsibilities is well aligned with practical full-stack development. I can work comfortably within an existing codebase, collaborate with project management and QA, and keep changes maintainable and secure. One useful improvement would be establishing automated API and regression tests around migrated legacy functionality to reduce risk while new features are introduced. Check our portfolio, https://www.freelancer.com/u/installerpoint Best Regards, Muhammad Adeel

@shaktistanwar

Hi, I’m an experienced Full Stack Developer with strong hands-on expertise in C#, .NET/ASP.NET Core, React, REST APIs and SQL Server, and I’d be a strong fit for your ongoing development team. I can help with: • Building and maintaining full-stack web applications • Designing and integrating REST APIs and backend services • React-based responsive UI development • SQL Server queries, stored procedures and data relationships • Debugging issues across frontend, API and database layers • Migrating legacy desktop functionality into modern web applications • Authentication, authorization, security and performance improvements • Git-based development, code reviews and clean maintainable code My experience includes ASP.NET Core APIs, React/TypeScript, SQL Server, Azure services, background workers, authentication, database integration and scalable application architecture. I’m comfortable joining existing codebases, understanding legacy workflows and independently converting them into reliable web functionality. I work closely with PM and QA teams, follow clean coding practices, and focus on delivering tested, production-ready features rather than just writing code. I’m available for an ongoing engagement and can start quickly. Best regards, Shakti Singh

@ranjika08

The real challenge here is not just building features, but safely extending an existing application while legacy desktop behavior is being moved to the web. That usually means understanding old workflows, database rules, and edge cases first, then implementing changes in a way that keeps the app stable and testable. I’ve worked on full-stack application maintenance and enhancement involving .NET/ASP.NET Core, REST API integration, SQL Server queries and procedures, and modern JS frameworks in team environments. This kind of role suits me because it needs someone who can debug across layers, read existing code without hand-holding, and collaborate cleanly with PM and QA. I can also help flag performance or security weak points as I move through the codebase. - Is Angular your primary frontend today, and which version are you on? - Are stored procedures heavily used in the current SQL Server layer? - Do you already have a defined backlog for the first few weeks, or would you want help prioritizing the migration items?

@mikelilei82

Hi there, I can help with this because I’m comfortable stepping into existing codebases, building API-driven features, and fixing issues across frontend, backend, and database layers. Your need is not just new Angular work, but steady product development while gradually moving useful legacy desktop functionality into a cleaner web experience. I’d keep the approach practical: understand the current structure first, make safe incremental changes, keep REST contracts clear, and stay close to SQL Server behavior so features remain stable. I also value maintainable code, clear communication with PM/QA, and careful debugging when problems cross layers. If helpful, I’d be glad to discuss the current stack and where I can add value first.

@raheel2k29

Hi, I’m interested in joining your team as an ongoing Full-Stack Developer. This is exactly the type of role where I can contribute beyond simply implementing tickets—I can work across the frontend, backend, API, and database layers and help modernize legacy functionality as the application evolves. I’m comfortable joining an existing codebase, understanding how the current system works, and making changes without introducing unnecessary refactoring or breaking existing functionality. For legacy migration work, I focus on understanding the original business logic first and then translating it into a clean, maintainable web implementation rather than simply reproducing the old interface. I’m also comfortable working independently while keeping the project manager and QA team updated throughout development. I’m available to start ASAP and would be interested in a long-term engagement with increasing hours as the workload grows. I’d be happy to review the current application/codebase and discuss the first set of features or migration tasks. Best regards Raheel

@shrec

Hi there, I can help with the ongoing development of your Angular-based web application, including new features, bug fixing, REST API integration, SQL Server work, and gradually moving functionality from the legacy desktop system into a maintainable web architecture. I’d be comfortable working across the frontend and backend, tracing issues through the full stack, understanding existing code, and keeping authentication, authorization, performance, and security in mind as features are migrated. I’d also work closely with your project manager and QA team through code reviews, testing, and iterative releases. For the legacy migration, I’d first understand the existing behavior and data relationships, then reproduce the required functionality in the web application without carrying unnecessary legacy complexity forward. I’m available for an ongoing remote engagement and can start with the initial part-time workload. Best, Ivane

@khurshid040462

Hello, I’m interested in supporting your ongoing Angular full-stack application development. I can contribute across responsive frontend features, C#/.NET and ASP.NET Core services, REST API integration, SQL Server queries and stored procedures, debugging, authentication, and legacy desktop-to-web modernization. I’m comfortable working within existing codebases alongside project managers and QA teams, with a focus on maintainable, secure, and reliable delivery. A valuable improvement would be establishing shared API contracts and automated regression coverage during the migration, reducing integration issues and protecting legacy functionality as new web features are introduced. I look forward to contributing to your long-term development roadmap. Regards

@ozbas

With over a decade of professional experience as a Full-Stack Developer, I believe my skill set aligns perfectly with your requirement. My forte lies in creating clean, efficient, reliable and user-friendly web applications, particularly with **Angular, React and other modern frameworks**. Having worked on many projects incorporating REST APIs and SQL databases like **SQL Server**, I understand the complexities involved in such integrations, frontend-backend architecture, authentication and authorization. Apart from languages such as **C#, .NET, and ASP.NET Core**, I'm comfortable with various development environments including **front-end/backend frameworks, Git for version-control**, etc which are vital to produce top-notch results in your migrating legacy project. My adaptability with different tools also extends to third-party integrations such as PayPal, Google Maps, Google Cloud Apis to name a few; that could prove useful when implementing new features or improving existing functionality for your web application. Furthermore, I emphasize effective communication and strong collaborations while also being independent when required. I offer my services at the rate of $25-50/hour which is negotiable in congruence with my extensive 10 years' of experience. As a long-term freelancer option available immediately, I pledge dedication to our partnership for mutual success. Let’s discuss your project in detail!

@corpmember29

HELLO, I CAN HELP YOU MODERNIZE YOUR LEGACY DESKTOP FUNCTIONALITY INTO A RELIABLE, SCALABLE ANGULAR + .NET WEB APPLICATION. >>>> Multi languages (English and Arabic)Left-To-Right (LTR) and Right-To-Left (RTL) <<<< I have carefully reviewed your requirements and understand that you need a long-term full-stack developer who can work independently across the frontend, backend and SQL layer—not just build isolated features. >>> 40-45 hours weekly I am available for work<<<< >>> you will track all progress of the project thru the tracker <<< I have 11+ years of full-stack development experience with strong expertise in C#, .NET/ASP.NET Core, Angular, REST APIs and SQL Server. I’m comfortable working with existing codebases, understanding legacy business logic, fixing cross-layer issues and gradually migrating functionality to modern web architecture. I can develop responsive Angular interfaces, build and integrate REST APIs, optimize SQL queries/stored procedures, implement authentication and authorization, troubleshoot production issues and improve application performance, security and reliability. I’ll follow clean coding practices, Git-based workflows, code reviews and structured testing while collaborating closely with your PM and QA team. I CAN REVIEW YOUR EXISTING ARCHITECTURE/CODEBASE AND QUICKLY IDENTIFY THE FIRST PRIORITY FEATURES OR MIGRATION AREAS. Thanks, Christina

@Joya1996

When a team needs ongoing help on a web app plus legacy migration, the biggest risk is introducing fixes that solve one issue but break another part of the stack. The safest way to handle that is with careful codebase onboarding, understanding data relationships and existing business rules, and then delivering changes that are clean enough for long-term maintenance. This matches the kind of work I handle best: C#/.NET backend work, API development and integration, SQL Server-heavy applications, and frontend updates in modern frameworks. I’m used to stepping into active products, investigating bugs across frontend/backend/database layers, and working alongside QA to get features properly validated before release. If useful, I can also help document old-to-new functionality as migration work progresses. - Is the backend already on ASP.NET Core, or are some services still on older .NET architecture? - Do you have test/staging environments in place for QA and deployment? - Roughly how many weekly hours are you expecting at the start?

@elishadiah326

Hi there, Thank you for posting the good task! You asked for the must-haves first. I have 5+ years of full-stack work, strong React and modern frontend experience, solid REST API design and consumption, Git fluency, and practical hands-on work with C# / ASP.NET Core and SQL Server including queries, relationships and debugging across existing codebases. Auth, authorization and application security are part of how I normally ship features. Pure Angular is not my deepest lane, but I have used it on real projects and pick up component patterns quickly when the codebase is already there. What matters most here is steady delivery on an existing product. New features, bug fixes, performance and security improvements, and careful migration from a legacy desktop system into a clean web flow, while working with your PM and QA. I am used to reading unfamiliar code, working independently, and writing maintainable changes rather than rewriting everything. I am available remotely for part-time ongoing work starting ASAP, and my rate sits comfortably inside your 25-35 USD per hour range. Looking forward to working with you for the long term. Sincerely, Diah

@AnumFatima210

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum

@webcast

Hi — Nitish here from Webcast Tech. I’ve read your brief and understand you need a full-stack developer to build features, fix bugs, and migrate legacy desktop functionality to a modern web app using C#/.NET, React/Angular, and SQL Server. I focus on clean integration across frontend, backend, and database while maintaining code quality and security. In past projects, I’ve delivered reliable, well-tested full-stack solutions on tight timelines with minimal rework. Quick question — what does the legacy desktop system currently use for data storage and business logic? Looking forward to hearing from you. Webcast Technology

@denisSolution

Hi, I'm Denis, a full-stack developer with experience building and maintaining production web applications. I've worked extensively with C# and ASP.NET Core on the backend, Angular on the frontend, and SQL Server for data management. I'm comfortable with existing codebases and modernizing legacy systems. Your project involves migrating functionality from a desktop system to a modern web application—requiring APIs that bridge old and new systems, understanding existing business logic, and translating it into clean web-based architecture. You need someone who can move quickly through features, debug across the stack, and maintain code quality independently. I've done similar work: inheriting complex applications, debugging frontend and backend issues, and migrating legacy functionality into modern frameworks. I'm comfortable with REST APIs, SQL Server queries and stored procedures, and the full development cycle from design through deployment. My approach: I'll start by understanding your architecture and codebase, then establish a workflow where I tackle features and bugs independently while staying aligned with your team. I'll prioritize maintainable code from the start—essential on ongoing projects with multiple developers. Early on, I'd clarify how the legacy system works and what migration priorities exist. This helps me understand which features to tackle first and what technical debt to address during modernization. I'm ready to start immediately. Let's discuss the

@flapjakc

Hi, Mateo here, from Toronto, to help you build this out. Migrating legacy desktop functionality to the web usually breaks down when business logic embedded in the old system gets rebuilt as a literal copy instead of a clean REST-backed service, so I'd want to understand which pieces of the legacy app are actual business rules versus UI convention before writing new endpoints. I'm comfortable working in C#/.NET Core with SQL Server on the backend and Angular or React on the front, fitting into an existing codebase and QA workflow rather than starting from scratch, and I take authentication/authorization seriously given it's part of the migration scope. Is there a specific piece of the legacy system you'd want tackled first, or would I be picking up existing tickets/backlog items from your current team?