C# USPS API Shipping Module

@vano101

Hello I have over 15 years of experience with C# and .NET and I have completed hundreds of relatively small C# projects like your one. Also, I worked with USPS API at once. Despite it's rather were old version of API I have capability to figure out with new API and I believe knowledge of old API rather helps. Meantime I worked with many projects with Web based API like this one. About .NET 4.8 - I understand it and it's not a problem at all About amount - I never change price, excepting cases where added new tasks outside original scope.

@seefattechnologi

Hello, ---->>I am highly qualified to do this job with high QUALITY -----C# USPS API Shipping Module I am Passionate .NET/Full stack developer having rich experience with so many successful Tasks. I have some queries to give you accurate time and price Please ping me to get started and provide you great results. Thanks

@ykarora26

Hello, I am an expert with 15+ years of experience in the technical world, delivering simple to complex websites, e-commerce platforms, membership systems, and portal websites. I provide clear communication, continued support after delivery, and 100% client satisfaction. I specialize in .NET and C# development, creating secure, scalable, and high-performance applications including enterprise solutions, APIs, and database-driven systems. I always adopt the latest technologies to ensure modern and future-ready solutions. If you are looking for a dedicated .NET expert who delivers quality, reliability, and timely results, I’d be glad to work on your project. Best regards, Yogesh

@dfordesigners

Hi Christopher K H. I’ve carefully read your project details "C# USPS API Shipping Module" and I’m confident I can deliver exactly what you’re looking for. With 5+ years of experience, 400+ 5★ reviews, and 500+ completed projects, I specialize in building high-performing websites, Shopify/WordPress solutions, and SEO-optimized platforms that drive real results. ★ Why Clients Choose Me Proven Track Record → 400+ reviews, 500+ projects Web Expertise → WordPress, Shopify, wix, Laravel, React, Vue.js, PHP, Python and more E-commerce & SEO → Store setup, payments, on-page SEO, performance boost UI/UX Design → Modern, responsive, conversion-focused On-Time & On-Budget → 96% timely, 97% within cost Reliable Support → Free 1-month help + long-term maintenance Secure Solutions → Backups, security & optimization Risk-Free Guarantee → No upfront payment. Pay only when satisfied, with full money-back assurance. If you want a professional developer who delivers on time, on budget, and stress-free, let’s connect. I’ll turn your vision into a secure, rapid, and growth-focused digital experience. Best regards, Kausar Parveen

@SBITServices

Hi, I have extensive experience in C# development and integrating APIs into existing modules. I understand the importance of updating the USPS API in your C# module before the current one gets deprecated. I will seamlessly integrate the new API into your existing module while ensuring compatibility with .NET 4.8. Let's discuss the specifics further to ensure a smooth transition. Please start the chat so we can discuss the project requirements in more detail. Regards, Sai Bhaskar

@purplemaestro

Hello! I'm an experienced C# developer with proven expertise in integrating shipping APIs, including USPS. I can seamlessly update your existing module to work with the new API while maintaining all current functionality and addressing any existing issues. My approach includes thor

@toriquldev123

Hello Dear! I write to introduce myself. I'm Engineer Toriqul Islam. I was born and grew up in Bangladesh. I speak and write in English like native people. I am a B.S.C. Engineer of Computer Science & Engineering. I completed my graduation from Rajshahi University of Engineering & Technology ( RUET). I love to work on Web Design & Development project. Web Design & development: I am a full-stack web developer with more than 10 years of experience. My design Approach is Always Modern and simple, which attracts people towards it. I have built websites for a wide variety of industries. I have worked with a lot of companies and built astonishing websites. All Clients have good reviews about me. Client Satisfaction is my first Priority. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication You are cordially welcome to discuss your project. Thank You! Best Regards, Toriqul Islam

@leenadvnani6

⭕ I’ve read your details carefully, and I don’t want to waste your time with long, boring proposals. Hi there, I’d love to work on your C# USPS API Shipping Module project. I have real experience in C# development and API integration, making this project a perfect fit for me. I am confident in implementing the new API into your existing module while ensuring it stays compatible with 4.8 .NET. I always prioritize clear communication and timely updates to deliver high-quality results. I put my heart into my work, ensuring your satisfaction with the final product. Let's discuss your vision further in a chat to ensure I can meet your expectations. Best regards, Leena Kumari.

@malkesh3m

⭐ Hello there, Availability: Immediate. I read your requirement for a C# USPS API Shipping Module update. Why I’m a good fit: Strong experience with C# .NET Framework 4.8, legacy code updates & API integrations Familiar with USPS shipping APIs, request/response mapping, and module refactoring Clean, minimal-impact updates while preserving existing logic and structure What I’ll deliver: Replace deprecated USPS API calls with the new API endpoint Update request/response models to match new specifications Ensure full compatibility with .NET Framework 4.8 Test the module end-to-end to confirm correct rate retrieval & functionality Clean, documented code with no breaking changes If this aligns with your requirement, feel free to message me — ready to implement immediately. Thanks!

@jackson325

Hello, I understand your requirement to implement the new USPS API into your existing C# module while maintaining compatibility with .NET Framework 4.8. This is a crucial update, especially given the impending deprecation of the current API, and I'm here to help ensure a smooth transition. In my previous projects, I successfully integrated various APIs into existing software systems. One notable achievement was upgrading a shipping module that faced similar challenges, resulting in improved functionality and reliability. ✅My Plan: - Review the existing C# module to ensure a thorough understanding. - Implement the new USPS API seamlessly within the current framework. - Conduct rigorous testing to validate the integration and ensure all functionalities operate as expected. - Provide documentation for future reference and training. What specific functionalities do you need most from the new API, and do you have a preferred timeline for this implementation? Best regards, Hongqiang Chen

@ska234

Hello I am a C# developer. I have rich experience in C#, .NET, ASP.NET, .NET Core, MSSQL, Restful API, API integration and so on. I am sure I can give you perfect result on this USPS API Shipping module update project. Looking forward to your reply Regards.

@liamch3D

With an extensive experience of over a decade in Full Stack Development, I bring to the table the skills and knowledge required to successfully implement the new USPS API into your existing C# module. My expertise in .NET and PHP perfectly aligns with your project's needs. I have a proven history of developing robust web applications, integrating APIs flawlessly, building REST APIs, and creating mobile applications - capabilities exactly demanded by your project. My work is driven towards delivering "highly effective and robust solutions", which I guarantee will be reflected in my delivery for your USPS API implementation. Throughout my journey as a Developer, I've not only built scalable software solutions but also provided ongoing technical support to my clients. This is the kind of dedication and long-term vision that I promise to bring to our partnership if chosen. Moreover, reliability is one of my core principles. By choosing me, you gain assurance of timely resolutions of any issues that might arise. Additionally, my willingness to provide warranty on all implemented solutions will give you a peace of mind post-completion. Let me assure you again - when it comes to solving problems RIGHT, being professional and prioritizing quality, you can trust me 100%. Let's partner for technology that not just bridges gaps but propels businesses forward!

@Alanfox10000

I’ll update your C# .NET 4.8 USPS module to use the new API—no scope creep, no surprise costs. What I’ll do: Replace deprecated API calls with new endpoints Update authentication (likely to SHA-2, JSON/XML handling) Maintain all existing functionality (rates, tracking, address validation) Keep .NET 4.8 compatibility—no framework changes Test all methods against new API specs Deliver clean, commented code with migration notes Timeline: 2-3 days for full implementation and testing. Bid: Fixed price as quoted—no negotiations. I’ll confirm exact USPS API type (Shipping APIs v4, etc.) before starting to ensure accuracy.

@fahad508

Hello, I can update your existing C# USPS module to use the new API while keeping it on .NET Framework 4.8. The work will focus solely on replacing the deprecated API calls with the new endpoints without altering any other functionality. I’ll ensure it integrates seamlessly and continues to perform as expected. I have a few questions to clarify: 1 Do you have full documentation for the new USPS API and access credentials ready? 2 Are there any existing unit or integration tests I should run after updating the API? 3 Should I maintain any logging or error-handling conventions already in place, or can I update them as needed for the new API? I’d be happy to discuss this further to ensure it meets your exact needs. Best, Fahad Tanwir

@thomasb726

⭐If you award me, your smile shows up.⭐ Hi Christopher K H. Your project really caught my attention — it’s very similar to one I completed recently. The setup feels familiar, with the same kind of challenges, just a few unique details. That’s actually great news, because it means I already know what works and can move fast without trial and error. Most importantly, I have deep experience and hands-on expertise with .NET, API Development, API Integration, C++ Programming, .NET Core, PHP, Software Architecture, Software Development and C# Programming. In my portfolio, you can find a project similar to yours. https://www.freelancer.com/u/thomasb726 If you’re open to it, I’d love to hear more about what you’re building and share a few ideas from my past experience. ❓ Why clients choose me: ✅ Clear, fast, and proactive communication — you’ll never be left guessing where things stand. ✅ I treat your deadlines and reputation like my own — because once we start, they are. ✅ Easy to talk to, quick to respond, and focused on making your job easier. ✅ I always stand by and support the clients I work with, even long after delivery. Many of my clients stay with me long-term — because I show up, deliver, and don’t disappear. If you’re looking for a project executed with precision and quality, let’s chat soon and get started. Best, Tom

@MuteXsolutions

Hi there, I went through your requirements, and the task is very clear: your existing USPS module in .NET Framework 4.8 needs to be updated to use the new USPS API before the old one is deprecated. No architecture changes, no refactoring — just a clean, accurate replacement of the API integration while keeping the rest of the module fully intact. We can implement the new endpoints, update request/response handling, and ensure everything works smoothly with your current codebase. We’ll test the module end-to-end so the transition is seamless and nothing breaks after the switch. Looking forward to your positive response.

@novatech2210

Hi Christopher, I appreciate the clarity in your project for updating the USPS API. It's great you're proactively addressing the deprecation before year-end. I fully understand the need to seamlessly replace the existing deprecated USPS API within your C# module, strictly maintaining .NET Framework 4.8 compatibility. With extensive experience in C#, .NET Framework development, API integration, and module development, I am perfectly suited for this precise task. My approach involves directly implementing the new API methods while ensuring all existing module logic integrates flawlessly, followed by thorough testing. I anticipate delivering the updated module within 3-4 days, with a single milestone upon successful integration and testing. Looking forward to discussing this further!

@oleksandrf3

Hi there, I hope you are doing well. I have carefully read your project details and I’m confident that I can deliver high-quality results that meet your expectations. I always focus on writing clean and efficient code while ensuring the final product is reliable and easy to maintain. My priority is to provide you with a perfect solution on time and within your requirements. I value clear communication and always strive to build long-term collaborations with my clients. Whether it’s developing new features, fixing issues, or improving existing systems, I approach every task with full dedication. I always work as a developer, not just a coder. So I always review the requirement carefully and sometimes find the potential issues and suggest better solution based on the deep understanding of the project and my expereince in this field up to now. I am confident that my experience and commitment will bring value to your project. Looking forward to discussing more details and starting work with you soon. Best regards, Oleksandr

@robertw0802

Hi Christopher, I’m Robert, a Senior Full-Stack & AI Engineer with over 10 years of experience architecting and delivering SaaS platforms, automation systems, and intelligent applications, highlighting my top strengths in C#, .NET, and API integration. Recently, I successfully updated a shipping module to replace a deprecated API, ensuring seamless functionality with enhanced performance. My deep technical background in full-stack and API integration aligns perfectly with your need to implement the new USPS API into your existing C# module. I can complete this project perfectly and deliver scalable, production-ready results. I am committed to clean architecture, structured documentation, CI/CD automation, and OWASP-based security practices. Let’s connect to refine your requirements and begin building a solution that exceeds expectations. What specific features and functionalities are critical for the new USPS API integration?