API Conversion Assistance Needed

@nicolasalexandro

Hey — saw your post about migrating your existing API to a new format. The biggest risk with these moves is breaking existing clients while trying to modernize the structure and responses. Quick question before I suggest an approach: Do you already have a clear target spec for the new API format (OpenAPI/Swagger, GraphQL, etc.), or is that part still flexible? I’ve handled several API migrations end-to-end, including versioning, backwards compatibility, and testing to avoid downtime and hidden breaking changes. If you share the current API docs, code repo, or target spec, I can review it and tell you what’s realistic in terms of effort and timeline.

@mahads31

Hi, I took the time to review your project and it’s clear that this is completely doable with the right development approach. I have strong expertise in API Development, REST API, Git, XML, API Integration, JSON, API Testing and Software Development and specialize in building efficient, modern, and scalable web solutions. My work focuses on clean development, responsive design, optimized speed, and a user-friendly interface to ensure everything runs smoothly and professionally. I’m confident I can deliver a high-quality result that meets your expectations. Best regards. Mahad Sheikh

@engruhulajom

Hello, Hope you are doing fine. I have extensive experience in API migration and refactoring across multiple formats including REST, SOAP, XML, and JSON. Your project requiring end-to-end API conversion with flexible target specifications aligns perfectly with my skill set. My approach: - First, review your existing API documentation and codebase thoroughly - Analyze current endpoints, authentication flows, and error handling patterns - Propose optimal target architecture with clear trade-offs in performance, security, and backwards compatibility - Implement conversion ensuring seamless functionality across all endpoints - Provide concise technical documentation and quick start guide I am proficient with Postman, Swagger/OpenAPI, and Git, and have successfully migrated several APIs for clients. I can share relevant examples via message. Please share the existing API documentation and any specific requirements so I can provide a more detailed timeline and approach. Best regards, Md Ruhul Ajom

@uniqedeveloper

Hi, I totally understand your requirement—you need a clean, reliable **API migration from legacy/uncertain formats to a modern, well-structured architecture**, while preserving functionality, auth flows, and backward compatibility. I recently handled a **SOAP-to-REST + JSON standardization project**, where I audited endpoints, mapped schemas, and introduced an **OpenAPI-first design**. We built a compatibility layer to avoid breaking clients, improved response times ~40%, and delivered clear Swagger docs + Postman collections for smooth adoption. For your case, I’d start with a **contract-first approach (OpenAPI)**, normalize payloads (JSON-first unless XML required), refactor auth (JWT/OAuth if needed), and implement versioning (/v1 → /v2) to ensure safe rollout. I’ll also provide concise docs and a quick-start guide. Let me know when you’re available to discuss this further I’d be happy to walk you through my approach or showcase examples relevant to this project. Looking forward to hearing from you! Best regards, Mulayam

@anshumanvermaUK

Hi, I can help migrate your existing API to a modern, scalable format by reviewing the current implementation and proposing the best architecture (REST/OpenAPI or similar). I’ll handle endpoint conversion, authentication, and error handling while ensuring backward compatibility where needed Thanks Anshuman

@tadinhkien

Thank you for considering my application for this project. As an AI Engineer and Python Developer with over 8+ years of experience, I bring a wealth of knowledge and expertise in the field of Python, Deep Learning. I have carefully reviewed the project description and am eager to discuss your specific needs and requirements in more detail. My commitment is to provide dedicated support and consistent follow-up throughout the project's lifecycle. Please feel free to reach out to me to further discuss how I can contribute to the success of your project. Looking forward to the opportunity of working together. Best regards, KuroKien

@somendersingh96

Hello, I can help you successfully migrate and refactor your API with a clean, scalable, and well-documented approach. I will review your existing API, design an optimal architecture, and handle the full migration—ensuring all endpoints, authentication, and error handling work smoothly. I’ll also provide clear documentation for easy future maintenance. With strong experience in API development and tools like Postman and Swagger, I focus on performance, security, and reliability throughout the process. Let’s discuss your requirements and get started. Best regards, Somender Singh

@craigd43

With my extensive experience in full-stack web development, your API conversion project is right within my wheelhouse. I appreciate your call for a developer who can handle the entire process from reviewing the existing API documentation and code base to implementing smooth end-to-end conversion while offering guidance along the way. My background speaks to this perfectly: I've handled similar tasks repeatedly and expertly. In line with your need for a developer who understands, not only API conversion but also the common tools used in it, I am well-versed in Postman, Swagger/OpenAPI, and Git, ensuring that I have what it takes to handle this project seamlessly. Moreover, I understand the importance of communication when it comes to any project - this includes trade-offs in areas of performance, security, and backwards compatibility -which would remain open throughout our collaboration. As a detail-oriented individual, I also guarantee concise technical documentation and a quick start guide for easy future maintenance. In essence, with my skills centered on REST API management and understanding of multiple formats, I offer both technical expertise and an eagerness to tailor everything precisely to your needs. I also bring precise time management to every job as testified by my ability meet deadlines while keeping quality intact. Choose me for your API conversion needs as there's no better candidate for your success than one

@johnedwardl

Hi, I will handle the end-to-end migration of your API to the new format, ensuring a smooth transition while maintaining functionality. My experience includes successfully migrating APIs from REST to various formats, including XML and JSON, while modernizing legacy SOAP calls. I’ll begin by reviewing your existing API documentation and codebase to identify the best approach for architecture and data formatting. Once we establish the target format, I’ll implement the conversion, focusing on seamless integration of all endpoints, authentication flows, and error handling. My aim is to ensure performance, security, and backwards compatibility throughout the process. I will also provide concise technical documentation and a quick start guide for future maintenance. I’m proficient with Postman, Swagger/OpenAPI, and Git, which will facilitate smooth communication and collaboration. To proceed effectively, could you clarify if there are specific features or endpoints that require particular attention during the migration? Let’s get this moving quickly. Thank you.

@Saifkhan642

Hi, I can do this work I’ve done similar work and can deliver fast. Let’s discuss details further.

@matheussilva114

Hi, I have checked the details. I am a senior engineer with over 7 year of experience on XML, Software Development, Git, JSON, API Development, API Integration, API Testing, REST API. Please visit my profile to view my latest projects, certificates, and work history. Best, Matheus Thank you, Matheus

@zeldac1

Hi, I saw you're migrating an API to a new format and need end-to-end conversion guidance. I’ll start by reviewing the existing API docs and codebase to spot gaps between REST, XML/JSON payloads, and SOAP flows. Quick insight: misaligned data models or auth flows across formats is the usual culprit for drift after migration. Proposed approach: • review endpoints, auth, error handling • define a target format (OpenAPI + JSON/XML schema) • implement conversion with backward-compatible wrappers • add docs and a quick-start guide I recently migrated a mixed REST/SOAP gateway to a unified OpenAPI setup with preserved backwards compatibility and clear docs. Can you share the repo or a link to the current docs so I can size the effort?

@cloydn4

✨Hello✨, Thank you for the opportunity to submit this bid for your API migration project. I have carefully reviewed the scope and am excited to present my approach. Past problem solved: I migrated an enterprise REST API to OpenAPI-driven design, consolidating XML payloads into JSON, while preserving auth flows and error contracts. ✅My plan: ✓ Review current docs and code to map endpoints, auth, and error handling. ✓ Propose a target architecture (likely OpenAPI with JSON payloads, optional SOAP/legacy bridge). ✓ Implement conversion with incremental adapters and tests in Postman/Swagger; ensure backward compatibility. ✓ Provide concise docs and a quick-start guide for maintenance. What is your preferred target format (JSON vs XML) and any critical backward-compatibility constraints to prioritize first? ⏲️Please I would love to discuss this project further and answer any questions you may have. Best regards, Cloyd

@luiss130

Hello, As a seasoned and tech-savvy developer, I bring to the table a wealth of experience in API Development and Integration, which is perfectly aligned with your migration needs. Throughout my career, I've successfully undertaken numerous API migrations, including those requiring translation of REST endpoints, restructuring of XML or JSON payloads, and modernisation of legacy SOAP calls. This gives me capable hands-on skills in potential approaches for your project. One of my strengths is my ability to strategize and create an optimal target architecture and data format to ensure seamless operation even during transitions. I'm proficient with tools such as Postman, Swagger/OpenAPI, and Git, that are vital to get the job done efficiently. Furthermore, I reckon on my strong analytical mindset to dissect trade-offs in performance, security, and backwards compatibility; so we're sure to make well-informed decisions. In choosing me for this project, you'll not only benefit from my technical aptitude but also from succinct technical documentation and quick start guide I will provide for future maintenance, a bonus service from someone who values client satisfaction even after the job is done. Given an opportunity, I envisage a streamlined process delivered within a reasonable timeline. Looking forward to discussing more about your project details. Thank you! Thanks!

@linht321

Hello, With over six years of experience as a Full Stack Web Developer, I'm well-versed in the realm of API development and integration. As for your project, my skill set is perfectly aligned with your requirements: from Python's Flask onto Django, RESTful APIs to C#'s ASP.NET Core, I'm comfortable with all the platforms needed for your API conversion. Additionally, I've extensively worked with Swagger/OpenAPI and Git, ensuring a smooth migration while being focused on performance, security, and backwards compatibility. Beyond just the knowledge and tools at hand, I believe it's imperative to be able to communicate clearly and provide concise technical documentation for seamless maintenance; that's another aspect you could depend on me for. In my portfolio, you'll find successful migration projects with several key similarities to yours - APIs refactored across multiple formats. In summary, my technical expertise combined with a passion for delivering efficient, user-friendly digital solutions makes me the ideal candidate for your API conversion project. Let's discuss further about your preferred approach and estimated timeline so we can get to work smoothly. Looking forward to bringing your project to life, together! Thanks!

@pankajp809

Hello, I understand you need help with API conversion and making it work properly with your system. I have experience working with APIs, backend logic, and data handling, so I can convert the API structure, map fields correctly, and make sure everything works smoothly without breaking existing flow. I can help you with: API conversion (old to new / format change) data mapping and response structure fix backend integration debugging and error handling I’ve worked on API-based backend development, so I focus on keeping things simple, clean, and reliable. I can complete this in 2–4 days depending on the complexity. Let’s connect and I’ll start working on it right away

@sandeeps81

I propose to take up this project at a rate of €19 per hour, with an estimated timeline of approximately 7 days for completion. With 9+ years of experience in Android development, I will ensure high-quality, scalable, and maintainable code using modern technologies such as Kotlin, Jetpack Compose, Clean Architecture, and Kotlin Multiplatform where applicable. The approach will include clear requirement analysis, structured development, regular progress updates, and thorough testing to ensure performance, security, and reliability. I am committed to timely delivery and open communication throughout the project lifecycle to meet your expectations effectively.

@bhartimalu

Hello, I can help with your API conversion, ensuring smooth integration and accurate implementation to meet your requirements. Regards, Bharti

@karstenm6

▀▄▀▄ Hello ▄▀▄▀ API migration isn’t just conversion, it’s about architecture, performance, and future-proofing while keeping everything stable. -> In our project : First, I’ll audit your current API (REST/SOAP/XML/JSON). Then propose a clean target (REST + OpenAPI, or hybrid if needed). I’ll refactor endpoints, normalize payloads, and secure auth (JWT/OAuth). Backward compatibility via versioning or adapter layer. Testing with Postman + full Swagger docs + quick-start guide. Goal: faster, scalable, and easy-to-maintain API. I cannot fully describe it in the proposal, but what I want to say is that I am willing to work full-time or more, within a more comfortable budget than other developers, and at your timezone. We can discuss our projects via message or call. Pricing will be determined through project consultation. -> Availability : • Available to work 30-40 hours even 40+ hours per week • Can start immediately • Can work at client's preferred timezone • Available to answer to client's message immediately • Update the result daily, every week Since I have no full-time project, and totally free, I can start with this project as soon as possible. In addition, I am always trying to pay attention on the relationship with clients, especially for the long term one. Looking forward to hearing from you soon! Thanks Karsten