Custom ERP API Development

@atitudesam

As a team of highly experienced Web Developers, we're no strangers to developing top-notch APIs that are not only efficient but easy to use. Our proficiency in languages such as Node.js, PHP, and Laravel makes us the perfect fit for your project. We're well-versed in designing clean APIs that can seamlessly integrate with your existing system and utilize API Key strategy for authentication, just like you desire. In addition to fulfilling your core requirement, we believe in future-proofing our solutions. This is evident in our skillset which encompasses frameworks like OAuth2 and JWT that allows for easy upgrades and scalability as per your needs. You will not find from us "quick fixes" but rather well-thought-out, robust solutions that will stand the test of time. Finally, with us, the project isn't over after delivery of the code. We ensure smoother deployment via a git repository and maintain clear changelogs for easy tracking. As deliverables, you can expect thoroughly tested code, a comprehensive documentation, a handy Quick-start guide for your teams, and most importantly an uncompromising attitude towards security and data handling best practices. So let's team up and make this ERP system truly yours!

@nicolasalexandro

Hey — saw your post about extending your ERP with a clean, well-documented API for custom modules. Most custom ERP APIs become hard to maintain when versioning and business rules aren’t structured clearly from the start. Quick question before I suggest an approach: Are you looking to follow a REST-first design with clear versioning (v1, v2), or do you also want GraphQL or webhooks for event-driven workflows? I’ve designed and documented APIs for internal ERPs before, including auth, role-based access, and module-specific endpoints that other teams can safely build on. If you can share your current ERP tech stack and a rough list of the modules/endpoints you need, I’ll review and tell you what’s realistic in terms of structure and timeline.

@technologiesit

As a highly experienced and thorough API Developer, I have spent the past decade working on projects that require developing, testing, and documenting APIs just like your project demands. I have a proven track record of managing and implementing clean, organized, and well-documented APIs that integrate seamlessly with existing systems - something that is pivotal for your customized ERP expansion. Alongside my team of experts at our Prajapati Technologies, we will ensure all your core requirements are met to the letter. While upholding the essential API Key strategy for user authentication, we can even go a step further and build an architecture that can support OAuth2 or JWT in the future, should you require it. Your satisfaction is our prime objective and commitment. Furthermore, I'm well-versed in GIT deployment and updating changelogs which means I can offer you a streamlined handover process and keep you updated on every phase of the project. With me, it isn't about just completing the job; it's about offering impeccable service that includes proper documentation, setup guides, and post-project support for your teams to easily navigate the newly built modules. Thank you for considering us for this critical project - we aim to exceed your expectations in every manner possible!

@nevenac888

Hi, I can build clean, well-documented REST API endpoints for your custom ERP modules that fit your existing sandbox and production key pattern. As I recently joined this platform, I have solid experience with backend API development, Git-based delivery, Postman testing, and clear developer documentation, and you will get endpoints that are easy to integrate and maintain. I will implement API Key authentication end to end, structure the middleware so adding OAuth2 or JWT later is straightforward, and deliver consistent error handling and responses. I will provide source code, a Postman collection covering both environments, quick-start setup notes, key obtain and rotate steps, a brief security checklist, and I will deploy via Git with changelog updates. Review: https://www.freelancer.com/u/nevenac888 I’m offering a competitive rate while delivering high-quality work that meets your requirements. Looking forward to working on your project. Thank you.

@Mototive123

Hello Adeshina I actually completed a very similar API development task recently, which you can see reflected in my latest review on my Freelancer profile. That project involved creating custom REST APIs, implementing secure authentication, and delivering clean documentation for other developers to integrate easily. For your ERP expansion, I can: Build clean REST API endpoints for the required modules Implement API Key–based authentication (structured so OAuth2/JWT can be added later) Maintain separate sandbox and production environments with different keys Provide a Postman collection for both environments Deliver clear documentation, setup notes, and error handling examples Deploy via Git with proper changelog updates I regularly work with PHP, REST APIs, ERP integrations, and API security, so integrating with your existing inventory, HR, and accounting modules will be straightforward. Thanks, Kartik Desai

@haseebsidd07

Hey , I just finished reading the job description and I see you are looking for someone experienced in API Integration, API Testing, API Development, RESTful API, OAuth, Full Stack Development, Documentation, Backend Development, Git and ERP. This is something I can do. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: 1. These are all the requirements? If not, Please share more detailed requirements. 2. Do you currently have anything done for the job or it has to be done from scratch? 3. What is the timeline to get this done? Why Choose Me? 1. I have done more than 250 major projects. 2. I have not received a single bad feedback since the last 5-6 years. 3. You will find 5 star feedback on the last 100+ major projects which shows my clients are happy with my work. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) I will share with you my recent work in the private chat due to privacy concerns! Please start the chat to discuss it further. Regards, Haseeb,

@Tacticssoft

Hi, I can help design and implement clean, well-structured API endpoints for your ERP modules while ensuring they integrate smoothly with your existing sandbox and production environment pattern. I have strong experience building secure REST APIs with proper authentication, documentation, and version control, and I focus on writing clean, well-documented code that other developers can easily maintain. My approach: • Develop RESTful API endpoints for the new ERP modules • Implement API Key–based authentication with secure validation and middleware • Structure the authentication layer so it can easily support OAuth2 or JWT in the future • Maintain clear separation between sandbox and production environments • Implement consistent error responses and status codes Deliverables will include: • Full source code for the API endpoints • Postman collection demonstrating all calls for sandbox and production • Quick-start documentation explaining environment setup, API usage, and key rotation • Security checklist covering API key storage, validation, and best practices • Deployment via Git with proper commit history and changelog updates I’ll ensure the APIs are well-structured, secure, and easy for other teams to integrate with your ERP system. I’d be happy to review your current API structure and module requirements so the new endpoints align perfectly with your existing architecture. Looking forward to collaborating on this

@arbu1499

Hi! I can develop clean, well-documented API endpoints for your custom ERP modules in Laravel and Node.js, fully compatible with your existing sandbox and production environments. I’ll implement API Key authentication with a future-ready architecture that allows OAuth2/JWT later, thoroughly test all endpoints, and provide a Postman collection, setup notes, and security checklist so your team can integrate smoothly. The code will be deployed via GIT with proper changelogs for easy tracking and maintenance. Looking forward for your positive response in the chatbox. Best Regards, Arbaz T

@shibbuquadir

As the head developer at Paper Perfect, I would be thrilled to take charge of your ERP API Development project. With a strong background in API Development, API Integration, Backend Development, and Git, I bring a wide array of skills essential for building a clean, well-documented API that aligns seamlessly with your existing system. At the heart of our work is the use of Django (a powerfully secure and scalable framework) to create APIs that are not just functional but future-proof. In addition to the core requirement of user authentication using an API Key strategy, my team and I can architect endpoints capable of integration with OAuth2 or JWT assuring seamless expansion whenever necessary. Post-development, we ensure your team's readiness to navigate the new area with concise documentation that includes setup notes and a quick-start guide for easy understandability. We're also sensitive towards security and will provide you with a brief security checklist confirming API Key handling and storage best practices. Ultimately, by choosing my team at Paper Perfect for this project, you're bringing on board not just expert developers but dedicated professionals committed to delivering exceptional results on time and within budget. Alongside handing over source code for the new API endpoints, we'll supply a Postman collection demonstrating each call in both environments alongside deploying your code via GIT and maintaining detailed changelogs.

@crystalhitesh

Hello, I’m a Senior Full Stack Developer with 10+ years of experience building secure and scalable APIs using Laravel and Node.js. I can develop clean, well-structured REST endpoints for your ERP modules with API Key authentication, while keeping the architecture ready for future OAuth2/JWT integration. I’ll provide tested endpoints, a complete Postman collection, clear sandbox/production documentation, and secure key-handling practices. All code will be version-controlled via Git with proper changelogs. Best regards, Hitesh Goyal

@ravindrababbar9

Hello, I can help extend your in-house ERP by developing clean, secure, and well-documented API endpoints in Laravel or Node.js that integrate smoothly with your existing sandbox and production environments. Approach • Build RESTful API endpoints for the new ERP modules following your current architecture • Implement API Key–based authentication for both sandbox and production environments • Structure the code to allow future upgrades to OAuth2 or JWT without major refactoring • Ensure consistent JSON responses, validation, and error handling Development Standards • Modular and maintainable API structure • Environment-based configuration for sandbox vs production keys • Secure API key validation and storage practices • Clear versioning and changelog updates via Git Deliverables • Complete source code for the new API endpoints • Postman collection demonstrating all calls for sandbox and production • Quick-start documentation explaining endpoints, authentication, and environment usage • Security checklist covering API key handling and best practices • Deployment through Git with updated changelogs I’m comfortable reviewing the attached PDF and existing APIs to ensure the new modules follow the same patterns and integrate cleanly with your ERP system. Best regards.

@arslanshahid386

Hi there, I see that you're looking to develop a custom API for your ERP system, focusing on user authentication with API Keys and ensuring it integrates seamlessly with your existing modules. With 4+ years of experience in API development and a strong background in ERP systems, I can create clean, well-documented endpoints that fit your dual-environment setup. My approach would involve designing the API endpoints to handle authentication securely while laying the groundwork for future enhancements like OAuth2 or JWT. I’ll also provide detailed documentation, along with a Postman collection for easy testing. I'm curious about the specific modules listed in the attached PDF—are there any particular functionalities or user scenarios you'd like me to prioritize when developing the API? Best regards, Arslan Shahid

@Mayanks010

Hi there, You’re absolutely in the RIGHT PLACE. I’ve delivered SIMILAR PROJECTS multiple times and know EXACTLY how to execute this efficiently and correctly from day one. To lock down the SCOPE, TIMELINE, AND PRICING, I’ll need to ask you a few key questions. Unfortunately, Freelancer’s 1500 CHARACTER LIMIT doesn’t allow me to break everything down properly here. Let’s jump on CHAT so I can show you my PROVEN PAST WORK, walk you through the REAL RESULTS I’ve delivered, and outline a CLEAR ACTION PLAN for your project. You’ll immediately see why my approach is DIFFERENT and EFFECTIVE. If you’re serious about getting this done RIGHT, I’m ready to move forward. Looking forward to CONNECTING and WINNING TOGETHER. Cheers, Mayank Sahu

@jagratip3

Dear Hiring manager, I’d be glad to help design and implement the new APIs for your ERP system. I have experience building secure, well-structured APIs for enterprise systems, including modules that integrate with inventory, HR, and accounting platforms while maintaining clean architecture and clear documentation. For your requirement, I will develop API endpoints that follow your existing sandbox and production environment structure, ensuring proper separation of keys and configurations. Authentication will be implemented using a secure API Key strategy, with the architecture designed so that OAuth2 or JWT can be integrated later without major refactoring. I will also prepare fully tested endpoints, a Postman collection demonstrating calls for both sandbox and production, and clear documentation explaining how to obtain, rotate, and manage API keys. The documentation will include error handling examples, request/response structures, and environment setup instructions so other developers can integrate quickly. All code will be delivered via Git with proper version control and changelog updates, along with a security checklist covering API key storage, request validation, and access best practices. I’d be happy to review your current API structure and discuss the implementation approach. Best regards. Jagrati.

@sadam61

Hi there, I’m excited about the opportunity to develop a clean, well-documented API for your in-house ERP expansion. With over 9 years of experience in API development, particularly in Laravel and Node.js, I am confident in my ability to create robust endpoints that seamlessly integrate with your existing inventory, HR, and accounting systems. I have successfully completed similar projects, ensuring that I adhere to best practices while focusing on speed and reliability. I will implement user authentication via API Key, allowing for future enhancements with OAuth2 or JWT. You will receive the source code, a Postman collection for both sandbox and production environments, a quick-start guide, and a security checklist for API Key handling. I can start immediately and will ensure timely communication throughout the project. Let’s discuss any specific features or requirements you have in mind!

@nguyenphuclam06

Hi there, I’m Lâm, and I’ll deliver a clean, well-documented ERP API that plugs into your dual sandbox/production pattern with API Keys right now and a forward-fit path for OAuth2/JWT later. ✔ I’ll implement modular Laravel and Node.js endpoints that match your existing inventory, HR, and accounting modules, with consistent naming, versioned routes, and a thorough test suite. ✔ I’ll provide concise, developer-friendly docs showing sandbox vs production calls, key rotation, error codes, and a quick-start for new teams. ✔ I’ll hand over a Postman collection (or similar) for each environment, plus a setup checklist and a security brief focused on API Key handling, storage, and rotation. ✔ I’ll deploy via Git and maintain changelogs so your team can track progress with confidence. What you’ll get: - Source code for new endpoints with API Key auth and future-proofing hooks - End-to-end tests and a Postman collection for sandbox and production - Setup notes, quick-start guide, and a brief security checklist - Clear, concise docs on error handling and rotation procedures Best regards, Lâm

@ahmadraza001912

Leveraging over 4 years of experience in API integration and full stack development, I believe I am the proficient developer for your Custom ERP API Development project. I have a solid background in building clean, well-documented APIs using various frameworks such as Django and FastAPI to ensure the smooth functionality of complex systems like ERPs. Additionally, a key aspect of my work is taking into account future-proof requirements by integrating OAuth2 or JWT that can be easily added in the future. Security and best practice adherence are always at the forefront of my mind when crafting APIs. Hence, you can rest assured that your user authentication via API Keys will be handled securely and designed with growth in mind. I'm well-versed in producing thorough documentation explaining complex processes in an accessible manner, making it easy for other developers to replicate and work on your applications. Moreover, my proficiency with Git ensures effortless code collaboration throughout the project and my regular changelogs allow everyone on board to stay updated. Give me the privilege of working with you on this project, and I'll provide not only exemplary APIs and their corresponding endpoints but also an array of additional benefits including extensive postman collections for each call, a detailed quick-start guide for other teams, and a comprehensive security checklist that confirms underlines best practices in API Key handling & storage.

@umekayani01

Hey there, When APIs are unclear, teams hesitate. When authentication is weak, security is at risk. When documentation is messy, integration slows down. Your key pain point is not building endpoints, it is ensuring clean API Key authentication across sandbox and production without breaking your existing ERP structure. Solution logic: middleware-based API Key validation with environment mapping, for example if(hash_equals($storedKey,$requestKey) && $env==='sandbox'){ allow(); } else { deny(401); } ensuring secure, isolated access per environment with logging and rotation support. I can start immediately, review your existing API and PDF, and deliver tested endpoints with Postman collection and Git deployment. Let’s open chat now so I can secure this properly before delays affect your rollout. Inbox me ASAP Warm regards, Umer Kayani

@alvinm66

Hi, I can build clean, well-documented REST API endpoints for your custom ERP modules that plug into your existing sandbox and production pattern. As I recently joined this platform, I have solid experience with backend API development, Git-based delivery, Postman testing, and clear developer documentation, and you get endpoints your team can integrate quickly with fewer back-and-forth questions. I will implement API Key authentication now, structure the middleware so adding OAuth2 or JWT later is straightforward, and deliver tested endpoints with consistent error handling. I will provide a Postman collection covering both environments, plus quick-start setup notes, key issuance and rotation guidance, and a brief security checklist for safe key storage and usage.