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I have already designed and built most of C’8 – Coordinate, an open-source aid-coordination platform you can preview here: https://www.c8coordinate.com. The interface is in place; where I need help is on the backend. Your main task will be to implement and refine our internal APIs so the existing frontend can finally talk to the server smoothly. You will be shaping the data flow between the client app and the database layer: creating clean, well-documented endpoints, handling authentication hooks already stub-built, ensuring robust validation, and returning responses the UI expects. I am using a Git-based workflow and will grant access to the repo plus a small set of Postman collections that describe the calls I need. Key deliverables • Fully working internal API endpoints that mirror the current Postman specs • Brief inline documentation and a short README so future contributors can extend the service • A set of unit tests proving each endpoint’s happy path and major edge cases • Deployment instructions that let me spin the service up in a fresh environment with a single command If you enjoy clean code, clear specs, and collaborating on open-source humanitarian tech, let’s talk.
Project ID: 40573987
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202 freelancers are bidding on average $21 USD/hour for this job

Hi — Elias here from Miami. I see you’ve built most of the C’8 platform and are looking to integrate the backend API. This step is crucial, as it directly impacts the usability and effectiveness of your aid-coordination efforts. The real challenge often lies in ensuring seamless data flow and maintaining a reliable connection between your existing components and the new API. What usually matters most is how well the system scales and adapts to future needs. A common issue in systems like this is managing permissions and access control across different user roles. My approach would focus on structuring the API for stability and ease of maintenance. I’d prioritize clear documentation and robust error handling to ensure the integration is functional and easy to troubleshoot later. I've worked on similar integration projects, enhancing platforms with RESTful APIs and ensuring smooth interactions with various databases. A few questions to better understand the scope: Q1 – What specific user roles will interact with the API, and how are their permissions structured? Q2 – Are there existing integrations with third-party services that need to be accounted for? Q3 – What are your scalability expectations for the API as user demand increases? Happy to discuss the details and suggest the best technical approach. Looking forward to hearing from you.
$50 USD in 7 days
7.8
7.8

Hello!, I am a Florida-based senior software engineer(frontend, backend, ecommerce, etc) with 15+ years of experience building production-grade APIs, backend systems, and software that is clean, stable, and easy to maintain. I read your C8 Backend API Integration project carefully, and it’s clear the goal is not just “connect an API” but to finish C’8 - Coordinate in a way that supports an open-source aid-coordination platform properly. That’s exactly the kind of detail-focused work I enjoy. My approach would be: 1. Review your current backend structure and existing API gaps 2. Map the required endpoints, auth flow, and database changes 3. Implement the integration cleanly with Git-friendly commits 4. Test everything, then document it so it’s easy to maintain and extend I’ve worked extensively with RESTful APIs, backend development, Git, database management, documentation, and open-source projects, so I’m comfortable jumping into an existing codebase and getting it done right without adding confusion. Could you please clarify the following questions to help me better understand the project? 1. Which backend stack is C8 currently using, and are the endpoints already partly defined? 2. Should I only handle backend API integration, or also update documentation and any database schema changes? 3. Is there a target deadline or milestone you want me to aim for? If helpful, I can also share a few relevant projects I’ve handled in similar API and backend work.
$50 USD in 5 days
6.8
6.8

I can help with this, Hi, I will wire up the C8 Coordinate API endpoints to match your existing Postman collections, connect the auth stubs, add input validation, and return the exact response shapes your frontend expects. Unit tests for happy paths and edge cases included, plus a one command deploy setup. I will document every endpoint inline and in the README so future open source contributors can extend without guessing. Questions: 1) What stack is the backend using (Node/Express, Python/Flask, something else)? 2) How is the database layer set up: ORM, raw queries, or still TBD? Share repo access and I will review the Postman specs tonight. Looking forward to potentially working together. Thanks, Kamran
$19 USD in 40 days
6.6
6.6

Hello Steve, I have carefully reviewed the C'8 vision and the backend API requirements. The humanitarian mission behind this platform is inspiring, and I would be glad to contribute my technical expertise. >>>> Multi languages (English and Spanish )) <<<< **** You can track the project’s progress using the tracker. I’m available to work 40 -45 hours per week **** I have 10+ years of experience in backend development, REST APIs, authentication, database design, API validation, Git workflows, unit testing, and deployment. I can implement the required endpoints based on your Postman specifications, integrate them seamlessly with the existing frontend, document the architecture, write comprehensive tests, and help restore the platform to a stable, production-ready state. My development approach focuses on clean, maintainable, and well-documented code with scalable architecture so future contributors can easily extend the platform. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE WHERE APPLICABLE. WE WILL FOLLOW AN AGILE METHODOLOGY AND I WILL ASSIST FROM DEVELOPMENT THROUGH DEPLOYMENT. I eagerly await your positive response. Thanks. Christina
$15 USD in 40 days
6.4
6.4

Hi there, I can already see the hidden bottleneck here: the frontend is ready, but the backend contract still needs to be made precise so every request returns exactly what the UI expects. That’s the kind of gap I enjoy closing. I’ve built and refined PHP/MySQL and API-driven systems, and I’m comfortable working from Postman specs, tightening validation, wiring auth hooks, and adding unit tests so the service is reliable from day one. I’ll also document the endpoints clearly and prepare a simple one-command setup so contributors can get running without friction. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Which backend framework and test runner should I align with for the C8 API work? Best regards, Asad Questions: 1) Which backend stack is currently in place for C8, and are there any framework conventions I should follow? 2) Do the Postman collections represent the final API contract, or should I expect endpoint refinements as I work? 3) What test runner and deployment flow do you want used for the single-command environment setup? Looking forward to your reply so we can finalize the exact plan.
$15 USD in 49 days
6.5
6.5

Hi I understand you are looking for fully workable internal API endpoints that mirror your Postman specs, with clean data flow between the client app and the database, solid validation, and smooth integration with the existing authentication hooks. The goal is to have the frontend talk to a robust, well-documented backend that’s easy to extend in your open-source humanitarian project. I am a results-driven AI and web developer with hands-on experience in backend API development, RESTful design, and open-source collaboration. My approach is to translate your specs into reliable endpoints, enforce clear validation, and provide lightweight inline docs so future contributors can extend the service. I’ll align with your Git-based workflow and use the provided repo and Postman collections to drive a repeatable, testable delivery process. For this project, I would structure the work around concrete phases: analyze the Postman specs and existing data model, implement each endpoint with robust validation and consistent response shapes, wire in the existing authentication hooks, and add unit tests covering happy paths and key edge cases. I would then draft brief inline documentation and a short README, followed by deployment instructions that let you spin up the service in a fresh environment with a single command. The outcome is a clean, well-documented API surface that the frontend can rely on immediately. Best, Justin
$60 USD in 40 days
6.3
6.3

As a part of the multidisciplinary engineering team at MHTechFusion, we have vast experience in full-stack development, emphasizing Backend architecture, and REST API development. Implementing and refining your internal APIs to ensure smooth communication between your frontend and server aligns perfectly with our expertise. We'll shape the data flow, ensuring clean code and robust validation to provide the exact response your UI expects. Collaborating with a Git-based workflow is second nature to us, which means we can start contributing effectively from day one. The fact that you also value not just the result but its maintainability is another advantage as clean coding and comprehensible documentation are essential traits of our work. Moreover, we don't just deliver a functional system but a scalable one too - something that we have honed while building IoT systems involving complex connections between hardware, software, and cloud platforms. This ability will prove crucial in building your aid-coordination platform where scalability would be pivotal. Driven by a passion for impactful tech and a track record of successful project completions, partnering with us will guarantee an exceptional backend API integration that can meet your immediate needs while being open for extension by future contributors.
$25 USD in 40 days
6.4
6.4

Hello, I hope you're having a great day. I have hands-on experience delivering backend APIs that connect single-page frontends to relational databases, having worked on several similar builds. I implemented an internal API for a coordinated data service that handled JSON payloads, JWT authentication hooks, and complex validation of nested objects (including address arrays and timestamped events) while using Express and PostgreSQL for storage and migrations. I'd usually start by running the Postman collection against the current stubs, adding route-level validation with Joi, wiring the existing auth hooks to passport-jwt, and writing unit tests with Jest and Supertest. Then I'd add brief inline docs and a README that describes the schema and start scripts. If you have ten minutes, I'd like to compare notes on a few specifics before coding so we align on response shapes and error codes. I have some questions regarding the project: 1) Are auth tokens JWTs signed with a shared secret or an asymmetric keypair? 2) Do you expect pagination on list endpoints, and if so cursor or offset style? 3) Any environment constraints for the single-command deployment (Docker, systemd, cloud provider)? Thank you, Paramjot Singh
$23 USD in 40 days
5.8
5.8

Hi there, I have checked your requirements where you mentioned that you are looking for a c8 backend API integration….Please invite me in chat so we can discuss in detail…..
$15 USD in 40 days
7.0
7.0

Hello Greetings, After reviewing your project description, I feel confident and excited to work on this project for you. But I have some crucial things and queries to clear up. Please leave a message on chat so we can discuss this, and I can share my recent work similar to your requirements. Thanks for your time! I look forward to hearing from you soon. Best Regards.
$15 USD in 40 days
5.7
5.7

⭐⭐⭐⭐⭐ Create Internal APIs for C’8 – Coordinate Open-Source Platform ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for backend support for your open-source platform. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects focused on API development. I will implement and refine your internal APIs to ensure smooth communication between the frontend and server. ➡️ Why Me? I can easily build your internal APIs as I have 5 years of experience in API development, backend integration, and database management. My expertise includes creating endpoints, handling authentication, and ensuring data flow between applications. Additionally, I have a strong grip on testing and deployment practices. ➡️ Let's have a quick chat to discuss your project in detail, and I'll show you samples of my previous work. I look forward to discussing this with you! ➡️ Skills & Experience: ✅ API Development ✅ Backend Integration ✅ Database Management ✅ Endpoint Creation ✅ Authentication Handling ✅ Data Validation ✅ Unit Testing ✅ Documentation Writing ✅ Git Workflow ✅ Postman ✅ Open Source Collaboration ✅ Deployment Instructions Waiting for your response! Best Regards, Zohaib
$17 USD in 40 days
5.5
5.5

Hi, ★★★ Node.js Expert ★★★ I can help you implement and refine the internal APIs for C’8 – Coordinate. My focus will be on creating clean, well-documented endpoints that align with your Postman specs. I will ensure robust validation and handle the authentication hooks you mentioned. Using a Git-based workflow, I’ll collaborate closely with you to make sure everything integrates smoothly with the existing frontend. Deliverables will include fully functional API endpoints, inline documentation, unit tests for each endpoint, and deployment instructions for easy setup. Ready to get started!
$20 USD in 40 days
5.1
5.1

I hope you're well today! My name is Özgür, and I believe I'm an ideal match for your C8 backend API integration project. As a seasoned Full Stack software engineer with over a decade's worth of experience, your request aligns perfectly with my skillset. Besides having developed and integrated APIs for the likes of Firebase, Google Maps, and social media handles like Facebook, Twitter and Instagram, I'm also quite adept at handling backend development tasks. During my career, I've overseen projects similar to yours - involving careful data flow management between client apps and the database layer. Notably, I've created clean endpoints with robust validation mechanisms that interface flawlessly with frontends. Past clients frequently commended me for providing brief yet thorough inline documentations that facilitated easy comprehension for future contributors to extend those services. In addition to delivering fully functional internal API endpoints, I'll also provide accompanying unit tests and deployment instructions - making it simple for you to spin up the service in fresh environments. Overall, if you're searching for a diligent collaborator who appreciates clean code and finds joy in contributing towards open-source humanitarian tech, let's discuss how we can make your vision for C8 a reality!
$20 USD in 40 days
5.4
5.4

At Solves Inn, we believe in transforming innovative ideas into impactful digital products - an opportunity that your project offers us. Our decade-long experience in API and backend development will add immense value to your C'8 platform, enabling smooth communication between the frontend and the server. Our proficiency in PHP/Laravel, Python, MySQL, Node.js, and JavaScript perfectly aligns with your technology stack requirement. We hold a proven record of translating complex requirements into clean and scalable systems like yours. Crafting well-documented endpoints to meet precise specifications is engrained in our work ethics. This ensures seamless data flow and robust validation while assuring prompt responses as expected by your UI. Moreover, as a strong advocate of open-source projects and humanitarian tech, I am genuinely excited about collaborating with you on this venture. Our emphasis on clear code, thorough tests, concise documentation, and streamlined deployment instructions will facilitate ease for present and future contributors. Rest assured that we will not only meet but exceed your expectations from this integration project. Let's connect and rewrite the frontline of aid delivery together!
$15 USD in 1 day
4.9
4.9

The frontend stalling on “expected” responses usually signals a small set of mismatches: payload shape, auth hooks not firing, or inconsistent validation rules — fixing those contract points gets the UI moving quickly. I’ll implement each Postman-specified endpoint using contract-driven development: wire the routes, complete the stubbed auth hooks, add request/response validators, and iterate with the frontend until responses match exactly. I’ll deliver inline docs, unit tests for happy paths and edge cases, and a one-command deploy script. Best stack (if the repo is flexible): TypeScript + Express (or Fastify) with Prisma or Sequelize for Postgres, Jest + Supertest for tests, OpenAPI generation for docs, and Docker Compose for single-command deployment. If the repo already has a language/frame, I’ll align to it. For maintainability I’ll keep controllers thin, centralize validation and error handling, provide a short README and Postman-importable collection, and add CI test scripts so future contributors can extend safely. Similar work: I recently completed the backend for a volunteer coordination platform for a regional NGO — 30+ endpoints, Postman specs, 85% test coverage on happy/edge cases, and a dockerized deploy that a non-dev could run locally. If you grant repo access, do you want me to match the existing repo’s framework or migrate endpoints to TypeScript/Express?
$20 USD in 7 days
4.6
4.6

I am excited about the opportunity to contribute to the C'8 project. Your focus on creating a seamless integration between the frontend and backend aligns perfectly with my passion for clean code and robust API design. With your existing platform already established, I am eager to help implement and refine the internal APIs to ensure smooth interactions with the server. I will create well-documented endpoints and enhance authentication processes, ensuring that every aspect of data flow is both optimized and secure. Furthermore, I understand the importance of collaboration in open-source initiatives, and I am committed to delivering thorough inline documentation and deployment instructions that will benefit future contributors. My approach involves not just achieving the current project requirements, but also setting up a sustainable framework for future growth and development. I believe that great solutions are built on clear specs, and I am dedicated to delivering exactly what you envision. Additionally, I would love to hear your thoughts on how you foresee the evolution of the C'8 platform in the coming months and how we can best prepare for that. How do you envision the future enhancements for the C'8 platform after this integration?
$25 USD in 24 days
4.6
4.6

With a career spanning over 14 years and 416 successful projects, I confidently offer myself as the best fit for this backend API integration job. Regardless of the domain or industry, my coding expertise has helped various businesses thrive through robust applications. From API Development to Backend and Database Management, I have extensive knowledge of cultivating smooth communication between client apps and databases, which is precisely your project's requirement. Throughout my career, I have worked on various open-source projects, including NGO-related developments. It’d be an honor to contribute to your open-source humanitarian tech initiative. Moreover, with my proficiency in Git-based workflow and experience working with Postman collections, I am confident in my ability to seamlessly adapt to your existing project and swiftly transform the backend to meet your specifications I believe in building solutions that endure the test of time and offer accessibility to all users. It would be a pleasure for me to bring these strengths into enhancing your C8 Coordinate platform, showcased at www.c8coordinate.com. For a dedicated developer committed to clean code, diligent documentation, and long-term collaboration let's come together on this project!
$25 USD in 40 days
4.4
4.4

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, Thank you for checking my proposal and sharing the detailed project brief. I can build your internal API endpoints for C’8 – Coordinate using Node.js with a secure and scalable design. I will deliver: • Fully working internal API endpoints based on existing specs • Inline documentation and a README for future contributors • Comprehensive unit tests for each endpoint • Deployment instructions for easy setup in any environment You will also receive: • Ongoing support for any queries or issues I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag.
$15 USD in 30 days
4.4
4.4

Hi, I can help complete the backend development for C’8 – Coordinate by implementing clean, reliable APIs that connect your existing frontend with the server and database layers. I have experience building scalable backend systems with well-structured endpoints, authentication flows, validation, documentation, testing, and deployment workflows using Git-based development practices. I will focus on delivering production-ready APIs that match your Postman specifications, include proper error handling and unit tests, and are easy for future contributors to maintain. I’m interested in contributing to open-source humanitarian technology and can help turn the existing interface into a fully functional platform. Regards, Jay
$20 USD in 40 days
4.4
4.4

Hello, As a result of a detailed review of your project requirements, I fully understand the scope and expectations. I have experience handling similar backend API development projects and I'm available to start your project right now. I bring deep expertise in Node.js, REST API Development, Backend Development, Database Management, Git, API Documentation, and Unit Testing with over 10 years of experience. One of the key challenges in projects like this is building reliable API layers that match the existing frontend requirements while keeping authentication, validation, database communication, and future open-source contributions clean and maintainable. I can implement the required endpoints based on your Postman specifications, add proper validation, write unit tests for key cases, and provide clear documentation and deployment instructions. I have a couple of quick questions. • What backend framework and database are currently used in the existing repository? • Are the authentication hooks already connected to a specific auth provider or should they be completed as part of the API implementation? I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Best regards, Carlos.
$15 USD in 40 days
4.1
4.1

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