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My organisation runs a custom-built CRM that now needs to sit at the centre of everything we do. I need an expert who can design and implement a robust API layer that will: • Keep data perfectly in sync, in real time, between the CRM and our ERP, marketing automation stack, customer-support platform, and any future systems we add. • Trigger and manage cross-platform workflows so actions in one tool automatically cascade to the others. • Feed clean, consolidated data into our reporting engine to give us up-to-the-minute dashboards and audit trails. You will own the full integration cycle—from mapping data models and crafting secure REST/GraphQL endpoints, through authentication (OAuth2/JWT), error handling, logging, and versioning, all the way to automated tests and deployment documentation. A Postman (or similar) collection, clear README, and a short hand-over session form part of the final deliverable. Proven experience integrating “other” or bespoke CRMs with ERP, marketing, and support systems is essential; please reference comparable projects and outline the toolset you prefer (Node, Python, Java, middleware like Mulesoft or Zapier, etc.). I value clean, well-commented code, sensible architecture, and a collaborative approach to scoping milestones, so let’s discuss your recommended plan of attack and expected turnaround time.
Project ID: 39752736
123 proposals
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Active 7 mos ago
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123 freelancers are bidding on average $1,160 USD for this job

I am an experienced API integration specialist with expertise in designing and implementing robust API layers. I excel in keeping data perfectly in sync in real time between CRMs, ERPs, and marketing automation stacks. My approach includes triggering and managing cross-platform workflows, feeding clean data into reporting engines, and crafting secure REST/GraphQL endpoints. I prioritize clean, well-commented code, sensible architecture, and a collaborative approach to scoping milestones.
$750 USD in 7 days
8.3
8.3

Hi, As an expert, I think that I can help you to complete this project 100% perfectly sure to satisfy your requirement. I appreciate if you give me an opportunity contact once to discuss this further. I would love to build an awesome working relationship with you using my expertise.
$500 USD in 7 days
7.6
7.6

Hello, The nature of your project is tailor-made for my technical expertise and skills in Java and Python. With our proficiency in crafting and implementing robust APIs, designing clean architecture, and ensuring reliable authentication methods like OAuth2/JWT, we can work together to ensure that your CRM becomes the backbone of your entire organization. Our experience in integrating complex CRM systems with various other platforms, such as ERP, marketing automation stacks, and support systems would be a great asset for you. Specifically speaking to your project request, we've been involved with similar projects where we have successfully integrated custom-built CRMs with multiple other platforms. On top of all this, I would like to place a special emphasis on the collaborative approach you mentioned in scoping milestones and delivering your expected turnaround time within the agreed-upon timeline. We value clear communication and strive to provide automated tests, deployment documentation alongside quality deliverables. By choosing Live Experts®, you're opting for a seasoned team to take charge of your project and ensure up-to-the-minute dashboards and audit trails for your organization's growth. Thanks!
$750 USD in 6 days
7.4
7.4

Hello, I am excited about the opportunity to help your organization integrate a robust API layer for your custom-built CRM. My understanding is that you need a seamless, real-time data synchronization between your CRM and various platforms like ERP, marketing tools, and customer support systems. I will approach this by first mapping the data models accurately, ensuring clean data flow and effective error handling. I prioritize writing clean, well-documented code and will use tools like Node.js and OAuth2 for secure authentication. Furthermore, I will deliver a comprehensive Postman collection and a clear README for an easy handover session. I believe collaborating closely on scoping milestones will ensure a smooth integration process and I am eager to discuss my recommended strategy and turnaround time further. What specific existing systems do you plan to connect to the CRM, and are there any particular challenges you've faced with those integrations so far? Thanks, Shamshad
$750 USD in 28 days
7.4
7.4

With over a decade of experience in the software industry, my team at STR Softwares LLP is well-equipped to handle your CRM API integration project. We have worked on numerous projects involving CRM-ERP, CRM-marketing, and CRM-support system integrations similar to your requirements. We primarily employ Python and middleware solutions like Mulesoft, but we're open to discussing and adapting our technology stack based on your specific needs. As elite Python developers, we have deep knowledge and hands-on experience with Django, Flask, and FastAPI frameworks that will be invaluable in mapping your data models and crafting robust REST/GraphQL endpoints. Additionally, our skills in data engineering will ensure that your data remains in perfect sync across all integrated systems, feeding clean consolidated information into your reporting engine for up-to-the-minute dashboards. At STR Softwares LLP, clean code and sensible architecture are paramount to us. Our well-documented processes include automated tests as well as comprehensive deployment documentation – ensuring a seamless transition post-project. I assure you of my commitment to client satisfaction through the technical excellence my team brings to the table – putting my 24/7 communication availability to use for you by providing updates transparently throughout the project's lifecycle.
$500 USD in 7 days
7.2
7.2

I’m Paul, an experienced software engineer specializing in integrating complex systems. I believe my background in building AI-powered applications and a firm understanding of clean, well-commented code sets me apart as the ideal candidate for your CRM API integration project. Not only will I ensure seamless real-time data synchronization between your custom CRM and all other platforms; I will also design and implement a robust API layer that delivers cross-platform workflows, accurate reporting, and clean consolidated data. Spanning from concept to deployment, I can handle the nitty-gritty details such as mapping data models, authentication (OAuth2/JWT), automated tests and deployment documentation that this project requires. My proficiency in Java, Node.js, and Python additionally positions me well to smoothly integrate your bespoke CRM with your ERP, marketing automation stack, customer-support platform while ensuring clean databases and real-time processing for accurate reporting. Let's bridge the gap between CRMs and other systems together efficiently.
$500 USD in 7 days
6.9
6.9

Hi there, I’ve gone through your project and would be glad to help. With 10+ years of experience in Node.js, I specialise in building fast, scalable, and secure backend systems and RESTful APIs. You’ll get clean architecture, real-time performance, and clear communication throughout the process. Let’s connect and take your project forward! Best, Bhargav Node.js Developer | 10+ Years Experience
$500 USD in 7 days
6.8
6.8

Hi, As a seasoned Full Stack Developer and API integration expert, I believe I am the perfect fit to help with your CRM project. Over the years, I have successfully designed and implemented robust API layers that have kept data in sync and triggered cross-platform workflows for various clients. Importantly, I have integrated bespoke CRMs with ERP, marketing, and support systems before; even building web-based ERP systems. In terms of my preferred toolset, I have strong proficiency in Python utilizing frameworks like Django for web development and creating RESTful and GraphQL endpoints. I also have experience working with Node.js. To ensure your system is foolproof, I don't leave anything to chance and employ a comprehensive authentication method (OAuth2/JWT), extensive error handling, robust logging, versioning, automated testing, and deployment documentation to cover all bases. One of my defining qualities is my dedication to clean coding practices and sensible architecture—traits you mentioned were important. Moreover, I understand the value of collaboration in achieving project milestones effectively; which makes me open and eager to discuss your recommended plan of attack and envisioned turnaround time. It's about turning your vision into a reality using cutting-edge technology, let's do this together! Thanks...
$500 USD in 7 days
6.8
6.8

Hello, I came across your project and found it truly interesting. With over eight years of hands-on experience in this field, I have successfully delivered high-quality solutions to clients worldwide. My dedication to excellence is reflected in the 180+ positive reviews from satisfied clients. I’d love to bring this expertise to your project and ensure outstanding results. However, I do have a few important points I’d like to clarify to align perfectly with your vision. Let’s connect via chat, where I can also share relevant examples of my past work. I'm looking forward to hearing back from you! Best Regards, Divu.
$700 USD in 8 days
6.4
6.4

Hello, As a seasoned Full Stack Java Developer and Cross-Platform Developer, I am well-prepared to handle your comprehensive CRM API integration project. With my extensive experience in not only Java, but also GraphQL, Node.js, and Python, I bring a versatile skill set to the table that fits perfectly with the requirements of this project. Over the course of my career, I have successfully integrated numerous "other" or bespoke CRMs with ERP, marketing, and support systems - a track record that makes me confident I can deliver exceptional results for your organisation. One aspect I prioritize highly is clean, well-commented code and sensible architecture - qualities that are crucial in delivering scalable, high-performance applications. These attributes will be incredibly significant for the seamless syncing of data across multiple platforms and systems in real-time, which your project demands. Lastly, my expertise isn't just limited to coding; I excel at understanding business needs and translating them into technical solutions. I intend to maintain a collaborative approach with you throughout the whole integration process- always eager to discuss scoping milestones and your preferred plan of attack. Let's work together to accomplish your desired turnaround time while ensuring an output that encompasses precisely what you envision; a comprehensive API layer facilitating efficient data syncing between all your business systems Thanks!
$555 USD in 1 day
6.1
6.1

Hi, I specialize in building robust API layers that put custom CRMs at the center of real-time, enterprise integrations. I’ve delivered CRM↔ERP/marketing/support sync using Node.js (NestJS) and Python (FastAPI) with REST/GraphQL, OAuth2/JWT, and typed contracts (OpenAPI/SDL). The core challenge is low-latency bi-directional sync without duplication or drift while orchestrating cross-tool workflows and preserving an audit trail. I propose an event-driven design (Kafka/RabbitMQ) with webhooks and CDC (Debezium/transactional outbox), idempotency keys, and SAGA orchestration for consistency. Endpoints will be versioned and secured with RBAC, rate limiting, and mTLS; failures handled via retries/backoff, circuit breakers, and dead-letter queues. Observability will include structured logging, OpenTelemetry traces, and metrics, feeding a consolidated reporting stream you can trust. Deliverables include clean, well-commented code, automated unit/integration/contract tests (Pact), a Postman collection, and a clear README plus hand-over. Thanks, Hercules
$500 USD in 7 days
5.9
5.9

Hi there, I checked your requirements and guarantee you that i have relevant experience in Python,AI and data science it's gonna be done within the highest quality . Let's contact via chat so that I can start work immediately
$475 USD in 1 day
5.8
5.8

Hi riseuprealtyaz, We’ve built custom CRMs that integrate with multiple platforms like ERPs, marketing tools, and support systems. For one client, we developed a CRM that connected with 10+ external systems, enabling automated workflows and real-time data synchronization. We can use tools like Zapier or Integromat for quick integrations, but we prefer building dedicated APIs for better reliability and control. With our approach, you get a fully optimized solution that’s more robust than a middleware-dependent one. Let’s schedule a 10-minute call to discuss your project in detail and see if I’m the right fit. I usually respond within 10 minutes. Best regards, Adil
$250 USD in 40 days
5.8
5.8

Dear Client, As a team at WellSpring Infotech, we understand the value of a well-integrated CRM system that can streamline operations across various platforms. Our decade-long experience specifically in integrating “other” or bespoke CRMs with ERP, marketing and support systems, aligns with the needs of your project. The thoroughness in our approach to mapping data models and crafting secure REST/GraphQL endpoints, along with professional implementation of authentication, error handling and logging makes us a strong choice for this project. We are well-versed in choice technologies like Node.js and Python, as well as in middleware tools such as Mulesoft and Zapier, which empowers us to find the best-fit solution for every project’s unique requirements. Moreover, we prioritize clean code and sensible architecture for better maintenance, which is crucial for long-term success of any system. Our expertise extends beyond simply delivering functional software; we also offer comprehensive project management and quality assurance solutions to ensure that our partner's objectives are met, all glitches addressed, timely milestones achieved, and documentation is thorough. Most importantly, our commitment to collaboration ensures constant communication about progress and scoping so that you have complete visibility into the project. Choose us for a successful integration that unifies all your systems under one umbrella while maintaining the highest level of security!! Thank you!!!
$750 USD in 7 days
5.5
5.5

Hello, Are you ready to transform your custom-built CRM into the beating heart of your organization? By leveraging my proven expertise in seamless API integrations using Node.js and Python, I will design a robust layer that synchronizes your systems in real-time while ensuring clean, consolidated data feeds for your reporting engine. Let's schedule a call to discuss your needs and my strategic plan for a successful integration. Best, Smith
$500 USD in 7 days
5.5
5.5

Hello, I can design and implement a secure API layer for your custom CRM that syncs data in real time with your ERP, marketing automation, and support systems. The integration will handle cross-platform workflows, feed consolidated data into reporting, and include authentication (OAuth2/JWT), error handling, logging, and versioning. Deliverables will cover automated tests, deployment documentation, and a Postman collection for easy handover. Questions: – Do you prefer REST, GraphQL, or a hybrid approach for the API endpoints? – Which ERP, marketing, and support platforms are top priority for initial integrations? Let’s connect to outline the architecture and milestones so I can provide a clear plan and turnaround estimate. Looking forward to potentially working together on this project. Thanks and Best regards, Kamran
$250 USD in 5 days
6.4
6.4

Hi there, I'm Ahmed Hassan, a Senior Full-Stack Engineer based in California with over 15 years of hands-on experience in web and mobile application development. After reviewing your job posting, I’m confident that my background aligns closely with your project requirements and enough qualified for your project - Comprehensive CRM API Integration. I’ve successfully delivered SIMILAR projects in previous roles—both as a senior developer and project manager—ensuring secure, scalable, and user-friendly systems tailored to business goals. I’d love the opportunity to discuss how I can contribute to your project’s success. Looking forward to connecting. Best regards, Ahmed Hassan
$500 USD in 6 days
4.9
4.9

⭐ Hi, My availability is immediate. I read your project post on Comprehensive CRM API Integration. We are experienced full-stack Python developers with skill sets in - Python, Django, Flask, FastAPI, Jupyter Notebook, Selenium, Data Visualization, ETL - React, JavaScript, jQuery, TypeScript, NextJS, React Native - NodeJS, ExpressJS - Web App Development, Data Science, Web/API Scrapping - API Development, Authentication, Authorization - SQLAlchemy, PostegresDB, MySQL, SQLite, SQLServer, Datasets - Web hosting, Docker, Azure, AWS, GPC, Digital Ocean, GoDaddy, Web Hosting - Python Libraries: NumPy, pandas, scikit-learn, tensorflow, etc. Please send a message So we can quickly discuss your project and proceed further. I am looking forward to hearing from you. Thanks
$630 USD in 11 days
5.3
5.3

Hello, Your CRM project aligns perfectly with our technical expertise in Java and Python development. We specialize in building robust APIs, designing clean architecture, and implementing secure authentication methods like OAuth2/JWT to ensure your CRM becomes a scalable backbone for your organization. Our capabilities include: Seamless integration with ERP, marketing automation, and support systems. Collaborative milestone planning to meet your timeline and deliverables. Automated testing, deployment documentation, and quality assurance. Real-time dashboards and audit trails to support organizational growth. With proven experience in custom CRM integrations, we prioritize clear communication and tailored solutions. Let’s discuss how Live Experts® can bring your vision to life efficiently and effectively. Best regards,
$500 USD in 5 days
4.9
4.9

Hi there,Good afternoon I am Talha. I have read you project details i saw you need help with Python, Node.js, GraphQL, Zapier, OAuth, API Development, Java and RESTful API I am pleased to present my proposal, highlighting our extensive experience and proven track record in delivering exceptional results. Our portfolio of success will showcase past projects that demonstrate our ability to meet and exceed client expectations. Glowing testimonials from satisfied clients will attest to our professionalism, dedication, and the quality of our work Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan
$250 USD in 12 days
5.0
5.0

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