Exhibition software & Support -- 2

@webbookstudio

Hi there, We understand you need to integrate your application with a mainstream CRM platform like Salesforce, HubSpot, or Zoho CRM, focusing on smooth data flow between the two systems using public REST APIs, webhooks, and OAuth-based authentication. With our experience in custom PHP development, including API integrations and OAuth authentication, we're confident in delivering a reliable and efficient integration. For example, we've worked on similar projects, such as integrating a learning platform with a custom CRM system using REST APIs and OAuth. We'll provide production-ready integration code, a setup guide, and test scripts to ensure seamless syncing of contacts, deals, and custom objects. Can you confirm which CRM platform you'll be using and if there are any specific requirements for the integration code or setup process? Feel free to message us to discuss the details! — Webbook Studio

@Rapha

Hi, I'm Rafael. As a PHP backend developer I'll implement a small middleware (Laravel/Lumen + Guzzle) to handle OAuth flows, webhooks, field mapping and rate-limit backoff. I'll deliver production-ready integration code, a concise setup & rollback guide, a Postman collection demonstrating each API call, and two weeks light support. To avoid duplicates and meet the <5-minute round-trip and 48-hour error-free window I'll use external-ID idempotency and last-modified checks for sync operations. Can you provide sandbox API credentials and a representative test dataset? Please contact me through Freelancer Let's discuss the project through Freelancer chat and work out the right timing and cost for the actual scope.

@SBITServices

Hi, I can handle the CRM integration with a clean, maintainable approach using REST APIs, webhooks, and OAuth. I’ll map the required contacts, deals, and custom objects, implement reliable two-way syncing, rate-limit handling, duplicate prevention, and lightweight error handling. I’ll also provide the setup/rollback guide and Postman collection or test script, then support the integration for two weeks after launch. I’m comfortable working with PHP and API-based integrations, and I’ll confirm the exact CRM, fields, authentication flow, and existing application stack before starting. Thank you Regards, Sai

@corpmember29

Hello, CRM Integration Specialist {{{ I HAVE CREATED SIMILAR BEFORE AND I CAN SHOW YOU }}} I have carefully reviewed your requirements for a clean, reliable CRM integration without unnecessary changes to the existing application. I have 11+ years of full-stack integration experience and can connect your application with Salesforce, HubSpot, Zoho CRM or the confirmed platform using REST APIs, webhooks and OAuth 2.0. I will handle field mapping, two-way synchronization, duplicate prevention, rate-limit handling, retries and lightweight error logging to ensure contacts, deals and custom objects remain consistent across both systems. I will keep the implementation modular and maintainable, with clear documentation and no unnecessary dependencies or feature changes. I will also provide a Postman collection/test script covering the required API calls and validate the integration through a proper 48-hour test window. The final delivery will include production-ready integration code/configuration, setup and rollback documentation, testing resources and post-go-live support. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. I can start immediately and provide regular progress updates. Thanks, Christina

@ozbas

Dear Client, I am keen to deliver a streamlined, production-ready integration between your application and the chosen CRM platform (Salesforce, HubSpot, or Zoho) utilizing their public REST APIs, OAuth authentication, and webhooks. My approach focuses on clean, maintainable code—whether developed in PHP or your preferred iPaaS—ensuring reliable bidirectional sync of contacts, deals, and custom objects with comprehensive error handling, rate-limit management, and prevention of duplicates. I will provide clear, concise documentation including a setup and rollback guide alongside a Postman collection or test script demonstrating each API interaction. To align perfectly with your requirements, I would appreciate confirmation of the CRM platform choice and any specific field mappings or constraints you envision. I prefer using PHP with Laravel or lightweight REST-focused frameworks, enabling modular, well-documented integration code that your team can easily maintain. I prioritize clear asynchronous communication via your chosen channels and will ensure all acceptance criteria—including sub-five-minute sync latency and zero unhandled errors over a 48-hour test—are rigorously met. Looking forward to collaborating for a swift, robust rollout. Best regards, Özgür

@toriquldev123

Hello There! I’m Md Toriqul Islam, an experienced full-stack developer specializing in REST API integrations, OAuth, webhooks, CRM automation, and reliable data synchronization. I understand you need a clean, documented integration between your application and a mainstream CRM such as Salesforce, HubSpot, or Zoho. I can handle field mapping, two-way sync, duplicate prevention, rate limits, error handling, and API testing while keeping the implementation lightweight and maintainable. My skills in REST APIs, OAuth 2.0, webhooks, Node.js, PHP/Laravel, Postman, and CRM integrations align well with your requirements. I prefer lightweight REST API implementations with Postman for testing and clear documentation. I’m ready to start immediately and provide post-go-live support. Looking forward to hearing from you. Best regards, Md Toriqul Islam

@InterconnectBPO

I can help streamline the integration between your application and the CRM platform to ensure seamless data flow. My focus will be on delivering a clean, efficient solution that adheres to your specifications. I understand the importance of using public REST APIs, webhooks, and OAuth-based authentication. I will ensure that all agreed fields sync automatically and meet the requirements outlined, including the round-trip time for data updates. With expertise in software integration and experience with mainstream CRMs like Salesforce and HubSpot, I can provide production-ready code, a concise setup guide, and a test script to validate the integration. Regards, Jp

@webbookstudios

Hi there! I'm Markiyan, a full stack developer and CEO of a web agency, and I'd love to help you integrate your application with a CRM platform. I understand you need a seamless connection between your app and a mainstream CRM like Salesforce, HubSpot, or Zoho CRM, using their public REST APIs, webhooks, and OAuth-based authentication. My team and I have experience with similar integrations, including custom PHP development and API integrations. I can deliver a production-ready integration code, a concise setup guide, and a test script demonstrating each API call. We'll ensure that contacts, deals, and custom objects sync reliably both ways, with no duplicates and under five minutes round-trip time for data updates. One question: are there any specific iPaaS or SDKs you'd prefer us to use for this integration, or would you like us to suggest some options based on our experience? Feel free to message me to discuss the details! — Markiyan

@protovosolutions

Hello, We would be glad to assist you with your CRM requirements. Protovo Solutions LLP has strong experience in CRM implementation, customization, integration, migration, and custom module development. Since 2016, we have worked with businesses across different industries to improve their sales, customer service, project management, and internal workflows. Our CRM expertise includes: • Salesforce • Zoho CRM • PerfexCRM • RISE CRM • Odoo CRM • Custom CRM development We can assist with CRM setup, custom modules, workflow automation, dashboards, reports, user roles, API integrations, data migration, third-party integrations, bug fixing, performance improvements, and ongoing technical support. Our team works with PHP, Laravel, CodeIgniter, Node.js, React, Python, MySQL, REST APIs, and related technologies. This allows us to customize existing CRM platforms or develop a complete CRM solution based on specific business requirements. Protovo has been serving global clients since 2016 and has earned more than 100 client reviews on Freelancer. Please connect with us through chat. We can review your requirements and share relevant CRM experience before moving forward. Kind regards, Protovo Solutions LLP

@denisSolution

Hi, I'm Denis, and I’ve built integrations between applications and CRMs like Salesforce and HubSpot before, so I understand the balance between moving data smoothly and keeping things clean in production. The core challenge here is mapping fields accurately between your system and whichever CRM we land on, while handling OAuth, rate limits, and webhooks without introducing duplicates or long delays. I’ll start by reviewing the exact CRM API, then design a lightweight sync layer that retries failed calls and logs errors so we can catch issues early. A small setup guide and Postman tests will make rollback and troubleshooting straightforward. The biggest risk is usually unexpected field mismatches or API limits, so I’ll add a simple circuit breaker to pause syncs briefly if we hit thresholds. Once the first sync runs cleanly, I can tighten timing and adjust retries before the 48-hour test. I can start working right away. Let's connect and discuss the details. Thanks, Denis.

@krupnovdenis

Hello! We can set up the CRM integration and keep it clean and well documented. 1. Which CRM should we connect first? 2. Do you already have the field mapping and access details? — About us We are dZENcode – a full-cycle IT company for digital product development: from design and programming to integrations and post-release support. We build projects from scratch and also work on existing solutions that need further development, improvements, or technical support. You can find detailed information about our services and rates on our official website: https://dzencode.com. Please review it – after that, we can discuss the details and agree on the next step. ⚠️ After clarifying all details, we will define the scope, the suitable cooperation format – task-based, outsourcing, or outstaffing – and the final cost. Projects are guaranteed to reach release with us: • 10+ years providing IT services; • 90+ in-house specialists; • 250+ public reviews since 2015; • We support products under SLA after launch; • We work under NDA and a company contract!

@Tanmoy236

Greetings! I’m an expert in CRM API integrations, OAuth, webhooks and bidirectional data synchronization, with 9+ years of experience across modern application stacks. Here’s how I can help: • Integrate Salesforce, HubSpot or Zoho via REST APIs/OAuth • Map contacts, deals and custom objects with duplicate prevention • Implement webhooks, rate-limit handling and lightweight error recovery • Test round-trip syncing and provide a Postman collection • Deliver setup/rollback documentation and two weeks of support Which CRM are you leaning toward? What language is the existing application built with?

@FizzaNadeemK

Hello, I understand you need a clean CRM integration using REST APIs, webhooks, and OAuth, with reliable two way syncing for contacts, deals, and custom objects without adding unnecessary features. I can build the integration with clear field mapping, duplicate prevention, rate limit handling, error management, and proper API testing. I’ll also provide maintainable documentation, setup and rollback instructions, and a Postman collection for validation. I can start immediately and would be happy to discuss the CRM choice, current application, and required data mappings. Best Regards, Fizza

@shayankhan333

Two-way CRM sync usually breaks on the same thing: the loop. Without an "updated by integration" flag or external ID check, a push from your app triggers a webhook that writes back and pings again. I'll build the OAuth flow, field mapping and webhook handlers in Node, with idempotent upserts by external ID and a Postman collection covering each call. 1) Salesforce, HubSpot or Zoho, and sandbox available? 2) Which custom objects, and is the app's side REST or DB-level? Cheers Shayan

@emilesd617

Hi, I am a backend and API integration developer with 8 years of rich experience in software development, with a background in CRM integrations, REST APIs, OAuth authentication, webhooks, and reliable data synchronization. I am familiar with PHP, REST API development, API integration, Salesforce, HubSpot, Zoho CRM, OAuth, webhooks, field mapping, and error handling. For your CRM integration, I can connect the application through the CRM's REST APIs and OAuth flow, map the required contacts, deals, and custom objects, and implement webhook based synchronization with duplicate prevention and lightweight retry handling for rate limits or temporary failures. I can also provide a clean setup and rollback guide along with a Postman collection for testing and support the integration after go live. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.

@mayankinnovative

Hi there I can help develop and support your exhibition software with a reliable system for managing exhibitors visitors bookings and event operations My approach 1 Exhibition Management Manage events exhibitors booths packages registrations schedules and other event information 2 Exhibitor Portal Provide exhibitors with an easy dashboard to manage profiles bookings documents and requirements 3 Visitor Management Handle visitor registration tickets check in badges and attendance records if required 4 API Integration Connect the software with your existing website CRM payment gateway email SMS or other services 5 Admin Dashboard Give administrators control over exhibitors registrations payments reports and event settings 6 Ongoing Support Handle bug fixes updates performance improvements and new features as the exhibition requirements evolve I have worked with web applications APIs dashboards databases and business management systems with multiple user roles and workflows Quick questions to get started 1 Is the exhibition software already developed or should I build new features from scratch 2 Which technology stack and database is currently being used 3 Which parts of the system need support or improvement first 4 Do you need integrations with payment gateways CRM email or SMS services 5 Is this for one exhibition or a reusable platform for multiple events Once I have these details I can review the existing system. Thanks

@jazz78p

Hola, soy Leo Sarmiento, desarrollador especializado en integración de sistemas con más de 10 años de experiencia en APIs REST, webhooks y OAuth. En una sincronización bidireccional con un CRM, lo que decide la calidad no es conectar las dos APIs —eso es lo directo—, sino evitar el problema clásico del sync en ambos sentidos: el "eco", donde un cambio va de tu app al CRM, el webhook lo devuelve, y termina duplicando el registro o entrando en loop. Resolver eso con idempotencia y detección del origen del cambio es justo lo que garantiza tu criterio de "sin duplicados". A eso sumo el manejo de rate limits con reintentos y backoff, y un mapeo de campos cuidado para contactos, oportunidades y los objetos personalizados. Trabajo en el stack que mejor puedas mantener vos, y entrego el código listo para producción, una guía concisa de configuración y reversión, y una colección de Postman que demuestra cada llamada. Un punto que conviene cerrar: cuál de los CRM será, porque Salesforce implica bastante más trabajo (governor limits, SOQL) que HubSpot o Zoho, y eso ajusta el estimado. Podemos confirmar ese punto y las suposiciones a validar por el chat de Freelancer antes de arrancar.

@rosscarter1011

Hello, Exhibition software syncing to Salesforce or HubSpot via OAuth must handle token refresh and rate limits before any field mapping begins. CRM integrations for live events fail most often when webhooks arrive during API throttling windows and duplicates slip through. I'd start by building the OAuth handler and a deduplication layer with retry logic, then map contacts and deals against your confirmed CRM schema. This bounded slice delivers a tested sync pipeline with Postman collection and rollback guide within seven days. There is comparable integration work on my profile. Do you already have OAuth client credentials provisioned, or should I document the app registration steps as part of the setup guide? Share your current data model and I will draft the field map before we begin. Thanks,

@pasion0128

★•══•★ Hi client ★•══•★ I’m comfortable working with mainstream CRMs like Salesforce, HubSpot, or Zoho and have solid experience handling REST APIs, webhooks, and OAuth. My approach is to keep the integration clean and lightweight, focusing on smooth data flow with no duplicates and quick sync times. I’ll write clear, maintainable code plus a simple setup/rollback guide and a Postman collection for easy testing. I’m used to catching rate limits and errors early to avoid surprises during the 48-hour test window. Communication-wise, I prefer Slack or email for async updates—whatever suits you best. What’s your preferred language or platform for the integration? Happy to align on that before diving in. Best regards, Rico