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We are seeking a Senior Developer with extensive experience in the Bitrix24 platform and Twilio infrastructure to execute Phase 1 of our automated customer service system for a real estate agency. The objective of this phase is to structure the CRM, optimize workflows, and integrate a single corporate number via Twilio that manages traditional telephony, SMS, and the official WhatsApp Business API (WABA). Scope of Work (Phase 1): 1. Bitrix24 Optimization and Automation: ◦ Configuration and cleanup of the sales funnel (Leads, Deals, Contacts). ◦ Creation of automation rules (triggers and actions) based on customer behavior and stage changes within the CRM. 2. Telephony Integration with Twilio: ◦ Configuration of a Twilio number within Bitrix24 to make and receive calls directly from the CRM. ◦ Implementation using Elastic SIP Trunking to ensure call recording and system scalability. 3. Official WhatsApp Business (WABA) and SMS Integration via Twilio: ◦ Configuration of the official WhatsApp Business API (Cloud API) within the Twilio console, connected to Bitrix24. ◦ Connection to the Bitrix24 CRM Marketing module to enable the secure, bulk sending of Meta-approved WhatsApp templates and SMS campaigns. ◦ Enabling the multi-agent feature so that our advisors can engage in two-way chat directly from the Bitrix24 dashboard using the official line. Critical Scalability Requirement (for the future Phase 2): The Twilio architecture and Bitrix24 webhooks must be structured in a clean, open, and native manner (via REST API). The use of closed applications or third-party patches from the marketplace that limit code control will not be accepted. In Phase 2, this same Twilio number and infrastructure will be connected to external Artificial Intelligence agents for voice (Retell AI) and chat (Botpress). The work delivered in this Phase 1 must leave the "pipeline" ready and open to receive these connections without requiring any restructuring of the CRM. Freelancer Requirements: • Demonstrable and proven experience working with the Bitrix24 REST API. • Advanced proficiency with the Twilio Console (SIP Trunking, Messaging Services, and integration with Meta Business Manager). • Ability to deliver the project with clean code and technical documentation of the implemented connections.
Project ID: 40459581
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Hey there, Bitrix24 and Twilio integrations fail later when the CRM structure is built around marketplace apps instead of clean REST architecture. Your Phase 2 requirement with Retell AI and Botpress makes that part critical from day one. I can handle the full Phase 1 setup with a native scalable approach using Bitrix24 REST API webhooks and Twilio services directly without closed plugins or patchwork integrations. My focus would be: • Cleaning and structuring Leads Deals and Contacts pipelines inside Bitrix24 • Building automation triggers tied to customer actions and deal stages • Configuring Twilio Elastic SIP Trunking for inbound outbound calls call recording and scalability • Connecting the official WhatsApp Business API and SMS through Twilio Messaging Services • Enabling multi agent conversations directly inside Bitrix24 Open Channels and CRM Marketing • Keeping the infrastructure open for Retell AI voice agents and Botpress chat integrations in Phase 2 without rebuilding workflows later You will also receive clean technical documentation for APIs webhooks messaging flows and Twilio configurations. Let’s review your current Bitrix24 structure and Twilio setup so I can map the cleanest architecture before implementation starts. Best, Saad
$275 USD in 7 days
1.4
1.4
77 freelancers are bidding on average $273 USD for this job

Hi - Elias here from Miami. The primary challenge in integrating Bitrix24 and Twilio lies in handling the real-time data flow and ensuring reliable message delivery. Common pitfalls include improper API rate limiting, leading to throttling issues, and inadequate error handling, which can cause data loss during high-load situations. A robust architecture should consider asynchronous processing to decouple the service calls. Using queues (like RabbitMQ) can help manage load and ensure messages are processed reliably. It’s critical to implement retries and fallbacks for Twilio API calls to prevent failures from cascading through your application. The integration flow should look like this: Incoming Call → Twilio Webhook → Bitrix24 API Call → Response Handling. Ensuring state management throughout this flow will be vital, especially for tracking ongoing conversations and user actions. A key risk is the handling of edge cases, such as network failures or API downtime. Addressing these early by implementing circuit breakers and fallback mechanisms will enhance system resilience. What specific use cases are you targeting with this integration? Understanding this will help refine the solution. Looking forward to discussing this further.
$300 USD in 2 days
8.2
8.2

I have strong experience with Bitrix24 REST API and Twilio infrastructure, and can deliver a clean scalable Phase 1 setup with CRM automation, SIP/WABA/SMS integration, and full technical documentation ready for seamless Phase 2 AI integrations.
$275 USD in 7 days
6.3
6.3

Hello, I can help execute Phase 1 for your Bitrix24 and Twilio setup, including CRM cleanup, lead/deal/contact workflow automation, SIP trunking for calls and recordings, and secure SMS/WABA integration through Twilio. I have strong experience with REST API based CRM integrations, Twilio messaging/telephony flows, webhooks, and building clean structures that stay open for future AI voice and chat connections like Retell AI and Botpress. I will avoid closed marketplace patches and keep the implementation native, documented, and scalable so your advisors can manage calls and two-way WhatsApp/SMS conversations directly from Bitrix24. I am ready to begin immediately and would be happy to discuss the project in further detail. Thanks, Teo
$305 USD in 34 days
6.5
6.5

You need a Bitrix24-Twilio integration that leaves the CRM and telephony pipeline open for future AI agents in Phase 2. Here’s how I’ll deliver it: - Bitrix24 setup will focus on native REST API calls for funnel automation, avoiding marketplace plugins. I’ll structure leads, deals, and contacts with custom fields that map directly to Twilio’s call/SMS metadata, ensuring clean handoffs to Phase 2’s AI tools. - Twilio integration will use Elastic SIP Trunking for scalability, with call recording stored in Bitrix24 via webhooks. The WhatsApp Business API (Cloud) will connect through Twilio’s Messaging Services, with template approvals handled via Meta Business Manager. - Multi-agent chat will route through Bitrix24’s Open Channels module, using Twilio’s conversation service for thread persistence. All connections will be documented with Postman collections and a runbook for Phase 2’s AI team. I’ll complete the work in 7 days for $350, covering the scope as written; we’ll refine the figure once we walk through the missing details. Let’s schedule a 15-minute call to align on the CRM’s current state and Twilio account permissions.
$305 USD in 7 days
6.6
6.6

Hi, I can help structure and optimize your Bitrix24 + Twilio infrastructure with a clean REST-based architecture ready for future AI integrations like Retell AI and Botpress. Experienced with CRM automations, Twilio telephony/WABA integrations, SIP setup, webhook architecture, and scalable API-driven workflows without relying on restrictive third-party patches. Clean implementation, documentation, and long-term scalability focused.
$200 USD in 1 day
6.1
6.1

Greetings! I’m a senior CRM and communications systems developer with 9+ years of experience working with Bitrix24 REST API, Twilio infrastructure (SIP, SMS, WhatsApp Business API), and scalable automation architectures for real estate and service-based CRMs. Here’s how I can help: * Structure and optimize your Bitrix24 CRM (Leads, Deals, Contacts) with clean funnel logic and automation triggers * Build CRM-based workflows using Bitrix24 REST API for stage-based automation and customer behavior routing * Configure Twilio SIP Trunking for in-CRM voice calls with recording, scalability, and logging * Integrate Twilio WhatsApp Business API + SMS with Bitrix24 for two-way communication and template-based campaigns * Enable multi-agent messaging inside Bitrix24 using a single unified corporate number * Architect the system with clean REST/webhook design so Phase 2 AI integrations (Retell AI, Botpress) can plug in without rework * Deliver full technical documentation of APIs, webhooks, and workflow logic for future scalability I focus on building “integration-first” systems—meaning your Phase 1 setup will be stable, modular, and fully prepared for AI voice/chat expansion without structural changes later. Before starting, can you confirm whether your Bitrix24 plan is Cloud or Self-Hosted, and if your Twilio account already has WhatsApp Business API approval active?
$275 USD in 7 days
5.9
5.9

Hello! I am a Florida-based senior software engineer with over 15 years of experience, specializing in PHP, API integrations, and automation solutions. I carefully read your project description for the Bitrix24-Twilio integration and I’m excited about the opportunity to contribute. To better understand your needs, could you please clarify the following questions? 1. What specific functionalities are you looking to achieve with the Bitrix24 and Twilio integration? 2. Are there particular timelines or milestones you have in mind for this project? My extensive background includes designing scalable systems and integrating various platforms seamlessly. I’ve successfully worked on similar projects, including automated CRM solutions and VoIP systems. I believe the goal of this integration is to enhance communication efficiency and streamline workflows, which aligns perfectly with my expertise. To ensure a successful outcome, I propose starting with a thorough assessment of your current setup, followed by a detailed implementation plan that includes testing and feedback phases. This will ensure that all functionalities work as intended and meet your objectives. I’m committed to delivering high-quality results and would love to discuss how I can assist with your project further. Looking forward to your response! -James
$300 USD in 2 days
5.2
5.2

Hi, We will configure your Bitrix24 CRM (funnel cleanup, automation rules) and integrate Twilio for calls via Elastic SIP Trunking, SMS, and official WABA, all through REST API and webhooks with no marketplace plugins. Every webhook and Twilio Studio flow will be structured so Phase 2 connections (Retell AI, Botpress) plug directly into the existing pipeline. A couple of quick things to confirm: 1) Is your Twilio number already registered, or do we provision a new one? 2) Do you have Meta Business Manager verified for WABA approval? The number quoted here is a starting estimate. The exact cost and timeline will be confirmed after we go through the full scope together. Looking forward to discussing further. Best regards, Faizan
$220 USD in 10 days
5.3
5.3

Hello, I’m excited to take on Phase 1 of your Bitrix24-Twilio integration for the real estate agency and I’m confident we can structure the CRM and unify telephony, SMS, and WhatsApp through a single Twilio number. My approach is to leverage the Bitrix24 REST API to clean up Leads, Deals, and Contacts, then implement robust automation rules that trigger on stage changes and behavior signals to keep the funnel flowing smoothly. Next, I’ll configure a Twilio number in Bitrix24 with Elastic SIP Trunking to support scalable calls with reliable recording, and I’ll wire in the WebRTC/VoIP paths to the CRM for seamless agent experience. I’ll also connect the WhatsApp Business API via Twilio to the Bitrix24 Marketing module and enable secure bulk messaging alongside SMS campaigns, with multi-agent chat available directly from the dashboard. For Phase 1, I’ll deliver clean, REST-based connections and comprehensive documentation so the pipeline remains open to Phase 2 integrations with AI voice and chat agents without restructuring the CRM. This includes a clear, modular codebase and thorough workflow configurations that are ready for future scaling. I’m ready to start and can propose a detailed timeline with milestones once we align on the exact lead times and acceptance criteria. Best regards,
$305 USD in 13 days
4.9
4.9

Hey there, I'm Vishal Maharaj, a seasoned developer with 25 years of experience in PHP, API, Automation, REST API, Asterisk PBX, Twilio, and VoIP, based in Perth, Australia. I understand the requirements of your project for integrating Bitrix24 with Twilio to enhance your real estate agency's customer service system. My approach would involve optimizing Bitrix24 workflows, setting up Twilio telephony integration, and configuring the WhatsApp Business API for seamless communication. Let's discuss further details and kick off this project. Feel free to initiate the chat. Cheers, Vishal Maharaj
$350 USD in 5 days
5.1
5.1

Hello, I have strong experience with Bitrix24 REST API integrations, Twilio Voice/SMS infrastructure, SIP Trunking, and WhatsApp Business API implementations for scalable CRM systems. For Phase 1, I can help you: • Optimize and restructure Bitrix24 CRM pipelines (Leads, Deals, Contacts) • Build automation rules, triggers, and workflow actions • Configure Twilio telephony inside Bitrix24 for inbound/outbound calls • Implement Elastic SIP Trunking with call recording and scalable architecture • Integrate official WhatsApp Business API (WABA) and SMS via Twilio • Enable multi-agent two-way communication directly from Bitrix24 • Configure CRM Marketing for approved WhatsApp templates and SMS campaigns I fully understand your requirement to avoid closed marketplace apps or restrictive third-party solutions. The implementation will use clean REST APIs, native webhooks, and documented integrations to keep the infrastructure open for future AI integrations with Retell AI and Botpress in Phase 2. I can also provide technical documentation for all implemented connections and workflows. Looking forward to discussing your current setup and project timeline. Best regards
$275 USD in 3 days
5.1
5.1

With a decade of experience and a specialized focus on automation and CRM systems, my team at Web Crest have the in-depth knowledge of both Bitrix24 and Twilio that your project requires. From cleaning up the sales funnel to configuring the official WhatsApp Business API, we are well-versed in all aspects of the integration your real estate agency needs. We understand the value of optimization and automation, and we always keep the scalability requirement in mind as evidenced by our clean, RESTful API-coded approach. Additionally, our command over AI technologies places us in a unique position to execute not just Phase 1 but also Phase 2 without requiring any restructuring of the CRM. As you plan for future expansion with external Artificial Intelligence agents for voice and chat capabilities, we can seamlessly connect Retell AI and Botpress to your existing setup. Our solutions are crafted for growth while maintaining high performance, which aligns perfectly with your project needs.
$200 USD in 7 days
4.8
4.8

Hello, I am available now. I have read your project description carefully and I understand what you want. 300% Confidence!!! I have 7+ years of experience in CRM, PHP. I have completed similar projects. Please contact me. Best regards, Steven
$280 USD in 7 days
4.5
4.5

Hi, I recently worked on a CRM-first telephony setup where Twilio SIP Trunking, WhatsApp Business API, and CRM automations were connected through REST webhooks instead of marketplace plugins. The architecture was designed specifically so future AI voice/chat agents could attach to the same messaging pipeline without restructuring the CRM. A close public example is, which uses scalable SIP infrastructure, multi-agent communication routing, CRM synchronization, and webhook-driven event handling similar to your Bitrix24 + Twilio flow. For your Phase 1, I’d structure Bitrix24 using native REST APIs, automation triggers, and webhook listeners tied directly to Twilio Messaging Services and Elastic SIP Trunking. The important part is keeping the communication layer open: inbound calls, SMS, and WABA events should pass through centralized webhook handlers instead of closed marketplace apps, so Retell AI and Botpress can later consume the same events cleanly. I’m also familiar with Meta Business Manager approval flows, WhatsApp template handling, call recording architecture, and multi-agent routing inside CRM dashboards. For Bitrix24 specifically, I’d first verify whether your current CRM Marketing setup already exposes the required webhook permissions for outbound WhatsApp template orchestration. Best regards
$300 USD in 5 days
4.5
4.5

Dear Client, I’m an experienced full-stack developer with over 10 years of experience in web and mobile application development, specializing in building scalable, responsive, and high-performance solutions for diverse business needs. I understand you are looking for a reliable developer to build or improve your project, including web or mobile applications similar to CRM, dashboards, or APIs, and I have worked on similar solutions successfully. My skills in React, Vue, Laravel, PHP, Python, REST APIs, and database design ensure efficient and high-quality delivery. Feel free to share more details or ask questions. I’m ready to refine my approach to match your exact requirements. Looking forward to working with you. Best regards, Md Ruhul Ajom
$200 USD in 6 days
5.4
5.4

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, thank you for sharing the detailed project brief. I can build your automated customer service system for the real estate agency using Bitrix24 and Twilio infrastructure with a streamlined and efficient design. I will deliver: • Configuration and cleanup of the sales funnel in Bitrix24 • Creation of automation rules based on customer behavior • Integration of Twilio for seamless telephony communication • Implementation of WhatsApp Business API and SMS integration via Twilio • Integration of multi-agent chat feature within Bitrix24 You will also receive technical documentation for all implemented connections. I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag.
$250 USD in 7 days
4.4
4.4

✋ Hi There!!! ✋ The Goal of the project:- Optimize Bitrix24 CRM and integrate Twilio for calls, SMS, and official WhatsApp Business API with full scalability for future AI connections. I have carefully read and understood your complete project description and can deliver a clean, fully automated solution. I am the best fit for this project because of my 9+ years experience as a full stack developer with deep expertise in Bitrix24 and Twilio integrations. I will configure and automate the sales funnel, integrate Twilio with Elastic SIP Trunking for calls, and connect WABA and SMS securely to Bitrix24 with multi-agent chat. I provide UI design, database management, testing, and full source code delivery. I have completed similar CRM-Twilio integrations for real estate and service businesses with seamless multi-channel communications. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!
$251 USD in 11 days
4.6
4.6

Hi, I've worked extensively with Bitrix24 and Twilio, optimizing CRM workflows and integrating APIs for real estate agencies. I can help structure your sales funnel, automate based on customer behavior, and set up a scalable Twilio number for telephony and WABA. If you'd like, we can start with a small trial to ensure alignment before moving to larger tasks. Best Regards, Ivica
$275 USD in 7 days
4.2
4.2

Hello, I have extensive experience with Bitrix24 and Twilio, making me well-suited for your automated customer service system. I will optimize the CRM by cleaning up the sales funnel and creating automation rules based on customer behaviors. For Twilio integration, I've configured SIP Trunking to facilitate call recording and ensure scalability, managing voice and SMS communications directly from Bitrix24. In my previous project, I integrated WhatsApp Business API with Twilio, enabling bulk messaging and multi-agent support through a seamless Bitrix24 connection. For this project, I will prioritize a REST API structure for open scalability in Phase 2. For the Twilio architecture, would you prefer the use of Elastic SIP Trunking for future AI integrations or a more flexible approach using a dedicated SIP server?
$250 USD in 3 days
4.2
4.2

Hi, this phase sounds less like a simple CRM setup and more like building the foundation for a customer service pipeline that won’t block Phase 2 later. I can help structure Bitrix24 around clean lead/deal/contact workflows, connect Twilio for calls, SMS, and WhatsApp Business, and keep the REST API/webhook layer open so Retell AI and Botpress can be added later without reworking the CRM. I’d start by mapping the sales funnel, Twilio number flow, WABA/SMS requirements, and advisor handoff points before configuring anything. The main risk is using shortcuts or closed marketplace tools that work now but create limits later, so I’d keep the implementation native, documented, and easy to extend. Thanks!
$250 USD in 7 days
3.9
3.9

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