Full-Stack Developer Needed to Finish HubSpot + PandaDoc + Bill.com Integration

@augurstech

A Warm Hello! We are readily available to start working on this project! We are a full-stack development agency focused on API integrations, workflow automation, and production-grade system reliability. We specialize in stepping into partially completed systems (like yours at ~80%) and getting them fully functional, stable, and scalable. If you’re looking for a team that can come in, understand the system quickly, and get everything working end-to-end without friction, we’re ready. Best regards, Ana

@ruchiakhani

I love roasted almond ice cream. I have worked on complex platforms where multiple APIs were used which has been listed in your project requirement , and I am well-versed in API integrations. I am currently in the final stage of a project and can start immediately.

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Node.js, PostgreSQL, Software Development, Typescript, Full Stack Development, Backend Development, API Integration and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@emilesd617

Hi, I am a full-stack developer with 8 years of rich experience with a background in API integrations and workflow systems. I am familiar with Node.js, TypeScript, Supabase, HubSpot API, and PandaDoc API. For this project, the most important part is making the full workflow reliable end-to-end across multiple external services. I will connect each step cleanly, handle edge cases like missing records and async events, and ensure payment, document, and onboarding flows stay fully synced without breaking. 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.

@AlexVydrin

Hello. I have extensive experience building complex backend workflows using Node.js and TypeScript, and I am highly proficient with the specific APIs you mentioned, including HubSpot, PandaDoc, and Bill.com. I specialize in connecting distributed services and handling API logic for seamless data synchronization. My process is to identify the remaining gaps in your 80% finished system, troubleshoot edge cases, and ensure the entire chain from proposal creation to project initialization in Motion is reliable. I am very comfortable working within Supabase environments to manage triggers and state changes. I can start immediately and am ready to dive into the codebase today. My favorite ice cream flavor is mint chocolate chip. Please let me know the best way to access the repo so we can get this workflow finished quickly.

@dmytroy7

Hello, I have read your project thoroughly and know how to handle it. In my opinion, the crucial challenge here is ensuring seamless API integrations between all platforms involved to finalize the workflow. Completing this will significantly streamline the process of proposal management and customer onboarding. I have extensive experience with API integrations and have previously worked on similar projects that involved HubSpot, PandaDoc, and Bill.com. My background in Node.js and TypeScript equips me to connect and complete the existing logic effectively. For this project, I'll utilize a structured approach: 1. Assess the existing code and integrations. 2. Implement the necessary API connections step-by-step. 3. Conduct thorough testing of the entire workflow. 4. Address edge cases to ensure reliability. Thank you. Dmytro

@haseebsidd07

Hey , I just went through the project description, and I see you are looking for someone experienced in PostgreSQL, Full Stack Development, API Integration, Backend Development, Typescript, Software Development and Node.js. It instantly reminded me of a client who faced similar challenges, and I knew I had a tailor-made solution for it. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: • Is there anything else you’d like to add to the project details? • What’s the top hurdle you’re facing with this project? • What is the timeline to get this done? Why Choose Me? 250+ Projects. 5 Years. Zero Misses. My reputation is built on a single metric: Flawless Execution. While others promise quality, my last 100+ consecutive 5-star reviews prove it. I don’t just finish the job; I set the standard. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) The portfolio here is just the tip of the iceberg. To respect client confidentiality, my recent heavy-hitters aren't public, but I can share them 1-on-1. Click the 'CHAT' button, and I’ll send over the relevant samples immediately for your review. Regards, Abdul Haseeb Siddiqui.

@alirashdi26

Hey , I just finished reading the job description and I see you are looking for someone experienced in Backend Development, PostgreSQL, Typescript, Software Development, Node.js, Full Stack Development and API Integration. 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? Deliver high-quality work with a strong focus on accuracy, efficiency, and client objectives. Maintain a proven record of long-term client satisfaction with consistently positive feedback. Earn 5-star ratings on recent projects, reflecting reliability and clear communication. Work with a structured, detail-oriented approach to ensure timely and accurate delivery. Availability: Full-time freelancer with flexible availability and fast response times (Eastern Time). 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, Ali

@ami58abf92fbb39b

With over 8 years of professional experience, I've extensively worked with the platforms mentioned in your description. My favorite ice cream flavor is mint chocolate chip, by the way. As someone who has specialized not only in backend development but also in full-stack development, I have a comprehensive understanding of Node.js and PostgreSQL - two key aspects of your tech stack. The fact that your project is already 80% complete means that efficient and clean integration is crucial for its successful completion. This is where my expertise lies - connecting individual pieces seamlessly to create a fully functional system. I pride myself on developing reliable and scalable solutions employing proper testing methodologies to catch any potential issues or edge cases - ultimately ensuring an end-to-end workflow that's robust. Client satisfaction has, and always will be, my top priority. Hence, you can expect clear and responsive communication throughout our collaboration, regular progress reporting, attention to detail, and a commitment to delivering polished, fully-tested, bug-free solutions, all on time. Let's have a detailed discussion about your requirements and how I can further contribute to bringing your vision to fruition with precision and excellence

@TeamGTW

Hello! Based on your project description, you are looking to set up and configure a large event website using WordPress and The Events Calendar plugin, ensuring a clean, modern, and fully responsive experience. The goal is to create a structured platform where events are properly organized, easy to manage, and simple for visitors to browse across all devices. I will focus on delivering a fully functional WordPress website featuring complete installation and configuration of your theme, proper setup of The Events Calendar plugin, and creation of all required main pages. The event system will be structured so you can easily add, categorize, and manage events from the dashboard without technical complexity. The design will be optimized for clarity, usability, and mobile performance while maintaining a professional and engaging look. I specialize in building and configuring WordPress-based event systems, including calendar integrations, dynamic content structures, and user-friendly admin workflows that allow non-technical users to manage content effortlessly. Please contact us to discuss your preferred event structure, categories, and display style so that we can define the setup and ensure the system matches your exact workflow needs. Best regards, Nikita Gupta

@oleksandrp60

Hi there, Mint chocolate chip Which parts of the flow are already working today, HubSpot sync, PandaDoc creation, BILL invoice creation, or the post payment onboarding step? Are BILL paid events already coming back into your app through a verified webhook, or does that payment confirmation path still need to be built cleanly end to end? I can come in and finish this as a practical integration job, with clean mapping between your app and HubSpot, PandaDoc, BILL, Motion, and the messaging layer so the workflow runs reliably without duplicate records or missed handoffs. I would focus first on idempotent create or update logic, verified payment driven onboarding, and full end to end testing so the whole proposal to payment to project flow works in one pass. I would be happy to discuss further on chat. Best Oleksandr

@ShaunG24

Hello, I understand that a key technical challenge here is ensuring seamless API integration between HubSpot, PandaDoc, and Motion, particularly in creating and managing records in real-time. This matters because any delays or errors in this workflow could impact your client's experience and lead to lost deals. To mitigate this risk, I prioritize thorough testing of edge cases to ensure reliability throughout the integration process. With my experience in API integrations, particularly with platforms like HubSpot and PandaDoc, I am well-equipped to handle the requirements of this project. I have successfully completed similar integrations where I managed contact and deal synchronization, created dynamic proposal documents, and ensured effective communication via email and SMS. This involved a deep understanding of each platform's API capabilities and limitations, which I believe aligns well with your needs. My approach would involve an initial discovery phase to review the existing workflow, followed by implementing the necessary API connections in Node.js and TypeScript. I'd focus on testing the entire workflow for reliability and performance, ensuring all edge cases are addressed before going live. Regular check-ins during development would also be part of the process to keep you informed and aligned. Could you clarify the current status of the existing integration? - What specific edge cases have you encountered so far? - What is your timeline for completing this project? Looking forward to hearing from you, Shaun

@jsclark1085

Hi Hiring Manager, I checked your project details and I’m very interested. I’m a full stack developer with strong experience in Node.js and JavaScript, building REST APIs, real-time systems, and scalable backend services. I also handle frontend when needed. I can start immediately. Best regards

@SidUSA

Hi, Our team recently fixed a similar multi-platform integration for a logistics firm that needed custom metadata injected into automated documents and used the Node.js SDKs to hook into the API events and built a TypeScript based flow that validated inputs before updating the project management suite then corrected their integration structure to make sure the data actually showed up in the dashboards across all systems. This fix stopped their customer data from being lost during sync and made the whole onboarding process way faster for their team. Quantum Code Solutions is eager to discuss the project further. Reach out to initiate a conversation! Best regards, Quantum Code Solutions.

@tdkcode

Hi, I’ve worked on similar multi-API workflows (CRM, billing, e-sign, webhooks) and can quickly finish and stabilize your existing system. Strong experience with Node.js/TypeScript, Supabase, and integrations like HubSpot, PandaDoc, and billing platforms. I focus on clean orchestration, avoiding duplicates, and making flows fully reliable end-to-end. I can jump in, review the current 80%, connect the remaining pieces, and fully test the workflow including edge cases and webhook handling (especially payment → onboarding → Motion project). Available to start immediately. Favorite ice cream: cookies & cream

@ksaweryk4

As a veteran Machine Learning Engineer & Python Backend Developer with over 6 years of experience, I'm excited to offer my comprehensive skill set for your project. Not only do I specialize in end-to-end ML pipelines and large-scale backend architectures, but I also bring expertise in API integrations which is essential to accomplish your task efficiently. I'm no stranger to dealing with complex workflows and intricate API connections similar to what you're seeking for this project. My practical approach and real-world problem-solving skills align seamlessly with your vision of a swift yet reliable finish. More importantly, let me put your mind at ease by saying that vanilla has always been my favorite ice cream flavor! Given my experience, proficiency with your tech stack, and demonstrated enthusiasm for this project, I'm eager to work alongside you to not just complete this integration but make it truly seamless and productive.

@leonardojosel

Hello I hope you are doing well. I will complete your workflow by connecting HubSpot PandaDoc Bill com Motion and Resend Quo with clean API logic and full end to end testing and I can start in 2 hours with first demo in 12 hours. I completed a similar integration in 32 hours where I connected CRM e sign invoicing and automation APIs with reliable production flow. My favorite ice cream flavor is vanilla. Hourly rate is 12 USD per hour with availability of 20 hours daily. IMPORTANT I will ensure full workflow from proposal creation to payment and onboarding works without failure. IMPORTANT I will handle edge cases contact creation sync data across systems and ensure reliable messaging. My solution is to audit current code connect APIs finalize logic test full flow handle errors and deploy stable system. I provide real time communication with 20 hours daily interaction and daily updates and I work until 100 percent completion. Questions Which integrations are currently failing Do you have sandbox accounts for all APIs Any known edge cases already identified Thank you I look forward to working with you

@bohdanshypovych

Hi, Completing your integration workflow across HubSpot, PandaDoc, and Motion requires a developer who can navigate the intricacies of multiple APIs and ensure flawless data flow. One crucial aspect of this project will be managing the onboarding and account creation processes after invoice payment, as this directly impacts customer satisfaction and retention. A well-implemented integration will facilitate seamless communication between your systems, reducing the risk of data inconsistencies and improving the overall user experience. In my previous work, I have successfully integrated various platforms using Node.js and TypeScript, handling API connections for systems like CRM and document management tools. I focused on ensuring that the data moved smoothly, addressing edge cases that often arise during user onboarding and payment processing. My experience with HubSpot and PandaDoc APIs positions me well to tackle the challenges you face in this project. To approach this integration, I would first conduct a thorough analysis of your existing workflow and logic. This would involve identifying key data points, mapping out the integration process, and setting up test cases for edge scenarios. Once the integration is implemented, I would conduct end-to-end testing to validate all functionalities and ensure that the system behaves as expected under various conditions. I can start immediately and my favorite ice cream flavor is mint chocolate chip. Thank you, Bohdan Shypovych

@vasylklymiu

Hi, I would like to grab this opportunity and will work till you get 100% satisfied with my work. I just applied after read your job posting carefully and I believe that I am good fit to your project. I'm a serious bidder. I will satisfy you with my high skills! I am an expert which have 8+ years of experience on Node.js, PostgreSQL, Software Development, Typescript, Full Stack Development, Backend Development, API Integration I am looking forward to meet you to discuss the further detail about this project. Looking forward to hearing from you. Warm Regards